阅读说明：本技术 用于借助于旋转剥离机移除电缆线的屏蔽箔的方法和用于支持电缆线的屏蔽箔的移除的设备 (Method for removing a shielding foil of an electric cable by means of a rotary stripping machine and device for supporting the removal of a shielding foil of an electric cable ) 是由 P·伯格 R·德施勒 M·约斯特 于 2019-07-09 设计创作，主要内容包括：本发明涉及一种用于移除具有纵向轴线(L)的电缆线(Ka)的屏蔽箔(K2)的方法,该电缆线从纵向轴线向外具有内部导体(K5)、电介质(K4)、屏蔽箔(K2)和绝缘护套(K1),该方法包括以下步骤：a.例如借助于旋转剥离设备的旋转刀片(23)在电缆线(Ka)的绝缘护套(K1)中形成第一深度(T1)的切口(EK),其中,第一深度(T1)小于或等于绝缘护套(K1)的厚度；b.通过将至少一个可径向调节的穿孔工具穿过在步骤a中产生的切口(EK)压入,直到穿孔工具到达第二深度(T2),在屏蔽箔(K2)中生成预定断点(S),其中,第二深度(T2)至少相当于绝缘护套(K2)的厚度加上屏蔽箔(K2)的厚度的至少一半；c.在预定断点(S)处撕裂屏蔽箔；和d.拔掉屏蔽箔(K2)。本发明还涉及一种用于实现根据本发明的方法的设备。(The invention relates to a method for removing a shielding foil (K2) of an electrical cable (Ka) having a longitudinal axis (L), which cable has, from the longitudinal axis outwards, an inner conductor (K5), a dielectric (K4), a shielding foil (K2) and an insulating sheath (K1), the method comprising the steps of: a. forming a cut (EK) of a first depth (T1) in an insulating sheath (K1) of the electrical cable (Ka), for example by means of a rotary blade (23) of a rotary stripping apparatus, wherein the first depth (T1) is less than or equal to the thickness of the insulating sheath (K1); b. generating a predetermined breaking point (S) in the shielding foil (K2) by pressing at least one radially adjustable perforation tool through the incision (EK) produced in step a until the perforation tool reaches a second depth (T2), wherein the second depth (T2) corresponds at least to the thickness of the insulating sheath (K2) plus at least half the thickness of the shielding foil (K2); c. tearing the shielding foil at a predetermined breaking point (S); pulling off the shielding foil (K2). The invention also relates to a device for implementing the method according to the invention.)

1. A method for removing a shielding foil (K2) of an electrical cable (Ka) having a longitudinal axis (L) from which outward the cable has at least one inner conductor (K5), a dielectric (K4), the shielding foil (K2) and an insulating sheath (K1), the method comprising the steps of:

a. forming an incision (EK) of a first depth (T1) in an insulating sheath (K1) of the electrical cable (Ka), for example by means of a rotary blade (23) of a rotary stripping device (100, 200, 300), wherein the first depth (T1) is less than or equal to the thickness of the insulating sheath (K1);

b. forming a predetermined breaking point (S) in the shielding foil (K2) by pressing at least one radially adjustable perforation tool through the incision (EK) produced in step a until the perforation tool reaches a second depth (T2), wherein the second depth (T2) corresponds at least to the thickness of the insulating sheath (K2) plus at least half the thickness of the shielding foil (K2);

c. tearing the shielding foil at the predetermined breaking point (S); and

d. removing the shielding foil (K2).

2. The method of claim 1, wherein between steps b and c or between steps c and d, the piercing tool is replaced to a position outside the insulating sheath.

3. Method according to any of claims 1 or 2, characterized in that between steps a and b the insulating sheath is partially or completely removed.

4. Method according to any of the preceding claims, characterized in that the shielding foil (K2) is at least partly made of metal, wherein the punching tool is connected to means for detecting contact with a conductive object, and wherein pressing in of the punching tool is stopped as soon as contact of the punching tool with the shielding foil (K2) is detected.

5. Method according to any of claims 1-4, characterized in that the cable (Ka) has a shielding braid (K3) between a dielectric (K4) and a shielding foil (K2), and wherein pressing in the perforating tool is stopped as soon as contact of the perforating tool with the shielding foil (K2) or the shielding braid (K3) is detected.

6. Method according to any one of claims 4 or 5, characterized in that during the detection of the contact of the perforation tool with the shielding foil (K2) or with the shielding braid (K3), the relative position of the perforation tool with respect to the longitudinal axis (L) is transmitted to an analysis device.

7. Method according to any of claims 4 to 6, characterized in that after detecting contact with the shielding foil (K2) or with the shielding braid (K3), the piercing tool is advanced radially by a predetermined value in the direction of the inner conductor (K5) of the electrical cable.

8. Method according to any of the preceding claims, characterized in that step b is repeated at least once after the piercing tool has been driven back and has been rotated around the cable line (Ka) by an adjustment angle (a).

9. Method according to any one of the preceding claims, wherein the perforation tool is a blade of a rotary stripping apparatus, wherein the blade is not rotated during step b.

10. The method of any one of claims 1 to 9, wherein the piercing tool is a needle.

11. The method of claim 10, wherein the needle is spring loaded.

12. The method of any one of claims 1 to 11, wherein the perforation tool is ultrasonically energized.

13. Method according to claim 12, characterized in that the ultrasonic excitation has a frequency between 10 and 100kHz, preferably between 20 and 80kHz, preferably between 30 and 50 kHz.

14. Method according to any one of the preceding claims, characterized in that step c) and/or step d) are carried out by means of a removal device (400), the removal device (400) comprising clamping jaws (401,402) for clamping an insulating sheath (K1) of the electrical cable (Ka) or the shielding foil (K2), wherein the shielding foil (K2) is torn at the predetermined breaking point (S) by a translational and/or rotational movement of the clamping jaws (401, 402).

15. Method according to any one of the preceding claims, characterized in that between and/or during steps c and d the clamping pincers (401,402) are moved to and fro around the longitudinal axis (L).

16. Method according to claim 15, characterized in that with the reciprocating movement of the clamping jaws (401,402) around the longitudinal axis (L) a movement is first made which is opposite to the winding direction of the shielding braid (K3).

17. Method according to any of claims 14-16, characterized in that the cable with the shielding foil (K2) is bent at the predetermined breaking point (S) by the movement of the clamping jaws (401, 402).

18. Method according to any one of claims 14 to 17, wherein the clamping jaws (401,402) are moved in a circular or helical manner with respect to the longitudinal axis (L) of the cable line (Ka).

19. Method according to any one of claims 14 to 18, characterized in that the clamping jaws (401,402) of the removal device (400) are mounted on a gimbal or a gimbal suspension.

20. Method according to any one of claims 14 to 19, characterized in that the surface (406) of the clamping pincers (401,402) in contact with the insulating sheath of the cable line or with the shielding foil is composed of a special material, so that the static friction coefficient prevailing between the clamping pincers and the insulating sheath is greater than between metal and the insulating sheath.

21. Method according to claim 20, characterized in that the surface (406) of the clamping pincers (401,402) in contact with the insulating sheath of the cable line or with the shielding foil is constituted by an elastomer.

22. Method according to any one of claims 14-21, characterized in that the clamping pincers (401,402) have means for generating a suction force on the insulating sheath of the cable or on the shielding foil.

23. Method according to any of claims 14-22, characterized in that the surface (406) of the clamping pincers (401,402) in contact with the insulating sheath of the cable line or with the shielding foil has a structure that increases the static friction.

24. Method according to any one of the preceding claims, characterized in that the removed part of the insulating sheath of the electric cable is separated from the clamping pincers by means of compressed air and/or by means of ejector pins.

25. A device (100, 200, 300) for supporting removal of a shielding foil of an electrical cable, comprising

A first toothed pulley (1) and a second toothed pulley (2) which are coaxially and synchronously rotatable, but angularly adjustably rotatable relative to each other, and

a tool flange (21) coaxially connected to the first toothed pulley (1), in which tool flange a central opening (A) is provided through which a cable can be guided or passed, wherein the tool flange (21) comprises one or more movably attached tools (23), wherein the tools (23) are movable relative to the axis of rotation (X) by means of a setting means (18) connected to the second toothed pulley (2),

it is characterized in that

The radial distance of the tool (23) from the axis of rotation (X) is adjustable by an angular rotation between the first toothed pulley (1) and the second toothed pulley (2) driven by a common drive means (13).

26. The apparatus (100, 200, 300) according to claim 25, characterized by comprising a third toothed pulley (3) and a fourth toothed pulley (4) drivable by the drive means (13), wherein the first toothed pulley (1) is drivable by the third toothed pulley (3) via a first toothed belt (11) and the second toothed pulley (2) is drivable by the fourth toothed pulley (4) via a second toothed belt (12).

27. The apparatus (100) according to claim 26, comprising at least one deflection roller (5) and one tension roller (6), said at least one deflection roller (5) and one tension roller (6) deflecting, preferably converging, the second toothed belt (12), wherein an angular rotation between the first toothed pulley (1) and the second toothed pulley (2) is enabled by a change in position of the deflection roller (5) and/or the tension roller (6).

28. The apparatus (100) according to claim 27, wherein said third toothed pulley (3) and said fourth toothed pulley (4) are integral.

29. The apparatus (200) of claim 26, comprising

A deflection belt (30) held in tension connecting the third toothed pulley (3) and the fourth toothed pulley (4), and

a first movable deflecting roller (31a) arranged along the deflecting belt (30) between the third toothed pulley (3) and the fourth toothed pulley (4) and deflecting the deflecting belt (30),

characterized in that the angular rotation between the first toothed pulley (1) and the second toothed pulley (2) can be achieved by a change in position of the first movable deflection roller (31 a).

30. The apparatus (200) according to claim 29, wherein the centre of the first movable deflecting roller (31a) is always arranged on a perpendicular bisector between the centre of the third toothed pulley (3) and the centre of the fourth toothed pulley (4), and wherein the diameter of the first movable deflecting roller (31a) corresponds to the peripheral distance between the toothed pulley (3) and the toothed pulley (4).

31. The apparatus (200) according to any one of claims 29 or 30, comprising

At least one first non-movable deflection roller (31c) and one second non-movable deflection roller (31d), and

a second movable deflection or tensioning roller (31b) mounted on a carriage (32) together with the first movable deflection roller (31a), wherein the second movable deflection or tensioning roller (31b) is arranged along the deflection belt (30) between the first non-movable deflection roller (31c) and the second non-movable deflection roller (31d) and deflects the deflection belt (30),

characterized in that the angular rotation between the first toothed pulley (1) and the second toothed pulley (2) can be achieved by a translational movement of the carriage (32).

32. An apparatus (100, 200) according to any of claims 27 or 29-31, characterized by comprising a second motor (14) with which the change of position of the deflection roller is drivable, wherein an angular rotation between the first toothed pulley (1) and the second toothed pulley (2) is achievable.

33. An apparatus (300) according to claim 26, comprising a planetary gearing (50) with a ring gear (55a), planet wheels (51) and a sun wheel (52), wherein the revolution of the planet wheels (51) around the sun wheel (52) can be driven by the rotation of the fourth toothed belt wheel (4), wherein a shaft (53) connected to the third toothed pulley (3) can be driven by the revolution of the planet wheels (51) around the sun wheel (52), wherein the sun wheel (52) is mounted rotatably about a common axis of rotation of the third toothed pulley (3) and the fourth toothed pulley (4), and wherein an angular rotation between the first toothed pulley (1) and the second toothed pulley (2) can be achieved by rotation of the sun gear (52).

34. An apparatus (300) according to claim 33, characterized by comprising a second motor (14) with which the rotation of the sun wheel (52) can be driven, by means of which rotation of the sun wheel (52) an angular rotation between the first toothed pulley (1) and the second toothed pulley (2) can be achieved.

35. The apparatus (300) according to claim 25, comprising a third toothed pulley (3) and a fifth toothed pulley (54) drivable by means of the drive means (13), the first toothed pulley (1) being drivable by the third toothed pulley (3) via a first toothed belt (11) and the second toothed pulley (2) being drivable by the fifth toothed pulley (54) via a second toothed belt (12), and

a planetary gear (50) having planet wheels (51) and a sun wheel (52), the sun wheel (52) being connected to the fifth toothed pulley (54) and being drivable with the fifth toothed pulley (54), wherein the planetary gear (50) is arranged inside a hollow body (55) having an internal toothing (55a),

wherein a shaft (53) connected to the planet wheel (51) and the third toothed pulley (3) can be driven by the revolution of the planet wheel (51) around the sun wheel (52), and

wherein an angular rotation between the first toothed pulley (1) and the second toothed pulley (2) can be achieved by a rotation of the hollow body (55).

36. The apparatus (100, 200, 300) according to any of claims 25 to 35, wherein the tools (23) are arranged evenly on the tool flange (21).

37. The apparatus (100, 200, 300) according to any of claims 25 to 36, wherein the tool (23) is mounted on the tool flange (21) in a swivel fit around a pivot pin (20).

38. The apparatus (100, 200, 300) according to any of claims 25 to 37, characterized in that the tool (23) is mounted on the tool flange (21) in a radially displaceable manner.

39. The apparatus (100, 200, 300) according to any of claims 25 to 38, characterized in that the angular rotation between the first toothed pulley (1) and the second toothed pulley (2) is controllable with electronics.

40. The apparatus (100, 200, 300) according to any of claims 25 to 39, wherein the tool (23) is a blade.

41. The apparatus (100, 200, 300) according to claim 40, characterized in that it comprises detection means with which contact between the blade (23) and the electrical conductor of the cable to be stripped is detectable.

Technical Field

The invention relates to a method for removing a shielding foil of an electric cable. More specifically, the invention relates to a method for removing a shielding foil of an electric cable by means of a rotary stripping machine. In particular, the invention relates to a method for removing a partially insulating and partially conductive shielding foil of an electrical cable by means of a rotary stripping machine. The invention further relates to a device for supporting the removal of a shielding foil.

Background

The machining of the cable end of an electrical cable, particularly a coaxial cable with a shielding foil, is a multi-step process starting with cutting to length by cutting or sawing the cable, until the connector is crimped onto the inner conductor. A sub-step of this process is the removal of the shielding foil, which is usually wound in a spiral around the metal shielding braid of the cable line. The removal of the shielding foil, which is usually composed of PET-coated aluminum foil, is a complicated process, since the shielding foil is usually very thin and in some places double-layered due to its overlap.

To date, in the above cable end machining methods, insulation is typically cut and removed to the shielding foil. The shielding foil is then typically removed manually. Manual removal of the foil is fraught with uncertainty and does not guarantee a constant process quality. Furthermore, this step, which is performed manually, takes significantly longer than when it is part of an automated process, and is therefore associated with higher long-term costs.

In the case of a normal coaxial cable in which no shielding foil is present, the peeling proceeds stepwise. Typically a first incision is made through the outer protective sheath and the screen or shield, whereupon the separated layers are immediately removed. The dielectric is then cut to the inner conductor and partially or completely removed. The protective sheath is then cut to the screen or shield and partially or completely removed. The protective screen or shield or inner conductor is partially removed, for example to prevent abrasion or oxidation, until further processing of the cable.

In the case of cables with shielding foils, the removal of the insulating sheath can be carried out with a rotary stripping machine known in the art. Subsequently, the shielding foil is unwound manually and cut to the desired point. As explained above, removing the typically thin shielding foil presents special challenges because, unlike insulation, it cannot be cut rotationally because rotational cutting of the shielding foil often results in undesired damage of the shielding braid due to out-of-roundness of the cable.

Known from the prior art are methods and devices supporting the removal of the metal shield or shielding foil of a coaxial cable by heat treatment of the shielding foil to be removed. Known methods based on supporting heat treatment of shielding foils do not always lead to satisfactory (or above all reproducible) results.

Starting from the prior art, it is therefore an object of the present invention to overcome the above-mentioned drawbacks and to propose a method for removing a shielding foil of an electric cable which makes it possible to remove the shielding foil satisfactorily and in a reproducible manner with an automated process and thus to damage the underlying metallic shielding braid as little as possible. Another object of the invention is to propose a device for supporting the removal of the shielding foil of an electric cable.

Disclosure of Invention

According to the invention, these objects are firstly achieved by the elements of the two independent claims. Further advantageous embodiments emerge from the dependent claims and the description.

In particular, the object of the invention is achieved by a method for removing a shielding foil of an electrical cable having a longitudinal axis, the cable having at least one inner conductor, a dielectric, the shielding foil and an insulating sheath outwards from the longitudinal axis, the method comprising the steps of:

a. forming a cut of a first depth in the insulating sheath of the electrical cable, for example by means of a rotating blade of a rotary stripping apparatus, wherein the first depth is less than or equal to the thickness of the insulating sheath;

b. forming a predetermined breaking point in the shielding foil by pressing at least one radially adjustable perforation tool through the cut created in step a until the perforation tool reaches a second depth, wherein the second depth corresponds to at least the thickness of the insulating sheath plus at least half the thickness of the shielding foil;

c. tearing the shielding foil at a predetermined breaking point (S); and

d. the shielding foil is removed.

The inventors have found that it is advantageous to form the predetermined breaking point in the shielding foil by pressing at least one radially adjustable perforation tool in a cut-out in the insulating sheath of the electrical cable. The incision is preferably made by means of a rotary peeling device.

In a first preferred embodiment of the method according to the invention, the piercing tool is put back into position outside the insulating sheath between steps b and c or between steps c and d. Thus, removal can be performed more easily; furthermore, the cable can be bent in order to allow the shielding foil to tear at a predetermined breaking point. If the perforation tool is still located in the cut-out, bending of the cable will result in damage to, for example, the shielding braid.

In another preferred embodiment of the method according to the invention, between steps a and b, the insulating sheath is partially or completely removed. Thus, if desired, a perforation tool having a width greater than the width of the cut formed in the insulating sheath may be used. During partial or complete removal of the insulating sheath, any contact of the blade of the rotary stripping machine with the shielding foil or shielding braid is preferably detected if the removal is carried out, for example, with a rotary stripping apparatus. Thus, damage of the shielding foil or the shielding braid can be determined.

In another preferred embodiment of the method according to the invention, the shielding foil is at least partly made of metal, wherein the perforating tool is connected to the means for detecting contact with the electrically conductive object, and wherein the pressing in of the perforating tool is stopped as soon as contact of the perforating tool with the shielding foil is detected. Thus, it can be ensured that a sufficiently deep predetermined breaking point is formed in the shielding foil.

In another preferred embodiment of the method according to the invention, the cable has a shielding braid between the dielectric and the shielding foil, and wherein the pressing in of the perforating tool is stopped as soon as contact of the perforating tool with the shielding foil or shielding braid is detected. Thus, it can be ensured that the pressing in of the piercing tool is stopped if contact with a metal part of the shielding foil or with the shielding braid of the cable is detected. Therefore, the shield braid can be prevented from being damaged.

In another preferred embodiment of the method according to the invention, during the detection of the contact of the perforation tool with the shielding foil or shielding braid, the relative position of the perforation tool with respect to the longitudinal axis is transmitted to the analysis device. Thus, the position of the piercing tool can be recorded, which can be used for statistical purposes. For example, a statistical analysis may be performed that detects the diameter at the contact with the shielding foil or shielding braid. Such analysis may be used for process optimization or may be beneficial for assessing the quality of the cable set.

In a further preferred embodiment of the method according to the invention, the perforating tool is advanced radially by a predetermined value in the direction of the inner conductor of the electric cable after detecting contact with the shielding foil or shielding braid. The piercing tool can thus be advanced by a predetermined value. The predetermined value may correspond to, for example, the thickness of the shielding foil or a fraction of the diameter of the cable or any other characteristic value of the cable.

In another preferred embodiment of the method according to the invention, step b is repeated at least once after the piercing tool has been driven back and has been rotated around the cable wire by the adjustment angle. Thus, it is ensured that a predetermined breaking point is formed along a sufficiently long length of the shielding foil, preferably along the entire length of the shielding foil.

In another preferred embodiment of the method according to the invention, the perforation means are blades of a rotary stripping apparatus, wherein the blades are not rotated during step b. Thus, only one device is required to form the cut-out in the insulating sheath and the predetermined breaking point in the shielding foil.

In a further preferred embodiment of the method according to the invention, the perforation means is a needle. The predetermined breaking point can thus be formed in a particularly simple manner by means of the perforation.

In a further preferred embodiment of the method according to the invention, the needle is spring-loaded. Therefore, the shielding braid can be surely not damaged by the needle.

In a further preferred embodiment of the method according to the invention, the perforation tool is ultrasonically excited. Thus, the predetermined breaking point can be formed in a particularly simple manner by friction or heating and there is no pressure on the shielding foil and thus on the shielding braid. Thus, damage to the shielding foil can be prevented. Furthermore, the shape and sharpness of the perforation tool may be adapted to the shielding foil to be removed.

In another preferred embodiment of the method according to the invention, the frequency of the ultrasonic excitation is between 10 and 100kHz, preferably between 20 and 80kHz, preferably between 30 and 50 kHz. The excitation frequency of the perforation tool can thus be adapted to the shielding foil to be removed. In particular, the frequency may be selected based on the material of the shielding foil and/or its thickness. The frequency preferably selected will enable efficient formation of the predetermined breaking point but ensure as little damage to the shielding braid as possible.

In a further preferred embodiment of the method according to the invention, step c and/or step d are carried out by means of a removal device comprising clamping jaws for clamping an insulating sheath or a shielding foil of the electric cable, wherein the shielding foil is torn at a predetermined breaking point by a translational and/or rotational movement of the clamping jaws. By using such a removal device, the removal process can take place in a particularly simple manner.

In another preferred embodiment of the method according to the invention, the clamping pincers are moved back and forth around the longitudinal axis between and/or during steps c and d. During removal from the shielding braid, the shielding foil is thus loosened again and again so that it can be pulled down more easily.

In a further preferred embodiment of the method according to the invention, a movement counter to the winding direction of the shielding braid is first carried out with a reciprocating movement of the clamping pincers about the longitudinal axis. The initial static friction between the shielding foil and the shielding braid can thus be overcome, so that the shielding foil can be removed particularly easily.

In another preferred embodiment of the method according to the invention, the cable with the shielding foil is bent at the predetermined breaking point by movement of the clamping pincer. Thus, a tearing of the shielding foil can be generated in a simple manner at a predetermined breaking point.

In another preferred embodiment of the method according to the invention, the clamping pincers are moved in a circular or helical manner with respect to the longitudinal axis of the cable. The removal process and the tearing of the shielding foil at the predetermined breaking point can thus take place in a particularly easy manner.

In a further preferred embodiment of the method according to the invention, the clamping pincers of the removal device are mounted on a gimbal suspension. The clamping jaws can thus be moved in a helical manner around the axis of the cable and the shielding foil can be bent at a predetermined breaking point. Preferably, the clamping jaws in a gimbal suspension are hydraulically driven with a flow splitter or with counter-rotating spindles, so that the clamping jaws are always driven symmetrically with respect to the longitudinal axis.

In a further preferred embodiment of the method according to the invention, the surface of the clamping pincers in contact with the insulating sheath of the cable line or with the shielding foil is made of a special material, so that the static friction coefficient prevailing between the clamping pincers and the insulating sheath is greater than the static friction coefficient between the metal and the insulating sheath. The clamping jaws can thus clamp the insulating sheath particularly well and create a sufficiently large tension at the predetermined breaking point of the shielding foil.

In another preferred embodiment of the method according to the invention, the surface of the clamping pincers in contact with the insulating sheath of the electric cable or with the shielding foil is constituted by an elastomer. The coefficient of static friction between the insulating sheath and the clamping jaw can thus be increased in a simple manner. Furthermore, due to the elastomer, the cable will not be deformed by the clamping.

In a further preferred embodiment of the method according to the invention, the clamping pincers have means for generating a suction force on the insulating sheath or shielding foil of the cable line. The clamping jaws can thus clamp the insulating sheath particularly well and create a sufficiently large tension at the predetermined breaking point of the shielding foil.

In another preferred embodiment of the method according to the invention, the surface of the clamping pincers in contact with the insulating sheath of the cable line or with the shielding foil has a structure that increases the static friction. The clamping jaws can thus clamp the insulating sheath particularly well and also produce a sufficiently large tension at the predetermined breaking point of the shielding foil.

In another preferred embodiment of the method according to the invention, the removed portion of the insulating sheath of the electric cable is separated from the clamping pincers by means of compressed air and/or by means of ejector pins. The removed part of the insulating sheath can thus be simply removed from the clamping pincers.

The object of the invention is furthermore achieved by a device for supporting removal of a shielding foil of an electric cable, comprising: a first toothed pulley and a second toothed pulley which are rotatable coaxially and synchronously about an axis of rotation, but in an angularly adjustable manner with respect to each other; and a tool flange coaxially connected to the first toothed pulley, in which tool flange a central opening is provided through which the cable can be guided or passed, wherein the tool flange comprises one or more movably attached tools, wherein the tools are movable relative to a common rotational axis of the first and second toothed pulleys by means of a setting means connected to the second toothed pulley, wherein a radial distance of the tools from the common rotational axis of the first and second toothed pulleys is adjustable by means of an angular rotation between the first and second toothed pulleys driven by the common drive means.

With such an apparatus it is possible to accurately adjust the radial distance of the tool cutting, centering or holding the cable with respect to the axis of rotation of the apparatus using only the angular rotation between the first toothed pulley and the second toothed pulley. Furthermore, the apparatus requires only one drive means for the synchronous drive of the first toothed pulley and the second toothed pulley. Thus, there is no risk that the toothed pulleys no longer rotate synchronously over time, which would result in, for example, an inaccurate cut diameter, compared to known devices.

In a preferred embodiment of the invention, the device comprises a third toothed pulley and a fourth toothed pulley which can be driven by the drive means, wherein the first toothed pulley can be driven by the third toothed pulley via the first toothed belt and the second toothed pulley can be driven by the fourth toothed pulley via the second toothed belt. Therefore, the first toothed pulley and the second toothed pulley are easily allowed to rotate synchronously. It is also possible to construct the device in a very compact and space-saving manner. Furthermore, it is thus possible to arrange the third toothed pulley and the fourth toothed pulley coaxially or non-coaxially. The exact constructional design of the device according to the invention can thus be selected in a very flexible manner.

In a further preferred embodiment of the invention, the device comprises at least one deflection roller and one tension roller, which deflect (preferably converge) the second toothed belt, wherein the angular rotation between the first toothed pulley and the second toothed pulley can be achieved by a change in the position of the deflection roller and/or the tension roller. It is therefore possible, merely by a change in position, for example a purely translational movement, of the deflection roller and/or the tensioning roller, to produce an angular rotation between the first toothed pulley and the second toothed pulley and thus to change the position of the tool relative to the axis of rotation of the device. The device can thus be constructed very compactly.

In a further preferred embodiment of the invention, the third toothed pulley and the fourth toothed pulley are integral. This provides an even simpler constructional design of the device.

In another preferred embodiment of the invention, the device comprises a deflection belt which is kept tensioned and which connects the third toothed pulley and the fourth toothed pulley, and further comprises a first movable deflection roller which is arranged along the deflection belt between the third toothed pulley and the fourth toothed pulley and which deflects the deflection belt, wherein the angular rotation between the first toothed pulley and the second toothed pulley is enabled by a change in position of the first movable deflection roller. Thus, by merely changing the position of the first movable deflection roller, for example by a purely translational movement, it is possible to produce an angular rotation between the first toothed pulley and the second toothed pulley and thus to change the position of the tool with respect to the axis of rotation of the device. Due to the position of the first movable deflection roller between the third toothed pulley and the fourth toothed pulley, the tension of the first toothed belt or the second toothed belt is not dependent on the position of the deflection roller. The advance of the tool can thus take place more accurately and the angular rotation between the first toothed pulley and the second toothed pulley can be designed to be greater.

In another preferred embodiment of the invention, the centre of the first movable deflecting roller is always arranged on the perpendicular bisector between the centre of the third toothed pulley and the centre of the fourth toothed pulley, and the diameter of the first movable deflecting roller corresponds to the peripheral distance between the third toothed pulley and the fourth toothed pulley. With this configuration, the section of the deflecting belt between the third toothed pulley and the first movable deflecting roller extends parallel to the section of the deflecting belt between the first movable deflecting roller and the fourth toothed pulley. Thus, a linear relationship is created between the amount by which the position of the first movable deflection roller is changed and the angular rotation between the first toothed pulley and the second toothed pulley.

In another preferred embodiment of the invention, the device comprises at least one first and one second immovable deflection roller, and a second movable deflection roller which is mounted on the carriage together with the first movable deflection roller, wherein the second movable deflection roller is arranged along the deflection belt between the first and the second immovable deflection roller and deflects the deflection belt, and wherein the angular rotation between the first toothed pulley and the second toothed pulley can be effected by a translational movement of the carriage.

With this mechanism it is possible to generate an angular rotation between the first toothed pulley and the second toothed pulley with a pure translational movement of the carriage and thus to vary the position of the tool with respect to the axis of rotation of the device. This mechanism also has the advantage that the deflection belt is always kept under the same tension irrespective of the position of the first movable deflection roller. This makes a precise advance of the tool possible and prevents the deflection belt from being damaged by too high a tension.

In a further preferred embodiment of the invention, the device comprises a second motor, with which a change of position of the deflection roller is drivable, wherein an angular rotation between the first toothed pulley and the second toothed pulley is achievable. Thus, the change in position can occur quickly, accurately and in a reproducible manner. This can occur automatically and at high speed if the second motor is computer controlled.

In another preferred embodiment of the invention, the arrangement comprises a planetary gearing with a ring gear, a planet wheel and a sun wheel, wherein an orbit of the planet wheel around the sun wheel can be driven by a rotation of a fourth toothed pulley, wherein a shaft connected to the third toothed pulley can be driven by an orbit of the planet wheel around the sun wheel, wherein the sun wheel is mounted in such a way as to be rotatable around a common axis of rotation of the third toothed pulley and the fourth toothed pulley, and wherein an angular rotation between the first toothed pulley and the second toothed pulley can be achieved by a rotation of the sun wheel.

With this mechanism, the angular rotation between the first toothed pulley and the second toothed pulley and accordingly the setting of the position of the tool can be achieved by a rotational movement. The rotation of the sun wheel can thus be "converted" into an angular rotation between the first toothed belt wheel and the second toothed belt wheel, superimposed on the common rotation of the first toothed belt wheel and the second toothed belt wheel. This conversion of the angular rotation is independent of the rotational speed of the first toothed pulley and the second toothed pulley. This makes particularly simple and precise advancement of the blade possible.

In a further preferred embodiment of the invention, the device comprises a second motor, with which the rotation of the sun wheel is drivable, in such a way that an angular rotation between the first toothed pulley and the second toothed pulley is promoted. With the second motor, the position change can be performed in a reproducible, fast and accurate manner. This can occur in a fully automated manner if the motor is controlled by a computer.

In another preferred embodiment of the present invention, the apparatus comprises: a third toothed pulley and a fifth toothed pulley which can be driven by means of a drive means, the first toothed pulley being drivable by the third toothed pulley via a first toothed belt and the second toothed pulley being drivable by the fifth toothed pulley via a second toothed belt; and a planetary gearing having a planet wheel and a sun wheel, the sun wheel being connected with and drivable by a fifth toothed pulley, wherein the planetary gearing is arranged inside a hollow body having internal teeth, wherein a shaft connected to the planet wheel and the third toothed pulley can be driven by the revolution of the planet wheel around the sun wheel, and wherein an angular rotation between the first toothed pulley and the second toothed pulley can be achieved by rotation of the hollow body.

With this embodiment, the angular rotation between the first toothed pulley and the second toothed pulley and accordingly the setting of the position of the tool can be achieved by a rotational movement of the hollow body. This makes particularly simple and precise advancement of the blade possible.

In another preferred embodiment of the invention, the tools are arranged uniformly on the tool flange. This ensures accurate cutting, centering or holding of the cable.

In a further preferred embodiment of the invention, the tool is mounted on the tool flange in a swivel-fit about the pivot pin. The tool flange can thus be constructed compactly and the positioning means for advancing the tool can take the form of a simple positioning pin.

In a further preferred embodiment of the invention, the tool is mounted on the tool flange in a radially displaceable manner. Thus, the setting means may take the form of a helical flange.

In another preferred embodiment of the invention, the angular rotation between the first toothed pulley and the second toothed pulley can be controlled by electronics. Thus, the advancement of the blade can take place in a fully automated manner.

In another preferred embodiment of the invention, the tool is a blade. Thus, the cable can be quickly and accurately handled, e.g. can be stripped.

In another preferred embodiment of the invention, the device comprises detection means, with which contact between the blade and the electrical conductor of the cable to be treated is detectable. Thus, it can be detected whether the blade contacts the electrical conductor of the cable. Thus, it is ensured that the blade does not "damage" the electrical conductor. With such contact detection, the depth of the cut for subsequent processing can optionally be adjusted continuously statistically or the cutting dose can be intervened sufficiently quickly on the basis of the contact detection in the current cutting step before damage to the conductor occurs.

Contact detection can also be used to determine the optimum production cut and removal diameter prior to production using a test cut up to the time of blade-conductor contact using statistical methods.

Furthermore, the detector means can be used to control the incision position or removal length, since in case the blade is initially closed, the cable is manually or automatically lifted into contact with the blade, then the cable holder is closed, the blade is opened, and the cable holder brings the cable into the processing position.

Drawings

Fig. 1a shows a schematic cross-sectional view of an electric cable known in the prior art, which cable has a shielding foil to be removed;

fig. 1b shows a schematic side view of an electrical cable as known in the prior art, wherein a predetermined breaking point has been formed in the shielding foil to be removed;

fig. 2 shows a block diagram of a first preferred embodiment of the method according to the invention;

fig. 3 shows a block diagram of a second preferred embodiment of the method according to the invention;

fig. 4 shows a block diagram of a third preferred embodiment of the method according to the invention;

fig. 5 shows a perspective view of a first embodiment of the device according to the invention;

fig. 6 shows a front view of a first embodiment of the device according to the invention;

fig. 7 shows a perspective cross-sectional view of a first embodiment of the device according to the invention;

FIG. 8a shows the knife flange with the knife blade in a fully closed position;

FIG. 8b shows the knife flange with the knife blade in an intermediate position;

FIG. 8c shows the knife flange with the knife blade in the fully open position;

fig. 9 shows a perspective view of a second embodiment of the device according to the invention;

fig. 10 shows a perspective cross-sectional view of a second embodiment of the device according to the invention;

fig. 11 shows a perspective view of a third embodiment of the device according to the invention;

figure 12 shows a perspective cross-sectional view of a third embodiment of the device according to the invention;

fig. 13 shows a perspective view of a removal device for pulling out a shielding foil to be removed;

fig. 14 shows a sectional view of a removal device for pulling out a shielding foil to be removed; and

fig. 15 shows a perspective cross-sectional view of a clamping jaw of a removal device for pulling out a shielding foil to be removed.

Detailed Description

Fig. 1a shows in an exemplary manner a cross-sectional view of an electrical cable Ka known from the prior art, which comprises a shielding foil K2 to be removed. In addition to the shielding foil K2, the cable Ka has an insulating sheath K1, a shielding braid K3, a dielectric K4 and an inner conductor K5. The depth T1 corresponds approximately to the thickness of the insulating sheath K1, and the depth T2 corresponds to the thickness of the insulating sheath K1 and at least half of the shielding foil K2.

Fig. 1b shows a side view of a cable Ka with a longitudinal axis L, wherein a cut EK has been cut into the insulating sheath K1 and a predetermined breaking point S has been formed in the shielding foil K2. How the predetermined break point S is formed will be explained below and represents a partial aspect of the present invention.

Fig. 2 shows a block diagram of a method for removing a shielding foil of an electric cable line according to a first embodiment of the invention. The method starts with step a, in which a cut EK is cut in the insulating sheath K1 of the cable wire with the rotating blade of a rotary stripping machine until a depth T1 is reached. The purpose of this first step is to cut EK in the insulating sheath K1 of the electrical cable Ka without cutting the shielding foil K2. Cutting into the thin shielding foil with a rotating blade also typically causes damage to the underlying layers. To ensure that the shielding foil is not cut in step a, the cutting with the rotating blade is carried out to a depth T1, which is less than or equal to the thickness of the insulating sheath K1.

In a second method step b, a predetermined breaking point is formed in the shielding foil K2 using a non-rotating perforation tool. To achieve this, a perforation tool is pressed into the incision EK up to a depth T2 corresponding to at least half the thickness of the insulating sheath and the thickness of the shielding foil. The pressing of the non-rotating punching tool into the shielding foil is sufficient to form at least one predetermined breaking point S in the shielding foil K2. Preferably, the perforation means is the blade of the stripping device used in step a. It should be noted that in step b, the blade of the peeling apparatus does not rotate. However, the perforation tool may be another suitable tool, such as, for example, a needle. With a precise adjustment of the indentation depth in step b it can be ensured that the shielding braid K3 underneath the shielding foil K2 is not damaged.

In step c, the shielding foil K2 is torn at a predetermined breaking point S. In step d, the shielding foil K2 is removed, preferably together with the insulating sheath K1. As indicated in fig. 2, partial removal of the insulating sheath K1 may be performed between steps a and b. Steps c and d can be carried out manually or by means of a removal device provided for this purpose (see fig. 13 to 15).

Fig. 3 shows a block diagram of a method for removing a shielding foil of an electric cable line according to a second embodiment of the invention. Preferably for carrying out the method is a rotary stripping apparatus comprising means for detecting contact of the blade with the electrically conductive object. The formation of the predetermined breaking point in the shielding foil can thus be carried out by means of a continuous advancement of the non-rotating blade of the stripping device until the depth T2 is reached or until contact of the blade with the shielding foil or with the shielding braid is detected. The possibility of detecting contact of the blade with the shielding foil or with the shielding braid ensures that the shielding braid is not damaged by the formation of predetermined breakpoints. In this embodiment, a partial removal of the insulating sheath is also foreseen between the first and second step. After detecting contact with the shielding foil, the blade may also be advanced further in the direction of the inner conductor. It can thus be ensured that a predetermined breaking point is also formed in those areas where the shielding foils overlap.

Fig. 4 shows a block diagram of a method for removing a shielding foil of an electric cable line according to a third embodiment of the invention. In this method, in the case where the blades of the peeling apparatus have a predetermined angular position, after forming a predetermined breaking point in the shielding foil, the blades are retracted so that they no longer contact the shielding foil, and are rotated by an angle α. In this new angular position the blade is then pressed into the shielding foil again. Several such adjustments of the angular position of the tool and subsequent pressing into the shielding foil are foreseen. After the shielding foil is pressed in at least twice, the jacket and the shielding foil are removed. By pressing in the shielding foil with the blades in different angular positions, it is ensured that a predetermined breaking point is formed along the entire circumference of the cable. Also in this third embodiment, partial or complete removal may be performed after rotational slitting of the insulating sheath.

Fig. 5 shows a perspective view and fig. 6 shows a front view of a first embodiment of a device 100 according to the invention for supporting removal of a shielding foil of an electric cable. In this embodiment, the third toothed pulley 3 and the fourth toothed pulley 4 are driven by a common drive means (here by a first motor 13) through the same drive shaft 10. The toothed pulleys 3 and 4 are screwed by means of the screws 10a and thus rotate synchronously. Toothed pulley 3 has slotted holes 3a, slotted holes 3a being available for relative angular rotation of toothed pulleys 3 and 4 to adjust the knife opening.

The third toothed pulley 3 drives the first toothed pulley 1 via a first toothed belt 11 and the fourth toothed pulley 4 drives the second toothed pulley 2 via a second toothed belt 12. Thus, the first toothed pulley 1 and the second toothed pulley 2 rotate coaxially and synchronously. However, the first toothed pulley 1 and the second toothed pulley 2 are rotatably mounted in an angularly adjustable manner with respect to each other. The first toothed pulley 1 and the second toothed pulley 2 define an opening a through which the electric cable with the shielding foil to be removed can be guided or passed.

With reference to fig. 7, it can be seen that the second toothed pulley 2 is connected to a positioning pin 18 via a bearing bush 16 and via an adjusting ring 17. The first toothed pulley 1 is connected to a pivot pin 20 via a rotor 19. Also connected to the rotor 19 is a tool flange 21, here a knife flange, on which tool flange 21 a tool 23, here a blade, is mounted in such a way that it can pivot about the pivot pin 20. The locating pins 18 are arranged in such a way that they engage in the blade openings 23a and thus allow the blade 23 to pivot about the pivot pin 20. Thus, via an angular rotation between the first toothed pulley 1 and the second toothed pulley 2, a desired knife pivot angle λ and cutting diameter Df can be set。

As can be seen in fig. 5 to 7, the second toothed belt 12 is converged by the deflection roller 5 and the tensioning roller 6. In this embodiment, the deflection roller 5 can be shifted in translation by a second motor 14 via the spindle 7 and via the first carriage 8. The second carriage 9 is connected to the first carriage 8 via a spring bolt 22 and a spring 15.

As shown in fig. 6, the symmetrical position of the apparatus 100 is defined as the position in which the distance D5 of the deflection roller 5 to the axis of symmetry Y is equal to the distance D6 of the tensioning roller 6 to the axis of symmetry Y. By loosening the screw 10a and rotating the fourth toothed pulley 4 relative to the third toothed pulley 3, the rotation of the first toothed pulley 1 relative to the second toothed pulley 2 can be caused without requiring a displacement of the deflection roller 5. Thus, the positioning pin 18 rotates about the rotation axis X and pivots the blade 23. The position of the blade 23 can thus be set in a symmetrical position in a simple manner.

Fig. 8a shows the blade in a position with a minimum cutting diameter Df.

Fig. 8b shows the blade in the adjustment position, in which the rotation of the second toothed pulley 2 relative to the first toothed pulley 1 is achieved by loosening the screw 10a and rotating the fourth toothed pulley 4 relative to the third toothed pulley 3, and the blade is thus closed to the adjustment cutting diameter Dj. In this position, the positioning pin 18 is rotated relative to the axis of symmetry Y by a so-called adjusting ring adjustment angle η, which then serves as a basis for the geometric relationship of the cutting diameter Df and the deflection roller displacement e.

Now, according to fig. 6, if the first carriage 8 with the deflection roller 5 is offset to the right from the symmetrical position and in the direction E, the second carriage 9 with the tensioning roller 6 is also offset to the right via the spring bolt 22 and the spring 15, so that the tensioning roller 6 is pressed against the second toothed belt 12. A horizontal displacement e of the deflection roller 5 to the right relative to the symmetrical position results in a rotation of the second toothed pulley 2 relative to the first toothed pulley 1. Since the adjustment ring and the positioning pin 18 are connected to the second toothed pulley 2, the positioning pin 18 is rotated relative to the tool flange and the pivot pin by a so-called adjustment ring rotation angle ψ. As shown in fig. 8c, the adjustment ring rotation angle psi and the adjustment ring adjustment angle η add up to the adjustment ring total angle phi. The blade 23 is pivoted by the locating pin 18 and produces a cutting diameter Df from the adjustment ring total angle phi. It is important to note that the adjusting ring rotation angle ψ is independent of the rotational speed of the toothed pulleys 1, 2 and that once the cutting diameter Df has been set, the toothed pulleys 1 and 2 rotate synchronously again. The setting of the adjusting ring rotation angle ψ therefore represents only the phase shift between the first toothed pulley 1 and the second toothed pulley 2 relative to the adjusting ring adjustment angle η.

Here the exact mathematical correlation between the amount e of horizontal deflection of the deflection roller 5 and the cutting diameter Df will not be derived anymore. The person skilled in the art will be able to derive such a correlation by trigonometric considerations without difficulty. It is only noted here that for the cut diameter Df it is possible to derive a correlation between e and Df.

It is important to note that the setting of the cutting diameter Df can take place by means of a rotating or non-rotating blade. With the device 100 it is thus possible to perform the above-described embodiment of the method according to the invention accurately and to form a predetermined breaking point in the shielding foil. Furthermore, the device 100 may comprise means for detecting contact of the tool with a conductive object (not shown here), such as for example a metal part of a shielding foil or shielding braid. Therefore, the predetermined breaking point can be formed even more accurately, and the shield braid can be ensured not to be damaged.

Fig. 9 shows a second preferred embodiment of a device 200 for supporting removal of a shielding foil of an electric cable according to the invention. Parts performing the same function as in the first embodiment are denoted by the same reference numerals herein. Unlike in the apparatus 100, the toothed pulleys 3 and 4 are not arranged coaxially. However, they can be driven synchronously with the deflection belt 30 by the same first motor 13, which first motor 13 allows the shaft 210 to rotate. As in the apparatus 100, the third toothed pulley 3 drives the first toothed pulley 1 via a first toothed belt 11 and the fourth toothed pulley 4 drives the second toothed pulley 2 via a second toothed belt 12. Thus, the first toothed pulley 1 and the second toothed pulley 2 rotate synchronously. However, in this embodiment, the toothed pulleys 1 and 2 are also rotatably mounted in an angularly adjustable manner relative to each other.

The deflection belt 30 is deflected with immovable deflection rollers 31c, 31d, wherein movable deflection rollers 31a and 31b are mounted on a carriage 32, which carriage 32 is movable in direction K by means of a movable spindle 33 and a rail 34. The main shaft 33 is driven by the second motor 14 and the motor belt 14a. Thanks to this mechanism, the distance between the axes of the movable deflecting rollers 31a, 31b can be adjusted to the axes of the immovable deflecting rollers 31c, 31d and to the axes of the third toothed pulley 3 and the fourth toothed pulley 4.

As is readily understood from fig. 9, the offset K of the movable deflection rollers 31a and 31b in the direction K with respect to the adjustment position results in a rotation of the first toothed pulley 1 with respect to the second toothed pulley 2. Since the positioning pin 18 (as can be seen in the apparatus 100 and in fig. 10) is connected to the second toothed pulley 2, the positioning pin 18 turns the so-called adjusting ring rotation angle ψ in a manner corresponding to the displacement k. As shown in fig. 8c, the adjustment ring rotation angle psi and the adjustment ring adjustment angle η sum to an adjustment ring total angle phi. The blade 23 is offset by the locating pin 18 and produces a cutting diameter Df from the adjustment ring total angle phi. It is important to note that the angle of rotation ψ here is also independent of the speed of rotation of the toothed pulley and that once the cutting diameter Df has been set, the toothed pulleys 1 and 2 rotate synchronously again. The setting of the adjusting ring rotation angle ψ therefore represents only the phase shift between the toothed pulleys 1 and 2 relative to the adjusting ring adjustment angle η.

Unlike in the apparatus 100, the adjustment ring adjustment angle η is set according to the position of the carriage 32. Around this adjustment position, the carriage is then offset in the direction K in order to set the cutting diameter Df via the adjustment ring rotation angle ψ. Another difference between the apparatus 100 and the apparatus 200 is the mathematical relationship between the displacement e of the deflection roller 5 or the offset k of the movable deflection rollers 31a, 31b and the adjusting ring rotation angle ψ. Although in the case of apparatus 100 there is a non-linear relationship between deflection roller offset e and adjusting ring rotation angle ψ, in the case of apparatus 200 there is a purely linear relationship between deflection roller offset k and adjusting ring rotation angle ψ.

If one of the deflection rollers 31a, 31b is designed as a tension roller (which is preferably 31b), since the deflection roller driven in translation should be placed as close as possible to the third toothed pulley 3 and the fourth toothed pulley 4 in order to minimize the cutting diameter error by stretching of the deflection belt. Preferably, the sections of the deflecting belt 30 between the third toothed pulley 3 and the movable deflecting roller 31a and between the fourth toothed pulley 4 and the movable deflecting roller 31a extend parallel to each other.

The exact mathematical relationship between k and the adjusting ring rotation angle psi will not be derived anymore here. The person skilled in the art can derive this correlation without difficulty by trigonometric considerations. In the case of the device 200, it is possible to derive a correlation between k and Df, just as in the case of the device 100.

It is important to note that the deflection rollers 31b, 31c and 31d may be positioned differently than shown in fig. 9 without affecting the function of the apparatus 200. But it is important that these rollers assume the function of a length compensation mechanism. When the movable deflection roller 31a moves, one or more of the deflection rollers 31b, 31c and 31d must be correspondingly deflected in order to maintain the tension of the deflection belt 30. In particular, it must be ensured that the movement of the movable deflection roller 31a does not cause the deflection belt 30 to tear.

It is important to note that the setting of the cutting diameter Df here can also be performed by a rotating or non-rotating blade. Thus, with the device 200 it is also possible to perform the above-described embodiment of the method according to the invention accurately and to form the predetermined breaking point in the shielding foil. Furthermore, the device 200 may comprise means for detecting contact of the tool with a conductive object (not shown here), such as for example a metal part of a shielding foil or shielding braid. Therefore, the predetermined breaking point can be formed even more accurately, and the shield braid can be ensured not to be damaged.

Fig. 11 shows a third preferred embodiment of a device 300 according to the present invention. In this embodiment, the angular rotation of the toothed pulleys 1 and 2, which are otherwise rotating synchronously, and thus the position of the positioning pin 18 relative to the pivot pin 20 and thus the cutting diameter Df, is achieved with the planetary gear arrangement 50. The mechanism for pivoting of the blade with the locating pin 18 is in this embodiment the same as in the first and second embodiments. As can be seen in fig. 12, the fourth toothed pulley 4 is driven by a first motor 13 with a first motor-driven belt 13a. As such, the fourth toothed pulley 4 drives the second toothed pulley 2 by means of the second toothed belt 12. The third toothed pulley 3 drives the first toothed pulley 1 by means of the first toothed belt 11.

As can be seen in fig. 12, the fourth toothed pulley 4 is connected to a hollow body 55 having internal teeth 55a. Furthermore, inside the hollow body 55 there is a planetary gear 50 connected to the internal teeth 55a, which planetary gear 50 has planetary wheels 51 and a sun wheel 52. With the sun wheel 52 stationary, the planet wheels 51 revolve around the sun wheel 52 in the same direction of rotation as the fourth toothed pulley 4, due to the rotation of the fourth toothed pulley 4 and the hollow body 55 with its internal teeth 55a. The revolution of the planet wheels 51 drives a shaft 53 connected to the third toothed pulley 3. The number of teeth or the diameter of the third toothed pulley 3 is selected such that the first toothed pulley 1 and the second toothed pulley 2 rotate synchronously with the fixed sun gear, respectively.

With the second motor 14, the fifth toothed pulley 54 connected to the sun gear 52 can be driven via the second motor drive belt 14a. Thus, the rotation of the fifth toothed pulley 54 by the angle β results in the rotation of the sun gear 52. Rotation of the sun wheel 52 in the same direction as the fourth toothed pulley 4 results in a faster revolution of the planet wheels 51 and thus a faster rotation of the shaft 53 and the third toothed pulley 3. Since the third toothed pulley 3 drives the first toothed pulley 1, the rotation of the toothed pulleys 1, 2 and the adjustment ring rotation angle ψ are thus effected as the sun gear 52 rotates by the angle β. As in the previously described preferred embodiment, the above described mechanism produces the phase shift ψ and the adjustment of the position of the blade 23. It is important to note that the adjusting ring rotation angle ψ is here also independent of the rotational speed of the toothed pulleys 1, 2 and that once the second motor and the sun wheel are stationary and the cutting diameter Df is thus set, the toothed pulleys 1 and 2 rotate synchronously again. The setting of the adjusting ring rotation angle ψ therefore represents only a phase shift relative to the adjustment position.

Also here, the exact mathematical relationship between the rotation angle β of the sun wheel 52 and the cutting diameter Df will not be derived anymore. The person skilled in the art can derive this correlation without difficulty by trigonometric considerations. It is only noted here that it is also possible to derive a correlation between S and Df. Instead of driving the sun wheel 52 via the fifth toothed pulley 54, it can also be driven directly via a geared motor.

It is important to note that the setting of the cutting diameter Df here can also be performed by a rotating or non-rotating blade. Thus, with the device 300 it is also possible to perform the above-described embodiments of the method according to the invention accurately and to form predetermined breakpoints in the shielding foil. Furthermore, the device 300 may comprise means for detecting contact of the tool with a conductive object (not shown here), such as for example a metal part of a shielding foil or shielding braid. Therefore, the predetermined breaking point can be formed even more accurately, and the shield braid can be ensured not to be damaged.

Those skilled in the art will readily appreciate that the blades 23 of the apparatus 100, 200 and 300 could readily be replaced by piercing needles. The perforating needles will make perforation of the shielding foil possible and thus form predetermined breaking points.

It should also be noted that although in the embodiment presented here the distance of the blade 23 with respect to the axis of rotation X is set by means of a pivoting mechanism, a person skilled in the art can of course use other known closing or opening mechanisms within the scope of the invention. In particular, those skilled in the art will recognize that a helical flange can be readily used for this purpose. The helical flange will be particularly advantageous for enabling the blade 23 to be radially displaced with respect to the rotation axis X.

Fig. 13 shows a removal device 400, which removal device 400 can be used for tearing and removal of the shielding foil after a predetermined breaking point S has been formed. The removal device 400 has a first clamping jaw 401 and a second clamping jaw 402 for clamping the cable. As can be seen from fig. 13, the clamping pincers 401,402 are mounted in a rotating manner about axes FA and GA. The clamping jaws 401,402 are thus mounted on a gimbal suspension. The removal apparatus 400 further comprises a foot 407 by means of which foot 407 the first frame 403 of the gimbal suspension can be connected to means for translational and rotational movement (not shown here). Thus, the entire removal apparatus 400 may be offset in translation along the directions MA, NA, and GA, and rotated in the rotational direction PA.

As shown in fig. 14, the clamping pincers 401,402 are mounted on two pressure pistons 404. With compressed air connections 401a, 401b, 402a, 402b, compressed air can be admitted in order to adjust the position of the clamping pincers 401,402 along the axis FA. It can be seen from this figure that the clamping jaws 401 and 402 have separate compressed air connections 401a, 401b, 402a, 402b. The removal device also has torsion springs 405 around the axes GA and FA between the first frame 403 and the feet 407 and between the second frame 408 and the first frame 403. With the torsion spring 405 it is ensured that the first frame 403 and the second frame 408 in the rest position (i.e. before clamping the cable with the clamping pincers) are aligned perpendicular to the longitudinal axis L. The removal device may have a hydraulic drive instead of a compressed air drive. The clamping jaws in a gimbal suspension are preferably driven with a flow diverter (e.g., a dual piston actuator) or with counter-rotating spindles. The clamping jaws are therefore always driven symmetrically with respect to the longitudinal axis.

Fig. 15 shows a detailed view of the clamping jaws 401 and 402 of the removal device 400. In this embodiment the surfaces of the clamping jaws 401,402 that are in contact with the cable have a structure that increases the static friction. Thus, the cable can be better clamped so that the removal process occurs without cable slippage.

It is to be noted here that the invention is not limited to the described embodiments. It will be clear to a person skilled in the art that further developments and modifications are absolutely possible within the scope of the invention as protected. The elements of the apparatus may be replaced with other elements serving the same or similar function, as desired. Additional devices and elements may also be provided. These and other measures and elements fall within the scope of the invention as defined by the claims.

List of reference numerals

1. First toothed belt wheel

2. Second toothed belt wheel

3. Third toothed belt wheel

4. Fourth toothed belt wheel

5. Deflection roller

6. Tension roller

7. Main shaft

8. First carriage

9. Second carriage

10. Drive shaft

11. First toothed belt

12. Second toothed belt

13. Drive device, first motor

First motor drive belt 13a

14. Second motor

Second motor drive belt 14a

15. Spring

16. Bearing sleeve

17. Adjusting ring

18. Setting device, positioning pin

19. Rotor

20. Pivot pin

21. Tool flange

22. Spring bolt

23. Tool with a locking mechanism

25. Exhaust pipe

30. Deflection belt

31a. first movable deflection roller

Second movable deflection roller, movable tensioning roller

31c. first immovable deflection roller

31d. second immovable deflection roller

32. Sliding rack

33. Main shaft

34. Track

50. Planetary gear device

51. Planet wheel

52. Sun wheel

53. Shaft

54. Fifth toothed belt wheel

55. Hollow body

Internal teeth of hollow bodies, ring gears

100. Apparatus according to the first embodiment

200. Apparatus according to the second embodiment

300. Apparatus according to a third embodiment

400. Removing device

401,402 clamping pincers

401a, 401b, 402a, 402b compressed air connection

403. First frame

404. Pressure piston

405. Torsion spring

406. Surface of clamping pliers

407. Supporting leg

408. Second frame

Lambda knife pivot angle

Eta regulating angle by regulating ring

Psi. angle of rotation of adjusting ring

Total angle of adjusting ring

Ka. Cable

K1. Insulating sheath

K2. Shielding foil

K3. Shielding braid

K4. Dielectric medium

K5. Inner conductor

EK. cut-out in cable

L. longitudinal axis of cable

S. a predetermined break in the shielding foil.