阅读说明：本技术 密封焊切割工具 (Sealing welding cutting tool ) 是由 田荣 袁林涛 李勇 宋水 刘坤 李淮伟 孙来战 于 2021-09-30 设计创作，主要内容包括：本发明涉及密封焊切割工具,包括刀架、转动机构、进给机构以及抱紧机构,刀架的轴线方向沿第一方向,刀架的一端设置有组合刀具,组合刀具与刀架的轴线沿第二方向间隔设置,第一方向与第二方向垂直,转动机构设置在刀架上,进给机构设置在刀架远离组合刀具的一端抱紧机构设置在转动机构远离进给机构的一侧。在用于切割指套管和止推环之间的密封焊时,抱紧机构将指套管和止推环的位置固定,刀架设置在转动机构上,同时,抱紧机构与转动机构连接,即密封焊的切割位置与刀架位置相对固定,刀架上的组合刀具沿轴线匀速转动对密封焊进行切割,切割过程中不易发生晃动,切割精度高；且被切割表面光滑,无需再次打磨,切割后的止推环可以重复利用。(The invention relates to a seal welding cutting tool, which comprises a tool rest, a rotating mechanism, a feeding mechanism and a holding mechanism, wherein the axis direction of the tool rest is along a first direction, a combined tool is arranged at one end of the tool rest, the combined tool and the axis of the tool rest are arranged at intervals along a second direction, the first direction is vertical to the second direction, the rotating mechanism is arranged on the tool rest, and the holding mechanism is arranged at one end of the tool rest, which is far away from the combined tool, on one side of the rotating mechanism, which is far away from the feeding mechanism. When the cutting tool is used for cutting the seal welding between the finger sleeve and the thrust ring, the holding mechanism fixes the positions of the finger sleeve and the thrust ring, the tool rest is arranged on the rotating mechanism, meanwhile, the holding mechanism is connected with the rotating mechanism, namely, the cutting position of the seal welding is relatively fixed with the position of the tool rest, the combined tool on the tool rest rotates at a constant speed along the axis to cut the seal welding, the cutting process is not easy to shake, and the cutting precision is high; and the cut surface is smooth, the secondary grinding is not needed, and the cut thrust ring can be recycled.)

1. A seal weld cutting tool for cutting a seal weld location of a work piece to be cut, the seal weld cutting tool comprising:

the axis direction of the tool rest is along a first direction, one end of the tool rest is provided with a combined tool, the combined tool and the axis of the tool rest are arranged at intervals along a second direction, and the first direction is perpendicular to the second direction;

the rotating mechanism is arranged on the tool rest and used for driving the tool rest to rotate around the axis of the tool rest;

the feeding mechanism is arranged on one side of the tool rest, which is far away from the combined tool, and is used for pushing the tool rest to move along a first direction; and

and the holding mechanism is connected with the rotating mechanism, is positioned on one side of the rotating mechanism far away from the feeding mechanism and is used for clamping the piece to be cut.

2. The seal weld cutting tool of claim 1, wherein the rotation mechanism comprises:

the shaft sleeve is sleeved outside the tool rest, a connecting groove is formed in the shaft sleeve, and the tool rest is in sliding fit with the connecting groove along a first direction;

the connecting groove is used for preventing the shaft sleeve and the tool rest from rotating relatively, so that the shaft sleeve can drive the tool rest to rotate synchronously when rotating.

3. The seal weld cutting tool of claim 2, wherein the coupling slot is non-circular in cross-section and the tool holder has a cross-sectional shape that is complementary to the cross-sectional shape of the coupling slot.

4. The seal weld cutting tool of claim 2, wherein the rotation mechanism comprises:

the driven bevel gear is sleeved outside the shaft sleeve and used for driving the shaft sleeve to rotate around the axis of the tool rest;

a driving bevel gear engaged with the driven bevel gear;

and the output end of the driving piece is connected with the driving bevel gear and is used for driving the driving bevel gear to rotate.

5. The seal weld cutting tool of claim 2, wherein the feed mechanism includes:

the second shell is connected with the rotating mechanism, and the length direction of the second shell is along the first direction; and

the rotating wheel is arranged in the second shell and in threaded transmission fit with the second shell, so that the rotating wheel can push the tool rest along a first direction when rotating relative to the second shell.

6. The seal weld cutting tool of claim 5,

the seal welding and cutting tool further comprises a limiting rod, one end of the limiting rod is fixed with the rotating wheel, and the other end of the limiting rod penetrates through the tool rest;

and a limiting structure is arranged in the tool rest, and the limiting rod is matched with the limiting structure and used for preventing the rotating wheel from being separated from the tool rest.

7. The seal weld cutting tool of claim 6,

the tool rest is sequentially provided with a first hole and a second hole along a first direction, the diameter of the first hole is larger than that of the second hole, a step surface is formed at the joint of the hole wall of the first hole and the hole wall of the second hole, and the limiting structure comprises the step surface;

the limiting rod comprises a rod body and a joint which are sequentially arranged along a first direction, and the diameter of the joint is larger than that of the rod body; one end of the rod body penetrates through the second hole, the other end of the rod body is fixed with the rotating wheel, and the joint is arranged in the first hole and matched with the step surface.

8. The seal weld cutting tool of any one of claims 1-7, wherein the clasping mechanism comprises:

the mounting seat is connected with the rotating mechanism;

a seat cover disposed on the mounting seat and having an inner diameter gradually decreasing along a direction in which the seat cover approaches the rotating mechanism, and

the expansion sleeve can be arranged in the seat sleeve in a penetrating mode and used for tightly holding a to-be-cut piece, and the expansion sleeve is provided with a first position and a second position;

when the cutting tool is in the first position, the expansion sleeve is positioned close to one end, with the smaller inner diameter, of the seat sleeve, the seat sleeve clamps the expansion sleeve, the expansion sleeve contracts, and the expansion sleeve clasps a to-be-cut piece;

when the cutting tool is in the second position, the expansion sleeve is located at the end, close to the seat sleeve, with the larger inner diameter, the seat sleeve releases the expansion sleeve, the expansion sleeve is expanded, and the expansion sleeve releases a to-be-cut part.

9. The seal weld cutting tool of claim 8, wherein the clasping mechanism further comprises:

the end cover is arranged on one side, away from the rotating mechanism, of the seat cover, and the first end of the end cover is rotatably connected to the mounting seat; and

the pushing assembly is connected with the end cover and used for driving the end cover to rotate relative to the mounting seat so as to open and close the end cover;

when the pushing assembly drives the end cover to be switched from the open state to the closed state, the end cover extrudes the expansion sleeve, so that the expansion sleeve is switched from the second position to the first position.

10. The seal weld cutting tool of claim 9, wherein the end cap defines a through hole, the clasping mechanism further comprising:

the clamping ring, the clamping ring is worn to establish in the through-hole, and with end cover fixed connection, one side that the clamping ring is close to the tight cover that expands is provided with the bellying, the internal diameter of clamping ring is greater than the maximum external diameter of waiting to cut the thing, the internal diameter of clamping ring is less than the maximum external diameter of the tight cover that expands.

11. The seal weld cutting tool of claim 9, wherein the end cap has a second end thereon opposite the first end, the pushing assembly comprising:

one end of the pull rod is rotatably connected with the mounting seat;

and one end of the connecting rod is rotatably connected to the second end of the end cover, and the other end of the connecting rod is rotatably connected with the middle part of the pull rod.

12. The seal-welding cutting tool of claim 8, wherein the gang tool extends into the mount, the seal-welding cutting tool further comprising a dust suction mechanism disposed on the mount.

13. The seal weld cutting tool of claim 1, further comprising a noise dampener disposed on the rotational mechanism.

Technical Field

The invention relates to the technical field of sealing welding and cutting tools, in particular to a sealing welding and cutting tool.

Background

The CPR1000 reactor type fingerstall mainly provides a channel for a reactor core neutron measurement probe, wherein the outside of the fingerstall is sleeved with a thrust ring and an extension section, one end of the fingerstall inserted into the thrust ring is connected with the thrust ring through seal welding, and the thrust ring is connected with the extension section through butt welding. During the operation of the unit, the finger sleeve is influenced by vibration and continuously contacts with external supporting structures such as a supporting column to cause abrasion, and in order to avoid standard exceeding abrasion of the finger sleeve, the finger sleeve needs to be continuously cut and shifted to establish a new abrasion point, namely, a tube cutting and shifting process.

In the prior art, the cutting and polishing work of seal welding between the finger sleeve and the thrust ring is completed by manual operation, and the personnel error is large, so that the thrust ring after cutting cannot be reused.

Disclosure of Invention

Therefore, it is necessary to provide a seal welding cutting tool for solving the problem of large error caused by manual seal welding cutting.

A seal weld cutting tool for cutting a seal weld location of a work piece to be cut, the seal weld cutting tool comprising:

the axis direction of the tool rest is along a first direction, one end of the tool rest is provided with a combined tool, the combined tool and the axis of the tool rest are arranged at intervals along a second direction, and the first direction is perpendicular to the second direction;

the rotating mechanism is arranged on the tool rest and used for driving the tool rest to rotate around the axis of the tool rest;

the feeding mechanism is arranged on one side of the tool rest, which is far away from the combined tool, and is used for pushing the tool rest to move along a first direction; and

and the holding mechanism is connected with the rotating mechanism, is positioned on one side of the rotating mechanism far away from the feeding mechanism and is used for clamping the piece to be cut.

In one embodiment, the rotation mechanism includes:

the shaft sleeve is sleeved outside the tool rest, a connecting groove is formed in the shaft sleeve, and the tool rest is in sliding fit with the connecting groove along a first direction;

the connecting groove is used for preventing the shaft sleeve and the tool rest from rotating relatively, so that the shaft sleeve can drive the tool rest to rotate synchronously when rotating.

In one embodiment, the cross section of the connecting groove is non-circular, and the cross section shape of the tool holder is matched with the cross section shape of the connecting groove.

In one embodiment, the rotation mechanism includes:

the driven bevel gear is sleeved outside the shaft sleeve and used for driving the shaft sleeve to rotate around the axis of the tool rest;

a driving bevel gear engaged with the driven bevel gear;

and the output end of the driving piece is connected with the driving bevel gear and is used for driving the driving bevel gear to rotate.

In one embodiment, the feeding mechanism comprises:

the second shell is connected with the rotating mechanism, and the length direction of the second shell is along the first direction; and

the rotating wheel is arranged in the second shell and in threaded transmission fit with the second shell, so that the rotating wheel can push the tool rest along a first direction when rotating relative to the second shell.

In one embodiment, the seal welding and cutting tool further comprises a limiting rod, one end of the limiting rod is fixed with the rotating wheel, and the other end of the limiting rod penetrates through the tool rest;

and a limiting structure is arranged in the tool rest, and the limiting rod is matched with the limiting structure and used for preventing the rotating wheel from being separated from the tool rest.

In one embodiment, the tool rest is sequentially provided with a first hole and a second hole along a first direction, the diameter of the first hole is larger than that of the second hole, a step surface is formed at the joint of the hole wall of the first hole and the hole wall of the second hole, and the limiting structure comprises a step surface;

the limiting rod comprises a rod body and a joint which are sequentially arranged along a first direction, and the diameter of the joint is larger than that of the rod body; the rod body penetrates through the second hole, and the joint is arranged in the first hole and matched with the step surface.

In one embodiment, the clasping mechanism comprises:

the mounting seat is connected with the rotating mechanism;

a seat cover disposed on the mounting seat and having an inner diameter gradually decreasing along a direction in which the seat cover approaches the rotating mechanism, and

the expansion sleeve can be arranged in the seat sleeve in a penetrating mode and used for tightly holding a to-be-cut piece, and the expansion sleeve is provided with a first position and a second position;

when the cutting tool is in the first position, the expansion sleeve is positioned close to one end, with the smaller inner diameter, of the seat sleeve, the seat sleeve clamps the expansion sleeve, the expansion sleeve contracts, and the expansion sleeve clasps a to-be-cut piece;

when the cutting tool is in the second position, the expansion sleeve is located at the end, close to the seat sleeve, with the larger inner diameter, the seat sleeve releases the expansion sleeve, the expansion sleeve is expanded, and the expansion sleeve releases a to-be-cut part.

In one embodiment, the clasping mechanism further comprises:

the end cover is arranged on one side, away from the rotating mechanism, of the seat cover, and the first end of the end cover is rotatably connected to the mounting seat; and

the pushing assembly is connected with the end cover and used for driving the end cover to rotate relative to the mounting seat so as to open and close the end cover;

when the pushing assembly drives the end cover to be switched from the open state to the closed state, the end cover extrudes the expansion sleeve, so that the expansion sleeve is switched from the second position to the first position.

In one embodiment, a through hole is opened on the end cover, and the clasping mechanism further comprises:

the clamping ring, the clamping ring is worn to establish in the through-hole, and with end cover fixed connection, one side that the clamping ring is close to the tight cover that expands is provided with the bellying, the internal diameter of clamping ring is greater than the maximum external diameter of waiting to cut the thing, the internal diameter of clamping ring is less than the maximum external diameter of the tight cover that expands.

In one embodiment, the end cap has a second end thereon opposite the first end, and the push assembly comprises:

one end of the pull rod is rotatably connected with the mounting seat;

and one end of the connecting rod is rotatably connected to the second end of the end cover, and the other end of the connecting rod is rotatably connected with the middle part of the pull rod.

In one embodiment, the gang tool extends into the mounting seat, and the seal welding and cutting tool further comprises a dust suction mechanism disposed on the mounting seat.

In one embodiment, the seal cutting tool further comprises a silencer disposed on the rotating mechanism.

Foretell seal welding cutting means, through setting up the knife rest, slewing mechanism, feed mechanism and enclasping mechanism, will wait to cut a tight clamp through enclasping mechanism, so that the seal welding position of waiting to cut a tight is relative with the cutter position on the knife rest, slewing mechanism rotates and then drives the knife rest and rotates, thereby make gang tool can carry out rotary cutting to seal welding, feed mechanism is used for following first direction promotion knife rest simultaneously, and then make the knife rest can drive gang tool and stretch into to seal welding along first direction in, the amount of movement through control knife rest and then can control gang tool's cutting depth.

When the cutting tool is used for cutting the seal welding between the finger sleeve and the thrust ring, the holding mechanism fixes the positions of the finger sleeve and the thrust ring, the rotating mechanism is arranged on the tool rest, and meanwhile, the holding mechanism is connected with the rotating mechanism, namely, the holding mechanism is relatively fixed with the tool rest, the cutting position of the seal welding is relatively fixed with the tool rest, the cutting process is not easy to shake, and the cutting precision is high; and because the rotating mechanism rotates at a constant speed, the cut surface is smooth, secondary grinding is not needed, and the cut thrust ring can be reused.

Drawings

FIG. 1 is a schematic view of an exemplary seal welding and cutting tool (with the first housing removed);

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 (with a first housing);

FIG. 3 is an exploded view of the clasping mechanism;

fig. 4 is a state view of the pushing mechanism when the mount is opened.

Reference numerals: 100-a tool holder; 110-gang tool; 111-a cutting knife;

200-a rotation mechanism; 210-a shaft sleeve; 211-connecting grooves; 220-driven bevel gear; 230-drive bevel gear; 240-a drive member; 250-a first housing;

300-a feed mechanism; 310-a second housing; 320-a rotating wheel; 330-hand wheel;

410-a limiting rod; 412-a rod body; 413-linker; 431-a first hole; 432-a second well;

600-a clasping mechanism; 610-a mounting seat; 611-dust suction means; 620-seat cover; 630-expanding sleeve; 640-an end cap; 650-a pushing assembly; 651-a pull rod; 652-connecting rod; 660-compression ring;

710-a thrust ring; 711-large diameter section; 712-small diameter section; 720-finger sleeve;

800-silencer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2, an embodiment of the present invention provides a seal welding cutting tool for cutting a seal welding position of a workpiece to be cut, and the seal welding cutting tool includes a tool post 100, a rotating mechanism 200, a feeding mechanism 300, and a clasping mechanism 600.

Referring to fig. 3, wherein the article to be cut may be a sleeve 720 and a thrust ring 710, thrust ring 710 includes a large diameter section 711 and a small diameter section 712, sleeve 720 is inserted into thrust ring 710, and one end of sleeve 720 is flush with small diameter section 712 of thrust ring 710 and is welded by a seal weld, the seal weld cutting tool needs to cut the seal weld between sleeve 720 and thrust ring 710 to separate sleeve 720 and thrust ring 710.

The axial direction of the tool holder 100 is along a first direction, one end of the tool holder 100 is provided with a combined tool 110, the combined tool 110 and the axial line of the tool holder 100 are arranged at intervals along a second direction, and the first direction is perpendicular to the second direction. That is, the combination tool 110 is eccentrically disposed, and when the tool holder 100 is rotated, the movement path of the combination tool is circular, i.e., the annular seal weld between the thimble 720 and the thrust ring 710 is cut. The rotating mechanism 200 is arranged on the tool holder 100, the feeding mechanism 300 is arranged at one end of the tool holder 100 far away from the combined tool 110, and the clasping mechanism 600 is arranged at one side of the rotating mechanism 200 far away from the feeding mechanism 300.

In this embodiment, by providing the tool post 100, the rotating mechanism 200, the feeding mechanism 300 and the clasping mechanism 600, the to-be-cut piece is clamped tightly by the clasping mechanism 600, so that the seal welding position of the to-be-cut piece is opposite to the position of the tool on the tool post 100, the rotating mechanism 200 rotates and then drives the tool post 100 to rotate, so that the combined tool 110 can perform rotary cutting on the seal welding, meanwhile, the feeding mechanism 300 is used for pushing the tool post 100 along the first direction, so that the tool post 100 can drive the combined tool 110 to extend into the seal welding along the first direction, and the cutting depth of the combined tool 110 can be controlled by controlling the movement amount of the tool post 100.

When the cutting tool is used for cutting the seal welding between the finger sleeve 720 and the thrust collar 710, the holding mechanism 600 fixes the positions of the finger sleeve 720 and the thrust collar 710, the rotating mechanism 200 is arranged on the tool holder 100, and meanwhile, the holding mechanism 600 is connected with the rotating mechanism 200, namely, the holding mechanism 600 is relatively fixed with the tool holder 100, the cutting position of the seal welding is relatively fixed with the tool holder 100, the cutting process is not easy to shake, and the cutting precision is high; and because the rotating mechanism 200 rotates at a constant speed, the cut surface is smooth, the cutting does not need to be polished again, and the cut thrust ring 710 can be reused.

Referring to fig. 2, in some embodiments, the rotating mechanism 200 includes a shaft sleeve 210, the shaft sleeve 210 is disposed on the exterior of the tool holder 100, a connecting groove 211 is disposed in the shaft sleeve 210, and the tool holder 100 is slidably engaged with the connecting groove 211 along a first direction, that is, when the feeding mechanism 300 pushes the tool holder 100, the tool holder 100 can drive the gang tool 110 to move along the first direction, so as to change the cutting depth. Meanwhile, the connecting slot 211 is used to prevent the shaft sleeve 210 and the tool holder 100 from rotating relatively, so that the shaft sleeve 210 can drive the tool holder 100 to rotate synchronously when rotating.

In the present embodiment, the rotating mechanism 200 and the feeding mechanism 300 can act on the tool holder 100 independently, and the movement modes of the two do not affect each other. The distance between the gang tool 110 and the work piece to be cut can be conveniently adjusted by adjusting only the feed mechanism 300, thereby moving the tool holder 100 in the first direction, before cutting. During cutting, while the rotating mechanism 200 drives the tool post 100 to rotate, the feeding mechanism 300 pushes the tool post 100 and further pushes the combined tool 110 to extend into the sealing weld, so as to realize cutting of the sealing weld.

In some of these embodiments, the cross-section of the attachment slot 211 is non-circular, and the cross-sectional shape of the tool holder 100 is adapted to the cross-sectional shape of the attachment slot 211. One end of the tool holder 100 is inserted into the connecting groove 211, one end of the tool holder 100, which is located in the connecting groove 211, can slide in the connecting groove 211, and meanwhile, the shaft sleeve 210 can drive the tool holder 100 to rotate when rotating, specifically, the cross section of the connecting groove 211 and the cross section of the tool holder 100 can be both rectangular or triangular.

Referring to fig. 1 and 2, in some embodiments, the rotating mechanism 200 further includes a driven bevel gear 220, a drive bevel gear 230, a driver 240, and a first housing 250. The driven bevel gear 220 is sleeved outside the shaft sleeve 210 and used for driving the shaft sleeve 210 to rotate around the axis of the tool holder 100; the drive bevel gear 230 is engaged with the driven bevel gear 220; one end of the driving member 240 is connected to the drive bevel gear 230 for driving the drive bevel gear 230 to rotate; the drive bevel gear 230 and the driven bevel gear 220 are both disposed within the first housing 250.

In the present embodiment, since the drive bevel gear 230 and the driven bevel gear 220 are vertically disposed, the first housing 250 has a T-shape, and both sides of the bushing 210 in the first direction are respectively coupled to the first housing 250 through bearings. The driving member 240 is fixed in the first housing 250.

Referring to fig. 2, in some embodiments, the feeding mechanism 300 includes a second housing 310 and a rotating wheel 320, the second housing 310 is connected to the rotating mechanism 200, specifically, the second housing 310 is fixedly connected to the first housing 250, and a length direction of the second housing 310 is along a first direction. The rotating wheel 320 is disposed in the second housing 310, the rotating wheel 320 is in threaded driving engagement with the second housing 310, and the tool holder 100 can be pushed in a first direction when the rotating wheel 320 rotates relative to the second housing 310.

In this embodiment, a handwheel 330 is disposed at an end of the rotating wheel 320 away from the first housing 250, and the rotating wheel 320 is driven to rotate and advance in the second housing 310 by rotating the handwheel 330, so as to push the tool holder 100 in the first direction.

In other embodiments, the feed mechanism may also be another telescopic mechanism, such as a cylinder having a piston end for sliding the tool holder along the length of the connecting slot.

In some embodiments, the seal welding and cutting tool further includes a limiting rod 410, one end of the limiting rod 410 is fixed to the rotating wheel 320, and the other end thereof is inserted into the tool holder 100; a limiting structure is arranged in the tool holder 100, and the limiting rod 410 is matched with the limiting structure and used for preventing the rotating wheel 320 from being separated from the tool holder 100.

Further, the limiting structure comprises a first hole 431 and a second hole 432 which are sequentially arranged along the first direction, and the diameter of the first hole 431 is larger than that of the second hole 432; the connection between the hole wall of the first hole 431 and the hole wall of the second hole 432 forms a step surface, and the limiting structure comprises the step surface. The limiting rod 410 comprises a rod body 412 and a joint 413 which are sequentially arranged along a first direction, and the diameter of the joint 413 is larger than that of the rod body 412; the rod 412 is disposed through the second hole 432, and the joint 413 is disposed in the first hole 431 and engaged with the step surface.

In this embodiment, one end of the rod 412 penetrates through the second hole 432 and is fixed to the wheel 320, and when the wheel 320 rotates, the rod 412 is driven to rotate in the second hole 432, and the joint is driven to rotate in the first hole 431. Therefore, when the rotating wheel 320 moves along the first direction, the limiting rod 410 and the tool holder 100 both move synchronously along the first direction, i.e. the limiting rod 410 always connects the rotating wheel 320 with the tool holder 100, which can prevent the rotating wheel 320 from separating from the tool holder 100, thereby increasing the stability of the structure.

Referring to fig. 2 and 3, in some embodiments, the clasping mechanism 600 includes a mounting seat 610, a seat cover 620, and an expansion sleeve 630. The mount pad 610 is connected with the first housing 250 of the rotating mechanism 200 through a bolt, that is, the clasping mechanism 600 is connected with the rotating mechanism 200 as a whole, so that the object to be cut and the combined cutting tool 110 can be prevented from shaking in the cutting process, and the cutting precision can be enhanced.

The seat cover 620 is disposed on the mounting seat 610, and the inner diameter of the seat cover 620 gradually decreases along a direction in which the seat cover 620 approaches the rotating mechanism 200, and specifically, the seat cover 620 is disposed on a side of the mounting seat 610 away from the rotating mechanism 200.

The expansion sleeve 630 can be arranged in the seat sleeve 620 in a penetrating mode and used for holding the workpiece to be cut tightly. The expansion sleeve 630 has a first position and a second position. In the first position, the expansion sleeve 630 is positioned close to the end, with the smaller inner diameter, of the sleeve 620, the sleeve 620 clamps the expansion sleeve 630, the expansion sleeve 630 contracts, and the expansion sleeve 630 clasps the workpiece to be cut; in the second position, the expansion sleeve 630 is located near the end of the sleeve 620 with the larger inner diameter, the sleeve 620 releases the expansion sleeve 630, the expansion sleeve 630 expands, and the expansion sleeve 630 releases the workpiece to be cut.

Specifically, the outer diameter of the expansion sleeve 630 is trapezoidal along the cross section of the first direction, the expansion sleeve 630 comprises a plurality of movable arms, the plurality of movable arms are sequentially arranged along the circumferential direction of the expansion sleeve, one end of each movable arm is fixed, and the other end of each movable arm can move along the radial direction of the expansion sleeve, so that the expansion sleeve 630 is opened or tightened. In the first position, the expansion sleeve 630 extends completely into the sleeve 620, the movable arms are compressed by the sleeve 620 and then contract, and the inner diameter becomes smaller, so that the belt-cutting object can be clamped. When in the second position, a part of the expansion sleeve 630 extends out of the seat sleeve 620, the compression effect of the seat sleeve 620 on the expansion sleeve 630 is reduced, the movable arms are opened when in the first position, namely, the inner diameter of the expansion sleeve 630 is enlarged, and the expansion sleeve 630 has no clamping effect on the workpiece to be cut.

In some embodiments, the clasping mechanism 600 further comprises an end cap 640 and a pushing assembly 650, the end cap 640 is disposed on a side of the seat cover 620 away from the rotating mechanism 200, and a first end of the end cap 640 is rotatably connected to the mounting seat 610. The pushing assembly 650 is coupled to the end cap 640 for pivoting about a first end of the end cap 640 to effect opening and closing of the end cap 640. When the pushing assembly 650 moves the end cap 640 from the open state to the closed state, the end cap 640 presses the expansion sleeve 630, so that the expansion sleeve 630 is switched from the second position to the first position.

In actual use, the end cap 640 is first opened, and the expansion sleeve 630 is not fully inserted into the sleeve 620, i.e., the expansion sleeve 630 is in the second position. The object to be cut is inserted into the clasping mechanism 600, then the pushing assembly 650 drives the end cover 640 to rotate and close the end cover 640, that is, the expansion sleeve 630 is switched to the first position, and during the closing process of the end cover 640, the end cover 640 presses the expansion sleeve 630, so that the expansion sleeve 630 contracts, and the object to be cut is clamped.

Further, seted up the through-hole on the end cover 640, hold tightly mechanism 600 still includes clamping ring 660, and clamping ring 660 wears to establish in the through-hole, and fixed with end cover 640, and one side that clamping ring 660 is close to the tight cover 630 that expands is provided with the bellying, can extrude the tight cover 630 that expands through the bellying. When using, because the internal diameter of clamping ring 660 is greater than the biggest external diameter of waiting to cut the thing, the internal diameter of clamping ring 660 is less than the biggest external diameter of bloated tight cover 630, and the seal welding cutting means of this application can realize online installation and cutting promptly, during the installation, only need with waiting to cut the thing and directly pass the clamping ring 660 and go deep into to the tight cover 630 from one side of seal welding cutting means, then close end cover 640 through promotion subassembly 650, can accomplish the installation. When the pushing assembly 650 closes the end cap 640, the end cap 640 drives the pressing ring 660 to press the expansion sleeve 630, so that the expansion sleeve 630 is tightened.

Referring to fig. 4, in particular, the end cap 640 has a second end, the first end and the second end are respectively located at two opposite sides of the end cap 640, the pushing assembly 650 includes a pull rod 651 and a connecting rod 652, and one end of the pull rod 651 is rotatably connected to the mounting base 610; one end of the link 652 is pivotally connected to the second end of the end cap 640, and the other end is pivotally connected to the middle portion of the pull rod 651.

In practical use, when the end cap 640 needs to be opened, the pull rod 651 is rotated counterclockwise, that is, the pull rod 651 drives the connecting rod 652 to further drive the end cap 640 to rotate counterclockwise around the first end of the end cap 640, and the end cap 640 is opened; when the end cap 640 needs to be closed, the pull rod 651 is rotated clockwise, that is, the pull rod 651 drives the connecting rod 652 to further drive the end cap 640 to rotate clockwise around the first end of the end cap 640, and the end cap 640 is closed.

In some embodiments, the seal cutting tool further comprises a dust suction mechanism 611, the dust suction mechanism 611 being disposed on the mount 610. The gang tool 110 is inserted into the mount 610, cutting is performed in the mount 610, and the cut chips are directly sucked by the dust suction mechanism 611.

In some embodiments, the seal cutting tool further comprises a silencer 800, the silencer 800 is disposed on the rotating mechanism 200, and in particular, the silencer 800 is disposed near the driving member 240 of the rotating mechanism 200 for reducing noise generated when the driving member 240 operates.

In some embodiments, the gang tool 110 includes a cutting blade 111 and a grinding blade. The cutting blade 111 is used to directly cut the seal welded portion, and since a portion of the outer wall of the object to be cut is turned over during the cutting process, the grinding blade is used to remove the turned-over portion.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.