阅读说明：本技术 折弯机及管件加工方法 (Bending machine and pipe fitting machining method ) 是由 苏天哲 张志海 向小辉 于 2021-08-06 设计创作，主要内容包括：本发明涉及管件加工领域,公开了一种折弯机及管件加工方法,所述折弯机包括轮模(1)和夹模(2),所述轮模(1)和所述夹模(2)设置有直线容纳空间(8),所述待折弯件(4)包括与所述直线段(6)直接连接的待折弯段(7),所述直线段(6)远离所述待折弯段(7)的一端的外周上设置有外径大于所述直线段(6)的定位连接件(5),所述直线容纳空间(8)包括容纳所述直线段(6)的第一段和容纳所述定位连接件(5)的第二段。通过上述技术方案,可以减小待折弯件的直线部分的长度,且避免定位连接件被夹紧变形,并且允许待折弯件做端部成型后进行折弯,消除了折弯后进行端部成型的局限性,提高了折弯机的适用范围。(The invention relates to the field of pipe fitting machining, and discloses a bending machine and a pipe fitting machining method, wherein the bending machine comprises a wheel die (1) and a clamping die (2), a linear accommodating space (8) is formed in the wheel die (1) and the clamping die (2), a to-be-bent piece (4) comprises a to-be-bent section (7) directly connected with the linear section (6), a positioning connecting piece (5) with the outer diameter larger than that of the linear section (6) is arranged on the periphery of one end, far away from the to-be-bent section (7), of the linear section (6), and the linear accommodating space (8) comprises a first section accommodating the linear section (6) and a second section accommodating the positioning connecting piece (5). Through the technical scheme, the length of the straight line part of the piece to be bent can be reduced, the positioning connecting piece is prevented from being clamped and deformed, the piece to be bent is allowed to be bent after the end part is formed, limitation of forming the end part after the bending is eliminated, and the application range of the bending machine is widened.)

1. The utility model provides a bending machine, its characterized in that, bending machine includes wheel mould (1) and clamp mould (2), wheel mould (1) with the part that clamp mould (2) spliced each other is provided with and holds and the centre gripping treats straight line accommodation space (8) of straightway (6) of bending piece (4), treat bending piece (4) include with straightway (6) lug connection treat bending section (7), straightway (6) are kept away from be provided with the external diameter on the periphery of the one end of treating bending section (7) and be greater than positioning connection spare (5) of straightway (6), straight line accommodation space (8) are including holding the first section of straightway (6) and holding the second section of positioning connection spare (5).

2. The bending machine according to claim 1, wherein said first segment and said second segment are connected by a first step surface.

3. Machine according to claim 1, characterized in that said second section has a section corresponding to the outer profile of the nut.

4. Machine according to claim 1, wherein said rectilinear housing space (8) is formed by a first rectilinear groove splice provided respectively on said wheel die (1) and on said clamping die (2).

5. Machine according to claim 1, characterized in that it comprises a guide die (3) able to interface with said clamping die (2), said die (1) and said clamping die (2) being able to rotate synchronously so that said die (1) cooperates with said guide die (3) to bend the piece (4) to be bent.

6. The bending machine according to claim 5, wherein the guide die (3) is provided with a second linear groove capable of abutting against the linear accommodating space (8), the wheel die (1) is provided with an arc-shaped groove abutting against the linear accommodating space (8), and the wheel die (1) can clamp and bend different positions of a section (7) to be bent of the piece (4) to be bent through different parts of the arc-shaped groove and the second linear groove.

7. A pipe processing method, characterized by comprising:

s1, connecting a positioning connecting piece (5) at the end part of the pipe fitting;

s2, partially disposing the tube in the linear accommodation space (8) of the bending machine according to any one of claims 1 to 6, the positioning connection (5) being disposed in the second section, the tube being bent by the bending machine.

8. A method of machining a pipe according to claim 7, characterized in that the positioning connection (5) is a nut.

9. A method of manufacturing a tubular element as claimed in claim 8, characterized in that said nut comprises a first hole section with a smaller inner diameter, a second hole section with a larger inner diameter and a second step surface located between the first hole section and the second hole section, said first hole section is closer to said section (7) to be bent than said second hole section, in S1, said first hole section is screwed to said tubular element, and then said tubular element is provided with a shoulder (9) stopping on said second step surface by a fine process.

10. The pipe processing method according to claim 7, wherein both ends of the pipe are blanked and then the positioning links (5) are connected in S1; and after the pipe fitting is bent, machining the end part of one end which is not connected with the positioning connecting piece (5).

Technical Field

The invention relates to the field of pipe fitting machining, in particular to a bending machine and a pipe fitting machining method.

Background

In manufacturing a pipe fitting with a bent part, a method of bending first and then forming an end part is generally adopted, so that enough length needs to be reserved for a straight line part connected with the bent part, enough processing space needs to be reserved for an end part forming die, otherwise end part processing cannot be carried out, and the length of the straight line part is too large; if the tip portion is formed and then bent, the already formed portion cannot be held in the bending machine, and the length of the straight portion also needs to be increased.

Disclosure of Invention

The invention aims to provide a bending machine, which solves the problem that the length of a clamped straight line part connected with a bending part is too large.

In order to achieve the above object, the invention provides a bending machine, where the bending machine includes a wheel die and a clamp die, a straight line accommodating space for accommodating and clamping a straight line segment of a to-be-bent piece is provided at a portion where the wheel die and the clamp die are spliced with each other, the to-be-bent piece includes a to-be-bent piece directly connected to the straight line segment, a positioning connecting piece having an outer diameter larger than that of the straight line segment is provided on an outer periphery of one end of the straight line segment away from the to-be-bent piece, and the straight line accommodating space includes a first segment for accommodating the straight line segment and a second segment for accommodating the positioning connecting piece.

Optionally, the first section and the second section are connected by a first step surface.

Alternatively, the cross-section of said second section corresponds to the outer contour of the nut.

Alternatively, the linear accommodating space is formed by splicing first linear grooves respectively arranged on the wheel die and the clamping die.

Optionally, the bending machine includes a guide die capable of abutting against the clamp die, and the wheel die and the clamp die are capable of rotating synchronously, so that the wheel die and the guide die cooperate to bend the piece to be bent.

Optionally, the guide die is provided with a second linear groove capable of being in butt joint with the linear accommodating space, the wheel die is provided with an arc-shaped groove in butt joint with the linear accommodating space, and the wheel die can clamp and bend different positions of a section to be bent of a piece to be bent through different parts of the arc-shaped groove and the second linear groove.

In addition, the invention also provides a pipe fitting processing method, wherein the pipe fitting processing method comprises the following steps:

s1, connecting a positioning connecting piece at the end part of the pipe fitting;

s2, partially disposing the pipe in the linear accommodation space of the bending machine, and disposing the positioning connector in the second segment, wherein the pipe is bent by the bending machine.

Optionally, the positioning connector is a nut.

Optionally, the nut includes a first hole section with a smaller inner diameter, a second hole section with a larger inner diameter, and a second step surface located between the first hole section and the second hole section, where the first hole section is closer to the section to be bent than the second hole section, and in S1, the first hole section is screwed to the pipe, and then a shoulder stopping at the second step surface is formed on the pipe by a fine process.

Optionally, in S1, blanking both ends of the pipe, and then connecting the positioning connectors; and after the pipe fitting is bent, machining the end part of one end which is not connected with the positioning connecting piece.

Through the technical scheme, the space for accommodating the positioning connecting piece on the piece to be bent is arranged in the wheel die and the clamping die, the length of a straight line part of the piece to be bent can be reduced, the positioning connecting piece is prevented from being clamped and deformed, the piece to be bent is allowed to be bent after end forming, limitation of end forming after bending is eliminated, and the application range of the bending machine is widened.

Drawings

Fig. 1 is a schematic structural diagram of a bending machine according to an embodiment of the invention;

FIG. 2 is a partial cross-sectional view of an element to be bent according to an embodiment of the invention;

fig. 3 is a schematic structural diagram of a member to be bent according to an embodiment of the present invention after bending, where a positioning connection member is not shown.

Description of the reference numerals

1 wheel mould 2 clamp mould

3 guide die 4 to-be-bent piece

5 positioning connecting piece 6 straight line segment

7 treat 8 sharp accommodation spaces of section of bending

9 shaft shoulder

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The invention provides a bending machine, which comprises a wheel die 1 and a clamp die 2, wherein a linear accommodating space 8 for accommodating and clamping a linear section 6 of a to-be-bent piece 4 is arranged at the part where the wheel die 1 and the clamp die 2 are spliced with each other, the to-be-bent piece 4 comprises a to-be-bent section 7 directly connected with the linear section 6, a positioning connecting piece 5 with the outer diameter larger than that of the linear section 6 is arranged on the periphery of one end, far away from the to-be-bent section 7, of the linear section 6, and the linear accommodating space 8 comprises a first section for accommodating the linear section 6 and a second section for accommodating the positioning connecting piece 5.

As shown in fig. 1, the bending machine has a portion where the die 1 and the clamp die 2 are spliced with each other, the straight edge portion of the die 1 and the straight edge portion of the clamp die 2 are engaged with each other, at the spliced portion, a straight accommodating space 8 is provided to accommodate the member to be bent 4, and during the bending, the die 1 and the clamp die 2 collectively clamp the member to be bent 4 located in the straight accommodating space 8.

The linear accommodating space 8 is linear and does not change in the bending process, so that the piece to be bent 4 in the part is kept linear, namely the linear section 6; the adjacent part directly connected with the straight line section 6 is a section 7 to be bent, and the section is gradually bent along the length direction in the bending process to form a bent shape.

The piece 4 to be bent is of an elongated shape, such as a rod or a pipe, and in some cases, the end of the piece 4 to be bent is provided with a positioning connector 5, the outer diameter of which is larger than the piece 4 to be bent.

The inner diameter of the first section of the linear accommodating space 8 is relatively small, and the inner diameter of the second section is relatively large, so that the linear section 6 of the piece 4 to be bent is accommodated in the first section, the positioning connecting piece 5 is accommodated in the second section, the inner diameter of the second section can be slightly larger than the outer diameter of the positioning connecting piece 5, and overlarge clamping acting force is prevented from being applied to the positioning connecting piece 5 by the wheel die 1 and the clamping die 2; compared with the prior art, the positioning connecting piece 5 is accommodated by increasing the inner diameter of a part of the straight line accommodating space 8 on the basis of the straight line accommodating space 8 in the prior art.

The positioning connecting piece 5 connected to the piece 4 to be bent or the portion for connecting the positioning connecting piece 5 (in the state of not connecting the positioning connecting piece 5) is not suitable for being clamped between the wheel die 1 and the clamp die 2 in the prior art, otherwise, the piece is deformed under the clamping action, therefore, a section of the portion clamped by the wheel die 1 and the clamp die 2 needs to be taken out of the portion of the piece 4 to be bent, which is matched with the positioning connecting piece 5, and the portion where the positioning connecting piece 5 is located is ensured to be positioned out of the wheel die 1 and the clamp die 2, which obviously increases the length of the straight line portion of the piece 4 to be bent.

On the other hand, since the positioning connecting piece 5 is accommodated in the linear accommodating space with a larger size between the wheel mold 1 and the clamp mold 2, the positioning connecting piece 5 can be prevented from being clamped and deformed by the wheel mold 1 and the clamp mold 2.

In this scheme, through set up the space that holds the location connecting piece on treating the piece of bending in wheel mould and clamp die, can reduce the length of the straight line portion of treating the piece of bending, and avoid the location connecting piece to be pressed from both sides tightly and warp to the permission is treated the piece of bending and is bent after the tip shaping, has eliminated and has carried out the fashioned limitation of tip after bending, has improved the application scope of bender.

Further, the first section and the second section are connected through a first step surface. The first step surface can stop the positioning connecting piece 5 connected to the piece 4 to be bent, and stop the positioning connecting piece 5 from moving along the second section towards the first section. In other embodiments, the first and second segments may transition by a tapered surface.

Wherein the cross-section of the second section corresponds to the outer contour of the nut. The second section, in a cross-section perpendicular to the length direction, may substantially correspond to the outer contour of the nut member, so that the nut, i.e. the positioning connection 5 in the form of a nut, may be received. The straight accommodating space 8 formed by splicing the wheel die 1 and the clamp die 2 can be completely closed in the circumferential direction, and gaps can also exist, so that the existence of the accommodated piece to be bent 4 or the positioning connecting piece 5 is not influenced basically.

Wherein, the linear accommodating space 8 is formed by splicing first linear grooves respectively arranged on the wheel die 1 and the clamping die 2. The edge of the wheel die 1 and the edge of the clamp die 2 are both formed with first linear grooves, and the two first linear grooves are spliced together to form a linear accommodating space 8 so as to accommodate and clamp the to-be-bent piece 4 positioned therein.

In addition, the bending machine comprises a guide die 3 which can be in butt joint with the clamping die 2, and the wheel die 1 and the clamping die 2 can rotate synchronously, so that the wheel die 1 and the guide die 3 are matched to bend a piece 4 to be bent. Between the operation of bending, guide die 3 and clamp die 2 butt joint, after the operation of bending begins, wheel mould 1 and clamp die 2 centre gripping treat the straightway 6 of the piece 4 of bending and synchronous rotation to keep guide die 3 can act on and treat section 7 of bending, realize treating bending of the piece 4 of bending.

Specifically, the guide die 3 is provided with a second linear groove capable of being in butt joint with the linear accommodating space 8, the wheel die 1 is provided with an arc-shaped groove in butt joint with the linear accommodating space 8, and the wheel die 1 can clamp and bend different positions of a section 7 to be bent of the piece 4 to be bent through different parts of the arc-shaped groove and the second linear groove. As shown in fig. 1, the wheel model 1 includes a straight edge and a circular arc edge, and an arc-shaped groove is formed on the circular arc edge. In the rotation process of the wheel die 1, the segment 7 to be bent is clamped between each part (which can be only one section of continuous area from the starting point and can determine the length of the used arc-shaped groove as required) sequentially passing through the arc-shaped groove and the second linear groove of the guide die 3 from the starting point position (namely the position connected with the first linear groove) of the arc-shaped groove along the circumferential direction of the arc-shaped groove, so that the segment 7 to be bent is gradually attached to the arc-shaped groove, and the bending operation is finally realized.

In addition, the invention also provides a pipe fitting processing method, wherein the pipe fitting processing method comprises the following steps:

s1, connecting a positioning connecting piece 5 at the end part of the pipe fitting;

s2, partially arranging the pipe in the linear accommodating space 8 of the bending machine, and arranging the positioning connector 5 in the second segment, wherein the pipe is bent by the bending machine.

The pipe fitting is one of the above-mentioned pieces 4 to be bent, and the outer diameter of the pipe fitting is smaller than that of the positioning connecting piece 5.

In this scheme, connect location connecting piece 5 earlier, the pipe fitting is bent to rethread bender. Under some circumstances, the pipe fitting is bent the back, and the length of connecting in the straightway of the section of bending is less, is not convenient for carry out tip contour machining, consequently, when the pipe fitting wholly keeps rectilinear state, and the bending is done again to the tip formation earlier and after connecting setting element connecting piece 5, can be convenient for tip contour machining.

On the other hand, as the linear accommodating space 8 of the bending machine is provided with the second section for accommodating the positioning connecting piece 5, the positioning connecting piece 5 can be prevented from being extruded and deformed by the wheel die 1 and the clamping die 2, so that the positioning connecting piece 5 can be better protected; meanwhile, as the second section for accommodating the positioning connecting piece 5 is processed at the position of the original linear accommodating space 8, more length can be reserved at the position outside the positioning connecting piece 5, thereby reducing the length of the linear part.

Specifically, the positioning connecting piece 5 is a nut. The nut can be a hexagon nut or other types of nuts; in addition, the positioning connection piece 5 can also be another structure which protrudes radially outward relative to the pipe, i.e. a structure which requires a linear accommodation space 8 with a larger inner diameter than the pipe itself to accommodate.

The nut comprises a first hole section with a smaller inner diameter, a second hole section with a larger inner diameter and a second step surface located between the first hole section and the second hole section, wherein the first hole section is closer to the section 7 to be bent than the second hole section, in S1, the first hole section is screwed on the pipe fitting, and then a shaft shoulder 9 stopping at the second step surface is formed on the pipe fitting through a fine process. As shown in fig. 2, the hole of the nut includes two sections, one section has a smaller inner diameter, the other section has a larger inner diameter, both the two sections have internal threads, the first hole section with the smaller inner diameter is screwed with the pipe fitting, and the other section can be screwed with other pipes or joints. In addition, after the nut is screwed to the pipe, a shoulder may be upset on a portion of the pipe located in the second bore section through a fine upsetting process to be stopped on the second step surface between the first bore section and the second bore section by the shoulder 9, thereby preventing the nut from being separated from the pipe. The thread processing and the fine upsetting of the pipe fitting are both operated before the pipe fitting is bent, and the pipe fitting is integrally straight, so that great convenience is provided for the forming of the end part of the pipe fitting. As shown in fig. 3, the straight line segment 6 is the shorter one of the two straight pipes connected to the segment 7 to be bent, and when the length of the straight line segment 6 needs to be reduced as much as possible, the above scheme and the bending machine can play a prominent role; when the lengths of the two straight pipes connected to the section 7 to be bent are both longer, the positioning connecting piece connected to the end part of the pipe fitting or the part formed at the end part can avoid the wheel die 1 and the clamp die 2, and the influence of the bending machine is basically avoided.

In addition, in S1, the two ends of the pipe are blanked, and then the positioning connecting piece 5 is connected; after the pipe fitting is bent, the end part of the end part which is not connected with the positioning connecting piece 5 is processed. Cutting off a part of each of the two ends of the pipe fitting to enable the overall length of the pipe fitting to reach a target size, and then machining the ends to connect the positioning connecting pieces 5; after the pipe fitting is bent, the other end of the pipe fitting can be machined, and the straight line part of the other end is larger in length and basically not influenced by the bent part.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.