CN215392063U

CN215392063U - U-shaped pipe bending die for pipe bending machine

Info

Publication number: CN215392063U
Application number: CN202121827371.9U
Authority: CN
Inventors: 黎家明; 伍先吉; 杨伟
Original assignee: Foshan Guangyu Stainless Steel Co ltd
Current assignee: Foshan Guangyu Stainless Steel Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-04
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses a U-shaped pipe bending die for a pipe bending machine, which comprises a guide die, a wheel die, a clamping die and a crease-resistant die assembly, wherein the guide die is arranged on a guide die seat and is provided with a first groove, the wheel die is arranged on the wheel die seat and is provided with a second groove, the second groove and the first groove are matched to form a round hole, the clamping die is arranged on the clamping die seat and is provided with a third groove, the third groove and the second groove are matched to form a round through hole, the crease-resistant die assembly comprises a base, a first translation mechanism, a second translation mechanism and a crease-resistant plate, the base is arranged on a base of the pipe bending machine, the first translation mechanism is arranged on the base and is provided with an upright post, the second translation mechanism is arranged on the upright post and is provided with an upright plate, the crease-resistant plate is arranged on the upright plate and is provided with a fourth groove, the fourth groove and the first groove are matched to form a round through hole, and the upright post and the second translation mechanism are both positioned below the fourth groove. By adopting the utility model, the function that the same section of clamping end can be utilized for processing two U-shaped pipes is realized, so that the waste of the clamping end is saved, and the production cost is reduced.

Description

U-shaped pipe bending die for pipe bending machine

Technical Field

The utility model relates to the field of hollow pipe processing equipment, in particular to a U-shaped pipe bending die for a pipe bending machine.

Background

The U-shaped pipe is one part of the exhaust pipe assembly, and the processing mode is as follows: firstly, a hollow pipe with the length of a is placed on a pipe bending machine, then the pipe bending machine is matched with a bending die to bend the hollow pipe into a U-shaped pipe, and finally waste materials at a clamping end and waste materials at a bundling and clamping end on the U-shaped pipe are cut out.

For can saving pipe fitting waste material and reduce the processing cost, current a processing mode: a hollow pipe is placed on a pipe bending machine, the length of the hollow pipe is obtained by subtracting the length of a section of clamping end waste from the length of two hollow pipe blanks, namely 2 a-the length of the clamping end waste, then the pipe close to one side of a clamping end is bent into a U shape, the clamping end waste and the hollow pipe with the length a are respectively cut off at two ends of the U-shaped pipe according to the processing requirement after the hollow pipe is taken out, then the hollow pipe with the length a is placed on the pipe bending machine again to be bent, and finally the clamping end waste and the clamping end waste at two ends of the U-shaped pipe are cut out, so that one section of clamping end waste can be saved when two U-shaped pipes are processed.

However, the conventional bending die cannot implement this processing means because the wrinkle removing unit of the bending die obstructs the moving space of the long hollow tube after the primary bending and the processing method cannot be implemented, and therefore a set of dedicated U-shaped tube bending die capable of implementing the processing method is required.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a U-shaped pipe bending die for a pipe bending machine, which realizes the function that two U-shaped pipes can utilize the same section of clamping end, so that waste materials of the clamping end are saved, and the production cost is reduced.

In order to solve the technical problem, the utility model provides a U-shaped pipe bending die for a pipe bending machine, wherein a base of the pipe bending machine is provided with a guide die holder, a wheel die holder and a die clamping holder, the wheel die holder drives the die clamping holder to rotate, the U-shaped pipe bending die comprises a guide die, a wheel die, a die clamping and a crease-resist die assembly, the guide die is arranged on the guide die holder, the side wall of the guide die is provided with a first semi-tubular groove, the wheel die is arranged on the wheel die holder and positioned at one side of the guide die, the wheel die is driven by the wheel die holder to rotate around the axial lead of the wheel die, the side wall of the wheel die is provided with a second semi-tubular groove, the second groove and the first groove are matched to form a whole round hole for positioning a hollow pipe, the die clamping is arranged on the die clamping holder, the die clamping rotates around the axial lead of the wheel die under the action of the die clamping holder, the wheel die and the die synchronously rotate, the side wall of the die clamping die is provided with a third groove which is matched to form a whole round through hole, the anti-wrinkling mould component comprises a base, a first translation mechanism, a second translation mechanism and an anti-wrinkling plate, wherein the base is installed on a base of the pipe bending machine and located on one side of the guide mould, the first translation mechanism is installed on the base, an upright post is installed on the first translation mechanism, the second translation mechanism is installed on the upright post, a vertical plate is installed on the output end of the second translation mechanism, the anti-wrinkling plate is installed on the upright plate, a semi-tubular groove IV is formed in the side wall of the anti-wrinkling plate, the groove IV is matched with the groove I to form a full-circle through hole for supporting the hollow pipe, the groove IV is tangent to the groove II, and the upright post and the second translation mechanism are both located below the groove IV.

The first translation mechanism comprises a sliding seat, a screw rod, a first locking screw and a positioning plate, the sliding seat is connected with the base in a sliding mode, the positioning plate is fixed on the base, one end of the screw rod is connected with the positioning plate in a rotating mode, the other end of the screw rod is connected with the sliding seat in a threaded mode, the screw rod is rotated to adjust the distance between the sliding seat and the positioning plate, and the sliding seat can be fixed on the base through the first locking screw.

Wherein, first translation mechanism still includes T type nut, it has the type of falling T groove to open on the base, the bottom is provided with type of falling T groove sliding connection's sand grip one on the slide, and T type nut is installed at type of falling T inslot, locking screw one is fixed the slide on the base with the cooperation of T type nut.

The second translation mechanism comprises a movable table, a first sliding block, a second locking screw and a first protruding block, the movable table is connected with the stand column in a sliding mode and can be locked on the stand column, a first kidney-shaped groove is horizontally formed in the first sliding block, the second locking screw penetrates through the first kidney-shaped groove and is in threaded connection with the movable table, the first protruding block is arranged on the movable table, a first adjusting screw is connected to the first protruding block in a threaded mode, the tail end of the first adjusting screw abuts against the first sliding block to adjust the distance between the first sliding block and the first protruding block, and the first sliding block is arranged on the vertical plate.

The second translation mechanism further comprises a second sliding block, a third locking screw and a second convex block, the second sliding block is L-shaped, the first sliding block is installed on one side edge of the second sliding block, the first convex block is fixed on the second sliding block, a second kidney-shaped groove is formed in the other side edge of the second sliding block, the third locking screw penetrates through the second kidney-shaped groove and is in threaded connection with the movable table, the second convex block is arranged on the movable table, the second convex block is in threaded connection with a second adjusting screw, and the second adjusting screw abuts against the second sliding block to adjust the distance between the second sliding block and the second convex block.

The crease-resistant die assembly further comprises a fourth locking screw, a second raised line is arranged at the bottom of the base and is in sliding connection with the base of the pipe bender, a plurality of mounting holes are formed in the base, the mounting holes are symmetrically formed in two sides of the first translation mechanism, and the fourth locking screw penetrates through the mounting holes and is in threaded connection with the base.

The clamping die comprises a clamping die base and a clamping die base, and is characterized by further comprising a locking screw five, wherein a T-shaped sliding block is fixed on one side of the clamping die far away from the groove three, a threaded hole I is formed in the T-shaped sliding block, the T-shaped sliding block is connected with the clamping die base in a sliding mode, and the T-shaped sliding block is locked on the clamping die base through the locking screw five.

The guide die comprises a guide die base and a guide die seat, and is characterized by further comprising a locking screw six, wherein one side, far away from the first groove, of the guide die is provided with a vertical groove, the vertical groove is in sliding connection with the guide die seat, and the guide die is locked on the guide die seat through the locking screw six.

The beneficial effects of the implementation of the utility model are as follows: the first groove and the fourth groove are matched to support the hollow pipe, so that the hollow pipe can smoothly enter the wheel die, the second groove and the third groove are matched to bend the hollow pipe, the second translation mechanism and the stand column on the crease-resistant die assembly are located below the fourth groove, the moving space of the bent long hollow pipe is prevented from being obstructed, the function of processing the same clamping end of two U-shaped pipes can be utilized, the waste of the clamping end is saved, and the production cost is reduced.

Drawings

Fig. 1 is a top view of a U-shaped pipe bending die for a pipe bending machine according to the present invention;

FIG. 2 is a side view of a U-shaped pipe bending die for a pipe bending machine according to the present invention;

FIG. 3 is a top view of a wheel mold and a crease-resistant membrane module in a U-shaped pipe bending mold for a pipe bending machine according to the present invention;

FIG. 4 is a side view of a wheel mold and a crease-resistant membrane module in a U-shaped pipe bending mold for a pipe bending machine according to the present invention;

FIG. 5 is a rear view of a U-shaped pipe bending die for a pipe bending machine, which is provided by the utility model, in which a wheel die and a crease-resistant membrane component are matched.

In the figure: 1. a machine base; 11. a guide die holder; 12. a wheel die holder; 13. a die clamping seat; 2. guiding a mold; 21. a first groove; 22. a vertical groove; 3. a wheel mold; 31. a second groove; 4. clamping a mold; 41. a third groove; 5. a crease-resist die assembly; 51. a base; 511. a T-shaped groove is inverted; 512. locking a screw IV; 513. A convex strip II; 52. a first translation mechanism; 521. a slide base; 522. a screw; 523. locking the first screw; 524. positioning a plate; 525. a T-shaped nut; 526. a first convex strip; 53. a second translation mechanism; 531. a movable table; 532. a first sliding block; 533. a second locking screw; 534. a first bump; 535. adjusting a first screw; 536. a second sliding block; 537. locking a screw III; 538. a second bump; 539. a second adjusting screw; 54. anti-wrinkling boards; 541. a fourth groove; 55. a column; 56. a vertical plate; 6. locking a screw V; 7. a T-shaped slider; 8. locking a screw six; 9. and a seventh locking screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, the U-shaped pipe bending die for a pipe bending machine of the present invention includes a guide die holder 11, a wheel die holder 12 and a clamp die holder 13, the wheel die holder 12 drives the clamp die holder 13 to rotate, the U-shaped pipe bending die includes a guide die 2, a wheel die 3, a clamp die 4 and a crease-resistant die assembly 5, the guide die 2 is installed on the guide die holder 11, a first half-pipe-shaped groove 21 is formed on a side wall of the guide die 2, the first groove 21 is used for supporting one side of a hollow pipe, the wheel die 3 is installed on the wheel die holder 12 and located on one side of the guide die 2, the wheel die 3 is driven by the wheel die holder 12 to rotate around an axial lead thereof, a second half-pipe-shaped groove 31 is formed on a side wall of the wheel die 3, the second groove 31 is used for providing bending of the hollow pipe around the second groove 31, the second groove 31 and the first groove 21 cooperate to form a complete round hole for positioning the hollow pipe, the clamp die 4 is installed on the clamp die holder 13, the clamp die 4 rotates around the axial lead of the wheel die holder 3 under the action of the clamp die holder 13, the wheel mold 3 and the clamping mold 4 rotate synchronously, the side wall of the clamping mold 4 is provided with a third semi-tubular groove 41, the third groove 41 and the second groove 31 are matched to form a round through hole for clamping the hollow pipe so as to bend the hollow pipe around the axial lead of the wheel mold 3, the bending angle is 180 degrees, and therefore the hollow pipe is bent into a U-shaped pipe, the crease-resist mold assembly 5 comprises a base 51, a first translation mechanism 52, a second translation mechanism 53 and a crease-resist plate 54, the base 51 is arranged on the base 1 of the pipe bender and is positioned on one side of the guide mold 2, the first translation mechanism 52 is arranged on the base 51, the upright post 55 is vertically arranged on the first translation mechanism 52, the second translation mechanism 53 is arranged on the upright post 55, the output end of the second translation mechanism 53 is provided with an upright plate 56, the upright plate 54 is arranged on the upright post 56, the side wall of the crease-resist plate 54 is provided with a fourth semi-tubular groove 541, and the first groove 21 are matched to form a round through hole, the supporting device is used for supporting the hollow pipe, so that the pipe wall of the hollow pipe is prevented from being wrinkled in the bending process of the hollow pipe, the groove four 541 is tangent to the groove two 31, the groove one 21 is matched with the groove four 541 to support the hollow pipe, the hollow pipe can smoothly enter the wheel die 3, the upright column 55 and the second translation mechanism 53 are both positioned below the groove four 541, and the interference of the upright column 55 and the second translation mechanism 53 on the movement space of the hollow pipe is avoided.

The working principle of the utility model is as follows: respectively corresponding a guide die 2, a wheel die 3, a clamping die 4 and a crease-resist die assembly 5 on a guide die seat 11, a wheel die seat 12, a clamping die seat 13 and a machine base 1, and ensuring that the axes of a first groove 21, a second groove 31, a third groove 41 and a fourth groove 541 are firstly on the same horizontal plane; the initial position of the clamp die 4 is on the extension line position of the guide die 2, then the pipe bending machine pushes the hollow pipe to the right position, compared with the prior art, the pipe bending machine needs to push forward by a distance a, then the wheel die holder 12 and the clamp die holder 13 respectively drive the wheel die 3 and the clamp die 4 to synchronously rotate 180 degrees around the axial lead of the wheel die 3, and the pipe bending machine synchronously pushes the hollow pipe forward, so that the hollow pipe is bent into a U-shaped pipe around the groove II 31 of the wheel die 3; and then taking out the pipe fitting, cutting the waste material at the clamping end and the rest straight pipe part as required, then taking out and bending the rest pipe fitting again, repeating the actions, and finally cutting the waste material at the clamping end and the waste material at the clamping end of the U-shaped pipe. The function of saving the clamping end waste materials is realized by processing two U-shaped pipes and utilizing the same section of clamping end, and the production cost is reduced.

Preferably, referring to fig. 3, 4 and 5, the first translation mechanism 52 includes a sliding base 521, a screw 522, a first locking screw 523 and a positioning plate 524, the sliding base 521 is slidably connected to the base 51, the positioning plate 524 is fixed to the base 51, one end of the screw 522 is rotatably connected to the positioning plate 524, and the other end of the screw is in threaded connection with the sliding base 521, the screw 522 is rotated to adjust the distance between the sliding base 521 and the positioning plate 524, so that the sliding base 521 can be fixed to the base 51 by the first locking screw 523 to adjust the distance between the guide die 2 and the anti-crease plate 541. In order to adjust the horizontal distance between the anti-crease plate 54 and the guide die 2, during adjustment, the slide seat 521 is close to the guide die 2 by rotating the screw 522, and after adjustment, the first locking screw 523 is locked to fix the position of the slide seat 521.

Specifically, referring to fig. 5, the first translation mechanism 52 further includes a T-shaped nut 525, the base 51 is provided with an inverted T-shaped groove 511, the bottom of the sliding base 521 is provided with a first protruding strip 526 slidably connected to the inverted T-shaped groove 511, when the first protruding strip 526 slides along the inverted T-shaped groove 511, the sliding base 521 moves close to or away from the guide die 2, the T-shaped nut 525 is installed in the inverted T-shaped groove 511 and can slide in the inverted T-shaped groove 511, and the first locking screw 523 cooperates with the T-shaped nut 525 to fix the sliding base 521 on the base 51.

Preferably, referring to fig. 3 and 4, the blank-holding die assembly 5 further includes a locking screw four 512, the bottom of the base 51 is provided with a second protruding strip 513, the second protruding strip 513 is slidably connected with the base 1 of the tube bending machine, and the base 51 can move horizontally along the second protruding strip 513 to be close to or away from the die 3, so as to adjust the blank-holding plate 54 to be close to the die 3. The base 51 is provided with a plurality of mounting holes, and the mounting holes are symmetrically arranged on two sides of the first translation mechanism 52, in this embodiment, the number of the mounting holes is 8, and 8 locking screws four 512 penetrate through the mounting holes to be in threaded connection with the base 51, so that the base 51 is fixed on the base 1 of the pipe bender. A plurality of mounting holes are arranged on two sides of the first translation mechanism 52, the position of the base 51 is adjusted, and the base 51 is fixed on the base 1 of the pipe bender.

Preferably, referring to fig. 3, 4 and 5, the second translation mechanism 53 includes a movable table 531, a first slider 532, a second locking screw 533 and a first projection 534, the movable table 531 is slidably connected to the upright column 55 and can be locked on the upright column 55, specifically, a vertical hole matched with the upright column 55 is provided on the movable table 531, a through groove communicated with the vertical hole is provided on a side wall of the movable table 531, the through groove is connected with a seventh locking screw 9, the width of the through groove is controlled by screwing in or screwing out the seventh locking screw 9, so that the vertical hole is tightly attached to or loosened from the upright column 55, thereby achieving the purpose that the movable table 531 is fixed on the upright column 55 or the movable table 531 can slide on the upright column 55, and by adjusting the height of the movable table 531, the axis of the fourth groove 541 on the wrinkle-resistant plate 54 and the axis of the second groove 31 can be adjusted on the same horizontal plane. The first slider 532 is horizontally provided with a first waist-shaped groove, the second locking screw 533 penetrates through the first waist-shaped groove to be in threaded connection with the movable table 531, the first projection 534 is arranged on the movable table 531, the first projection 534 is in threaded connection with the first adjusting screw 535, the tail end of the first adjusting screw 535 abuts against the first slider 532 to adjust the distance between the first slider 532 and the first projection 534, and the first slider 532 is arranged on the vertical plate 56. The adjusting groove IV 541 is in contact with the groove II 31, the first sliding block 532 is close to the wheel die 3 by screwing in the adjusting screw I535, and when the adjusting is in place, the locking screw II 533 is locked. By providing the second translation mechanism 53, the hollow pipes supported by the first groove 21 and the fourth groove 541 can be ensured to smoothly enter the wheel die 3.

It should be noted that adjusting the position of the base 51 mounted on the base 1 of the tube bending machine to adjust the distance between the blank-proof plate 54 and the wheel mold 3 is a way of roughly adjusting the position; the position of the first adjusting slide block 532 arranged on the movable table 531 is used for adjusting the contact between the groove four 541 of the crease-resistant plate 54 and the groove two 31 of the wheel die 3, the position is finely adjusted, and the groove four 541 is ensured to be contacted with the groove two 31 and is tangent with the groove two 31 in a matching mode.

Preferably, referring to fig. 3, 4 and 5, the second translation mechanism 53 further includes a second slider 536, a third locking screw 537 and a second protrusion 538, the second slider 536 is L-shaped, the first slider 532 is mounted on one side of the second slider 536, the first protrusion 534 is fixed on the second slider 536, the other side of the second slider 536 is provided with a second kidney-shaped slot, the third locking screw 537 penetrates through the second kidney-shaped slot to be in threaded connection with the movable table 531, the second protrusion 538 is disposed on the movable table 531, the second protrusion 538 is in threaded connection with the second adjusting screw 539, and the second adjusting screw 539 abuts against the second slider 536 to adjust the distance between the second slider 536 and the second protrusion 538. The four adjusting grooves 541 and the two adjusting grooves 31 are spliced to form a full-circle through hole, the second sliding block 536 moves close to the direction of the guide die 2 by screwing in the second adjusting screw 539, so that the four adjusting grooves 541 and the two adjusting grooves 31 are spliced, and when the adjusting is in place, the position of the second sliding block 536 on the movable table 531 can be fixed by locking the third locking screw 537.

When it is required to be mentioned, the first translation mechanism 52 is adjusted to roughly adjust the distance between the blank-proof plate 54 and the guide die 2; the position of the second adjusting slider 536 on the movable table 531 is the distance between the fine adjustment crease-resist plate 54 and the guide die 2, so as to ensure that the groove four 541 and the groove one 21 are spliced into a full-circle through hole.

Preferably, referring to fig. 1 and 2, a locking screw five 6 is further included, a T-shaped slider 7 is fixed on one side of the die holder 4 away from the third groove 41, a first threaded hole is formed in the T-shaped slider 7, and the T-shaped slider 7 is slidably connected with the die holder 13 and locked on the die holder 13 through the locking screw five 6. The mounting height of the clamp die 4 on the clamp die base 13 is adjusted according to the position of the second groove 31 on the wheel die 3, so that the second groove 31 and the third groove 41 can be spliced into a whole circular hole.

Preferably, referring to fig. 1 and 2, the guide die further comprises a locking screw six 8, a vertical groove 22 is formed in one side, away from the first groove 21, of the guide die 2, the vertical groove 22 is slidably connected with the guide die holder 11, and the guide die 2 is locked on the guide die holder 11 through the locking screw six 8. And adjusting the installation height of the guide die 2 on the guide die seat 11 according to the position of the second groove 31 on the wheel die 3, so that the second groove 31 and the second groove 31 can be spliced into a full-circle through hole.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A U-shaped pipe bending die for a pipe bending machine is characterized in that a guide die seat (11), a wheel die seat (12) and a die clamping seat (13) are arranged on a base (1) of the pipe bending machine, the wheel die seat (12) drives the die clamping seat (13) to rotate, the U-shaped pipe bending die comprises a guide die (2), a wheel die (3), a clamping die (4) and a crease-resistant die assembly (5), the guide die (2) is installed on the guide die seat (11), a semi-tubular groove I (21) is formed in the side wall of the guide die (2), the wheel die (3) is installed on the wheel die seat (12) and located on one side of the guide die (2), the wheel die (3) rotates around the axial lead under the driving of the wheel die seat (12), a semi-tubular groove II (31) is formed in the side wall of the wheel die (3), the groove II (31) and the groove I (21) are matched to form a whole round hole for positioning a hollow pipe, the die clamping die (4) is installed on the die clamping seat (13), the clamp die (4) rotates around the axis of the wheel die (3) under the action of the clamp die seat (13), the wheel die (3) and the clamp die (4) rotate synchronously, a semi-tubular groove III (41) is formed in the side wall of the clamp die (4), the groove III (41) and the groove II (31) are matched to form a full-circle through hole for supporting a hollow pipe to bend around the axis of the wheel die (3), the crease-resistant die assembly (5) comprises a base (51), a first translation mechanism (52), a second translation mechanism (53) and a crease-resistant plate (54), the base (51) is installed on the base (1) of the pipe bender and located on one side of the guide die (2), the first translation mechanism (52) is installed on the base (51), an upright post (55) is installed on the first translation mechanism (52), the second translation mechanism (53) is installed on the upright post (55), and a vertical plate (56) is installed on the output end of the second translation mechanism (53), the anti-wrinkling plate (54) is arranged on the vertical plate (56), a semi-tubular groove four (541) is formed in the side wall of the anti-wrinkling plate (54), the groove four (541) and the groove one (21) are matched to form a full-circle through hole for supporting the hollow pipe, the groove four (541) is tangent to the groove two (31), and the upright column (55) and the second translation mechanism (53) are both located below the groove four (541).

2. The U-shaped pipe bending die for the pipe bending machine according to claim 1, wherein the first translation mechanism (52) comprises a sliding base (521), a screw rod (522), a first locking screw (523) and a positioning plate (524), the sliding base (521) is slidably connected with the base (51), the positioning plate (524) is fixed on the base (51), one end of the screw rod (522) is rotatably connected with the positioning plate (524) and the other end of the screw rod is in threaded connection with the sliding base (521), the screw rod (522) is rotated to adjust the distance between the sliding base (521) and the positioning plate (524), and the sliding base (521) is fixed on the base (51) through the first locking screw (523).

3. The U-shaped pipe bending die for the pipe bending machine as claimed in claim 2, wherein the first translation mechanism (52) further comprises a T-shaped nut (525), an inverted T-shaped groove (511) is formed in the base (51), a first convex strip (526) in sliding connection with the inverted T-shaped groove (511) is arranged at the bottom of the sliding seat (521), the T-shaped nut (525) is installed in the inverted T-shaped groove (511), and the first locking screw (523) is matched with the T-shaped nut (525) to fix the sliding seat (521) on the base (51).

4. The U-shaped pipe bending die for the pipe bending machine is characterized in that the second translation mechanism (53) comprises a movable table (531), a first sliding block (532), a second locking screw (533) and a first projection (534), the movable table (531) is connected with the upright column (55) in a sliding mode and can be locked on the upright column (55), the first sliding block (532) is horizontally provided with a first waist-shaped groove, the second locking screw (533) penetrates through the first waist-shaped groove and is in threaded connection with the movable table (531), the first projection (534) is arranged on the movable table (531), the first projection (534) is in threaded connection with a first adjusting screw (535), the tail end of the first adjusting screw (535) abuts against the first sliding block (532) to adjust the distance between the first sliding block (532) and the first projection (534), and the first sliding block (532) is arranged on the vertical plate (56).

5. The U-shaped pipe bending die for the pipe bending machine according to claim 4, wherein the second translation mechanism (53) further comprises a second sliding block (536), a third locking screw (537) and a second projection (538), the second sliding block (536) is L-shaped, the first sliding block (532) is installed on one side edge of the second sliding block (536), the first projection (534) is fixed on the second sliding block (536), the second sliding block (536) is provided with a second waist-shaped groove on the other side edge, the third locking screw (537) penetrates through the second waist-shaped groove and is in threaded connection with the movable table (531), the second projection (538) is arranged on the movable table (531), the second projection (538) is in threaded connection with the second adjusting screw (539), and the second adjusting screw (539) abuts against the second sliding block (536) to adjust the distance between the second sliding block (536) and the second projection (538).

6. The U-shaped pipe bending die for the pipe bending machine according to claim 1, wherein the crease-resist die assembly (5) further comprises four locking screws (512), a second protruding strip (513) is arranged at the bottom of the base (51), the second protruding strip (513) is slidably connected with the base (1) of the pipe bending machine, a plurality of mounting holes are formed in the base (51), the mounting holes are symmetrically arranged on two sides of the first translation mechanism (52), and the four locking screws (512) penetrate through the mounting holes to be in threaded connection with the base (51).

7. The U-shaped pipe bending die for the pipe bending machine according to claim 1, further comprising a locking screw five (6), wherein a T-shaped sliding block (7) is fixed on one side of the clamping die (4) far away from the groove three (41), a threaded hole I is formed in the T-shaped sliding block (7), and the T-shaped sliding block (7) is slidably connected with the clamping die holder (13) and locked on the clamping die holder (13) through the locking screw five (6).

8. The U-shaped pipe bending die for the pipe bending machine is characterized by further comprising six locking screws (8), wherein a vertical groove (22) is formed in one side, away from the first groove (21), of the guide die (2), the vertical groove (22) is in sliding connection with the guide die holder (11), and the guide die (2) is locked on the guide die holder (11) through the six locking screws (8).