CN211564194U

CN211564194U - Exhaust pipe punching die

Info

Publication number: CN211564194U
Application number: CN201922309865.7U
Authority: CN
Inventors: 徐军; 谭明明; 李新红; 杨军军; 徐家继; 秦学攀
Original assignee: Wuhan Jinlun Auto Parts Co ltd
Current assignee: Wuhan Jinlun Auto Parts Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-25
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses an exhaust pipe punching die, which comprises a workbench and a lower template, wherein a punching male die is arranged in the middle of the lower template, and radial holes are uniformly distributed on the outer circumference of the punching male die; the periphery of the punching male die is provided with a punching assembly; the punching assembly comprises a fixed seat fixedly arranged on the lower template, a horizontally moving sliding block is arranged in the fixed seat, one end, close to the punching male die, of the sliding block is connected with a punching thimble, the punching thimble is arranged corresponding to the radial hole, and the other end of the sliding block is an inclined plane; one side of the fixed seat, which is close to the inclined plane, is provided with a vertical hole, and a vertical rod is inserted in the vertical hole in a vertically movable manner; one end of the vertical rod is provided with a wedge-shaped structure matched with the inclined plane, and the other end of the vertical rod is connected with an upper template; the upper template is connected with the lower template through a plurality of telescopic guide assemblies; the exhaust pipe punching die is simple and compact in structure, easy to fix and clamp and capable of punching a plurality of holes simultaneously.

Description

Exhaust pipe punching die

Technical Field

The utility model relates to vehicle vent-pipe processing technology field, concretely relates to blast pipe mould that punches.

Background

In the production process of automobiles, various pipe fittings such as exhaust pipes, exhaust manifolds, silencing pipes and the like are needed, the pipe fittings comprise straight pipes and bent pipes, and the pipe fittings are usually circumferentially punched according to the processing requirements so as to be matched with automobile parts for use. When punching, a special punching device, a clamp or a punching die is needed.

The utility model discloses a be used for vehicle vent-pipe processing drilling equipment as chinese utility model patent (publication No. CN208613797U) in 2019, including operation panel, fixed plate A, fixed plate B, anchor clamps, slide bar, control box, place board and placer, operation panel left side upper end is fixed with fixed plate A, operation panel right side upper end is fixed with fixed plate B, fixed plate A and fixed plate B inboard all are provided with anchor clamps. The utility model can circumferentially punch the exhaust pipe, but only one hole can be punched at a time, and when a plurality of holes need to be formed in the circumferential direction, the efficiency of each pipe fitting adopting the device is lower; but also can not be well suitable for punching the bent pipe.

Disclosure of Invention

The utility model aims at the problem that prior art exists, provide a blast pipe mould that punches, can beat a plurality of holes to the pipe fitting simultaneously, improve efficiency and the convenience of punching.

In order to achieve the above object, the utility model adopts the following technical scheme:

the exhaust pipe punching die comprises a workbench, wherein a lower template is screwed on the workbench, a punching male die is arranged in the middle of the lower template, and a plurality of radial holes are uniformly distributed in the outer circumference of the punching male die; a plurality of punching assemblies are arranged on the periphery of the punching male die; the punching assembly comprises a fixed seat fixedly arranged on the lower template, a horizontally moving sliding block is arranged in the fixed seat, one end, close to the punching male die, of the sliding block is connected with a punching thimble, the punching thimble is arranged corresponding to the radial hole, and the other end of the sliding block is an inclined plane; one side of the fixed seat, which is close to the inclined plane, is provided with a vertical hole, and a vertical rod is inserted in the vertical hole in a vertically movable manner; one end of the vertical rod is provided with a wedge-shaped structure matched with the inclined plane, and the other end of the vertical rod is connected with an upper template; the upper template is connected with the lower template through a plurality of telescopic guide assemblies.

This blast pipe mould that punches passes through the terrace die that punches and the setting of the subassembly that punches can punch a plurality of holes simultaneously on waiting to punch the outer circumference of pipe fitting, and the synchronism of punching is good, efficient, and mould overall structure is simple compact moreover, easily fixes and the dress card.

The punching ejector pins are arranged in one-to-one correspondence with the radial holes in the punching male die, and the diameter of each punching ejector pin is slightly smaller than that of each radial hole, so that a plurality of holes can be simultaneously and accurately punched at one time;

the sliding block can horizontally move in the fixed seat to drive the punching thimble to move towards the radial hole; the inclined surface is matched with the wedge-shaped structure of the vertical rod, so that when the vertical rod moves downwards along the vertical hole, the sliding block can be pushed to move horizontally towards the punching male die;

the vertical rods and the fixed seat are matched with the sliding block synchronously, so that the purpose of pressing down and synchronously punching horizontal holes in the die is achieved.

Furthermore, a plurality of limiting columns are arranged between the upper template and the lower template, and the height of each limiting column is greater than that of the corresponding vertical rod. The limiting column can limit the descending position of the upper template, the situation that the upper template is excessively descended to cause the vertical rod to be excessively pushed by the sliding block is avoided, the punching thimble is excessively stretched into the sliding block, and punching errors and rejection rate are reduced.

Further, the punching male die comprises an upper cylinder and a lower cylinder which are coaxially arranged, the lower cylinder is in threaded connection with the lower template, and the upper cylinder is connected with a pipe fitting to be punched; the diameter of the lower cylinder is larger than that of the upper cylinder, and the outer diameter of the upper cylinder is matched with the inner diameter of the pipe fitting to be punched; the outer circumference of the upper cylinder is uniformly provided with the radial holes, and the radial holes penetrate through the upper cylinder.

Through the arrangement of the structure, the punching male die can be stably installed on the lower die plate, and on the other hand, the punching male die can be conveniently connected and fixed with a pipe fitting to be punched and can punch holes in the circumferential direction.

Preferably, the end of the upper cylinder has a rounded chamfer. The pipe fitting to be punched is convenient to sleeve.

Furthermore, a chip removal hole which penetrates through the axial direction is formed in the central axis of the punching male die. The scrap generated by punching can be discharged from the lower part of the scrap discharging hole, and the scrap accumulation is avoided, so that the punching precision and accuracy of subsequent pipe fittings are influenced.

Furthermore, one end of the fixed seat close to the punching male die is of a trapezoidal structure with the gradually smaller head size, and the other end of the fixed seat is provided with the vertical hole; the fixing seat is provided with a horizontal through groove along the length direction, and the horizontal through groove is intersected with the vertical hole; the sliding block is positioned in the horizontal through groove, and the upper side and the lower side of the horizontal through groove are respectively symmetrically provided with sliding grooves; the upper side and the lower side of the sliding block are respectively provided with a bulge, and the bulges are positioned in the sliding grooves; at least one of the sliding grooves is internally provided with a spring which is clamped and fixed on the protrusion.

By adopting the structure, the sliding block can directionally slide along the horizontal through groove, and can return to the original position under the action of the spring when no external force is applied; the spout protruding with the cooperation of spring has played the effect of automatic spacing and return, has improved the practicality and the convenience of the subassembly that punches.

Furthermore, the fixed seat comprises a first connecting seat, a second connecting seat and a cover plate which are in threaded connection with each other, and the cover plate is arranged above the second connecting seat; a first rectangular groove is formed in the position, close to the second connecting seat, of the first connecting seat, a second rectangular groove is formed in one side, close to the first connecting seat, of the cover plate, and the vertical hole is formed in the intersection of the first rectangular groove, the second rectangular groove and the second connecting seat; the horizontal through groove is formed between the second connecting seat and the cover plate, and the sliding groove is formed in the position, corresponding to the cover plate, of the second connecting seat.

The fixing seat structure formed by assembling three parts reduces the difficulty of integral production and processing of the fixing seat, and is beneficial to forming a sliding groove in the fixing seat; and three components with different sizes can be replaced and combined according to different travel requirements, so that the application range is widened.

Furthermore, the number of the fixing seats is five, the fixing seats are uniformly distributed on the outer side of the outer circumference of the punching male die in sequence, and the heads of the five fixing seats are abutted in sequence; and the included angle of the horizontal central axis of the adjacent fixed seat is 36 degrees.

Further, at least one be equipped with the pipe on the fixing base and support the clamp, the pipe supports the clamp including the spiro union in mount pad on the fixing base, one side of mount pad is equipped with the arc arch, the bellied both sides spiro union of arc has a pair of splint.

The pipe supporting clamp can effectively clamp bent pipe fittings and is matched with the connecting and fixing effect of the punching male die, various bent pipe fittings can be effectively and stably fixed, and the punching precision and accuracy are improved.

Furthermore, the telescopic guide assembly comprises a guide post, one end of the guide post is in threaded connection with the lower template through a lower mounting seat, the other end of the guide post is sleeved in a guide sleeve, and the guide sleeve is in threaded connection with the lower portion of the upper template.

Furthermore, the upper template is connected with a moving plate, and the moving plate is connected with an external driving motor, a driving cylinder or a hydraulic cylinder. That is, the external driving device can drive the moving plate and the upper die plate to move up and down, so as to achieve the purposes of opening and closing the die and pressing down for punching.

This blast pipe mould that punches's a working method does: raising the upper template, wherein the punching thimble and the sliding block are in original positions under the action of the spring, and the punching thimble corresponds to the radial holes one by one; sleeving one end of the pipe fitting to be punched on the punching male die, and clamping the other end of the pipe fitting to be punched on the pipe supporting clamp and fixing the pipe fitting; the upper template is controlled to move downwards, the vertical rod moves downwards along the vertical hole, the wedge-shaped structure extrudes the inclined surface of the sliding block to push the sliding block to move horizontally towards the punching male die, and the punching thimble props against the outer wall of the pipe fitting and further moves into the radial hole under the action of continuous extrusion force until punching is finished (at the moment, the spring is in a compressed state); at the moment, the upper template stops being pressed downwards continuously (the limiting columns prevent the lower template from being pressed downwards for multiple degrees), the upper template starts to rise upwards, and the vertical rods also rise along with the upper template; the extrusion force of the sliding block gradually disappears, the sliding block and the punching thimble are driven to move back under the return action of the spring, and the punching thimble horizontally moves out of the punched pipe fitting; and taking down the punched pipe fitting, clamping the next pipe fitting, and repeating the actions to punch again. The whole punching process is simple and quick, a plurality of holes can be formed at the same time, and the machining efficiency is high.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the exhaust pipe punching die is matched with the punching male die and the punching assembly, a plurality of holes can be punched on the outer circumference of a pipe fitting to be punched at the same time, punching synchronism is good, efficiency is high, and the die is simple and compact in overall structure and easy to fix and clamp; 2. the limiting column can limit the descending position of the upper template, so that the vertical rod is prevented from excessively pushing the sliding block due to excessive descending, the punching thimble is prevented from excessively extending into the sliding block, and punching errors and rejection rate are reduced; 3. the sliding groove, the bulge and the spring are matched to play a role in automatic limiting and returning, the punching thimble can be automatically withdrawn after the hole is punched, and the practicability and the convenience of the punching assembly are improved; 4. the pipe supporting clamp can effectively clamp bent pipe fittings and is matched with the connecting and fixing effect of the punching male die, various bent pipe fittings can be effectively and stably fixed, and the punching precision and accuracy are improved.

Drawings

Fig. 1 is a schematic view of the overall structure of an exhaust pipe punching die of the present invention;

fig. 2 is a schematic view of the arrangement of the lower template of the exhaust pipe punching die of the present invention;

fig. 3 is a schematic perspective view of a fixing seat of the exhaust pipe punching mold of the present invention;

fig. 4 is a schematic view of a three-dimensional explosion structure of a fixing seat of the exhaust pipe punching die of the present invention;

fig. 5 is a schematic cross-sectional view of the punching assembly of the exhaust pipe punching die of the present invention matching with the vertical rod;

fig. 6 is a schematic view of a three-dimensional structure of a punching male die of the exhaust pipe punching die of the present invention;

fig. 7 is a schematic perspective view of a pipe supporting clip of the exhaust pipe punching mold according to the present invention;

FIG. 8 is a schematic structural view of the exhaust pipe punching mold clamping pipe fitting for punching;

in the figure: 1. a work table; 2. a lower template; 3. punching a male die; 301. a lower cylinder; 302. an upper cylinder; 303. chip removal holes; 4. a fixed seat; 401. a first connecting seat; 402. a second connecting seat; 403. a cover plate; 5. a vertical rod; 501. a wedge-shaped structure; 6. a slider; 601. a bevel; 7. punching a thimble; 8. a radial bore; 9. a pipe fitting; 10. a tube support clip; 1001. a mounting seat; 1002. an arc-shaped bulge; 1003. a splint; 11. a limiting column; 12. mounting a template; 13. a motion plate; 14. a guide post; 15. a lower mounting seat; 16. a guide sleeve; 17. a vertical hole; 18. a horizontal through groove; 19. a chute; 20. a first rectangular groove; 21. a second rectangular groove; 22. a protrusion; 23. a spring.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The first embodiment is as follows:

as shown in fig. 1 to 5, the exhaust pipe punching die comprises a workbench 1, wherein a lower template 2 is screwed on the workbench 1, a punching male die 3 is arranged in the middle of the lower template 2, and a plurality of radial holes 8 are uniformly distributed on the outer circumference of the punching male die 3; a plurality of punching components are arranged around the punching male die 3; the punching assembly comprises a fixed seat 4 fixedly arranged on the lower template 2, a horizontally moving sliding block 6 is arranged in the fixed seat 4, one end, close to the punching male die 3, of the sliding block 6 is connected with a punching thimble 7, the punching thimble 7 is arranged corresponding to the radial hole 8, and the other end of the sliding block 6 is an inclined plane 601; a vertical hole 17 is formed in one side, close to the inclined surface 601, of the fixed seat 4, and a vertical rod 5 is inserted into the vertical hole 17 in a vertically movable manner; one end of the vertical rod 5 is provided with a wedge-shaped structure 501 (shown in figure 5) matched with the inclined surface 601, and the other end of the vertical rod is connected with an upper template 12; the upper template 12 is connected with the lower template 2 through a plurality of telescopic guide components.

This blast pipe mould that punches passes through punch terrace die 3 and the setting of the subassembly that punches can punch a plurality of holes simultaneously on waiting to punch the outer circumference of pipe fitting, and the synchronism of punching is good, efficient, and mould overall structure is simple compact moreover, easily fixes and the dress card.

Preferably, the number of the fixing seats 4 is five, the fixing seats are sequentially and uniformly distributed on the outer side of the outer circumference of the punching male die 3, and the heads of the five fixing seats 4 are sequentially abutted; and the included angle of the horizontal central axis of the adjacent fixed seat 4 is 36 degrees. The middle fixed seat 4 is provided with a pipe supporting clamp 10.

The number of the punching thimbles 7 is five, the five thimble holes are respectively arranged in one-to-one correspondence with the radial holes 8 on the punching male die 3, and the diameter of each punching thimble 7 is slightly smaller than that of each radial hole 8, so that a plurality of holes can be simultaneously and accurately punched at one time;

furthermore, four limiting columns 11 are arranged between the upper template 12 and the lower template 2, and the height of each limiting column 11 is greater than the length of the corresponding vertical rod 5. The limiting column 11 can limit the descending position of the upper template 12, so that the vertical rod 5 is prevented from excessively pushing downwards, the sliding block 6 is prevented from excessively stretching into the punching thimble 7, and punching errors and rejection rate are reduced.

Furthermore, one end of the fixed seat 4, which is close to the punching male die 3, is of a trapezoidal structure with a gradually smaller head size, and the other end is provided with the vertical hole 17; as shown in fig. 5, the fixing seat 4 is provided with a horizontal through groove 18 along the length direction, and the horizontal through groove 18 intersects with the vertical hole 17; the slide block 6 is positioned in the horizontal through groove 18, and the upper side and the lower side of the horizontal through groove 18 are respectively symmetrically provided with a slide groove 19; the upper side and the lower side of the sliding block 6 are respectively provided with a bulge 22, and the bulges 22 are positioned in the sliding grooves 19; at least one of the slide grooves 19 is provided with a spring 23, and the spring 23 is clamped and fixed on the protrusion 22.

With the arrangement of the structure, the sliding block 6 can directionally slide along the horizontal through groove 18, and when no external force is applied, the sliding block 6 can return to the original position under the action of the spring 23; the sliding groove 19, the protrusion 22 and the spring 23 are matched to achieve the automatic limiting and returning functions, and the practicability and the convenience of the punching assembly are improved.

Further, as shown in fig. 3 and 4, the fixing base 4 includes a first connecting base 401, a second connecting base 402 and a cover plate 403 that are screwed to each other, and the cover plate 403 is disposed above the second connecting base 402; a first rectangular groove 20 is formed in the first connecting seat 401 near the second connecting seat 402, a second rectangular groove 21 is formed in one side of the cover plate 403 near the first connecting seat 401, and the vertical hole 17 is formed at the intersection of the first rectangular groove 20, the second rectangular groove 21 and the second connecting seat 402; the horizontal through groove 18 is formed between the second connecting seat 402 and the cover plate 403, and the sliding groove 19 is formed at the corresponding position of the second connecting seat 402 and the inner side of the cover plate 403.

The fixing seat structure formed by assembling three parts is adopted, so that the difficulty in integral production and processing of the fixing seat 4 is reduced, and the sliding groove 19 is favorably formed in the fixing seat; and three components with different sizes can be replaced and combined according to different travel requirements, so that the application range is widened.

Further, the telescopic guide assembly comprises a guide column 14, one end of the guide column 14 is screwed on the lower template 2 through a lower mounting seat 15, the other end of the guide column is sleeved in a guide sleeve 16, and the guide sleeve 16 is screwed below the upper template 12.

Furthermore, the upper die plate 12 is connected with a moving plate 13, and the upper die plate 12 is driven to move up and down by controlling the up-and-down movement of the moving plate 13, so that the purposes of opening and closing the die and pressing down for punching are achieved.

Example two:

the present embodiment is different from the first embodiment in that a structure of a punching male die is provided.

Specifically, as shown in fig. 6, the punching male die 3 includes an upper cylinder 302 and a lower cylinder 301 which are coaxially arranged, the lower cylinder 301 is screwed on the lower template 2, and the upper cylinder 302 is connected with a pipe to be punched; the diameter of the lower cylinder 301 is larger than that of the upper cylinder 302, and the outer diameter of the upper cylinder 302 is matched with the inner diameter of a pipe fitting to be perforated; the radial holes 8 are uniformly distributed on the outer circumference of the upper cylinder 302, and the radial holes 8 penetrate through the upper cylinder 302.

Through the arrangement of the structure, the punching male die 3 can be stably installed on the lower die plate 2, and can be conveniently connected and fixed to a pipe fitting to be punched and punch in the circumferential direction.

Preferably, the end of the upper cylinder 302 has a rounded chamfer. The pipe fitting to be punched is convenient to sleeve.

Furthermore, a chip removal hole 303 which penetrates through the central axis of the punching convex die 3 in the axial direction is arranged on the central axis. The scraps generated by punching can be discharged from the lower part through the scrap discharge holes 303, so that the scraps are prevented from being accumulated, and the punching precision and accuracy of subsequent pipe fittings are influenced.

Example three:

the present embodiment differs from the first embodiment in that a structure of a tube support clip is provided.

Specifically, as shown in fig. 7, the pipe supporting clip 10 includes a mounting seat 1001 screwed on the fixing seat 4, an arc protrusion 1002 is disposed on one side of the mounting seat 1001, and a pair of clamping plates 1003 is screwed on two sides of the arc protrusion 1002.

The pipe supporting clamp 10 can effectively clamp bent pipe fittings and is matched with the connecting and fixing effect of the punching male die 3, various bent pipe fittings can be effectively and stably fixed, and punching precision and accuracy are improved.

Example four:

this embodiment provides the mode that the blast pipe mould dress card pipe fitting that punches in the embodiment one punches.

Raising the upper template 12, wherein the punching thimble 7 and the sliding block 6 are in original positions under the action of the spring 23, and the punching thimble 7 corresponds to the radial holes 8 one by one;

as shown in fig. 8 and fig. 5, one end of a bent pipe 9 is sleeved on the punching male die 3, and the other end is clamped on the pipe supporting clamp 10 and fixed; controlling the upper template 12 to move downwards, enabling the vertical rod 5 to move downwards along the vertical hole 17, enabling the wedge-shaped structure 501 to extrude the inclined surface 601 of the sliding block 6, pushing the sliding block 6 to move horizontally towards the punching male die 3, enabling the punching thimble 7 to abut against the outer wall of the pipe 9 and further move towards the radial hole 8 under the action of continuous extrusion force until punching is completed (at the moment, the spring 23 is in a compressed state); at this time, the upper template 12 stops being pressed continuously and starts to rise upwards, and the vertical rod 5 also rises along with the upper template; the extrusion force of the sliding block 6 gradually disappears, and under the return action of the spring 23, the sliding block 6 and the punching thimble 7 are driven to move back, and the punching thimble 7 horizontally moves out of the punched pipe 9; and taking down the punched pipe fitting 9, clamping the next pipe fitting, and repeating the above actions to punch again. The whole punching process is simple and quick, a plurality of holes can be formed at the same time, and the machining efficiency is high.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The exhaust pipe punching die is characterized by comprising a workbench, wherein a lower die plate is screwed on the workbench, a punching male die is arranged in the middle of the lower die plate, and a plurality of radial holes are uniformly distributed in the outer circumference of the punching male die; a plurality of punching assemblies are arranged on the periphery of the punching male die; the punching assembly comprises a fixed seat fixedly arranged on the lower template, a horizontally moving sliding block is arranged in the fixed seat, one end, close to the punching male die, of the sliding block is connected with a punching thimble, the punching thimble is arranged corresponding to the radial hole, and the other end of the sliding block is an inclined plane; one side of the fixed seat, which is close to the inclined plane, is provided with a vertical hole, and a vertical rod is inserted in the vertical hole in a vertically movable manner; one end of the vertical rod is provided with a wedge-shaped structure matched with the inclined plane, and the other end of the vertical rod is connected with an upper template; the upper template is connected with the lower template through a plurality of telescopic guide assemblies.

2. The exhaust pipe punching die of claim 1, wherein a plurality of limiting columns are arranged between the upper die plate and the lower die plate, and the height of each limiting column is greater than that of the corresponding vertical rod.

3. The exhaust pipe punching die according to claim 1, wherein the punching male die comprises an upper cylinder and a lower cylinder which are coaxially arranged, the lower cylinder is screwed on the lower template, and the upper cylinder is connected with a pipe fitting to be punched; the diameter of the lower cylinder is larger than that of the upper cylinder, and the outer diameter of the upper cylinder is matched with the inner diameter of the pipe fitting to be punched; the outer circumference of the upper cylinder is uniformly provided with the radial holes, and the radial holes penetrate through the upper cylinder.

4. The exhaust pipe punching die according to claim 1 or 3, wherein a central axis of the punching male die is provided with a chip removal hole which penetrates axially.

5. The exhaust pipe punching die according to claim 1, wherein one end of the fixing seat close to the punching male die is of a trapezoidal structure with a gradually smaller head size, and the other end of the fixing seat is provided with the vertical hole; the fixing seat is provided with a horizontal through groove along the length direction, and the horizontal through groove is intersected with the vertical hole; the sliding block is positioned in the horizontal through groove, and the upper side and the lower side of the horizontal through groove are respectively symmetrically provided with sliding grooves; the upper side and the lower side of the sliding block are respectively provided with a bulge, and the bulges are positioned in the sliding grooves; at least one of the sliding grooves is internally provided with a spring which is clamped and fixed on the protrusion.

6. The exhaust pipe punching die according to claim 5, wherein the fixing seat comprises a first connecting seat, a second connecting seat and a cover plate which are in threaded connection with each other, and the cover plate is arranged above the second connecting seat; a first rectangular groove is formed in the position, close to the second connecting seat, of the first connecting seat, a second rectangular groove is formed in one side, close to the first connecting seat, of the cover plate, and the vertical hole is formed in the intersection of the first rectangular groove, the second rectangular groove and the second connecting seat; the horizontal through groove is formed between the second connecting seat and the cover plate, and the sliding groove is formed in the position, corresponding to the cover plate, of the second connecting seat.

7. The exhaust pipe punching die according to claim 1, wherein the number of the fixing seats is five, the fixing seats are uniformly distributed on the outer side of the outer circumference of the punching male die in sequence, and the heads of the five fixing seats are abutted in sequence; and the included angle of the horizontal central axis of the adjacent fixed seat is 36 degrees.

8. The exhaust pipe punching die according to claim 1, wherein at least one of the fixing seats is provided with a pipe supporting clip, the pipe supporting clip comprises a mounting seat screwed on the fixing seat, one side of the mounting seat is provided with an arc-shaped protrusion, and two sides of the arc-shaped protrusion are screwed with a pair of clamping plates.

9. The exhaust pipe punching die according to claim 1, wherein the telescopic guide assembly comprises a guide post, one end of the guide post is in threaded connection with the lower template through a lower mounting seat, the other end of the guide post is sleeved in a guide sleeve, and the guide sleeve is in threaded connection with the lower portion of the upper template.

10. The exhaust pipe punching die according to claim 1, wherein a moving plate is connected to the upper die plate, and the moving plate is connected to an external driving motor, a driving cylinder or a hydraulic cylinder.