CN220781933U - Stamping device for manufacturing automobile body fittings - Google Patents

Abstract

The utility model discloses a stamping device for manufacturing automobile body parts, which comprises a stamping table, wherein the bottom of the stamping table is fixedly connected with a plurality of supporting legs, the top of the stamping table is provided with a lower die, the lower die is provided with a stamping groove, both sides of the lower die are provided with buffer mechanisms, the rear side of the lower die is provided with a fixing frame, the fixing frame is fixedly connected with the stamping table, the side surface of the fixing frame is L-shaped, the fixing frame is provided with a stamping mechanism, and the bottom of the stamping table is provided with an ejection mechanism. Compared with the traditional clamping and fixing mode, the automobile body accessory can be positioned through negative pressure formed by vacuum, the automobile body accessory is not required to be in direct contact with the automobile body accessory, the automobile body accessory is applicable to automobile body accessories of different sizes, additional customization is not required, buffering can be carried out during stamping processing, rigid collision between dies is reduced, and in addition, demoulding and discharging of finished stamping parts can be completed without manual taking out.

Description

Stamping device for manufacturing automobile body fittings

Technical Field

The utility model belongs to the technical field of stamping of automobile parts, and particularly relates to a stamping device for manufacturing automobile body parts.

Background

The automobile accessory stamping parts are stamping parts for forming the whole automobile and serving the automobile. The manufacturing and processing of automobile body parts is carried out by utilizing the power of conventional or special stamping equipment to directly subject the plate material to deformation force in a die and deform the plate material, so that the production technology of product parts with certain shapes, sizes and performances is obtained.

The stamping device on the market at present is of various types, for example, a stamping device for automobile parts is disclosed on the China patent net, the publication number of which is CN215786217U, and the stamping device can be used for stamping automobile body parts, but has some defects and defects to be improved: (1) When the automobile body fittings are stamped, the fittings are required to be positioned so as to avoid displacement of the fittings in the stamping process, the existing stamping device is used for positioning the fittings in a clamping mode, at the moment, the surfaces of the fittings are required to be in direct contact with the clamping pieces, so that abrasion is easily generated due to extrusion and collision, the clamping pieces are relatively fixed in size, the stamping device is difficult to be suitable for positioning of the automobile body fittings with different sizes, and the clamping pieces with different sizes are required to be additionally customized; (2) In order to reduce rigid collision between dies when the existing stamping devices are used for stamping the car body fittings, the buffer structures such as springs are often used for buffering, but most of the existing stamping devices are of integrated structures, so that the buffer structures are difficult to disassemble, and the buffer structures are inconvenient to replace when damaged due to long-time stress; (3) After the stamping processing is finished, the finished product is required to be taken out of the die, but after the stamping processing is finished, the finished product is often clamped in the die and is difficult to take out in a manual mode, and although the existing stamping devices can be used for completing demolding through arranging an ejection structure, the existing stamping devices can be in direct contact with the finished product in the ejection process, so that the surface of the finished product is easy to wear. Therefore, the press device for manufacturing automobile body parts provided by the utility model has important significance in view of the above problems.

Disclosure of Invention

The utility model provides a stamping device for manufacturing automobile body parts, which can firmly adsorb and fix the automobile body parts on a lower die through negative pressure formed by vacuum to play a role in positioning, compared with the traditional clamping and fixing mode, the stamping device does not need to be in direct contact with the automobile body parts, thereby effectively avoiding abrasion caused by extrusion and collision on the surfaces of the parts, and can cover the automobile body parts with different sizes through a plurality of air holes, so that the automobile body parts with different sizes can shade the air holes with different numbers, and the automobile body parts with different sizes can be positioned without additional customization, thereby greatly improving the applicability of the stamping device and effectively saving the cost; the buffer mechanism can play a role in buffering so as to effectively reduce rigid collision between the stamping mechanism and the lower die, and when the buffer mechanism is damaged due to long-time stress, the buffer mechanism can be integrally disassembled so as to be replaced; the finished product after stamping can be ejected out of the stamping groove through the ejection mechanism so as to finish demoulding operation of the finished product without manual taking out, so that the discharging efficiency is greatly improved, and the anti-wear protection effect can be achieved by utilizing each anti-wear block so as to prevent collision and wear caused by direct contact between the bottom of the automobile body accessory and the ejection plate, thus solving the problems in the background art.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a stamping device for manufacturing automobile body parts, which comprises a stamping table, wherein the bottom of the stamping table is fixedly connected with a plurality of supporting legs, the top of the stamping table is provided with a lower die, the lower die is provided with a stamping groove, both sides of the lower die are provided with buffer mechanisms, the rear side of the lower die is provided with a fixing frame, the fixing frame is fixedly connected with the stamping table, the side surface of the fixing frame is L-shaped, the fixing frame is provided with a stamping mechanism, and the bottom of the stamping table is provided with an ejection mechanism;

the stamping mechanism comprises a first electric telescopic rod, the first electric telescopic rod is arranged at the top of the fixing frame, the bottom end of an output shaft of the first electric telescopic rod is fixedly connected with a stamping plate, and an upper die is arranged at the bottom of the stamping plate;

the ejection mechanism comprises an installation frame, the installation frame is fixedly connected to the bottom of the stamping table, a second electric telescopic rod is installed in the installation frame, and the top end of an output shaft of the second electric telescopic rod penetrates through the bottoms of the stamping table and the lower die respectively and is fixedly connected with an ejection plate.

Further, the vacuum cavity has all been seted up to the both sides of bed die, a plurality of bleed hole has been seted up at the top of vacuum cavity, the bleed hole is linear array and distributes, the both sides of bed die all are provided with the vacuum pump, the vacuum pump is installed on the punching press bench, just install the exhaust tube on the vacuum pump, the other end mouth of pipe fixed connection of exhaust tube is linked together at the lateral wall of bed die and with the vacuum cavity.

Further, buffer gear includes the buffer frame, the side of buffer frame is n font, and a plurality of mounting hole has all outwards been seted up to its both sides bottom, just the top fixedly connected with of buffer frame a plurality of springs, the top fixedly connected with buffer plate of spring, the top surface of buffer plate is provided with a plurality of buffer block, the buffer block is hemisphere rubber block structure to be the linear equidistance along buffer plate's width direction and distribute, the top fixedly connected with of punching press platform a plurality of double-screw bolts, the quantity of double-screw bolts is the same with the mounting hole, and its diameter equals with the aperture of mounting hole, and each the center of double-screw bolt corresponds with the center of each mounting hole respectively, every equal threaded connection has rather than matched with nut on the double-screw bolt.

Further, the bottom both sides of buffer board are all fixedly connected with gag lever post, the both sides outer wall of buffer frame is all fixedly connected with connecting block, the terminal fixedly connected with sleeve pipe of connecting block, the inside diameter of sleeve pipe equals with the pole footpath of gag lever post, the gag lever post passes corresponding sleeve pipe.

Further, the inner walls of the two sides of the buffer frame are fixedly connected with reinforcing blocks, the reinforcing blocks are triangular block structures, and the tops of the reinforcing blocks are fixedly connected to the inner walls of the tops of the buffer frame.

Further, the upper die is located right above the punching groove, the width of the upper die is equal to the groove width of the punching groove, and a layer of wear-resistant pad is arranged on the bottom surface of the upper die.

Further, the ejector plate is located in the punching groove, the width of the ejector plate is equal to the groove width of the punching groove, a plurality of anti-abrasion blocks are arranged on the top surface of the ejector plate, and the anti-abrasion blocks are of cylindrical rubber block structures and distributed in a linear array.

Compared with the prior art, the utility model has the following beneficial effects:

(1) When the stamping device is used, the automobile body fittings can be firmly adsorbed and fixed on the lower die through negative pressure formed by vacuum, so that the positioning function is realized, compared with the traditional clamping and fixing mode, the automobile body fittings do not need to be in direct contact with the automobile body fittings, so that the abrasion of the surfaces of the fittings due to extrusion and collision is effectively avoided, the automobile body fittings with different sizes can be covered through the plurality of air suction holes, the automobile body fittings with different sizes can shield the air suction holes with different numbers, the automobile body fittings with different sizes can be positioned, and additional customization is not needed, so that the applicability of the stamping device is greatly improved, and the cost is effectively saved;

(2) When the stamping device is used, the buffer mechanism can play a role in buffering so as to effectively reduce rigid collision between the stamping mechanism and the lower die, and when the buffer mechanism is damaged due to long-time stress, the buffer mechanism can be integrally disassembled so as to be replaced;

(3) When the stamping device is used, the finished product after stamping can be ejected out of the stamping groove through the ejection mechanism so as to finish demoulding operation of the finished product without manual removal, so that the discharging efficiency is greatly improved, and each anti-abrasion block can play a role of anti-abrasion protection so as to prevent collision and abrasion caused by direct contact between the bottom of a vehicle body accessory and the ejection plate.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a press device for manufacturing an automobile body part according to the present utility model;

FIG. 2 is a schematic perspective view of a stamping table according to the present utility model;

FIG. 3 is a schematic diagram of a three-dimensional structure of a lower mold and a vacuum pump according to the present utility model;

FIG. 4 is a front cross-sectional view of a lower mold and a vacuum pump according to the present utility model;

FIG. 5 is a schematic perspective view of a buffer mechanism according to the present utility model;

FIG. 6 is a side view of the structure of the cushioning mechanism of the present utility model;

FIG. 7 is a schematic perspective view of a stamping mechanism according to the present utility model;

fig. 8 is a schematic perspective view of an ejector mechanism according to the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. a stamping table; 2. support legs; 3. a lower die; 4. stamping a groove; 5. a fixing frame; 6. a first electric telescopic rod; 7. a stamping plate; 8. an upper die; 9. a mounting frame; 10. a second electric telescopic rod; 11. an ejector plate; 12. a vacuum chamber; 13. an air suction hole; 14. a vacuum pump; 15. an exhaust pipe; 16. a buffer frame; 17. a mounting hole; 18. a spring; 19. a buffer plate; 20. a buffer block; 21. a stud; 22. a nut; 23. a limit rod; 24. a connecting block; 25. a sleeve; 26. a reinforcing block; 27. an abrasion-proof pad; 28. and (5) an abrasion-proof block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "opposite," "one end," "interior," "transverse," "end," "both ends," "two sides," "front," "one end face," "the other end face," and the like indicate orientations or positional relationships, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the components or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-8, the stamping device for manufacturing automobile body parts of the utility model comprises a stamping table 1, wherein the bottom of the stamping table 1 is fixedly connected with a plurality of supporting legs 2, the top of the stamping table is provided with a lower die 3, the lower die 3 is provided with a stamping groove 4, both sides of the stamping groove are provided with buffer mechanisms, the rear side of the lower die 3 is provided with a fixing frame 5, the fixing frame 5 is fixedly connected to the stamping table 1, the side of the fixing frame 5 is L-shaped, the fixing frame 5 is provided with a stamping mechanism, and the bottom of the stamping table 1 is provided with an ejection mechanism;

the stamping mechanism comprises a first electric telescopic rod 6, the first electric telescopic rod 6 is arranged at the top of the fixed frame 5, the bottom end of an output shaft of the first electric telescopic rod is fixedly connected with a stamping plate 7, an upper die 8 is arranged at the bottom of the stamping plate 7, the stamping plate 7 and the upper die 8 can be driven to move downwards by driving the first electric telescopic rod 6, when the upper die 8 is contacted with an automobile body fitting on the lower die 3, the automobile body fitting can be deformed in the stamping groove 4 by utilizing the pressure exerted by the upper die 8, and thus a stamping part finished product with a required shape can be obtained;

the ejection mechanism includes mounting bracket 9, mounting bracket 9 fixed connection is in the bottom of punching press platform 1, its internally mounted has second electric telescopic handle 10, the output shaft top of second electric telescopic handle 10 runs through the bottom of punching press platform 1 and bed die 3 respectively and fixedly connected with ejector plate 11, can drive ejector plate 11 through driving second electric telescopic handle 10 and upwards move, after the punching press is accomplished to the automobile body accessory, utilize ejector plate 11 can be with the ejecting punching press groove 4 of finished product, so as to accomplish the drawing of patterns operation of finished product, and need not manual the taking out, thereby improved the efficiency of ejection of compact greatly.

Wherein vacuum cavity 12 has all been seted up to the both sides of bed die 3, a plurality of air vent 13 has been seted up at the top of vacuum cavity 12, air vent 13 is linear array distribution, the both sides of bed die 3 all are provided with vacuum pump 14, vacuum pump 14 installs on punching press platform 1, and install exhaust tube 15 on vacuum pump 14, the other end mouth of pipe fixed connection of exhaust tube 15 is in the lateral wall of bed die 3 and be linked together with vacuum cavity 12, when the auto body accessory that waits to punch is placed on bed die 3, can be evacuated vacuum cavity 12 and each air vent 13 in through driving vacuum pump 14, the negative pressure that utilizes the vacuum to form can firmly adsorb the auto body accessory and fix on bed die 3 this moment, compared with traditional centre gripping fixed mode need not with auto body accessory direct contact, thereby the accessory surface has effectively been avoided wearing and tearing because of extrusion and collision, and auto body accessory of different sizes can cover the auto body accessory of different sizes, make the auto body accessory of different sizes shelter from different quantity of air vent 13, so that to do not need to customize the device to carry out for the difference, thereby the high-efficient stamping device has been improved, the practicality is realized, and the cost is saved.

Wherein the buffer mechanism comprises a buffer frame 16, the side surfaces of the buffer frame 16 are n-shaped, the bottom ends of the two sides of the buffer frame are outwards protruded and provided with a plurality of mounting holes 17, the top of the buffer frame 16 is fixedly connected with a plurality of springs 18, the top end of each spring 18 is fixedly connected with a buffer plate 19, the top surface of each buffer plate 19 is provided with a plurality of buffer blocks 20, each buffer block 20 is of a hemispherical rubber block structure and is distributed in a linear equidistant manner along the width direction of each buffer plate 19, when a vehicle body accessory is punched through the punching mechanism, the punching plate 7 is contacted with the corresponding buffer plate 19, the buffer plates 19 move downwards after being stressed and compress the springs 18, at the moment, the buffer blocks 20 can play a role of buffering by utilizing the elastic reset effect of the springs 18 so as to effectively reduce rigid collision between the punching mechanism and the lower die 3, the buffer blocks 20 have elasticity and can generate certain elastic deformation after being extruded, so as to effectively decompose and absorb the pressure applied by the stamping plate 7, and play a role of preventing abrasion and wear caused by direct contact between the buffer plate 19 and the stamping plate 7, a plurality of studs 21 are fixedly connected to the top of the stamping table 1, the number of the studs 21 is the same as that of the mounting holes 17, the diameter of the studs is equal to that of the mounting holes 17, the centers of the studs 21 respectively correspond to the centers of the mounting holes 17, each stud 21 is in threaded connection with a nut 22 matched with the stud 21, each stud 21 can be aligned and pass through the mounting holes 17 on two sides of the buffer frame 16, at the moment, the nuts 22 are in threaded connection with each stud 21, the whole buffer mechanism can be fixedly mounted on the stamping table 1 through the mutual matching between the studs 21 and the nuts 22, and when the buffer mechanism is damaged due to long-time stress, the buffer mechanism can be detached by screwing down the nuts 22, so as to replace it.

Wherein, the equal fixedly connected with gag lever post 23 in the bottom both sides of buffer board 19, the equal fixedly connected with connecting block 24 of both sides outer wall of buffer frame 16, the terminal fixedly connected with sleeve pipe 25 of connecting block 24, the internal diameter of sleeve pipe 25 equals with gag lever post 23's pole footpath, gag lever post 23 passes corresponding sleeve pipe 25, buffer board 19 can drive gag lever post 23 and remove along sleeve pipe 25 together after the atress, utilize the effect that can play spacing mutually supporting between gag lever post 23 and the sleeve pipe 25 this moment to improve the stability of buffer board 19, thereby prevent that it from taking place the slope and skew and influence the effect of buffering after the pressurized.

Wherein, the equal fixedly connected with of both sides inner wall of buffer frame 16 consolidates piece 26, consolidates piece 26 and is triangle-shaped piece structure, and its top fixed connection is at the top inner wall of buffer frame 16, can support and consolidate buffer frame 16 through consolidating piece 26 to improve buffer frame 16's structural strength, thereby prevent that buffer frame 16 from taking place deformation because of long-time atress.

Wherein, the upper die 8 is located directly over the punching slot 4, its width equals with the slot width of punching slot 4, and the bottom surface of upper die 8 is provided with one deck abrasionproof pad 27, and the elasticity material such as rubber is selected for use to the abrasionproof pad 27, when upper die 8 contacts with the automobile body accessory, can play the effect of abrasionproof protection to avoid the top of automobile body accessory and upper die 8 direct contact to produce collision and wearing and tearing.

Wherein, the ejector plate 11 is located in the punching groove 4, the width of the ejector plate is equal to the groove width of the punching groove 4, the top surface of the ejector plate 11 is provided with a plurality of anti-abrasion blocks 28, the anti-abrasion blocks 28 are of cylindrical rubber block structures and are distributed in a linear array, when the finished product of the punching part is ejected out of the punching groove 4 by the ejector plate 11, each anti-abrasion block 28 can be padded at the bottom of the finished product, and at the moment, the anti-abrasion block 28 can play a role in anti-abrasion protection so as to prevent the bottom of a vehicle body fitting from being in direct contact with the ejector plate 11 to generate collision and abrasion.

The working principle of the utility model is as follows:

when the utility model is used, firstly, the electric elements in the stamping device are externally connected with a control switch and a power supply through wires, then, the automobile body parts to be stamped are placed on the lower die 3, and the vacuum pump 14 is driven to evacuate the vacuum cavity 12 and the air in each air evacuating hole 13 through the air evacuating pipe 15, at the moment, the automobile body parts can be firmly adsorbed and fixed on the lower die 3 by utilizing the negative pressure formed by the vacuum to play a role in positioning, compared with the traditional clamping and fixing mode, the direct contact with the automobile body parts is not needed, thereby effectively avoiding the abrasion of the surfaces of the parts caused by extrusion and collision, and the automobile body parts with different sizes can be covered through the plurality of air evacuating holes 13, so that the automobile body parts with different sizes can be shielded from the air evacuating holes 13 with different sizes, the automobile body parts with different sizes can be positioned without additional customization, the applicability of the stamping device is greatly improved, the cost is effectively saved, after the positioning of the automobile body fittings is finished, the first electric telescopic rod 6 is driven to drive the stamping plate 7 to move downwards together with the upper die 8, when the upper die 8 contacts with the automobile body fittings on the lower die 3, the automobile body fittings can be deformed in the stamping groove 4 by the pressure applied by the upper die 8, thus stamping finished products with required shapes can be obtained, when the automobile body fittings are stamped, the stamping plate 7 contacts with the buffer plate 19, the buffer plate 19 moves downwards after being stressed and compresses the spring 18, at the moment, the elastic reset function of the spring 18 can play a role of buffering so as to effectively reduce the rigid collision between the stamping mechanism and the lower die 3, when the buffering mechanism is damaged due to long-time stress, the buffering mechanism can be detached by screwing down the nut 22, so as to change the finished product, after the stamping of the automobile body accessory is finished, the second electric telescopic rod 10 is driven to drive the ejector plate 11 to move upwards, the ejector plate 11 is utilized to eject the finished product out of the stamping groove 4 at the moment, so that the finished product demoulding operation is finished, manual removal is not needed, the discharging efficiency is greatly improved, the top surface of the ejector plate 11 is provided with a plurality of anti-abrasion blocks 28, when the ejector plate 11 is utilized to eject the stamped part out of the stamping groove 4, each anti-abrasion block 28 can be padded at the bottom of the finished product, and at the moment, the anti-abrasion blocks 28 can play the role of anti-abrasion protection so as to prevent the bottom of the automobile body accessory from being in direct contact with the ejector plate 11 to generate collision and abrasion.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims (7)

1. The stamping device for manufacturing the automobile body fittings is characterized by comprising a stamping table, wherein the bottom of the stamping table is fixedly connected with a plurality of supporting legs, the top of the stamping table is provided with a lower die, the lower die is provided with a stamping groove, both sides of the lower die are provided with buffer mechanisms, the rear side of the lower die is provided with a fixing frame which is fixedly connected with the stamping table, the side surface of the fixing frame is L-shaped, the fixing frame is provided with a stamping mechanism, and the bottom of the stamping table is provided with an ejection mechanism;

the stamping mechanism comprises a first electric telescopic rod, the first electric telescopic rod is arranged at the top of the fixing frame, the bottom end of an output shaft of the first electric telescopic rod is fixedly connected with a stamping plate, and an upper die is arranged at the bottom of the stamping plate;

the ejection mechanism comprises an installation frame, the installation frame is fixedly connected to the bottom of the stamping table, a second electric telescopic rod is installed in the installation frame, and the top end of an output shaft of the second electric telescopic rod penetrates through the bottoms of the stamping table and the lower die respectively and is fixedly connected with an ejection plate.

2. The stamping device for manufacturing automobile body parts according to claim 1, wherein vacuum cavities are formed in two sides of the lower die, a plurality of air suction holes are formed in the top of the vacuum cavities, the air suction holes are distributed in a linear array, vacuum pumps are arranged in two sides of the lower die, the vacuum pumps are arranged on the stamping table, an air suction pipe is arranged on the vacuum pumps, and the pipe orifice of the other end of the air suction pipe is fixedly connected to the side wall of the lower die and is communicated with the vacuum cavities.

3. The stamping device for manufacturing automobile body accessories according to claim 1, wherein the buffer mechanism comprises a buffer frame, the side surface of the buffer frame is n-shaped, the bottom ends of two sides of the buffer frame are outwards protruded and provided with a plurality of mounting holes, the top of the buffer frame is fixedly connected with a plurality of springs, the top of each spring is fixedly connected with a buffer plate, the top surface of each buffer plate is provided with a plurality of buffer blocks, the buffer blocks are of hemispherical rubber block structures and are distributed at equal intervals in a linear manner along the width direction of the buffer plate, the top of the stamping table is fixedly connected with a plurality of studs, the number of the studs is the same as that of the mounting holes, the diameter of each stud is equal to the diameter of each mounting hole, the center of each stud corresponds to the center of each mounting hole, and each stud is in threaded connection with a nut matched with the stud.

4. The stamping device for manufacturing automobile body parts according to claim 3, wherein limiting rods are fixedly connected to two sides of the bottom of the buffer plate, connecting blocks are fixedly connected to two outer walls of the two sides of the buffer frame, sleeves are fixedly connected to the tail ends of the connecting blocks, the inner diameters of the sleeves are equal to the rod diameters of the limiting rods, and the limiting rods penetrate through the corresponding sleeves.

5. The stamping device for manufacturing automobile body parts according to claim 3, wherein the inner walls of the two sides of the buffer frame are fixedly connected with reinforcing blocks, the reinforcing blocks are of triangular block structures, and the tops of the reinforcing blocks are fixedly connected to the inner walls of the tops of the buffer frame.

6. The stamping device for manufacturing automobile body parts according to claim 1, wherein the upper die is located right above the stamping groove, the width of the upper die is equal to the groove width of the stamping groove, and a layer of wear-resistant pad is arranged on the bottom surface of the upper die.

7. The stamping device for manufacturing automobile body parts according to claim 1, wherein the ejector plate is located in the stamping groove, the width of the ejector plate is equal to the groove width of the stamping groove, a plurality of anti-abrasion blocks are arranged on the top surface of the ejector plate, and the anti-abrasion blocks are of cylindrical rubber block structures and distributed in a linear array.