Metal plate stamping device

Abstract

The utility model relates to a sheet metal stamping device which comprises a working table and a stamping hammer arranged above the working table, a forming die table is arranged on the working table, the forming die table comprises a high table and a short table which are integrally formed, the short table is arranged on the front side of the high table, an arc-shaped inner concave part with an opening in the upper end is formed in the upper end face of the short table, and the upper end of the arc-shaped inner concave part is provided with an opening in the lower end. The arc-shaped concave part extends in the length direction of the short platform and penetrates through the two sides of the short platform, and the rear side of the arc-shaped concave part is in smooth transition with the front side of the high platform; the device further comprises a feeding mechanism and a material returning mechanism. According to the device, the punching hammer is matched with the forming die table to punch a metal plate into a hinge piece, in addition, the feeding mechanism can quickly and accurately feed the metal plate into the forming die table, and the material returning mechanism can quickly and effectively remove a finished product from the die table. Compared with traditional manual operation, the device greatly shortens the production cycle and improves the overall production capacity.

Description

Technical Field

[0001] The utility model relates to the field of metal plate stamping and forming, in particular to a metal plate stamping device. Background Art

[0002] In modern manufacturing, metal hinges, as an important connector, are widely used in doors, windows, furniture and other fields. The traditional hinge production process mainly uses stamping technology, which has gradually matured after years of development. However, traditional manual loading and unloading and auxiliary limiting operations have seriously restricted the improvement of production efficiency. In actual production, the operator needs to manually place the prefabricated T-shaped plate on the die of the stamping machine, and use a handheld abutment plate to abut and limit it to ensure the precise coordination between the hammer and the die to form the metal plate. This process is not only time-consuming and labor-intensive, but also prone to unstable quality of the finished product due to deviations in manual operation, which in turn affects the production efficiency and overall benefits of the company. Utility Model Content

[0003] In order to overcome the shortcomings of poor quality and low efficiency in the stamping process of metal hinge plates in the above background, the utility model provides a metal plate stamping device.

[0004] Technical solution: A metal sheet stamping device includes a workbench and a hammer arranged above the workbench, a forming die table is arranged on the workbench, and the forming die table includes an integrally formed high table and a low table, the low table is arranged on the front side of the high table, and the upper end surface of the low table is formed with an arc-shaped concave with an open upper end, the arc-shaped concave extends along the length direction of the low table and passes through both sides thereof, and the rear side of the arc-shaped concave smoothly transitions with the front side of the high table; it also includes a loading mechanism and a returning mechanism, wherein the loading mechanism is used to move the metal plate onto the forming die table, and the returning mechanism is driven by the hammer to remove the metal plate from the forming die table.

[0005] In addition, it is particularly preferred that the loading mechanism includes a material rack arranged at the upper end of the workbench, the material rack is provided with a first pushing unit for driving the metal plate to move to the rear end, the rear end of the material rack is provided with an opening that only allows one metal plate to pass horizontally, and one side of the opening is provided with a second pushing unit for feeding the metal plate at the rear end of the material rack into the forming mold table.

[0006] In addition, it is particularly preferred that the open end of the material rack is provided with a transversely extending front stop and a rear stop, the front stop and the rear stop forming a feeding channel, the two ends of the channel are respectively connected to the opening and the forming die table, wherein the front stop is fixedly connected to the material rack, and the highest point of the front stop is lower than the highest point of the forming die table;

[0007] The rear stop portion includes a vertical sliding rod, a return spring sleeved on the vertical sliding rod, and a stop bar provided on the top of the pin rod. The front end of the upper end surface of the platform is recessed downward to form a step platform, and the upper end surface of the step platform is provided with a vertical sliding groove adapted to the pin rod.

[0008] In addition, it is particularly preferred that the first pushing unit includes a push plate and two tension springs, the push plate is arranged in the middle of the material rack and is slidably connected thereto, the two tension springs are respectively arranged on both sides of the material rack, one end of the tension spring is fixed to the rear end of the material rack, and the other end is respectively connected to the ear plates on both sides of the push plate, and the push plate is driven to move from the front end to the rear end of the material rack by the action of the tension spring.

[0009] In addition, it is particularly preferred that the first pushing unit includes a push plate and an electric push rod, the electric push rod is arranged at the front end of the material rack and is consistent with the material conveying direction, the push plate is arranged at the end of the piston rod of the electric push rod, and the push plate is placed in the middle of the material rack.

[0010] In addition, it is particularly preferred that the movement direction of the second pushing unit is perpendicular to the movement direction of the first pushing unit, the second pushing unit includes a cylinder arranged on the material rack, and a feeding plate arranged at the end of the cylinder piston rod, the feeding plate includes a hook plate parallel to the axis direction of the cylinder, the first end of the hook plate is connected to the cylinder piston rod, and the second end opposite to the first end is bent 90 degrees to form a hook head, the cylinder drives the feeding plate to move, and drives the metal plate to move to the forming mold table through the hook head.

[0011] In addition, it is particularly preferred that the feeding plate further includes a baffle, one end of the baffle is fixed to the front end of the hook head, and the other end of the baffle extends in a direction away from the hook plate.

[0012] In addition, it is particularly preferred that a first roller frame and a second roller frame are provided at the bottom of the material rack, the first roller frame is arranged longitudinally, the second roller frame is arranged transversely, the second roller frame is arranged at the rear end of the first roller frame, and one end of the second roller frame is close to the forming mold table.

[0013] In addition, it is particularly preferred that the material returning mechanism includes a material shifting portion and a driving portion;

[0014] The material-prying part includes a slider, an inclined block, a guide rod and a pin rod. The forming die table is provided with a horizontal slide groove allowing the slider to move laterally, and a horizontal hole allowing the guide rod to slide horizontally. The horizontal hole is connected to the horizontal slide groove. One end of the guide rod is connected to the slider. A long spring is sleeved on the guide rod. One end of the long spring abuts on the slider, and the other end abuts on the inner wall of the horizontal slide groove. The inclined block and the pin rod are respectively arranged at both ends of the slider, wherein the inclined block is close to the arc-shaped concave side of the forming die table. A longitudinal groove for accommodating the inclined block is provided on the slider, and a short spring is provided in the groove. One end of the short spring acts on the inclined block to make the inclined block extend partially along the longitudinal groove.

[0015] The driving part includes a guide block, the upper end of which is connected to the hammer, one side of the guide block is provided with a right-angled triangle-shaped annular track groove that allows the pin rod to move, and the other side is provided with a limit piece; the annular track groove includes a vertical groove, a horizontal groove and an oblique groove, and a guide piece is provided at the connection between the vertical groove and the oblique groove, one end of the guide piece is provided with a pin shaft, the pin shaft passes through the guide block and is connected to a swing piece at the other end; one side of the limit piece is provided with a fan-shaped groove, the swing piece is located in the fan-shaped groove, and a bending spring is provided in the fan-shaped groove, one end of the bending spring abuts on the swing piece, and the other end abuts on the side wall of the fan-shaped groove.

[0016] This device uses a punch and a forming die to stamp metal sheets into hinge components. Furthermore, a loading mechanism quickly and accurately feeds the metal sheets into the forming die, while a removal mechanism quickly and efficiently removes the finished product from the die. Compared to traditional manual operations, this device significantly shortens production cycles and improves overall production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the feeding mechanism of the present utility model.

[0019] Figure 3 It is a three-dimensional structural diagram of the forming die table and the material return mechanism of the utility model.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the material shifting part of the utility model.

[0021] Figure 5 This is a partial schematic diagram of the material-prying part of the present invention, wherein the slider part is a longitudinal sectional view.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the driving part of the utility model.

[0023] Figure 7 It is a partial structural diagram of the driving part of the utility model.

[0024] Figure 8 This is a schematic diagram of the metal sheet loading and unloading process and the formed parts of the utility model.

[0025] Among them, the above drawings include the following figure marks: 1. workbench, 2. hammer, 3. forming die table, 31. high platform, 32. low platform, 33. arc-shaped concave, 34. horizontal slide, 35. horizontal hole, 4. feeding mechanism, 41. material rack, 411. opening, 412. front stop, 413. rear stop, 4131. vertical slide bar, 4132. return spring, 4133. stop bar, 42. first pushing unit, 421. push plate, 422. tension spring, 43. second pushing unit, 431. cylinder, 432. feeding plate, 4321. hook plate, 432 2. Hook, 4323. Baffle, 5. Material return mechanism, 51. Material shifting part, 511. Slider, 5111. Longitudinal groove, 5112. Short spring, 512. Oblique block, 513. Guide rod, 514. Pin, 515. Long spring, 52. Driving part, 521. Guide block, 522. Limiting part, 5221. Fan-shaped groove, 5222. Bending spring, 523. Vertical groove, 524. Horizontal groove, 525. Oblique groove, 526. Guide plate, 527. Swinging plate, 6. First roller frame, 61. Second roller frame, a1. Metal plate, a2. Formed part. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0027] like Figure 1 The metal sheet stamping device shown includes a workbench 1, a hammer 2 and a forming die 3, wherein the hammer 2 is arranged above the workbench 1, and the forming die 3 is arranged on the upper end surface of the workbench 1. The metal hinge plate is placed on the forming die 3, and the hammer 2 is started to punch the metal hinge plate downward, and cooperate with the forming die 3 to form a formed part a2.

[0028] like Figure 3 As shown, the forming die 3 includes an integrally formed high platform 31 and a low platform 32. The low platform 32 is arranged on the front side of the high platform 31. The upper end surface of the low platform 32 is formed with an arc-shaped recess 33 with an open upper end. The arc-shaped recess 33 extends along the length direction of the low platform 32 and passes through both sides thereof. The rear side of the arc-shaped recess 33 smoothly transitions to the front side of the high platform 31; the metal plate a1 is T-shaped. When stamping, the lower side of the metal plate a1 is bent into a shaft cylinder shape along the inner wall of the arc-shaped recess 33.

[0029] The device also includes a loading mechanism 4 and a material removal mechanism 5 , wherein the loading mechanism 4 is used to move the metal plate a1 onto the forming die table 3 , and the material removal mechanism 5 is driven by the hammer 2 to remove the metal plate a1 from the forming die table 3 .

[0030] Specifically, such as Figure 2 As shown, the loading mechanism 4 includes a material rack 41 arranged at the upper end of the workbench 1, and the material rack 41 is used to continuously provide the metal plate a1 to the forming die table 3. In this embodiment, the material rack 41 is a rectangular box body with an open upper part and a hollowed-out part. The metal plate a1 is fed along the length direction of the material rack 41, and the material rack 41 is provided with a first pushing unit 42 specifically for driving the metal plate a1 to move from front to back. When the metal plate a1 is moved to the rear end of the material rack 41, the metal plate a1 is horizontally moved to the forming die table 3 by another driving unit: a second pushing unit 43 arranged on the material rack 41. It should be noted that the rear end of the material rack 41 is provided with an opening 411 that only allows one metal plate a1 to pass horizontally, and the opening 411 faces the forming die table 3. By setting up the loading mechanism, the metal plate a1 can be automatically and continuously moved to the forming die table 3, thereby improving the degree of automation of the device and the processing efficiency.

[0031] refer to Figure 2 and Figure 3 In addition, a front stopper 412 and a rear stopper 413 extending laterally are provided at the end of the opening 411 of the material rack 41. The front stopper 412 and the rear stopper 413 form a feeding channel. The two ends of the channel are respectively connected to the opening 411 and the forming die table 3 to ensure that the metal plate a1 is fed smoothly and can maintain the best stamping position. The front stopper 412 is fixedly connected to the material rack 41. It should be noted that the highest point of the front stopper 412 is lower than the highest point of the forming die table 3; the rear stopper 413 includes a vertical slide bar 4131, a return spring 4132 and a stop bar 4133. The rear stopper 413 is set on the high platform of the forming die table 3. 31 upper end, specifically, the front end of the upper end surface of the high platform (31) of the forming die table 3 is recessed downward to form a step platform, and the upper end surface of the step platform is provided with a vertical groove 523 adapted to the pin rod 514, the stop bar 4133 is arranged on the top of the pin rod 514, and the return spring 4132 is sleeved on the vertical slide rod 4131, and the upper end of the return spring 4132 abuts against the bottom of the stop bar 4133, and the lower end of the return spring 4132 abuts against the upper end surface of the step platform, the front stop portion 412 and the rear stop portion 413 limit the metal plate a1 on the front and rear sides, and are arranged in a high and low form, so that the feeding position is constrained to the best, providing protection for subsequent stamping.

[0032] refer to Figure 2 In a preferred embodiment, the first pushing unit 42 includes a push plate 421 and two tension springs 422, wherein the push plate 421 is arranged in the middle of the material rack 41 and is slidably connected thereto, and the two tension springs 422 are respectively arranged on both sides of the material rack 41, wherein one end of the tension spring 422 is fixedly connected to the rear end of the material rack 41, and the other end of the tension spring 422 is respectively connected to the ear plates on both sides of the push plate 421, and the push plate 421 is driven to move from the front end to the rear end of the material rack 41 by the action of the tension spring 422.

[0033] In another preferred embodiment, the first pushing unit 42 is composed of a push plate 421 and an electric push rod, wherein the electric push rod is arranged at the front end of the material rack 41 and is consistent with the material conveying direction. The difference from the above embodiment is that the electric push rod is used instead of the tension spring 422 in this embodiment, and the push plate 421 is arranged at the end of the piston rod of the electric push rod, and the push plate 421 is placed in the middle of the material rack 41. Of course, the electric push rod and the tension spring 422 can also be replaced by a cylinder, a linear motor, a lead screw, etc. It is particularly important to note that when using the electric push rod, the cylinder, and the lead screw, they need to be used in conjunction with the PLC control system. By accurately calculating the thickness of the metal plate a1, the feeding stroke of each time is controlled.

[0034] Specific reference Figure 2 The movement direction of the second pushing unit 43 of the device is perpendicular to the movement direction of the first pushing unit 42. The second pushing unit 43 includes a cylinder 431 installed on the material rack 41, and a feed plate 432 installed at the end of the piston rod of the cylinder 431. The cylinder 431 extends and retracts, driving the feed plate 432 to move horizontally, each time conveying one metal sheet a1 toward the forming die table 3. Specifically, the feed plate 432 includes a hook plate 4321 parallel to the axis of the cylinder 431. The hook plate 4321 includes a first end and a second end. The first end of the hook plate 4321 is connected to the piston rod of the cylinder 431, and the second end opposite the first end is bent at 90 degrees to form a hook head 4322. The cylinder 431 drives the feed plate 432 to move, and the hook head 4322 drives the metal sheet a1 to move to the forming die table 3. In addition, the feed plate 432 also includes a baffle 4323. One end of the baffle 4323 is fixed to the front end of the hook head 4322, and the other end of the baffle 4323 extends away from the hook plate 4321. The baffle 4323 is added to prevent the metal plate a1 on the material rack 41 from moving toward the rear end of the material rack 41 when the hook plate 4321 is feeding the metal plate a1 forward, thereby preventing interference when the hook plate 4321 returns.

[0035] refer to Figure 2 On the basis of the above, the material rack 41 also includes a first roller rack 6 and a second roller rack 61, wherein the first roller rack 6 and the second roller rack 61 are arranged at the bottom of the material rack 41. Specifically, the first roller rack 6 is arranged longitudinally, and the second roller rack 61 is arranged horizontally. The second roller rack 61 is arranged at the rear end of the first roller rack 6, and one end of the second roller rack 61 is close to the forming mold table 3. By arranging the first roller rack 6 and the second roller rack 61, the loading process can be ensured to be smooth and friction and jamming can be reduced.

[0036] refer to Figure 3 The device also includes a material return mechanism 5, which includes a material picking portion 51 and a driving portion 52. Setting the material return mechanism 5 can improve the automation performance of the device and speed up production efficiency. Figure 4 、 Figure 5The cam 513 is provided with a plurality of springs 516, 517 and 518, and the cam 514 is provided with a plurality of springs 517, 518 and 519, and the cam 515 is provided with a plurality of springs 518, 519 and 520, and the cam 516 is provided with a plurality of springs 516, 517 and 520, and the cam 514 ... The cam 512 is pressed against the bottom edge of the workpiece 5111, and the cam 512 is pressed against the top edge of the workpiece 5112, so that the workpiece 511 is pushed away from the workpiece 511. Figure 8 .

[0037] like Figure 6 、 7 As shown, the driving part 52 specifically includes a guide block 521, wherein the upper end of the guide block 521 is fixedly connected to the hammer 2, and a right-angled triangle-shaped annular track groove is provided on one side of the guide block 521 to allow the pin rod 514 to move, and a limit piece 522 is provided on the side of the guide block 521 opposite to the annular track groove; its annular track groove specifically includes a vertical groove 523, a horizontal groove 524 and an oblique groove 525, and a guide piece 526 is provided at the connection between the vertical groove 523 and the oblique groove 525, and a pin is provided at one end of the guide piece 526, which passes through the guide block 521 and is connected to a swing piece 527 at the other end, and a fan-shaped groove 5221 is provided on one side of the limit piece 522, and the swing piece 527 is located in the fan-shaped groove 5221, and a bending spring 5222 is provided in the fan-shaped groove 5221, and one end of the bending spring 5222 abuts on the swing piece 527, and the other end abuts on the side wall of the fan-shaped groove 5221.

[0038] When the hammer 2 punches the metal plate a1 downward, the guide block 521 moves downward relative to the pin 514, and the pin 514 touches the guide piece 526, causing the guide piece 526 to deflect toward the movable side, and synchronously drives the swing piece 527 to deflect synchronously. The swing piece 527 squeezes the bending spring 5222 and accumulates force. When the pin 514 passes over the guide piece 526, the bending spring 5222 drives the swing piece 527 and the guide piece 526 to reset. The fan-shaped groove 5221 controls the rotation angle of the swing piece 527 and the guide piece 526. The degree of limitation is achieved. When the punching is completed and the hammer 2 moves upward, it drives the guide block 521 upward synchronously. At this time, the pin rod 514 moves downward relative to the guide block 521. Since the fan-shaped groove 5221 limits the guide piece 526 from deflecting in the other direction, the pin rod 514 cannot move relative to the vertical groove 523 and can only move relative to the inclined groove 525. Through the action of the inclined groove 525, the horizontal slide groove 34 is cooperated to make the pin rod 514 move horizontally, and synchronously drive the entire material-pickup part 51 to move horizontally, completing the material removal of the formed part a2.

[0039] This utility model improves the automation performance and can automatically load and unload materials without excessive human intervention. In addition, the overall stability is improved through the design, which not only improves the production efficiency of metal hinge plates, but also further improves the quality of workpieces. The application of this device has good market prospects and economic benefits.

[0040] The above embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications, improvements, and substitutions without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A metal sheet stamping device, characterized in that: The invention comprises a workbench (1) and a punch (2) arranged above the workbench (1); a forming die table (3) is arranged on the workbench (1); the forming die table (3) comprises an integrally formed high table (31) and a low table (32); the low table (32) is arranged on the front side of the high table (31); an upper end surface of the low table (32) is formed with an arc-shaped concave (33) with an open upper end; the arc-shaped concave (33) extends along the length direction of the low table (32) and passes through both sides thereof; the rear side of the arc-shaped concave (33) smoothly transitions to the front side of the high table (31); It also includes a loading mechanism (4) and a material removal mechanism (5), wherein the loading mechanism (4) is used to move the metal plate (a1) onto the forming die table (3), and the material removal mechanism (5) is driven by a punch (2) to remove the metal plate (a1) from the forming die table (3).

2. The metal sheet punching device according to claim 1, characterized in that: The loading mechanism (4) comprises a material rack (41) arranged at the upper end of the workbench (1); the material rack (41) is provided with a first pushing unit (42) for driving the metal plate (a1) to move toward the rear end; the rear end of the material rack (41) is provided with an opening (411) for allowing only one metal plate (a1) to pass horizontally; and one side of the opening (411) is provided with a second pushing unit (43) for feeding the metal plate (a1) at the rear end of the material rack (41) into the forming die table (3).

3. The metal sheet punching device according to claim 2, characterized in that: The opening (411) end of the material rack (41) is provided with a transversely extending front stopper (412) and a rear stopper (413), the front stopper (412) and the rear stopper (413) forming a feeding channel, the two ends of the channel being respectively connected to the opening (411) and the forming die table (3), wherein the front stopper (412) is fixedly connected to the material rack (41), and the highest point of the front stopper (412) is lower than the highest point of the forming die table (3); The rear stopper (413) includes a vertical slide rod (4131), a return spring (4132) sleeved on the vertical slide rod (4131), and a stop bar (4133) provided on the top of the pin rod (514). The front end of the upper end surface of the platform (31) is recessed downward to form a step platform, and the upper end surface of the step platform is provided with a vertical slide groove adapted to the pin rod (514).

4. The metal sheet punching device according to claim 2, characterized in that: The first pushing unit (42) includes a pushing plate (421) and two tension springs (422), wherein the pushing plate (421) is arranged in the middle of the material rack (41) and is slidably connected thereto, and the two tension springs (422) are respectively arranged on both sides of the material rack (41), wherein one end of the tension spring (422) is fixedly connected to the rear end of the material rack (41), and the other end is respectively connected to the ear plates on both sides of the pushing plate (421), and the pushing plate (421) is driven to move from the front end to the rear end of the material rack (41) by the action of the tension spring (422).

5. The metal sheet punching device according to claim 2, characterized in that: The first pushing unit (42) includes a push plate (421) and an electric push rod, wherein the electric push rod is arranged at the front end of the material rack (41) and is consistent with the material conveying direction, and the push plate (421) is arranged at the end of the piston rod of the electric push rod, and the push plate (421) is placed in the middle of the material rack (41).

6. The metal sheet punching device according to claim 2, characterized in that: The movement direction of the second pushing unit (43) is perpendicular to the movement direction of the first pushing unit (42). The second pushing unit (43) includes a cylinder (431) arranged on the material rack (41), and a feeding plate (432) arranged at the end of the piston rod of the cylinder (431). The feeding plate (432) includes a hook plate (4321) parallel to the axis direction of the cylinder (431). The first end of the hook plate (4321) is connected to the piston rod of the cylinder (431), and the second end opposite to the first end is bent at 90 degrees to form a hook head (4322). The cylinder (431) drives the feeding plate (432) to move, and drives the metal plate (a1) to move to the forming mold table (3) through the hook head (4322).

7. The metal sheet punching device according to claim 6, characterized in that: The feeding plate (432) further comprises a baffle (4323), one end of which is fixed to the front end of the hook head (4322), and the other end of which extends in a direction away from the hook plate (4321).

8. The metal sheet punching device according to claim 2, characterized in that: A first roller frame (6) and a second roller frame (61) are provided at the bottom of the material frame (41), wherein the first roller frame (6) is provided longitudinally, and the second roller frame (61) is provided transversely, and the second roller frame (61) is provided at the rear end of the first roller frame (6), and one end of the second roller frame (61) is close to the forming die table (3).

9. The metal sheet punching device according to any one of claims 1 to 8, characterized in that: The material-returning mechanism (5) comprises a material-moving portion (51) and a driving portion (52); The material-selecting portion (51) includes a slider (511), an inclined block (512), a guide rod (513) and a pin rod (514). The forming die table (3) is provided with a horizontal slide groove (34) for allowing the slider (511) to move laterally, and a horizontal hole (35) for allowing the guide rod (513) to slide horizontally. The horizontal hole (35) is connected to the horizontal slide groove (34). One end of the guide rod (513) is connected to the slider (511). A long spring (515) is sleeved on the guide rod (513). One end of the long spring (515) abuts against the slider. On the slider (511), the other end abuts against the inner wall of the horizontal slide groove (34), and the inclined block (512) and the pin rod (514) are respectively provided at both ends of the slider (511), wherein the inclined block (512) is close to the side of the arc-shaped concave (33) of the forming die table (3), and the slider (511) is provided with a longitudinal groove (5111) for accommodating the inclined block (512), and a short spring (5112) is provided in the groove, and one end of the short spring (5112) acts on the inclined block (512) to make the inclined block (512) partially extend along the longitudinal groove (5111); The driving part (52) includes a guide block (521), the upper end of which is connected to the hammer (2), one side of the guide block (521) is provided with a right-angled triangle-shaped annular track groove allowing the pin rod (514) to move, and the other side is provided with a limit piece (522); The annular track groove includes a vertical groove (523), a horizontal groove (524) and an oblique groove (525). A guide piece (526) is provided at the connection between the vertical groove (523) and the oblique groove (525). A pin is provided at one end of the guide piece (526). The pin passes through the guide block (521) and is connected to a swing piece (527) at the other end. A fan-shaped groove (5221) is provided on one side of the limiting member (522), the swinging piece (527) is located in the fan-shaped groove (5221), a bending spring (5222) is provided in the fan-shaped groove (5221), one end of the bending spring (5222) abuts against the swinging piece (527), and the other end abuts against the side wall of the fan-shaped groove (5221).

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