CN211679645U - Stamping die - Google Patents

Abstract

The utility model provides a stamping die belongs to punching press technical field, including upper die base, die holder, go up mould slider, lower mould drive block and lower mould slider. The upper die sliding block is transversely arranged on the upper die base in a sliding manner, and the lower end of the upper die sliding block is provided with an upper die ejector block; the lower die driving block is longitudinally arranged on the lower die base in a sliding manner, the upper end of the lower die driving block is provided with a lower die ejecting block, and the lower part of the lower die driving block is obliquely provided with a first guide sliding surface; the lower die sliding block is transversely arranged on the lower die base in a sliding manner, the upper part of the lower die sliding block is obliquely provided with a second guide sliding surface, and one side of the lower die sliding block is provided with an operation insert; the upper die ejector block slides through the upper die sliding block, and the relative position of the upper die ejector block and the lower die ejector block is adjusted to switch the lower die sliding block to be in a working state or a non-working state. The utility model provides a stamping die, with a set of mould can produce multiple product, improved production efficiency by a wide margin. The workpiece taking space of a workpiece is increased, and the phenomenon that the machine tool is in unbalance loading due to the fact that the upper die is heavier is avoided.

Description

Stamping die

Technical Field

The utility model belongs to the technical field of the punching press, more specifically say, relate to a stamping die.

Background

With the diversified development of automobiles, the automobile model is changing day by day, and the market competition is fierce day by day. In the new product development process, the proportion of the development cost of the mold is relatively large, and how to save the development cost of the mold to the maximum extent becomes an important subject for the research of all host factories and mold suppliers.

The stamping die for the automobile body covering parts is the die with the highest requirement and the highest processing difficulty in automobile body manufacturing, and is cold stamping process equipment which is rapidly developed in the manufacturing of electromechanical stamping parts in China. In automobile panel stamping die, when different states stamping parts are processed by switching the state of the lower wedge on the same set of die, the common traditional lower wedge mechanism can only be realized by disassembling the wedge component under the production line. The mode of disassembling the wedge component off line is unreasonable, the disassembled component needs to be installed again when another state stamping part is produced next time, the die changing time is long, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stamping die aims at solving when processing different state stamping workpiece, need dismantle the mould repeatedly, and retooling time is longer, has reduced production efficiency.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a stamping die, includes upper die base and die holder, still includes:

the upper die sliding block is transversely arranged on the upper die base in a sliding manner, and an upper die ejector block is arranged at the lower end of the upper die sliding block;

the lower die driving block is longitudinally arranged on the lower die base in a sliding mode, a lower die jacking block is arranged at the upper end of the lower die driving block, and a first guide sliding surface is obliquely arranged at the lower part of the lower die driving block;

the lower die sliding block is arranged on the lower die base in a transverse sliding mode, a second guide sliding surface in sliding fit with the first guide sliding surface is obliquely arranged at the upper part of the lower die sliding block, and an operation insert is arranged on one side of the lower die sliding block;

the upper die ejector block slides through the upper die sliding block, the relative position of the upper die ejector block and the lower die ejector block is adjusted, and the lower die sliding block is switched to be in a working state or a non-working state.

Furthermore, an upper guide sliding assembly and a driving mechanism are arranged on the lower end face of the upper die base, the upper die sliding block is arranged in the upper guide sliding assembly and is driven by the driving mechanism to slide along the upper guide sliding assembly.

Furthermore, the upper guide sliding assembly comprises a plurality of upper guide sliding plates and a plurality of upper guide sliding cover plates, the plurality of upper guide sliding plates are arranged on the lower end surface of the upper die base, the plurality of upper guide sliding cover plates are arranged on two sides of the upper guide sliding plates, and the upper parts of the upper guide sliding cover plates are bent towards one sides of the upper guide sliding plates to form sliding groove structures which are in sliding fit with two sides of the upper die sliding block.

Furthermore, limit stops are arranged on two sides of the upper guide sliding assembly and used for adjusting the relative position of the upper die ejector block and the lower die ejector block by limiting the sliding position of the upper die slider.

Furthermore, the lower die driving block is provided with a plurality of driving block guiding and sliding surfaces which are longitudinally installed, and the lower die driving block is arranged on the lower die base in a sliding mode through the plurality of driving block guiding and sliding surfaces.

Furthermore, a first return cylinder is arranged on the lower die base, a driving block ejecting block is arranged on the lower portion of the lower die driving block, and the first return cylinder abuts against the driving block ejecting block and is used for driving the lower die driving block to return.

Furthermore, a buffer piece used for buffering the longitudinal movement of the lower die driving block to generate impact force is arranged on the lower die base.

Furthermore, a lower guide sliding assembly is arranged on the lower die base, and the lower die sliding block is arranged on the lower die base in a transverse sliding mode through the lower guide sliding assembly.

Further, lead smooth subassembly down and include protruding V type baffle and two and lead smooth apron down, protruding V type baffle is located two lead between the smooth apron down, lead smooth apron down with the die holder up end constitutes be used for with the both sides sliding fit's of lower mould slider spout structure, the lower extreme of lower mould slider be equipped with be used for with protruding V type baffle sliding fit's concave V type baffle.

Furthermore, a second return cylinder is arranged on the lower die base, a sliding block ejecting block is arranged on one side, away from the operation insert, of the lower die sliding block, and the second return cylinder abuts against the sliding block ejecting block and is used for driving the lower die sliding block to return.

The utility model provides a stamping die's beneficial effect lies in: compared with the prior art, the utility model discloses stamping die goes up mould slider slidable mounting on the upper die base, and lower mould drive block and lower mould slider slidable mounting are on the die holder, and lower mould drive block and lower mould slider lead spigot surface sliding fit through the first spigot surface and the second of slope setting, constitute the slide wedge structure, and the operation is inserted and is installed on the lower mould slider. The upper die sliding block is arranged on the upper die base in a transverse sliding mode, when the upper die sliding block slides to the position where the upper die ejector block and the lower die ejector block are oppositely arranged, the upper die base moves downwards, the lower die ejector block is ejected downwards through the upper die ejector block, the lower die driving block slides downwards along the lower die base, the lower die sliding block is driven to slide transversely through the sliding fit relation of the first sliding guide surface and the second sliding guide surface, and the lower die sliding block finishes operation through the operation insert on one side; when the upper die sliding block slides to the upper die ejector block and the lower die ejector block are arranged in a staggered mode, the upper die base moves downwards, the upper die ejector block cannot eject the lower die ejector block downwards, the lower die driving block cannot slide, the lower die sliding block does not slide, and the lower die sliding block is in a non-working state. The upper die sliding block can be slid to complete the switching between the working state and the non-working state, the dies do not need to be disassembled repeatedly, the same set of dies can be used for producing various products, and the production efficiency is greatly improved. In addition, because the slide wedge structure all installs on the die holder, at the certain degree the get a space of increase finished piece, avoid going up the mould overweight partially simultaneously, and lead to appearing the lathe unbalance loading accident.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a stamping die provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of an upper die base and an upper die slider provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of the lower die base, the lower die driving block and the lower die sliding block provided by the embodiment of the present invention;

fig. 4 is a schematic structural view of an upper die slide block and a lower die driving block provided in the embodiment of the present invention;

fig. 5 is a schematic structural view of an upper die slide block provided in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a lower die driving block provided in an embodiment of the present invention;

fig. 7 is a schematic structural view of the lower die holder provided in the embodiment of the present invention.

In the figure: 100. an upper die holder; 101. an upper guide sliding plate; 102. an upper sliding guide cover plate; 103. a drive mechanism; 104. a connecting plate; 105. a limit stop block; 200. a lower die holder; 201. a first return cylinder; 202. a buffer member; 203. a convex V-shaped guide plate; 204. a lower sliding guide cover plate; 205. a second return cylinder; 206. a safety screw; 300. an upper die slide block; 301. an upper die ejector block; 400. a lower die driving block; 401. a lower die ejector block; 402. a first leading slide surface; 403. a driving block sliding guide surface; 404. a forced return trip hook is hooked; 500. a lower die slide block; 501. a second leading slide surface; 502. operating the insert; 503. a concave V-shaped guide plate; 504. the nitrogen cylinder is laterally pressurized.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 7, a stamping die according to the present invention will now be described. The stamping die comprises an upper die holder 100, a lower die holder 200, an upper die slide block 300, a lower die driving block 400 and a lower die slide block 500.

The upper die slide block 300 is transversely arranged on the upper die base 100 in a sliding manner, and the lower end of the upper die slide block 300 is provided with an upper die ejector block 301; the lower die driving block 400 is longitudinally arranged on the lower die base 200 in a sliding manner, the upper end of the lower die driving block 400 is provided with a lower die top block 401, and the lower part of the lower die driving block 400 is obliquely provided with a first guide sliding surface 402; the lower die sliding block 500 is transversely arranged on the lower die base 200 in a sliding manner, the upper part of the lower die sliding block 500 is obliquely provided with a second guide sliding surface 501 in sliding fit with the first guide sliding surface 402, and one side of the lower die sliding block 500 is provided with an operation insert 502; the upper die ejector block 301 slides through the upper die slider 300, and the relative position of the upper die ejector block 301 and the lower die ejector block 401 is adjusted to switch the lower die slider 500 to be in a working or non-working state.

The utility model provides a stamping die compares with prior art, goes up mould slider 300 slidable mounting on upper die base 100, and lower mould drive block 400 and lower mould slider 500 slidable mounting are on die holder 200, and lower mould drive block 400 and lower mould slider 500 lead spigot surface 501 sliding fit through the first spigot surface 402 and the second that the slope set up, constitute the slide wedge structure, and the operation is inserted 502 and is installed on lower mould slider 500. The upper die sliding block 300 is transversely arranged on the upper die base 100 in a sliding manner, when the upper die sliding block 300 slides to the upper die top block 301 and the lower die top block 401 which are oppositely arranged, the upper die base 100 moves downwards, the upper die top block 301 downwards pushes the lower die top block 401, the lower die driving block 400 downwards slides along the lower die base 200, the lower die sliding block 500 is driven to transversely slide through the sliding fit relationship of the first sliding guide surface 402 and the second sliding guide surface 501, and the lower die sliding block 500 finishes operation through the operation insert 502 on one side; when the upper mold slider 300 slides to the upper mold top block 301 and the lower mold top block 401 in a staggered arrangement, the upper mold base 100 moves downward, the upper mold top block 301 cannot press the lower mold top block 401 downward any more, the lower mold driving block 400 cannot slide, and the lower mold slider 500 does not slide and is in a non-working state. The upper die slide block 300 can be slid to complete the switching between the working state and the non-working state, the dies do not need to be disassembled repeatedly, multiple products can be produced by the same set of dies, and the production efficiency is greatly improved. In addition, because the wedge structures are all installed on the lower die base 200, the workpiece taking space of a workpiece is increased to a certain degree, and the phenomenon that the upper die is heavier to cause the eccentric load accident of the machine tool is avoided.

The operation insert 502 is not limited to a trimming insert, a flanging insert, a shaping insert, a trimming and punching combination, and the like, and the stamping die can realize multiple functions and product processing, including function conversion of partial or complete existence of side trimming, function conversion of partial or complete existence of side flanging, function conversion of partial or complete existence of side shaping, and combination of partial or complete existence of side trimming and side punching, side flanging and side punching, side shaping and side punching. By sliding the upper die slide block 300, the relative positions of the upper die top block 301 and the lower die top block 401 are changed, and the functions of partial or all specific positions, such as no trimming, no flanging or no shaping, can be realized.

The first guide sliding surface 402 and the second guide sliding surface 501 are both provided with guide plates, the first guide sliding surface 402 and the second guide sliding surface 501 slide relatively through the guide plates, and the guide plates have higher smoothness than the first guide sliding surface 402 and the second guide sliding surface 501, so that the first guide sliding surface 402 and the second guide sliding surface 501 can slide more smoothly. In addition, a forced return hook 404 is further installed on the first guiding and sliding surface 402, so as to facilitate the return of the lower mold sliding block 500. The safety screw 206 is installed in the lower die holder 200, and the safety screw 206 can ensure that the lower die driving block 400 slides smoothly and avoid slipping from the lower die holder 200. A plurality of side material-pressing nitrogen cylinders 504 are circumferentially arranged at the working end of the working insert 502 of the lower die driving block 400, and when the working insert 502 works, the plurality of side material-pressing nitrogen cylinders 504 compress the plate materials before the working insert 502, so that the trimming, flanging or shaping accuracy is ensured.

As a specific embodiment of the stamping die, please refer to fig. 2 and fig. 3, the lower end surface of the upper die base 100 is provided with an upper guide sliding component and a driving mechanism 103, the upper die sliding block 300 is arranged in the upper guide sliding component, and the upper die sliding block 300 is driven by the driving mechanism 103 to slide along the upper guide sliding component. In this embodiment, the driving mechanism 103 is a cylinder, and is horizontally installed on the lower end surface of the upper die holder 100 through a cylinder portion, a steering valve is installed on the outer side of the upper die holder 100, the steering valve is used for controlling the operation of the cylinder, and a piston portion of the cylinder is connected to the end portion of the upper die slider 300 through a connecting plate 104. The upper die ejector blocks 301 are arranged on the lower end face of the upper die sliding block 300 at intervals, and the air cylinder drives the upper die sliding block 300 to transversely slide along the upper guide sliding assembly, so that the relative positions of the upper die ejector blocks 301 and the lower die ejector blocks 401 are changed.

As a specific implementation manner of the stamping die, please refer to fig. 2 and fig. 3, the upper guide sliding assembly includes a plurality of upper guide sliding plates 101 and a plurality of upper guide sliding cover plates 102, the plurality of upper guide sliding plates 101 are disposed on the lower end surface of the upper die base 100, the plurality of upper guide sliding cover plates 102 are disposed on the two sides of the upper guide sliding plates 101, one side of the upper guide sliding plate 101 on the upper guide sliding cover plate 102 is bent, and the sliding groove structure is disposed on the two sides of the upper die sliding block 300 in a sliding fit manner. In this embodiment, a plurality of upper sliding guide plates 101 are fixed on the lower end surface of the upper die holder 100 by screws, the upper die holder 100 is turned over, the upper die slider 300 is then placed on the upper sliding guide plates 101, and finally, the upper sliding guide cover plates 102 are installed on both sides of the upper sliding guide plates 101, so that both sides of the upper die slider 300 are located in the sliding groove structure formed between the upper sliding guide cover plates 102 and the upper sliding guide plates 101. Since the upper portion of the upper slide cover plate is bent inward, the upper mold slide 300 can be ensured to slide between the upper guide slide plate 101 and the upper slide cover plate 102 without falling off.

As a specific embodiment of the stamping die, please refer to fig. 2, both sides of the upper guide sliding assembly are all provided with limit stops 105, and the sliding positions of the upper die sliding block 300 are limited by the two limit stops 105, so as to adjust the relative positions of the upper die ejecting block 301 and the lower die ejecting block 401. In this embodiment, the limit stoppers 105 are respectively located on two sides of the upper sliding guide plate 101 and the upper sliding guide cover plate 102, and the limit stoppers 105 on the two sides are used for limiting the sliding distance of the upper mold slider 300. When the cylinder is in the initial state, the limit stopper 105 on one side is the reference of the contraction and stop position of the upper die slide 300, and at this time, the lower die slide 500 is in the working state. The other side limit stopper 105 is the reference of the extension and stop position of the upper mold slide 300, and the lower mold slide 500 is in a non-working state at this time. The upper die sliding block 300 realizes the switching between the working state and the non-working state through the limit stops 105 on the two sides, so that one set of die can be suitable for the processing of various products.

As a specific implementation manner of the stamping die provided in the present invention, please refer to fig. 6, a plurality of driving block guiding sliding surfaces 403 installed vertically are disposed on the lower die driving block 400, and the lower die driving block 400 is disposed on the lower die base 200 by means of the plurality of driving block guiding sliding surfaces 403 in a vertical sliding manner. In this embodiment, the plurality of driving block sliding guide surfaces 403 are respectively installed in the circumferential direction of the lower die driving block 400 by countersunk screws, and are all arranged longitudinally. The sliding guide surfaces 403 of the plurality of driving blocks are in sliding fit with the lower die holder 200, so that the friction force between the lower die driving block 400 and the lower die holder 200 is reduced, and the lower die driving block 400 slides more smoothly.

As a specific implementation manner of the stamping die, please refer to fig. 4, fig. 5 and fig. 7, the lower die base 200 is provided with a first return cylinder 201, the lower portion of the lower die driving block 400 is provided with a driving block ejecting block, and the first return cylinder 201 is ejected against the driving block ejecting block to be used for driving the lower die driving block 400 to return. In this embodiment, the first return cylinders 201 are a plurality of nitrogen cylinders, and are longitudinally and fixedly disposed on the lower die base 200. The lower die driving block 400 is mounted with a plurality of driving block top blocks by screws at positions corresponding to the plurality of first stroke cylinders 201. After the lower mold driving block 400 is driven by the upper mold sliding block 300 to complete one-time sliding, the first return cylinders 201 act simultaneously, and the lower mold driving block 400 returns to the initial position by jacking the plurality of driving block jacking blocks. The driving block top block can avoid the first return cylinder 201 from directly jacking the lower die driving block 400, increase the stress area of the lower die driving block 400, effectively protect the lower die driving block 400 and prevent the lower die driving block from being damaged.

Referring to fig. 7, a buffer 202 for buffering the impact force generated by the longitudinal movement of the lower die driving block 400 is disposed on the lower die base 200 as a specific embodiment of the stamping die of the present invention. In this embodiment, the plurality of buffering members 202 are uniformly distributed on the lower die base 200. The buffer member 202 is made of polyurethane, when the lower mold driving block 400 slides to near the bottom, the lower mold driving block 400 starts to contact the buffer member 202, and the buffer member 202 deforms to buffer the impact force when the lower mold driving block 400 slides downward to the bottom.

As a specific implementation manner of the stamping die provided in the present invention, please refer to fig. 3 and fig. 7, a lower guiding sliding component is disposed on the lower die base 200, and the lower die sliding block 500 is disposed on the lower die base 200 by means of the lower guiding sliding component sliding laterally. In this embodiment, the lower sliding guide assembly is installed in the lower die base 200, and the lower die slider 500 slides on the lower sliding guide assembly in the transverse direction.

As a specific implementation manner of the stamping die, please refer to fig. 4 and fig. 7, the lower slide guiding assembly includes the protruding V-shaped guide plate 203 and two lower slide guiding cover plates 204, the protruding V-shaped guide plate 203 is located between the two lower slide guiding cover plates 204, the lower slide guiding cover plates 204 and the upper end surface of the lower die holder 200 form a sliding groove structure for sliding fit with the two sides of the lower die slider 500, and the lower end of the lower die slider 500 is provided with the concave V-shaped guide plate 503 for sliding fit with the protruding V-shaped guide plate 203. In this embodiment, the concave V-shaped guide plate 503 is fixed to the middle of the lower end surface of the lower mold slider 500 by screws, and the concave V-shaped guide plate 503 and the convex V-shaped guide plate 203 form a transverse slide that slides inward or outward along the lower mold base 200, thereby ensuring the stability of the sliding of the lower mold slider 500. An inwards concave step platform structure is formed in the lower die holder 200, the lower die sliding block 500 is positioned in the inwards concave step platform, and the two lower guide sliding cover plates 204 are positioned at two sides of the step platform structure and used for limiting the lower die sliding block 500 and preventing the lower die sliding block 500 from moving upwards and separating from the lower die sliding block 500. Similarly, the two lower sliding guide cover plates 204 can slide laterally in cooperation with the lower mold slider 500, so that the sliding stability of the lower mold slider 500 is improved.

As a specific implementation manner of the stamping die, please refer to fig. 7, the second return cylinder 205 is disposed on the lower die base 200, the slider top block is disposed on one side of the lower die slider 500 away from the operation insert 502, and the second return cylinder 205 is pushed against the slider top block to drive the lower die slider 500 to return. In this embodiment, the second return cylinder 205 is a nitrogen cylinder and is transversely installed in the lower die base 200. The lower die slide 500 is mounted with a slide top block by screws at a position corresponding to the second return cylinder 205. After the lower mold slide 500 is driven by the upper mold slide 300 to slide down once, the lower mold slide 500 returns to the initial position through the jacking slide top block under the action of the second return cylinder 205. The slider kicking block can avoid second return stroke cylinder 205 directly to roof pressure lower mould slider 500, and increase lower mould slider 500's lifting surface area effectively protects lower mould slider 500, prevents its damage.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Stamping die, including upper die base and die holder, its characterized in that still includes:

the upper die sliding block is transversely arranged on the upper die base in a sliding manner, and an upper die ejector block is arranged at the lower end of the upper die sliding block;

the lower die driving block is longitudinally arranged on the lower die base in a sliding mode, a lower die jacking block is arranged at the upper end of the lower die driving block, and a first guide sliding surface is obliquely arranged at the lower part of the lower die driving block;

the lower die sliding block is arranged on the lower die base in a transverse sliding mode, a second guide sliding surface in sliding fit with the first guide sliding surface is obliquely arranged at the upper part of the lower die sliding block, and an operation insert is arranged on one side of the lower die sliding block;

the upper die ejector block slides through the upper die sliding block, the relative position of the upper die ejector block and the lower die ejector block is adjusted, and the lower die sliding block is switched to be in a working state or a non-working state.

2. The stamping die of claim 1, wherein the lower end surface of the upper die base is provided with an upper guide sliding assembly and a driving mechanism, and the upper die sliding block is arranged in the upper guide sliding assembly and is driven by the driving mechanism to slide along the upper guide sliding assembly.

3. The stamping die of claim 2, wherein the upper sliding guide assembly comprises a plurality of upper sliding guide plates and a plurality of upper sliding guide cover plates, the plurality of upper sliding guide plates are arranged on the lower end surface of the upper die base, the plurality of upper sliding guide cover plates are arranged on two sides of the upper sliding guide plates, and the upper parts of the upper sliding guide cover plates are bent towards one sides of the upper sliding guide plates to form sliding groove structures for slidably matching with two sides of the upper die sliding block.

4. The press tool of claim 2, wherein both sides of the upper guide slide assembly are provided with limit stoppers for adjusting the relative positions of the upper and lower die ejector blocks by defining the sliding position of the upper die slide.

5. The stamping die of claim 1, wherein the lower die driving block is provided with a plurality of driving block sliding guide surfaces which are longitudinally arranged, and the lower die driving block is arranged on the lower die base in a sliding manner by virtue of the plurality of driving block sliding guide surfaces.

6. The stamping die of claim 1, wherein a first return cylinder is arranged on the lower die base, a driving block ejecting block is arranged at the lower part of the lower die driving block, and the first return cylinder abuts against the driving block ejecting block and is used for driving the lower die driving block to return.

7. The stamping die of claim 6, wherein the lower die base is provided with a buffer for buffering the impact force generated by the longitudinal movement of the lower die driving block.

8. The stamping die of claim 1, wherein the lower die base is provided with a lower guide sliding assembly, and the lower die sliding block is arranged on the lower die base in a transverse sliding manner by virtue of the lower guide sliding assembly.

9. The stamping die of claim 8, wherein the lower guide sliding assembly comprises a convex V-shaped guide plate and two lower guide sliding cover plates, the convex V-shaped guide plate is positioned between the two lower guide sliding cover plates, the lower guide sliding cover plates and the upper end surface of the lower die base form a sliding groove structure which is in sliding fit with two sides of the lower die sliding block, and the lower end of the lower die sliding block is provided with a concave V-shaped guide plate which is in sliding fit with the convex V-shaped guide plate.

10. The stamping die of claim 1, wherein a second return cylinder is disposed on the lower die base, a slider top block is disposed on a side of the lower die slider away from the operation insert, and the second return cylinder abuts against the slider top block to drive the lower die slider to return.

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