Die

Abstract

A die is used for improving the material utilization rate and reducing the production cost and comprises an upper die mechanism and a lower die mechanism, the lower die mechanism comprises a male die assembly and a female die assembly, the male die assembly comprises a supporting piece, two male die pieces and two elastic pieces, and the supporting piece is arranged on one side of the upper die mechanism in the first direction and provided with two guide grooves and two containing grooves; a containing groove is formed in the groove bottom of each guide groove, each male die piece is arranged in the corresponding guide groove in a sliding mode, and each elastic piece is arranged in the corresponding containing groove and connected to the corresponding male die piece. The female die assembly comprises two female die parts which are symmetrically arranged on the two sides of the supporting part in the third direction and correspond to the two male die parts in a one-to-one mode, each female die part comprises a bearing part, a guiding part, a female die body and a driving part, the bearing parts are arranged adjacent to the supporting part, and the bearing parts are provided with containing grooves; the guiding piece is arranged at the groove bottom of the containing groove and detachably connected with the bearing piece, the guiding piece is provided with a guiding groove, the female die body is arranged in the guiding groove in a sliding mode, and the driving piece is arranged in the containing groove and connected to the female die body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile sheet metal stamping, especially relates to a die. BACKGROUND

[0002] The fender is an important component of the automobile, which is usually split into two parts for easy production and manufacturing. The upper part is roughly in the shape of a straight line and is made of sheet metal, while the lower part is in the shape of a sheet and is made of plastic. In the fender shaping process, the negative angle shaping of the wheel arch is a key link. The die usually shapes the fenders on both sides of the automobile at the same time, and the fenders on both sides are aligned in the direction of the wheel arch and shaped by two groups of pulley back withdrawal wedges or rotary back withdrawal wedges.

[0003] However, the existing pulley back withdrawal wedge or rotary back withdrawal wedge has the problems of high space occupancy and complex structure, which not only reduces the material utilization rate of the fender, but also increases the production cost, resulting in a complex fender shaping process and high production cost. SUMMARY

[0004] In view of the above situation, it is necessary to provide a die to improve the material utilization rate and reduce the production cost.

[0005] The embodiment of the application provides a die, which comprises an upper die mechanism and a lower die mechanism matched with each other, and the lower die mechanism comprises:

[0006] A male die assembly comprises a support, two male die pieces and two elastic pieces. The support is arranged on one side of the upper die mechanism along a first direction. Two side walls of the support in a second direction are respectively provided with guide grooves. Each guide groove is arranged obliquely relative to the first direction. The bottom of each guide groove is provided with a receiving groove. Each male die piece is slidingly arranged in a guide groove. Each elastic piece is arranged in a receiving groove and connected to a male die piece.

[0007] A female die assembly comprises two female die pieces arranged symmetrically on both sides of the support along a third direction and corresponding to the two male die pieces. Each female die piece comprises a bearing piece, a guide piece, a female die body and a driving piece. The bearing piece is arranged adjacent to the support. One side of the bearing piece facing the upper die mechanism is provided with an accommodation groove. The guide piece is arranged at the bottom of the accommodation groove and connected to the bearing piece. One side of the guide piece away from the bottom of the accommodation groove is provided with a guide groove. The guide groove is arranged obliquely relative to the first direction. The female die body is slidingly arranged in the guide groove. The driving piece is arranged in the accommodation groove and connected to the female die body. The first direction, the second direction and the third direction are perpendicular to each other.

[0008] When the upper die mechanism and the lower die mechanism are closed, the two male die members move close to the corresponding female die members under the push of the upper die mechanism and compress the corresponding elastic members, and at the same time, the driving member drives the female die body to move close to the male die member, so that the male die member and the female die body clamp and shape the workpiece. When the mold is opened, the compressed elastic members provide elastic force, the driving member drives the male die member to move away from the female die body, and at the same time, the driving member drives the female die body to move away from the male die member, so that the male die member and the female die body move away from each other and release the shaped workpiece, thereby completing the shaping operation of two workpieces at the same time. Therefore, by arranging the male die member and the female die body on the lower die mechanism, the problems of large shaping movement stroke, high space occupancy, and wing plate material waste caused by arranging the male die member on the upper die mechanism are avoided. By cooperating two male die members with two female die members, the shaping operation of two workpieces can be completed at the same time, the excessive space of the mold is prevented from being occupied by arranging too many shaping components, thereby making the structure of the mold more compact, optimizing the layout of the mold, improving the material utilization rate, and reducing the production cost. Through the above design, the mold realizes efficient and accurate shaping operation, improves the production efficiency and product quality.

[0009] In some embodiments, the driving member comprises two electromagnetic driving bodies arranged correspondingly along the movement direction of the female die body, one of the electromagnetic driving bodies is arranged on the slot wall of the accommodating slot away from the upper die mechanism, and the other electromagnetic driving body is arranged on the female die body.

[0010] In some embodiments, the female die body comprises:

[0011] a movable part slidingly arranged in the guide slot and connected with the electromagnetic driving body;

[0012] a matching part protruding from one end of the movable part towards the male die member and matched with the male die member.

[0013] In some embodiments, one end of the movable part away from the corresponding male die member is provided with a mounting slot.

[0014] In some embodiments, the male die member comprises:

[0015] a sliding part slidingly arranged in the corresponding guide slot and connected with the corresponding elastic member, and the sliding part extends out of the corresponding guide slot;

[0016] a male die body arranged on one side of the sliding part away from the support member and connected with the sliding part, and the male die body is provided with a shaping part on one side thereof towards the corresponding female die body.

[0017] In some embodiments, the punch body is provided with a limiting slot at the end thereof in the third direction, the limiting slot is arranged obliquely relative to the first direction, and the oblique direction of the limiting slot is parallel to the sliding direction of the punch body;

[0018] The punch assembly further comprises two limiting rods, each of the two limiting rods corresponding to one of the two punch bodies, the limiting rod being movably inserted into the corresponding limiting slot in the third direction and being rotatably connected to the support.

[0019] In some embodiments, the punch body is provided with an abutting plane, the abutting plane being located at the end face of the punch body facing the upper die mechanism.

[0020] In some embodiments, the punch assembly further comprises:

[0021] A limiting table is arranged on the side of the support facing the upper die mechanism and is detachably connected to the support, both ends of the limiting table in the second direction extending to the two guide slots respectively, the slot walls of the guide slots away from the upper die mechanism and the limiting table being used for limiting the sliding distance of the punch.

[0022] In some embodiments, both ends of the limiting table in the second direction are respectively provided with an avoiding inclined surface, the avoiding inclined surface being arranged obliquely relative to the first direction, and the distance between the two avoiding inclined surfaces increasing in the direction in which the upper die mechanism points to the lower die mechanism.

[0023] In some embodiments, the punch assembly further comprises:

[0024] A cover plate is arranged at the slot opening of the accommodating slot and is detachably connected to the bearing, the cover plate and the accommodating slot forming a movable space therebetween. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structural schematic diagram of a mold is provided for the embodiments of the present application.

[0026] Figure 2 A Figure 1 A top view of the lower die mechanism is shown.

[0027] Figure 3 A Figure 2 A sectional view of the lower die mechanism along the direction III-III is shown.

[0028] Figure 4 A Figure 2 A sectional view of the punch assembly along the direction IV-IV is shown.

[0029] Figure 5 A Figure 2 A front view of the punch assembly is shown.

[0030] Main element symbol explanation: mold 100, upper mold mechanism 101, lower mold mechanism 102, male die assembly 10, support 11, guide groove 111, receiving groove 112, male die 12, sliding part 121, male die body 122, shaping part 1221, limiting groove 1222, abutting plane 1223, elastic member 13, limiting rod 14, limiting table 15, avoiding inclined surface 151, female die assembly 20, bearing 21, containing groove 211, guide 22, guide groove 221, female die body 23, movable part 231, setting groove 2311, matching part 232, driving member 24, electromagnetic driving body 241, cover member 25, movable space 251, female die 26. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same reference numerals throughout the several figures and identical or similar components have the same reference numerals. The embodiments described below are examples for explaining the present application and are not intended to limit the present application.

[0032] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are for the purpose of description only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected or can communicate with each other, it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0034] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] Please refer to Figure 1The embodiment of the present application provides a mold 100, the mold 100 comprises an upper die mechanism 101 and a lower die mechanism 102 which are matched with each other, please refer to Figure 2 The lower die mechanism 102 comprises a male die assembly 10 and a female die assembly 20, and the mold 100 is used for shaping a workpiece. The workpiece is a one-letter type wing plate, and the mold 100 is used for negative angle shaping operation on a wheel arch position of the one-letter type wing plate.

[0036] In order to facilitate understanding and description of the embodiment of the present application, a three-dimensional coordinate system is established in part of the drawings, a first direction is the Z-axis direction shown in the drawings, a second direction is the X-axis direction shown in the drawings, and a third direction is the Y-axis direction shown in the drawings. The first direction, the second direction and the third direction are perpendicular to each other. Figure 1 Figure 1 Figure 1

[0037] Please refer to Figure 3 and Figure 4 The male die assembly 10 comprises a support 11, two male die members 12 and two elastic members 13. The support 11 is arranged on one side of the upper die mechanism 101 along the first direction, and the two side walls of the support 11 in the second direction are respectively provided with guide grooves 111. Each guide groove 111 is arranged obliquely relative to the first direction, and the groove bottom of each guide groove 111 is provided with a receiving groove 112. Each male die member 12 is slidingly arranged in a guide groove 111, and each elastic member 13 is arranged in a receiving groove 112 and connected to a male die member 12. The female die assembly 20 comprises two female die members 26 which are symmetrically arranged on the two sides of the support 11 along the third direction and correspond to the two male die members 12 one by one. Each female die member comprises a bearing 21, a guide 22, a female die body 23 and a driving member 24. The bearing 21 is arranged adjacent to the support 11, and the side of the bearing 21 facing the upper die mechanism 101 is provided with a containing groove 211. The guide 22 is arranged on the groove bottom of the containing groove 211 and connected to the bearing 21. The side of the guide 22 away from the groove bottom of the containing groove 211 is provided with a guide groove 221, and the guide groove 221 is arranged obliquely relative to the first direction. The female die body 23 is slidingly arranged in the guide groove 221, and the driving member 24 is arranged in the containing groove 211 and connected to the female die body 23. When the mold is closed, the two male die members 12 are driven to move close to the corresponding female die members 26 under the pushing of the upper die mechanism 101 and compress the corresponding elastic members 13. The driving member 24 drives the female die body 23 to move close to the corresponding male die member 12, so that the male die member 12 and the female die body 23 shape the workpiece. When the mold is opened, the elastic member 13 drives the corresponding male die member 12 to move away from the corresponding female die body 23, and the driving member 24 drives the female die body 23 to move away from the corresponding male die member 12, so as to release the shaped workpiece. Exemplarily, the elastic member 13 can be a pneumatic spring.

[0038] ​​​When the upper die mechanism 101 and the lower die mechanism 102 of the die 100 are closed, the two male die members 12 are driven to move close to the corresponding female die members 26 under the pushing of the upper die mechanism 101 and compress the corresponding elastic members 13, while the driving members 24 drive the female die bodies 23 to move close to the corresponding male die members 12, so that the male die members 12 and the female die bodies 23 clamp and shape the workpieces; when the upper die mechanism 101 and the lower die mechanism 102 are opened, the compressed elastic members 13 provide elastic force to drive the male die members 12 to move away from the corresponding female die bodies 23, while the driving members 24 drive the female die bodies 23 to move away from the corresponding male die members 12, so that the male die members 12 and the female die bodies 23 move away from each other and release the shaped workpieces, thereby completing the shaping operation of the two workpieces at the same time. In this way, the die 100 described above avoids the large shaping movement stroke, high space occupancy rate, and wing panel material waste caused by arranging the male die members 12 on the upper die mechanism 101, and can complete the shaping operation of the two workpieces at the same time through the cooperation of the two male die members 12 and the two female die members 26, thereby preventing the occupation of too much space of the die 100 by arranging too many shaping assemblies, and further making the structure of the die 100 more compact, optimizing the layout of the die 100, improving the material utilization rate, and reducing the production cost. Through the above design, the die 100 realizes efficient and accurate shaping operation, improves the production efficiency and product quality.

[0039] It can be understood that the workpieces to be shaped can be placed between the male die members 12 and the female die bodies 23 by manual placement before the die 100 is closed, or can be placed between the male die members 12 and the female die bodies 23 by the mechanical components that can move materials in the die 100.

[0040] Please refer to Figure 3 In some embodiments, the driving member 24 includes two electromagnetic driving bodies 241 arranged correspondingly along the movement direction of the female die body 23, one of which is arranged on the slot wall of the receiving slot 211 away from the upper die mechanism 101, and the other is arranged on the female die body 23, and the two electromagnetic driving bodies 241 repel each other by magnetism to drive the female die body 23 to move close to the corresponding male die member 12, or attract each other by magnetism to drive the female die body 23 to move away from the corresponding female die body 23. For example, the electromagnetic driving body 241 can be any electromagnetic driving block, electromagnetic driving part or similar electromagnetic driving plate that can generate magnetic force and attract or repel another electromagnetic driving body 241, such as an electromagnet, an electromagnetic coil, an electromagnetic clutch, etc.

[0041] Thus, by connecting the strong currents of opposite directions through the two electromagnetic driving bodies 241, repulsion can be generated between the two electromagnetic driving bodies 241, so as to drive the concave die body 23 to move close to the corresponding convex die 12, so that the concave die body 23 cooperates with the convex die 12 to reshape the workpiece. By connecting the weak currents of the same direction through the two electromagnetic driving bodies 241, attraction can be generated between the two electromagnetic driving bodies 241, so as to drive the concave die body 23 to move away from the corresponding convex die 12, so that the concave die body 23 releases the reshaped workpiece. The electromagnetic driving concave die body 23 is realized, the mechanical driving concave die body 23 is avoided, the wear of the mechanical parts is reduced, the reshaping operation and the releasing operation are shortened by the fast response of the electromagnetic driving, and the production efficiency is improved.

[0042] Please refer to Figure 3 In some embodiments, the concave die body 23 comprises a movable part 231 and a cooperating part 232. The movable part 231 is slidingly arranged in the guide groove 221 and connected with the electromagnetic driving body 241. The cooperating part 232 is protrudingly arranged at one end of the movable part 231 towards the convex die 12 and adapted to the convex die 12, and the cooperating part 232 is used to cooperate with the corresponding convex die 12 to reshape the workpiece when the mold is closed.

[0043] Thus, by setting the specific structure of the above-mentioned concave die body 23, the movable part 231 stably drives the cooperating part 232 to move close to or away from the corresponding convex die 12 under the driving of the two electromagnetic driving bodies 241, so as to accurately and quickly reshape the workpiece and improve the reshaping quality of the workpiece.

[0044] Please continue to refer to Figure 3 In some embodiments, one end of the movable part 231 away from the corresponding convex die 12 is provided with a mounting groove 2311 for mounting the electromagnetic driving body 241.

[0045] Thus, by setting the above-mentioned mounting groove 2311 to mount the electromagnetic driving body 241, the electromagnetic driving body 241 is installed inside the concave die body 23, so as to improve the movement distance range of the movable part 231 relative to the carrier 21, to ensure that the movable part 231 stably drives the cooperating part 232 to reshape the workpiece or release the workpiece, thereby improving the operation stability of the concave die body 23. In addition, the space of the movable part 231 is reasonably utilized, the electromagnetic driving body 241 is avoided to be exposed, the overall structure size of the concave die assembly 20 is reduced, and the layout of the mold 100 is optimized.

[0046] Please refer to Figure 4In some embodiments, the punch member 12 comprises a sliding part 121 and a punch body 122. The sliding part 121 is slidingly arranged in the corresponding guide groove 111 and connected with the corresponding elastic member 13, and the sliding part 121 extends out of the corresponding guide groove 111. The punch body 122 is arranged on the side of the sliding part 121 away from the support member 11 and connected with the sliding part 121, and the punch body 122 is provided with a shaping part 1221 on the side thereof facing the corresponding die body 23, and the shaping part 1221 is used for cooperating with the corresponding die body 23 to shape the workpiece.

[0047] In this way, by arranging the specific structure of the punch member 12 as described above, the sliding part 121 drives the punch body 122 to move close to the corresponding die member 26 under the push of the upper die mechanism 101 when the mold is closed, and the corresponding elastic member 13 is compressed, so that the shaping part 1221 stably cooperates with the corresponding die body 23 to shape the workpiece, thereby improving the shaping stability of the workpiece.

[0048] Please refer to Figure 5 In some embodiments, the end of the punch body 122 in the third direction is provided with a limiting groove 1222, the limiting groove 1222 is arranged obliquely relative to the first direction, and the oblique direction of the limiting groove 1222 is parallel to the sliding direction of the punch body 122. The punch assembly 10 further comprises two limiting rods 14, the two limiting rods 14 correspond to the two punch bodies 122 one by one, the limiting rod 14 is movably inserted into the corresponding limiting groove 1222 along the third direction and rotationally connected with the support member 11, and the limiting rod 14 is used for limiting the movement direction of the punch body 122.

[0049] In this way, by arranging the limiting groove 1222 and the limiting rod 14 as described above, the limiting rod 14 is movably inserted into the limiting groove 1222 along the third direction and abuts against the groove wall of the limiting groove 1222, so as to limit the movement track of the punch body 122, so that the punch body 122 always moves along the extension direction of the guide groove 111, avoiding the movement direction of the punch body 122 deviating and being misaligned with the corresponding die body 23, thereby ensuring the shaping stability of the punch member 12.

[0050] Please refer to Figure 4 In some embodiments, the punch body 122 has a bearing plane 1223, and the bearing plane 1223 is located on the end face of the punch body 122 facing the upper die mechanism 101.

[0051] In this way, by arranging the bearing plane 1223 as described above, the bearing plane 1223 provides a stable stress surface for the punch body 122, ensures that the upper die mechanism 101 can stably apply a pushing force to the punch body 122 when the mold is closed, ensures that the punch body 122 moves stably close to the corresponding die member 26, and further simplifies the structure of the punch body 122, facilitating processing and manufacturing.

[0052] Please refer to Figure 3 In some embodiments, the punch assembly 10 further comprises a limiting table 15, which is arranged on one side of the support 11 facing the upper die mechanism 101 and detachably connected with the support 11, and the two ends of the limiting table 15 in the second direction respectively extend to the two guide grooves 111, and the groove wall of the upper die mechanism 101 and the limiting table 15 are used for limiting the sliding distance of the punch body 122.

[0053] In this way, by arranging the limiting table 15 as described above, the groove wall of the upper die mechanism 101 away from the guide groove 111 abuts against the punch body 122 during the clamping, and the limiting table 15 abuts against the punch body 122 during the unclamping, so that the limiting table 15 and the groove wall of the upper die mechanism 101 away from the guide groove 111 can accurately control the sliding distance of the punch body 122, avoid excessive movement of the punch body 122 to cause collision with other components or cause excessive shaping of the workpiece, and thus improve the safety and shaping stability of the die 100. In addition, the limiting table 15 and the support 11 are detachably connected, so that the limiting table 15 and the support 11 form a split structure, which facilitates the assembly of the punch body 122 to the guide groove 111, and facilitates the maintenance and repair of the punch assembly 10.

[0054] Please continue to refer to Figure 3 In some embodiments, the limiting table 15 is respectively provided with an avoidance inclined surface 151 at the two ends in the second direction, the avoidance inclined surface 151 is arranged inclinedly relative to the first direction, and the distance between the two avoidance inclined surfaces 151 increases in the direction in which the upper die mechanism 101 points to the lower die mechanism 102.

[0055] In this way, by arranging the avoidance inclined surface 151 as described above, an avoidance space can be formed between the avoidance inclined surface 151 and the upper surface of the limiting table 15 facing the upper die mechanism 101, so as to avoid the punch body 122 during the unclamping, so that a large enough distance is formed between the punch body 122 and the concave die body 23, and the stable release of the shaped workpiece by the punch body 122 and the concave die body 23 is ensured.

[0056] Please refer to Figure 2 and Figure 3 In some embodiments, the concave die assembly 20 further comprises a cover plate 25, which is arranged in the slot opening of the accommodating groove 211 and detachably connected with the carrier 21, and the cover plate 25 and the accommodating groove 211 form a movement space 251 therebetween, and the movement space 251 is used for the movement of the concave die body 23.

[0057] Therefore, by arranging the cover plate 25, the cover plate 25 can cover part of the accommodating groove 211, avoid the debris and oil stains in the mold 100 from entering the accommodating groove 211 to interfere with the normal operation of the electromagnetic driving body 241, ensure that the two electromagnetic driving bodies 241 stably drive the die body 23 to move, and further form a moving space 251 between the cover plate 25 and the accommodating groove 211, which is used for the die body 23 to move close to or away from the punch 12, and ensure the normal sliding of the die body 23.

[0058] The working process of the mold 100 is as follows:

[0059] Firstly, the upper die mechanism 101 and the lower die mechanism 102 are in the mold opening state, and the workpiece to be shaped is placed between the punch 12 and the die body 23.

[0060] Then, the upper die mechanism 101 and the lower die mechanism 102 are closed, the two punches 12 move close to the corresponding die body 26 under the push of the upper die mechanism 101 and compress the corresponding elastic member 13, at the same time, the two electromagnetic driving bodies 241 are connected to strong currents in opposite directions, and repulsion is generated between the two electromagnetic driving bodies 241, so as to drive the die body 23 to move close to the corresponding punch 12, so that the punch 12 and the corresponding die body 23 clamp and shape the workpiece.

[0061] Finally, the upper die mechanism 101 and the lower die mechanism 102 are opened, the compressed elastic member 13 provides elastic force to drive the punch 12 to move away from the corresponding punch 12, at the same time, the two electromagnetic driving bodies 241 are connected to weak currents in the same direction, and attraction is generated between the two electromagnetic driving bodies 241, so as to drive the die body 23 to move away from the corresponding punch 12, so that the punch 12 and the corresponding die body 23 move away from each other and release the shaped workpiece. Since the punch 12 and the die body 23 are arranged on the lower die mechanism 102, the conditions such as large shaping movement stroke, high space occupancy, and material waste of the wing panel caused by arranging the punch 12 on the upper die mechanism 101 are avoided, the shaping of two workpieces is completed at the same time by the cooperation of the two punches 10 and the two die bodies 26, the excessive space of the mold 100 is prevented from being occupied by arranging too many shaping components, the structure of the mold 100 is more compact, the layout of the mold 100 is optimized, the material utilization rate is improved, and the production cost is reduced. The mold 100 realizes efficient and accurate shaping operation, improves the production efficiency and product quality.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A mold comprising an open-close matched upper mold mechanism and lower mold mechanism, characterized by, The lower die mechanism comprises: A punch assembly comprising a support, two punch members and two elastic members, the support is arranged on one side of the upper die mechanism along a first direction, two side walls of the support along a second direction are respectively provided with guide grooves, each guide groove is arranged obliquely relative to the first direction, the bottom of each guide groove is provided with a receiving groove, each punch member is slidingly arranged in a guide groove, and each elastic member is arranged in a receiving groove and connected to a punch member; A concave die assembly comprising two concave die members arranged symmetrically on both sides of the support along a third direction and corresponding to the two punch members, each concave die member comprises a bearing member, a guide member, a concave die body and a driving member, the bearing member is arranged adjacent to the support, one side of the bearing member facing the upper die mechanism is provided with a receiving groove, the guide member is arranged on the bottom of the receiving groove and connected to the bearing member, one side of the guide member away from the bottom of the receiving groove is provided with a guide groove, the guide groove is arranged obliquely relative to the first direction, the concave die body is slidingly arranged in the guide groove, the driving member is arranged in the receiving groove and connected to the concave die body, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The mold of claim 1, wherein, The driving member comprises two electromagnetic driving bodies arranged correspondingly along the movement direction of the concave die body, one of the electromagnetic driving bodies is arranged on the groove wall of the receiving groove away from the upper die mechanism, and the other electromagnetic driving body is arranged on the concave die body.

3. The mold of claim 2, wherein, The concave die body comprises: A movable part slidingly arranged in the guide groove and connected to the electromagnetic driving body; A matching part protruding from one end of the movable part facing the punch member and matched with the punch member.

4. The mold of claim 3, wherein, One end of the movable part away from the corresponding punch member is provided with a mounting groove.

5. The mold of claim 1, wherein, The punch member comprises: A sliding part slidingly arranged in the corresponding guide groove and connected to the corresponding elastic member, and the sliding part extends out of the corresponding guide groove; A punch body arranged on one side of the sliding part away from the support and connected to the sliding part, and the punch body is provided with a shaping part on one side facing the corresponding concave die body.

6. The mold of claim 5, wherein The end of the punch body in the third direction is provided with a limiting groove, the limiting groove is arranged obliquely relative to the first direction, and the oblique direction of the limiting groove is parallel to the sliding direction of the punch body; The punch assembly further comprises two limiting rods corresponding to the two punch bodies, the limiting rods are movably inserted into the corresponding limiting grooves along the third direction and rotatably connected to the support.

7. The mold of claim 5, wherein The punch body has a bearing plane, and the bearing plane is located on the end face of the punch body facing the upper die mechanism.

8. The mold according to any one of claims 1 to 7, wherein The punch assembly further comprises: A limiting table arranged on one side of the support facing the upper die mechanism and detachably connected to the support, and the two ends of the limiting table in the second direction respectively extend to the two guide grooves, the groove walls of the guide grooves away from the upper die mechanism and the limiting table are used for limiting the sliding distance of the punch member.

9. The mold of claim 8, wherein, Two ends of the limiting table in the second direction are respectively provided with position-avoiding inclined surfaces, the position-avoiding inclined surfaces are arranged obliquely relative to the first direction, and the interval between the two position-avoiding inclined surfaces increases in the direction in which the upper die mechanism points to the lower die mechanism.

10. The mold of claim 1, wherein, The recessed die assembly further comprises: A cover plate member is arranged at the slot opening of the accommodating groove and detachably connected with the bearing member, and an activity space is formed between the cover plate member and the accommodating groove.

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