Stamping die
By setting a guide knife at the end of the cutting punch away from the cutting edge and recessing a guide hole in the bottom wall of the punch, the cutting punch is guided and restricted, solving the problem of the cutting punch being affected by lateral force in the stamping die and improving product quality.
Patent Information
- Application Number
- CN202423139088.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-18
AI Technical Summary
In the process of stamping sheet metal on one side, the cutting punch of the existing stamping die is easily affected by lateral force, resulting in poor product quality.
A guide knife is provided on the lower side of the end of the cutting punch away from the cutting edge, and a guide hole is recessed on the bottom wall of the punch corresponding to the position of the guide knife. The guide knife and the guide hole are fitted with a clearance of 0.01mm to 0.02mm. The movement of the cutting punch is guided and restricted by the cooperation of the guide knife and the guide hole to prevent it from being affected by lateral forces.
It effectively prevents the cutting punch from being affected by lateral forces during the stamping process, thus improving the stamping effect and product quality.
Smart Images
Figure CN223571801U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to die technical field, concretely relates to a stamping die. BACKGROUND
[0002] Stamping is a production technology that by means of the power of conventional or special stamping equipment, sheet metal is directly subjected to deformation force in a die and deformed to obtain product parts with certain shape, size and performance. The stamping die is a special process equipment for processing sheet metal into parts in stamping, which is crucial to stamping process.
[0003] The existing stamping die includes opposite upper die and lower die, the upper die includes upper die holder, upper clamping plate, trimming punch, guide pillar and stripper plate etc. The upper clamping plate is fixed below the upper die holder, the trimming punch extends out of the upper clamping plate and extends towards the lower die, and the trimming punch part extends into the punching hole of the lower die insert of the lower die holder to realize stamping of the sheet metal during stamping. However, the gap between the trimming punch and the punching hole of the lower die insert in the existing stamping die is large, and the trimming punch is easily affected by lateral force and deviated during stamping of the single side of the sheet metal, resulting in poor quality of the stamped product. SUMMARY
[0004] Therefore, the utility model provides a stamping die to solve the problem of poor quality of the stamped product caused by the trimming punch being easily affected by lateral force during stamping of the single side of the sheet metal in the existing stamping die.
[0005] The utility model provides a stamping die, which comprises:
[0006] Upper die holder;
[0007] Trimming punch, which is arranged at the lower end of the upper die holder along the first direction and reciprocally moves along the first direction with the upper die holder, and the lower side of one end face of the trimming punch along the second direction is provided with a blade, and the lower side of the other end is provided with a contact tool, and the first direction and the second direction are perpendicular to each other;
[0008] Clamping plate, which is arranged below the upper die holder along the first direction, and the first through hole is arranged along the first direction, and the first through hole is used for the trimming punch to pass through;
[0009] Stripping plate, which is arranged below the clamping plate along the first direction, and the second through hole is arranged along the first direction, and the second through hole is used for the trimming punch to pass through;
[0010] The lower die insert is arranged at one end of the lower die seat facing the stripper plate, and a punching hole is arranged in the upper end of the lower die insert in the first direction.
[0011] According to the stamping die, at least the following beneficial effects are achieved:
[0012] The cutting edge punch is provided with a guide cutter on the lower side of one end away from the blade, and a guide hole is concavely arranged on the bottom wall of the punching hole corresponding to the position of the guide cutter, the guide cutter and the guide hole are gap matched, and the gap amount is set to 0.01mm to 0.02mm. The gap amount in this range is smaller than the gap amount between the part of the cutting edge punch away from the upper die seat and the punching hole. The cooperation and guidance of the guide cutter and the guide hole effectively prevent the cutting edge punch from being affected by the lateral force during the stamping process of moving towards the lower die insert in the first direction, so that the stamping effect is not ideal.
[0013] In an optional embodiment, the cutting edge punch is connected to the upper die seat by a first bolt;
[0014] And / or, the clamping plate is connected to the upper die seat by a second bolt;
[0015] And / or, the lower die insert is connected to the lower die seat by a third bolt.
[0016] In an optional embodiment, the cutting edge punch is provided with a first internal threaded hole on the end surface facing the upper die seat, and the first internal threaded hole is matched with the first bolt; a first through hole is formed through the upper die seat in the first direction corresponding to the position of the first internal threaded hole, and the first through hole is for the rod part of the first bolt to pass through.
[0017] In an optional embodiment, the clamping plate is formed with a second through hole through the first direction, and the second through hole is for the rod part of the second bolt to pass through; the end surface of the upper die seat facing the clamping plate is provided with a second internal threaded hole corresponding to the position of the second through hole, and the second internal threaded hole is matched with the second bolt.
[0018] In an optional embodiment, the lower die insert is formed with a third through hole through the first direction, and the third through hole is for the rod part of the third bolt to pass through; the end surface of the lower die seat facing the lower die insert is provided with a third internal threaded hole corresponding to the position of the third through hole, and the third internal threaded hole is matched with the third bolt.
[0019] In an optional embodiment, the side wall of the cutting edge punch is provided with a limiting table, and the limiting groove is concavely arranged on the upper end of the surrounding wall of the first through hole corresponding to the position of the limiting table.
[0020] In an alternative embodiment, the cutting edge of the trimming punch is provided with a first coating;
[0021] and / or the side wall of the piercing towards the cutting edge is provided with a second coating.
[0022] In an alternative embodiment, a first polishing layer is provided between the first coating and the side wall of the trimming punch;
[0023] and / or a second polishing layer is provided between the second coating and the side wall of the piercing.
[0024] In an alternative embodiment, the first coating and the second coating are both provided as a DLC coating.
[0025] In an alternative embodiment, the trimming punch is provided with a fourth internally threaded hole formed therethrough in a first direction, and a thimble is threadedly connected to the fourth internally threaded hole. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the present application, or the technical solutions in the prior art, the drawings needed in the following detailed description or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0027] Figure 1 is a perspective view of the stamping die in a stamping state according to the present application;
[0028] Figure 2 is an exploded view of the stamping die according to the present application; Figure 1
[0029] Figure 3 is a structural view of the lower die insert according to the present application; Figure 2
[0030] Figure 4 is a perspective view of the trimming punch in the stamping die according to the present application;
[0031] Figure 5 is a structural view of the trimming punch according to the present application from another perspective; Figure 4
[0032] Figure 6 is a top view of the clamping plate in the stamping die according to the present application.
[0033] EXPLANATION OF REFERENCE NUMERALS:
[0034] 100 - trimming punch, 110 - cutting edge, 120 - contact blade, 130 - first bolt, 140 - first internally threaded hole, 150 - limiting platform, 160 - fourth internally threaded hole, 170 - ejector pin;
[0035] 200 - clamping plate, 210 - first through hole, 211 - limiting groove, 220 - second bolt, 230 - second through hole;
[0036] 300 - stripper plate, 310 - second through hole;
[0037] 400 - lower die insert, 410 - punching, 411 - second coating, 420 - third bolt, 430 - third through hole. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.
[0039] In the description of the embodiments, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the embodiments and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0040] In the description of the embodiments, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.
[0041] The embodiments of the utility model will be described below in combination with Figures 1 to 6 .
[0042] According to the stamping die provided by the embodiment of the utility model, the upper die seat is provided with the trimming punch 100 at the lower end in the first direction, the trimming punch 100 reciprocates along the first direction with the upper die seat, the trimming punch 100 is provided with the blade edge 110 at the lower side of one end face in the second direction, and the other end lower side is provided with the tool rest 120; the upper die seat is provided with the clamping plate 200 below in the first direction, the first perforation 210 is formed in the first direction and penetrates the clamping plate 200, and the first perforation 210 is used for the trimming punch 100 to pass through; the clamping plate 200 is provided with the stripper plate 300 below in the first direction, the second perforation 310 is formed in the first direction and penetrates the stripper plate 300, and the second perforation 310 is used for the trimming punch 100 to pass through; the lower die seat is provided with the lower die insert 400 at one end towards the stripper plate 300, the punch hole 410 is arranged at the position corresponding to the trimming punch 100 of the upper end of the lower die insert 400 in the first direction, the bottom wall of the punch hole 410 is recessed with the guide hole at the position corresponding to the tool rest 120, the guide hole is in clearance fit with the tool rest 120, and the clearance amount is 0.01mm. It can be understood that the first direction and the second direction in the embodiment refer to the first direction and the second direction in the same vertical plane. Figure 1
[0043] The stamping die of the embodiment is provided with the tool rest 120 at the lower side of one end of the trimming punch 100 away from the blade edge 110, and the guide hole is recessed at the position of the bottom wall of the punch hole 410 corresponding to the tool rest 120, the tool rest 120 is in clearance fit with the guide hole, and the clearance amount is 0.01mm, which is smaller than the clearance amount between the part of the trimming punch 100 away from the upper die seat and the punch hole 410, so that the problem that the stamping effect is not ideal due to the influence of the lateral force on the trimming punch 100 during the movement of the trimming punch 100 along the first direction to the lower die insert 400 for stamping is effectively avoided.
[0044] In specific applications, the clearance amount of the clearance fit between the guide hole and the tool rest 120 is reasonably increased or reduced according to the actual stamping effect, for example, the clearance amount of the clearance fit between the guide hole and the tool rest 120 is 0.015mm, 0.016mm, 0.02mm, etc. in other embodiments.
[0045] It should be noted that the upper die seat and the stripper plate 300 can be connected through guide columns, and the upper die seat or the stripper plate 300 can slide along the axial direction (i.e. the first direction) of the guide column, that is, the upper die seat and the stripper plate 300 can be relatively far away or close to each other.
[0046] As shown in Figure 1 and Figure 2 As shown in the drawings, in some embodiments, the trimming punch 100 is connected to the upper die holder by a first bolt 130. This connection not only ensures the connection strength of the trimming punch 100 and the upper die holder, but also facilitates the disassembly of the trimming punch 100 and the upper die holder during the maintenance of the stamping die of the present embodiment, thereby improving the maintenance efficiency of the stamping die of the present embodiment, speeding up the product production, and reducing the production cost.
[0047] Hereinafter, the specific structure of the connection of the trimming punch 100 and the upper die holder by the first bolt 130 will be described in detail, as shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 Specifically, the end face of the trimming punch 100 facing the upper die holder is provided with a first internally threaded hole 140, which is matched with the first bolt 130; a first through hole is formed through the upper die holder at a position corresponding to the first internally threaded hole 140 along a first direction, and the first through hole is for the rod part of the first bolt 130 to pass through; when the trimming punch 100 and the upper die holder need to be assembled into one body, the first bolt 130 only needs to be passed through the first through hole from above the upper die holder and screwed into the first internally threaded hole 140; when the trimming punch 100 and the upper die holder need to be disassembled, the first bolt 130 only needs to be unscrewed from the first internally threaded hole 140 and taken out from above the upper die holder; because the first bolt 130 is installed or taken out from above the upper die holder during the disassembly and assembly of the trimming punch 100 and the upper die holder, the clamping plate 200 does not interfere with the installation or removal of the first bolt 130, and the whole disassembly and assembly process is convenient to operate.
[0048] Specifically, the first through hole is provided as a counterbore hole, one end of the first through hole facing the trimming punch 100 is provided as a small-diameter end, and the other end is provided as a large-diameter end, thereby facilitating the hidden embedding of the first bolt 130 in the first through hole without exposure.
[0049] As shown in Figure 5 and Figure 6 In some embodiments, the side wall of the trimming punch 100 is provided with a limiting table 150, and the surrounding wall of the first through hole 210 is recessed with a limiting groove 211 at a position corresponding to the limiting table 150. Because the limiting groove 211 does not penetrate the clamping plate 200 along the first direction, and the limiting table 150 and the limiting groove 211 cooperate to limit, even if the trimming punch 100 is loosened from the upper die holder, it cannot fall through the first through hole 210 and impact on the stripper plate 300 or the lower die insert 400 to cause damage.
[0050] As shown in Figure 1 and Figure 2As shown, in some embodiments, the clamping plate 200 is connected to the upper die holder by a second bolt 220; this connection method can ensure the connection strength between the clamping plate 200 and the upper die holder, and also facilitates the separation of the clamping plate 200 from the upper die holder when maintaining the stamping die of this embodiment, thereby improving the maintenance efficiency of the stamping die of this embodiment, accelerating product production speed, and reducing production costs.
[0051] This section provides a detailed description of the specific structure by which the clamping plate 200 is connected to the upper mold base via the second bolt 220, such as... Figure 1 , Figure 2 and Figure 6 As shown, specifically, the clamping plate 200 has a second through hole 230 formed along the first direction, through which the shank of the second bolt 220 passes. The end face of the upper mold base facing the clamping plate 200 has a second internal threaded hole corresponding to the second through hole 230, which matches the second bolt 220. When it is necessary to assemble the clamping plate 200 and the upper mold base into one unit, simply pass the second bolt 220 through the second through hole 230 from below the clamping plate 200 and screw it onto the second internal thread. The second bolt 220 can be unscrewed from the second internal threaded hole and removed from below the clamping plate 200 when it is necessary to separate the clamping plate 200 from the upper mold base. Since the second bolt 220 is inserted into or removed from below the clamping plate 200 during the disassembly and assembly process, the upper mold base will not interfere with the insertion or removal of the second bolt 220. This allows the first bolt 130 and the second bolt 220 to be disassembled and assembled simultaneously, resulting in high operational efficiency throughout the process.
[0052] Specifically, the second through hole 230 is configured as a countersunk hole, with one end of the second through hole 230 facing away from the upper mold base being configured as a large diameter end and the other end being configured as a small diameter end, so as to facilitate the concealment and embedding of the second bolt 220 in the second through hole 230 without it being exposed.
[0053] like Figures 1 to 3 As shown, in some embodiments, the lower die insert 400 is connected to the lower die base by a third bolt 420. This connection method can ensure the connection strength between the lower die insert 400 and the lower die base, and also facilitates the separation of the lower die insert 400 from the lower die base when maintaining the stamping die of this embodiment, thereby improving the maintenance efficiency of the stamping die of this embodiment, accelerating product production speed, and reducing production costs.
[0054] The specific structure of the lower mold insert 400 connected to the lower mold base via the third bolt 420 is described in detail here. Specifically, the lower mold insert 400 has a third through hole 430 formed along a first direction, through which the shank of the third bolt 420 passes. The lower mold base has a third internal threaded hole on its end face facing the lower mold insert 400, corresponding to the third through hole 430, and the third internal threaded hole matches the third bolt 420. When it is necessary to assemble the lower mold insert 400 and the lower mold base as a whole, simply pass the third bolt 420 through the third through hole 430 from above the lower mold insert 400 and screw it into the third internal threaded hole. When it is necessary to disassemble the lower mold insert 400 from the lower mold base, simply unscrew the third bolt 420 from the third internal threaded hole and remove it from above the lower mold insert 400. The entire disassembly and assembly process is convenient.
[0055] Specifically, the third through hole 430 is configured as a countersunk hole, with one end of the third through hole 430 facing away from the lower mold base being configured as a large-diameter end and the other end being configured as a small-diameter end, so as to facilitate the concealment and embedding of the third bolt 420 in the third through hole 430 without exposure.
[0056] In some embodiments, a first coating is provided at the cutting edge 110 of the cutting edge punch 100. This first coating has a low coefficient of friction, improving the surface finish of the cutting edge 110 and reducing the amount of aluminum powder adhering to the cutting edge punch 100 during the stamping process, thus improving the stamping effect. More specifically, the thickness of the first coating is 0.003 mm. This thickness allows the first coating to improve the anti-aluminum powder adhesion effect of the cutting edge punch 100 without affecting the stamping effect on the aluminum sheet.
[0057] like Figure 3 As shown, specifically, a second coating 411 is provided on the side wall of the punch 410 facing the cutting edge 110; the second coating 411 has a low coefficient of friction, which improves the smoothness of the side wall of the punch 410 at the cutting edge 110 of the cutting edge punch 100, and can reduce the amount of aluminum powder adhering to the punch 410 during the process of the cutting edge punch 100 stamping the aluminum sheet, thereby improving the stamping effect.
[0058] To ensure that during the stamping process, the portion of the cutting punch 100 inserted into the punch hole 410 that faces away from the guide knife 120 along the second direction is provided with a first coating; specifically, the first coating extends 20mm from the bottom end to the top end of the cutting punch 100 along the first direction; the second coating 411 extends 10mm from the top end to the bottom end of the lower die insert 400 along the first direction.
[0059] Specifically, the first polishing layer is arranged between the first coating and the side wall of the trimming punch 100. Before the first coating is formed by spraying, the side wall of the trimming punch 100 is polished, so that the first coating can be bonded more firmly on the side wall of the trimming punch 100, and the effect of preventing the aluminum powder from sticking to the trimming punch 100 is further improved. More specifically, the smoothness of the first polishing layer is better than 0.4.
[0060] Specifically, the second polishing layer is arranged between the second coating 411 and the side wall of the punching hole 410. Before the second coating 411 is formed by spraying, the side wall of the punching hole 410 is polished, so that the second coating 411 can be bonded more firmly on the side wall of the punching hole 410, and the effect of preventing the aluminum powder from sticking to the side wall of the punching hole 410 is further improved.
[0061] Specifically, the first coating and the second coating 411 are both DLC coatings. The DLC coating has the characteristics of low friction coefficient and high hardness, which can improve the effect of preventing the aluminum powder from sticking, and can also ensure that the side wall of the trimming punch 100 and the side wall of the punching hole 410 are not easily damaged by point-like pressure and concave damage, thereby ensuring the stamping quality.
[0062] As shown in Figure 2 and Figure 4 In some embodiments, the trimming punch 100 is provided with a fourth internal threaded hole 160 penetrating in the first direction, and a thimble 170 is threadedly connected to the fourth internal threaded hole 160. During the stamping process, the thimble 170 arranged in the trimming punch 100 can effectively prevent the waste from jumping up during the stamping process, and ensure the smooth progress of the stamping process. At the same time, by threadedly connecting the thimble 170 to the trimming punch 100, the connection strength of the thimble 170 and the trimming punch 100 can be ensured, and the thimble 170 and the trimming punch 100 can be easily disassembled during maintenance of the stamping die, thereby improving the maintenance efficiency of the stamping die, speeding up the product production, and reducing the production cost.
[0063] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the present application.
Claims
1. A stamping die characterized by, include: Upper mold base; A cutting punch (100) is disposed at the lower end of the upper mold base along the first direction and moves back and forth with the upper mold base along the first direction. A cutting edge (110) is provided on the lower side of one end face of the cutting punch (100) along the second direction, and a guide knife (120) is provided on the lower side of the other end. The first direction and the second direction are perpendicular to each other. A clamping plate (200) is disposed below the upper mold base along the first direction. The clamping plate (200) has a first through hole (210) formed through it along the first direction. The first through hole (210) is used for the cutting punch (100) to pass through. A stripper plate (300) is disposed below the clamping plate (200) along the first direction. The stripper plate (300) has a second through hole (310) through it along the first direction. The second through hole (310) is used for the cutting punch (100) to pass through. A lower die insert (400) is disposed at one end of the lower die base facing the stripper plate (300). A punch (410) is provided in the upper end of the lower die insert (400) along the first direction. A guide hole is recessed on the bottom wall of the punch (410) corresponding to the position of the guide knife (120). The guide hole is clearance-fitted with the guide knife (120), and the clearance is set to 0.01mm to 0.02mm.
2. A stamping die according to claim 1, wherein The cutting punch (100) is connected to the upper die base by the first bolt (130); And / or, the clamping plate (200) is connected to the upper mold base by a second bolt (220); And / or, the lower mold insert (400) is connected to the lower mold base by a third bolt (420).
3. A stamping die according to claim 2, wherein The cutting punch (100) has a first internal threaded hole (140) on its end face facing the upper die base, and the first internal threaded hole (140) matches the first bolt (130); the upper die base has a first through hole formed along the first direction at the position corresponding to the first internal threaded hole (140), and the first through hole allows the shank of the first bolt (130) to pass through.
4. The stamping die of claim 2, wherein, The clamping plate (200) has a second through hole (230) through it along the first direction. The second through hole (230) allows the shank of the second bolt (220) to pass through. The upper mold base has a second internal threaded hole at the position corresponding to the second through hole (230) on the end face of the clamping plate (200). The second internal threaded hole matches the second bolt (220).
5. The stamping die of claim 2, wherein, The lower mold insert (400) has a third through hole (430) formed along the first direction. The third through hole (430) allows the shank of the third bolt (420) to pass through. The end face of the lower mold base facing the lower mold insert (400) is provided with a third internal thread hole corresponding to the third through hole (430). The third internal thread hole matches the third bolt (420).
6. A stamping die according to any one of claims 1 to 5, wherein The side wall of the cutting punch (100) is provided with a limiting platform (150), and the upper end of the wall of the first through hole (210) is provided with a limiting groove (211) corresponding to the position of the limiting platform (150).
7. A stamping die according to any one of claims 1 to 5, wherein A first coating is arranged at the cutting edge (110) of the trimming punch (100); And / or, a second coating (411) is arranged on the side wall of the punching hole (410) towards the cutting edge (110).
8. A stamping die according to claim 7, wherein A first polishing layer is arranged between the first coating and the side wall of the trimming punch (100); And / or, a second polishing layer is arranged between the second coating (411) and the side wall of the punching hole (410).
9. A stamping die according to claim 8, wherein The first coating and the second coating (411) are both arranged as DLC coatings.
10. A stamping die according to any one of claims 1 to 5, wherein A fourth internally threaded hole (160) is formed through the trimming punch (100) in a first direction, and a thimble (170) is threadedly connected to the fourth internally threaded hole (160).