Punching die and punching molding apparatus

Abstract

The application provides a stamping die and a stamping forming equipment, which comprise an upper die assembly and a lower die assembly. The upper die assembly comprises a first die plate, a second die plate, a plurality of outer support inclined insertion assemblies, a plurality of side push inclined insertion assemblies and an upper die pressing block. The upper die pressing block comprises a first fixed block, a first outer support sliding block, a second outer support sliding block and a corner outer support sliding block. The lower die assembly comprises a third die plate and an inner push module. The inner push module comprises a first inner push sliding block, a second inner push sliding block and a corner inner push sliding block. During stamping, the outer support inclined insertion assemblies act on the first outer support sliding block to make it perform an outward pushing movement. The second outer support sliding block reversely retreats relative to the first fixed block, and performs an outward pushing movement during the retreat, and drives the corner outer support sliding block to perform a synchronous movement. The corner outer support sliding block reversely retreats relative to the second outer support sliding block, and performs an outward pushing movement during the retreat. The side push inclined insertion assemblies respectively act on the inner push module to make it respectively move towards the direction of the outer support sliding block, so that the side wall top of the to-be-stamped part is inwardly bent into an inverted buckle structure.

Description

Technical Field

[0001] This application relates to the field of stamping technology, and in particular to a stamping die and stamping equipment. Background Technology

[0002] With the increasing popularity of tablet computers, market competition is intensifying, and the demands on tablets are rising. Products are required to be lightweight and thin, while also demanding higher strength and bending resistance from the tablet casing. Therefore, when processing tablet casings, there is a desire to add undercut features to improve casing strength. This structure previously required aluminum CNC (Computerized Numerical Control) machining, resulting in high processing costs. While stamping can significantly reduce CNC machining time and lower costs, stamping dies struggle to create undercuts at corners. Utility Model Content

[0003] The purpose of this application is to provide a stamping die and stamping equipment to solve the problem that it is difficult to form undercuts at corners by stamping. The specific technical solution is as follows:

[0004] This application provides a stamping die, including an upper die assembly and a lower die assembly. The upper die assembly includes a first template, a second template, multiple external support inclined insert assemblies, multiple side push inclined insert assemblies, and an upper die pressing block. One end of each external support inclined insert assembly and the side push inclined insert assembly is detachably connected to the first template, and the other end passes through the second template and extends from its bottom, and is slidably connected to the second template. Multiple first elastic members are provided between the first template and the second template so that they are spaced apart when the die is open. The upper die pressing block includes: a first fixing block, fixed to the bottom of the second template; a first external support slider, located on both sides of the first fixing block along a first direction, and slidably connected to the bottom of the second template; a second external support slider, located on both sides of the first fixing block along a second direction, connected to the first template through a first adjusting member penetrating the second template, and protruding downwards by a first distance relative to the first fixing block, the second external support slider engaging with the inclined surface of the first fixing block; and corner external support sliders, located at the four corners of the first fixing block, connected to the first template through a second adjusting member penetrating the second template, and the blocks are... For the first fixed block protruding downward by a second distance, the corner outer support slider engages with the second outer support slider and is inclined to fit; the lower mold assembly includes a third template and an inner push module slidably disposed on the third template, the inner push module including a first inner push slider, a second inner push slider and a corner inner push slider; when the stamping die is closed for stamping, the outer support inclined insertion assembly acts on the first outer support slider to make it push outward relative to the first fixed block in a first direction, and the second outer support slider retracts in the opposite direction relative to the first fixed block, and when retracting in the opposite direction, it is relative to the first fixed block. The first fixed block moves outward along the second direction, and drives the corner outer support slider to move synchronously. The corner outer support slider retracts in the opposite direction relative to the second outer support slider, and moves outward along the first direction relative to the second outer support slider during the retraction. The side push oblique insertion component acts on the first inner push slider, the second inner push slider, and the corner inner push slider respectively, causing them to move towards the first outer support slider, the second outer support slider, and the corner outer support slider respectively, thereby bending the top of the side wall of the part to be stamped inward to form an undercut structure.

[0005] In some embodiments, the first template includes an upper mold base, an upper pad, and an upper clamping plate arranged sequentially from top to bottom and detachably connected; the second template includes a stripper back plate and a stripper plate arranged sequentially from top to bottom and detachably connected; the first elastic element is disposed between the upper mold base and the stripper plate; and the third template includes a lower template and a lower mold base arranged sequentially from top to bottom and detachably connected.

[0006] In some embodiments, the upper clamping plate is provided with two second fixing blocks, which are respectively located outside the first outer support slider and are spaced apart. The first outer support slider and the second fixing blocks are connected by a first reset member.

[0007] In some embodiments, the first template is provided with a plurality of first through holes, each first through hole including a first section penetrating the upper mold base, a second section penetrating the upper pad, and a third section penetrating the upper clamping plate. The second template is provided with second through holes corresponding to the first through holes. The external support inclined insertion assembly includes a first connector and a first inclined insertion. The top end of the first inclined insertion passes through the second through hole and extends into the third section. The bottom end of the first inclined insertion extends out of the second through hole. The first connector passes through the first section and the second section and is connected to the first inclined insertion. The side push inclined insertion assembly includes a second connector and a second inclined insertion. The top end of the second inclined insertion passes through the second through hole and extends into the third section. The bottom end of the second inclined insertion extends out of the second through hole. The second connector passes through the first section and the second section and is connected to the second inclined insertion.

[0008] In some embodiments, the first inclined plug has a first mounting hole at its top end, the first mounting hole having an internal thread, the first connector having an external thread at least at its bottom, and the first inclined plug being threadedly connected to the first connector; the second inclined plug has a second mounting hole at its top end, the second mounting hole having an internal thread, the second connector having an external thread at least at its bottom, and the second inclined plug being threadedly connected to the second connector.

[0009] In some embodiments, the first template is provided with a plurality of third through holes, the third through holes including a first sub-hole penetrating the upper mold base, a second sub-hole penetrating the upper pad plate, and a third sub-hole penetrating the upper clamping plate; the second template is provided with fourth through holes corresponding to the third through holes one by one, the fourth through holes including a fourth sub-hole penetrating the stripper back plate and a fifth sub-hole penetrating the stripper plate; the first adjusting member includes a first stop member, a second elastic member, and a first push rod arranged sequentially from top to bottom; the first stop member is installed in the second sub-hole; the second elastic member is connected to the first stop member and extends into the fifth sub-hole and is connected to the first push rod; the first push rod passes through the fifth sub-hole and is connected to the second external support slider; the second adjusting member includes a second stop member, a third elastic member, and a second push rod arranged sequentially from top to bottom; the second stop member is installed in the second sub-hole; the third elastic member is connected to the second stop member and extends into the fifth sub-hole and is connected to the second push rod; the second push rod passes through the fifth sub-hole and is connected to the corner external support slider.

[0010] In some embodiments, the fifth dividing hole includes a limiting step, the first push rod includes a first limiting boss, the first limiting boss cooperates with the limiting step to restrict the first push rod from disengaging from the fifth dividing hole, one end of the second elastic member abuts against the first stop member, and the other end abuts against the first push rod; the second push rod includes a second limiting boss, the second limiting boss cooperates with the limiting step to restrict the second push rod from disengaging from the fifth dividing hole, one end of the third elastic member abuts against the second stop member, and the other end abuts against the second push rod.

[0011] In some embodiments, the stamping die further includes a positioning element, comprising a boss portion and a rod-shaped portion, the boss portion and the rod-shaped portion forming a "T" shape; the first template has a fifth through hole, the fifth through hole including a first sub-hole penetrating the upper die base, a second sub-hole penetrating the upper pad plate and a third sub-hole penetrating the upper clamping plate; the second template has a sixth through hole corresponding to the fifth through hole, the sixth through hole including a fourth sub-hole penetrating the stripper back plate and a fifth sub-hole penetrating the stripper plate; the diameter of the first sub-hole and the second sub-hole is greater than or equal to the width of the boss portion; the diameter of the third sub-hole and the fourth sub-hole is smaller than the diameter of the boss portion but larger than the diameter of the rod-shaped portion; the boss portion is located inside the second sub-hole; the rod-shaped portion is located in the third sub-hole, the fourth sub-hole and the fifth sub-hole, and is interference-fitted with the fifth sub-hole.

[0012] In some embodiments, the lower die assembly includes a first fixed seat located outside the first inner push slider, a second fixed seat located outside the second inner push slider, and a third fixed seat located outside the corner inner push slider. The first inner push slider is slidably connected to the first fixed seat via a first return pull rod. In the closed state of the stamping die, the first inner push slider, the second inner push slider, and the corner inner push slider move in the opposite direction of the axial direction of the first return pull rod, the second return pull rod, and the third return pull rod under the action of the side push and oblique insertion, thereby approaching the first outer support slider, the second outer support slider, and the corner outer support slider. In the open state of the stamping die, the first inner push slider, the second inner push slider, and the corner inner push slider move in the positive direction of their axial direction under the action of the first return pull rod, the second return pull rod, and the third return pull rod, thereby approaching the first fixed seat, the second fixed seat, and the third fixed seat.

[0013] In some embodiments, the first return lever includes a first lever and a second reset member. The first lever includes a first free end and a first connecting end. The first free end has a first limiting portion. The first connecting end passes through the first fixed seat and is connected to the first inward sliding block. The second reset member is sleeved on the first lever and located between the first free end and the first fixed seat. The second return lever includes a second lever and a third reset member. The second lever includes a second free end and a second connecting end. The second free end has a limiting portion. The second connecting end passes through the second fixed seat and is connected to the second inward sliding block. The third reset member is sleeved on the second lever and located between the second free end and the second fixed seat. The third return lever includes a third lever and a fourth reset member. The third lever includes a third free end and a third connecting end. The third free end has a limiting portion. The third connecting end passes through the third fixed seat and is connected to the third inward sliding block. The fourth reset member is sleeved on the third lever and located between the third free end and the third fixed seat.

[0014] In some embodiments, the third template is provided with a plurality of positioning blocks, which are located inside the first inner push slider and the second inner push slider respectively. The positioning blocks are used to position the part to be stamped. The first inner push slider and the second inner push slider are provided with avoidance parts for avoiding the positioning blocks, so that the first inner push slider and the second inner push slider can move closer to the first outer support slider and the second outer support slider to act on the inner and outer sides of the part to be stamped respectively.

[0015] In some embodiments, the bottom of the first outer support slider, the second outer support slider, and the corner outer support slider has a first protrusion on the side near the part to be stamped. The side of the first protrusion is a first vertical surface, and the connection surface between the first vertical surface and the side of the first outer support slider, the second outer support slider, and the corner outer support slider is a first inclined surface. The first inner push slider, the second inner push slider, and the corner inner push slider are provided with a second inclined surface that cooperates with the first inclined surface. The second inclined surface is located above the clearance portion. When the stamping die is closed during stamping, the first vertical surface cooperates with the side of the positioning block to clamp the inner and outer sides of the part to be stamped. The second inclined surface acts on the outer side of the part to be stamped, causing the side wall of the part to be stamped to bend inward until it contacts the first inclined surface, forming an undercut structure.

[0016] A second aspect of this application provides a stamping forming apparatus, including the stamping die described above.

[0017] The stamping die and stamping equipment provided in this application embodiment include an upper die pressing block comprising a first fixed block, a first outer support slider, a second outer support slider, and a corner outer support slider. The sliders are engaged with each other at an angle or with the first fixed block at an angle, so that after outward pushing, the corner outer support slider, the first outer support slider, the second outer support slider, and the first fixed block can combine to form a closed large stamping surface. When the die is closed, the large stamping surface formed by the upper die pressing block presses against the bottom surface of the part to be stamped. Simultaneously, a side-push oblique insertion acts on the first inner push slider, the second inner push slider, and the corner inner push slider, and the inner push module moves closer to the upper pressing module. Both act on the inner and outer sides of the part to be stamped, respectively. The inner push module squeezes the top sidewall of the part to be stamped, causing it to bend inward to form an undercut structure. Because the stamping die includes a corner outer support slider and a corner inner push slider, an undercut structure can also be formed at the corner of the part to be stamped, and the undercut at the side position can transition continuously, making stress concentration less likely. Furthermore, the aforementioned undercut structure can be completed in a single stamping process without the need for subsequent CNC machining to form the undercut structure, which can significantly reduce CNC machining time and thus lower costs.

[0018] Of course, any product implementing this application does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the upper die assembly of the stamping die provided in the embodiment of this application in the open state;

[0021] Figure 2 A schematic diagram of the lower die assembly of the stamping die provided in the embodiment of this application in the open state;

[0022] Figure 3 A schematic diagram of the upper die assembly of the stamping die provided in the embodiment of this application in the closed state;

[0023] Figure 4 A schematic diagram of the lower die assembly of the stamping die provided in the embodiment of this application in the closed state;

[0024] Figure 5 A cross-sectional view of the stamping die provided in the embodiment of this application at one position along the first direction in the open state;

[0025] Figure 6A cross-sectional view along the first direction of the stamping die provided in the embodiment of this application in the closed state;

[0026] Figure 7 A cross-sectional view of the stamping die provided in the embodiment of this application at another position along the first direction in the open state;

[0027] Figure 8 A schematic diagram of the external support inclined insertion assembly, first adjusting member, second adjusting member and upper die pressure block of the stamping die provided in the embodiment of this application in the mold opening state;

[0028] Figure 9 A schematic diagram of the external support inclined insertion assembly, first adjusting member, second adjusting member, and upper die pressure block of the stamping die provided in the embodiments of this application in the closed state;

[0029] Figure 10 A cross-sectional view along the second direction of the stamping die provided in the embodiment of this application in the open state;

[0030] Figure 11 A cross-sectional view along the second direction of the stamping die provided in the embodiment of this application in the closed state.

[0031] The reference numerals in the attached drawings are as follows: Upper mold assembly 10; First template 11; Upper mold base 111; Sealing component 1111; Upper pad 112; Upper clamping plate 113; Second fixing block 1131; First reset component 1132; First through hole 114; First section 1141; Second section 1142; Third section 1143; Third through hole 115; First dividing hole 1151; Second dividing hole 1152; Third dividing hole 1153; Fifth through hole 116; 1161 (first sub-hole); 1162 (second sub-hole); 1163 (third sub-hole); 117 (through hole); 118 (positioning pin); 12 (second template); 121 (ejector back plate); 122 (ejector plate); 123 (second through hole); 124 (fourth through hole); 1241 (fourth sub-hole); 1242 (fifth sub-hole); 12421 (limiting step); 125 (sixth through hole); 1251 (fourth sub-hole); 1252 (fifth sub-hole); 13 (outer support oblique insertion assembly); 14 (first connector). 131; First oblique insert 132; First oblique surface 1321; First mounting hole 1322; Side-push oblique insert assembly 14; Second connector 141; Second oblique insert 142; Third oblique surface 1421; Second mounting hole 1422; Upper mold pressing block 15; First fixing block 151; Second sliding groove 1511; First groove 1512; First external support slider 152; First protrusion 1521; Second oblique surface 1522; Second external support slider 15 3; Second protrusion 1531; Third slide groove 1532; Corner outer support slider 154; Third protrusion 1541; First protrusion 155; Side 1551; Connecting surface 1552; First elastic element 16; First adjusting element 17; First stop element 171; Second elastic element 172; First push rod 173; First limiting boss 1731; Second adjusting element 18; Third elastic element 182; Second push rod 183; Guide post 19;

[0032] Lower mold assembly 20; Third template 21; Lower template 211; Lower mold base 212; Positioning block 213; Inward push module 22; First inward push slider 221; Second inward push slider 222; Corner inward push slider 223; Fourth inclined surface 224; Second inclined surface 225; Clearance part 226; First fixed seat 23; First return pull rod 231; First pull rod 2311; First limiting part 23111; Second reset part 2312; Second fixed seat 24; Second return lever 241; Second lever 2411; Second limiting part 24111; Third reset part 2412; Third fixed seat 25; Third return lever 251; Third lever 2511; Third limiting part 25111; Fourth reset part 2512; Lower die support plate 26; Second groove 27; Positioning part 30; Boss part 31; Rod-shaped part 32; Part to be stamped 40; First direction X; Second direction Y; Thickness direction H. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0034] This application provides a stamping die, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the stamping die includes an upper die assembly 10 and a lower die assembly 20. The upper die assembly 10 includes a first template 11, a second template 12, multiple external support inclined insertion components 13, multiple side push inclined insertion components 14, and an upper die pressing block 15. One end of the external support inclined insertion component 13 and the side push inclined insertion component 14 is detachably connected to the first template 11, and the other end passes through the second template 12 and extends out from its bottom, and is slidably connected to the second template 12. Multiple first elastic elements 16 are provided between the first template 11 and the second template 12 so that they are spaced apart when the die is open. The upper die pressing block 15 includes a first fixing block 151, a first external support slider 152, a second external support slider 153, and a corner external support slider 154. The first fixing block 151 is fixed to the bottom of the second template 12; the first external support slider 152 is located on both sides of the first fixing block 151 along the first direction X and is slidably connected to the bottom of the second template 12; the second external support slider 153 is located on both sides of the first fixing block 151 along the second direction Y, is connected to the first template 11 through the first adjusting member 17 penetrating the second template 12, and protrudes downward relative to the first fixing block 151 by a first distance, and the second external support slider 153 is engaged with the inclined surface of the first fixing block 151; the corner external support slider 154 is located at the four corners of the first fixing block 151, is connected to the first template 11 through the second adjusting member 18 penetrating the second template 12, and protrudes downward relative to the first fixing block 151 by a second distance, and the corner external support slider 154 is engaged with the second external support slider 153 and is engaged with the inclined surface. The lower mold assembly 20 includes a third template 21 and an inner push module 22 slidably disposed on the third template 21. The inner push module 22 includes a first inner push slider 221, a second inner push slider 222 and a corner inner push slider 223.

[0035] Combination Figure 5 , Figure 6When the stamping die is closed during stamping, the outer support oblique insertion assembly 13 acts on the first outer support slider 152, causing it to push outward relative to the first fixed block 151 along the first direction X. The second outer support slider 153 retracts in the opposite direction relative to the first fixed block 151, and pushes outward relative to the first fixed block 151 along the second direction Y during the retraction, driving the corner outer support slider 154 to move synchronously. The corner outer support slider 154 retracts in the opposite direction relative to the second outer support slider 153, and pushes outward relative to the second outer support slider 153 along the first direction X during the retraction. The side push oblique insertion assembly 14 acts on the first inner push slider 221, the second inner push slider 222, and the corner inner push slider 223, causing them to move towards the first outer support slider 152, the second outer support slider 153, and the corner outer support slider 154, respectively, thereby bending the top of the side wall of the part to be stamped 40 inward to form an undercut structure.

[0036] In this embodiment, the external support oblique insertion acts on the two first external support sliders 152 respectively, causing the first external support sliders 152 to push outward relative to the first fixed block 151 along the first direction X. Here, pushing outward means moving away from the first fixed block 151 along the first direction X. The second external support slider 153 protrudes downward relative to the first fixed block 151 and the first external support slider 152 by a first distance in the mold opening state. Therefore, when the mold is closed, the second external support slider 153 will retract in the opposite direction relative to the first fixed block 151 when it contacts the bottom surface of the part to be stamped 40. Since the second external support slider 153 and the first fixed block 151 are inclined, when retracting in the opposite direction, the second external support slider 153 will push outward relative to the first fixed block 151, that is, move away from the first fixed block 151 along the second direction Y. Because the second outer support slider 153 and the corner outer support slider 154 are engaged, when the second outer support slider 153 pushes outward, the corner outer support slider 154 moves synchronously with it, achieving outward pushing along the second direction Y. When the corner outer support slider 154 retracts relative to the second outer support slider 153, due to the inclined surface cooperation of the two parts, the corner outer support slider 154 pushes outward relative to the second outer support slider 153, that is, it moves away from the second outer support slider 153 along the first direction X. Thus, the corner outer support slider 154 simultaneously moves outward along the first direction X and the second direction Y. Therefore, after pushing outward, the corner outer support slider 154, the first outer support slider 152, the second outer support slider 153, and the first fixing block 151 can combine to form a closed large stamping surface. When the mold is closed, the large stamping surface formed by the upper mold pressure block 15 presses against the bottom surface of the part to be stamped 40. Simultaneously, the first inner push slider 221, the second inner push slider 222, and the corner inner push slider 223 are pushed inward by the side push and oblique insertion. The inner push module 22 moves closer to the upward pressing module, and both act on the inner and outer sides of the part to be stamped 40 respectively. The inner push module 22 squeezes the top sidewall of the part to be stamped 40, causing it to bend inward to form an undercut structure. Since the stamping die includes the corner outer support slider 154 and the corner inner push slider 223, an undercut structure can also be formed at the corner of the part to be stamped 40, and the undercut at the side position can be continuously transitioned, making it less prone to stress concentration. Furthermore, the above-mentioned undercut structure can be completed in only one stamping, without the need for subsequent CNC machining to form the undercut structure, which can significantly reduce CNC machining time and thus reduce costs.

[0037] Among them, the second outer support slider 153 protrudes a first distance relative to the first fixed block 151, and the corner outer support slider 154 protrudes a second distance relative to the first fixed block 151. The first distance can be greater than the second distance or less than the second distance.

[0038] The first template 11 and the second template 12 are spaced apart, and multiple first elastic elements 16 are provided between them. The first elastic elements 16 can be, for example, springs. The first elastic elements 16 enable the second template 12 to provide pre-pressure to the workpiece 40 to be stamped, preventing the upper mold assembly 10 from directly pressing onto the workpiece 40, thus avoiding damage to the workpiece 40 in case of misalignment. Furthermore, the multiple first elastic elements 16 help ensure that the second template 12 is subjected to uniform force.

[0039] Combination Figure 5 , Figure 6 In this application, the lower end of the external support inclined insertion assembly 13, near the side 1551 of the first external support slider 152, has two staggered and parallel first inclined surfaces 1321. The side 1551 of the first external support slider 152, near the external support inclined insertion assembly 13, has two second inclined surfaces 1522 with the same inclination angle that cooperate with the first inclined surfaces 1321 of the external support inclined insertion assembly 13. By providing double inclined surfaces on the external support inclined insertion assembly 13 and the first external support slider 152, the two inclined surfaces work together during the lateral pushing of the first external support slider 152, further improving the stability of the first external support slider 152 during movement. The double inclined surface arrangement results in the external support inclined insertion assembly 13 having two segments with different diameters, the upper segment being thicker and the lower segment being thinner. It can be understood that, combined with... Figure 8 , Figure 9 In order to enable the outer support inclined insertion assembly 13 to cooperate with the first outer support slider 152, the second outer support slider 153 and the corner outer support slider 154, the first fixing block 151 is provided with a first groove 1512 extending along the thickness direction H on the side facing the first outer support slider 152, so that when the first inclined insertion 132 described below cooperates with the second inclined surface 1522 of the first outer support slider 152, the part of the first inclined insertion 132 below the upper first inclined surface 1321 is located in the first groove 1512, and the first groove 1512 penetrates the first fixing block 151 along the thickness direction H.

[0040] It should be noted that in the mold-open state, the first inclined surface 1321 and the second inclined surface 1522 are engaged with each other. When the mold is closed, the first template 11 compresses the first elastic element 16 downward, causing the first inclined surface 1321 of the outer support inclined insertion assembly 13 to slide obliquely downward along the second inclined surface 1522, pushing the first outer support slider 152 to move horizontally outward.

[0041] Combination Figure 5 , Figure 6The bottom of the side push-in component 14 is provided with a third inclined surface 1421 near the side 1551 of the first inner push slider 221, the second inner push slider 222 and the corner inner push slider 223. The first inner push slider 221, the second inner push slider 222 and the corner inner push slider 223 are provided with a fourth inclined surface 224 that cooperates with the third inclined surface 1421 near the side 1551 of the side push-in component 14. When the mold is closed, the third inclined surface 1421 slides along the fourth inclined surface 224 until the two lose their cooperation, so that the inner push module 22 moves towards the upper mold pressure block 15 under the action of the side push-in component 14.

[0042] Optionally, the first template 11 includes an upper mold base 111, an upper pad 112, and an upper clamping plate 113 arranged sequentially from top to bottom and detachably connected; the second template 12 includes a stripper back plate 121 and a stripper plate 122 arranged sequentially from top to bottom and detachably connected; and a first elastic member 16 is disposed between the upper mold base 111 and the stripper plate 122. Optionally, as... Figure 7 As shown, the upper mold base 111, upper pad 112, upper clamping plate 113, and stripper back plate 121 are provided with through holes 117. The first elastic member 16 is restricted within the through holes 117 by the sealing member 1111 located at the top of the upper mold base 111 and the stripper plate 122. The third template 21 includes a lower template 211 and a lower mold base 212 arranged sequentially from top to bottom and detachably connected.

[0043] The first template 11 is divided into a detachably connected upper mold base 111, upper backing plate 112, and upper clamping plate 113. Appropriate materials and thicknesses can be selected based on the specific function of each plate. For example, the upper mold base 111 is mainly used for fixed connection with the stamping equipment, and its size can be larger than the upper backing plate 112 and upper clamping plate 113. Since the upper mold base 111 is not a primary load-bearing plate, materials with lower strength and hardness can be used. To increase the deformation resistance of the upper mold base 111, its thickness can be increased. Because the upper mold base 111 is not a primary load-bearing plate, its material is relatively inexpensive, and increasing its thickness will not significantly increase costs. The upper backing plate 112, as the primary load-bearing plate, can be made of materials with higher strength and hardness, and its thickness can be appropriately reduced. Deformation resistance is mainly achieved by thickening the upper mold base 111, thus reducing costs. The upper clamping plate 113 is also not a primary load-bearing plate, and more installation structures can be designed to facilitate the installation of components. The detachable connection between the upper mold base 111, the upper backing plate 112, and the upper clamping plate 113 can be, for example, a screw connection. The second template 12 is divided into a detachably connected stripper backing plate 121 and a stripper plate 122. Appropriate materials and thicknesses can be selected based on the specific function of each plate; for example, the stripper backing plate 121 can be made of a material with higher strength and hardness, while the stripper plate 122 can be made of a material with lower strength and hardness. The detachable connection between the stripper backing plate 121 and the stripper plate 122 can be, for example, a screw connection. The third template 21 is detachably connected to the lower template 211 and the lower mold base 212. Appropriate materials and thicknesses can be selected based on the specific function of each plate; for example, the lower template 211 can be made of a material with higher strength and hardness, while the lower mold base 212 can be made of a material with lower strength and hardness. To ensure the rigidity of the third template 21, the thickness of the lower mold base 212 can be increased.

[0044] The lower die assembly 20 also includes a lower die support plate 26, which is placed on the lower die plate 211 and is used to support the part 40 to be stamped.

[0045] refer to Figure 8 , Figure 9 The first external support slider 152 is slidably connected to the bottom of the second template 12, which is also the slidable connection between the first external support slider 152 and the bottom of the upper clamping plate 113. Optionally, a first groove (not shown in the figure), such as a dovetail groove, can be provided at the bottom of the upper clamping plate 113. The first external support slider 152 is provided with a first protrusion 1521 that matches the first groove. The slidable connection between the first external support slider 152 and the upper clamping plate 113 is achieved through the cooperation between the first protrusion 1521 and the first groove. Of course, the positions of the first groove and the first protrusion 1521 can be interchanged, that is, the first groove is provided on the first external support slider 152, and the first protrusion 1521 is provided on the bottom of the upper clamping plate 113.

[0046] To ensure that the sliding trajectory does not deviate when the second outer support slider 153 slides along the inclined plane with the first fixed block 151, the first fixed block 151 is provided with a second sliding groove 1511, and the second outer support slider 153 is provided with a second protrusion 1531. The sliding connection between the second outer support slider 153 and the first fixed block 151 is achieved through the cooperation between the second protrusion 1531 and the second sliding groove 1511. Of course, the positions of the second sliding groove 1511 and the second protrusion 1531 can be interchanged, that is, the second sliding groove 1511 is set on the second outer support slider 153, and the second protrusion 1531 is set on the first fixed block 151.

[0047] To ensure that the sliding trajectory does not deviate when the corner outer support slider 154 and the second outer support slider 153 slide along the inclined plane, the second outer support slider 153 is provided with a third groove 1532, and the corner outer support slider 154 is provided with a third protrusion 1541. The sliding connection between the corner outer support slider 154 and the second outer support slider 153 is achieved through the cooperation between the third protrusion 1541 and the third groove 1532. Of course, the positions of the third groove 1532 and the third protrusion 1541 can be interchanged, that is, the third groove 1532 is set on the corner outer support slider 154, and the third protrusion 1541 is set on the second outer support slider 153.

[0048] In some embodiments of this application, reference is made to Figure 1 , Figure 3 , Figure 5 , Figure 6 The upper clamping plate 113 is provided with two second fixing blocks 1131. The second fixing blocks 1131 are located on the outside of the first outer support slider 152 and are spaced apart. The first outer support slider 152 and the second fixing blocks 1131 are connected by the first reset member 1132.

[0049] In this embodiment, the first external support slider 152 is slidably connected to the bottom of the second template 12, i.e., the bottom of the upper clamping plate 113. The first external support slider 152 is connected to the second fixing block 1131 via a first reset member 1132. Thus, after the outward pushing force of the external support inclined insertion assembly 13 on the first external support slider 152 is removed, the first external support slider 152 can automatically reset to the position contacting the first fixing block 151 under the action of the first reset member 1132. By setting the first reset member 1132, the first external support slider 152 can achieve automatic reset, improving the automation effect of the stamping die and simplifying operation.

[0050] In some embodiments of this application, reference is made to Figure 5 , Figure 6The first template 11 is provided with a plurality of first through holes 114. The first through holes 114 include a first section 1141 that penetrates the upper mold base 111, a second section 1142 that penetrates the upper pad 112, and a third section 1143 that penetrates the upper clamping plate 113. The second template 12 is provided with second through holes 123 that correspond one-to-one with the first through holes 114. The external support inclined insertion assembly 13 includes a first connector 131 and a first inclined insertion 132. The top end of the first inclined insertion 132 passes through the second through hole 123 and extends into the third section 1143. The bottom end of the first inclined insertion 132 extends out of the second through hole 123. The first connector 131 passes through the first section 1141 and the second section 1142 and is connected to the first inclined insertion 132. The side-push angled insertion assembly 14 includes a second connector 141 and a second angled insertion 142. The top end of the second angled insertion 142 extends through the second through hole 123 into the third segment 1143. The second connector 141 passes through the first segment 1141 and the second segment 1142 and is connected to the second angled insertion 142. The bottom end of the second angled insertion 142 extends out of the second through hole 123.

[0051] One end of the first inclined insert 132 is located in the upper clamping plate 113 and passes downward through the stripper back plate 121 and stripper plate 122. The first inclined insert 132 is fixed by the first connector 131 at its top end. In this way, the reverse force received by the outer support inclined insert when pushing the first outer support slider 152 is partly transmitted to the upper pad plate 112 through the first inclined insert 132, and partly located between the first inclined insert 132 and the first connector 131. The force transmitted to the upper pad plate 112 is a surface force, which is not easy to cause stress concentration, thus helping to extend the service life of the upper pad plate 112. The bottom end of the first inclined insert 132 extends out of the second through hole 123 so as to cooperate with the first outer support slider 152 at an angle.

[0052] One end of the second inclined insert 142 is located in the upper clamping plate 113 and passes downward through the stripping back plate 121 and stripping plate 122. The second inclined insert 142 is fixed by the second connector 141 at its top end. In this way, when the side-push inclined insert pushes the inner push module 22, part of the reverse force is transmitted to the upper pad plate 112 through the second inclined insert 142, and part of it is located between the second inclined insert 142 and the second connector 141. The force transmitted to the upper pad plate 112 is a surface force, which is not easy to cause stress concentration, thus helping to extend the service life of the upper pad plate 112. The bottom end of the second inclined insert 142 extends out of the second through hole 123 to make inclined surface engagement with the inner push module 22.

[0053] Optionally, refer to Figure 5 , Figure 6The first inclined insert 132 has a first mounting hole 1322 at its top end, and the first mounting hole 1322 is provided with an internal thread. The first connector 131 is provided with an external thread at least at its bottom. The first inclined insert 132 is threadedly connected to the first connector 131. The second inclined insert 142 has a second mounting hole 1422 at its top end, and the second mounting hole 1422 is provided with an internal thread. The second connector 141 is provided with an external thread at least at its bottom. The second inclined insert 142 is threadedly connected to the second connector 141.

[0054] The first connector 131 and the first inclined insert 132 are connected by threads, which has the advantage of simple structure. The first connector 131 can be a screw. The through hole of the first section 1141 is divided into two parts with different diameters. The screw head is located in the upper half with a larger diameter, and the screw shank is located in the lower half with a smaller diameter. After the top of the first inclined insert 132 is threaded to the first connector 131, when the first inclined insert 132 is subjected to a reverse force, the pressure is mainly relieved through the contact surface between the first inclined insert 132 and the upper pad 112. The force on the upper clamping plate 113 is very small, so ordinary materials can be used to make it, reducing costs and improving the service life of the upper clamping plate 113. Furthermore, the upper pad 112 is subjected to surface force, which also helps to improve the service life of the upper pad 112.

[0055] The second connector 141 and the second inclined insert 142 are connected by threads, offering the advantage of a simple structure. The second connector 141 can be a screw. The through hole of the first section 1141 is divided into two parts with different diameters: the screw head is located in the larger diameter upper half, and the screw shank is located in the smaller diameter lower half. After the top of the second inclined insert 142 is threaded to the second connector 141, when the second inclined insert 142 is subjected to a reverse force, the pressure is mainly relieved through the contact surface between the second inclined insert 142 and the upper pad 112. The force on the upper clamping plate 113 is very small, therefore it can be made of ordinary materials, reducing costs and improving the service life of the upper clamping plate 113. Furthermore, the upper pad 112 experiences surface force, which also helps to improve its service life.

[0056] Optionally, the external support inclined insertion assembly 13 further includes a third connector (not shown in the figure), which is detachably connected to the first inclined insertion 132 from the side 1551 of the upper clamping plate 113. By simultaneously fixing the first inclined insertion 132 with the first connector 131 and the third connector, the fixing effect of the first inclined insertion 132 can be improved. The third connector presses against the first inclined insertion 132 through the side 1551, so during assembly, the third connector can be used to press against the first insertion first, and then the first connector 131 can be connected to the first inclined insertion 132. The side push inclined insertion assembly 14 further includes a fourth connector (not shown in the figure), which is detachably connected to the second inclined insertion 142 from the side 1551 of the upper clamping plate 113. By simultaneously fixing the second inclined insertion 142 with the second connector 141 and the fourth connector, the fixing effect of the second inclined insertion 142 can be improved. The fourth connector is pressed against the second inclined insert 142 by the side 1551. In this way, during the assembly process, the fourth connector can be pressed first, and then the second connector 141 can be connected to the second inclined insert 142.

[0057] The third and fourth connectors can also be screws.

[0058] In some embodiments of this application, reference is made to Figure 10 , Figure 11 The first template 11 has multiple third through holes 115, including a first branch hole 1151 penetrating the upper mold base 111, a second branch hole 1152 penetrating the upper pad 112, and a third branch hole 1153 penetrating the upper clamping plate 113. The second template 12 has fourth through holes 124 corresponding to the third through holes 115. The fourth through holes 124 include a fourth branch hole 1241 penetrating the stripper back plate 121 and a fifth branch hole 1242 penetrating the stripper plate 122. The first adjusting member 17 includes a first stop member 171, a second elastic member 172, and a first push rod 173 arranged sequentially from top to bottom. The first stop member 171 is installed on the second mold base 111. Inside the dividing hole 1152, the second elastic member 172 is connected to the first stop member 171 and extends into the fifth dividing hole 1242, and is connected to the first push rod 173. The first push rod 173 passes through the fifth dividing hole 1242 and is connected to the second outer support slider 153. The second adjusting member 18 includes a second stop member, a third elastic member 182 and a second push rod 183 arranged sequentially from top to bottom. The second stop member is installed in the second dividing hole 1152. The third elastic member 182 is connected to the second stop member and extends into the fifth dividing hole 1242, and is connected to the second push rod 183. The second push rod 183 passes through the fifth dividing hole 1242 and is connected to the corner outer support slider 154.

[0059] In this embodiment, the first adjusting member 17 is a telescopic component composed of a first stop member 171, a second elastic member 172, and a first push rod 173. It has a simple structure and is easy to implement. The first stop member 171 is used to limit the top end of the first elastic member 16. The first stop member 171 is installed in the second dividing hole 1152, which is located inside the upper pad 112. The upper pad 112 is the main load-bearing component. Since the upper pad 112 is generally made of a material with high strength and hardness, it can improve the service life of the stamping die. In the mold-opening state, the first ejector rod 173 is pushed out by the second elastic element 172, causing the second outer support slider 153 to extend a first distance relative to the first fixed block 151. During the mold-closing process, since the second outer support slider 153 contacts the part to be stamped 40 before the first fixed block 151, it will compress the second elastic element 172 in the opposite direction, causing the second outer support slider 153 to retract relative to the first fixed block 151. During the retraction process, due to the inclined surface cooperation between the second outer support slider 153 and the first fixed block 151, the second outer support slider 153 completes the outward push.

[0060] The second adjusting member 18 is a telescopic component consisting of a second stop member (not shown in the figure), a third elastic member 182, and a second push rod 183. It has a simple structure and is easy to implement. The second stop member is used to limit the top end of the second elastic member 172. The second stop member is installed in the second dividing hole 1152, which is located inside the upper pad 112. The upper pad 112 is the main load-bearing component. Since the upper pad 112 is generally made of a material with high strength and hardness, it can improve the service life of the stamping die. In the mold-opening state, the second ejector pin 183 is ejected by the third elastic element 182, causing the corner outer support slider 154 to extend a second distance relative to the first fixed block 151. During the mold-closing process, since the corner outer support slider 154 contacts the part to be stamped 40 before the second outer support slider 153, it will compress the third elastic element 182 in the opposite direction, causing the corner outer support slider 154 to retract relative to the second outer support slider 153. During the retraction process, due to the inclined surface cooperation between the corner outer support slider 154 and the second outer support slider 153, the corner outer support slider 154 completes the outward push.

[0061] Understandably, the first distance can also be greater than the second distance. In this case, the second outer support slider 153 retracts simultaneously relative to the first fixed block 151 and the corner outer support slider 154, which can realize the outward push of both the second outer support slider 153 and the corner outer support slider 154.

[0062] The first adjusting member 17 and the second adjusting member 18 can also be a sleeve-type telescopic rod structure, with the first and second sleeves connected by an elastic element.

[0063] Optionally, refer to Figure 10 , Figure 11The fifth dividing hole 1242 includes a limiting step 12421, and the first push rod 173 includes a first limiting boss 1731. The first limiting boss 1731 cooperates with the limiting step 12421 to restrict the first push rod 173 from disengaging from the fifth dividing hole 1242. One end of the second elastic member 172 abuts against the first stop member 171, and the other end abuts against the first push rod 173. The second push rod 183 includes a second limiting boss. The second limiting boss cooperates with the limiting step 12421 to restrict the second push rod 183 from disengaging from the fifth dividing hole 1242. One end of the third elastic member 182 abuts against the second stop member, and the other end abuts against the second push rod 183.

[0064] In this embodiment, by providing a limiting step 12421 within the fifth dividing hole 1242, the first push rod 173 includes a first limiting boss 1731. The first limiting boss 1731 cooperates with the limiting step 12421 to limit the first push rod 173, preventing it from dislodging from the fifth dividing hole 1242. Furthermore, by limiting the position of the first push rod 173 with the limiting step 12421, the connection between the second elastic member 172 and the first push rod 173 can be simplified; for example, they can be connected simply by abutting without the aid of other connecting parts.

[0065] The second push rod 183 includes a second limiting boss (not shown in the figure, but refer to the first limiting boss 1731). The second limiting boss cooperates with the limiting step 12421 to limit the second push rod 183 and prevent it from coming out of the fifth dividing hole 1242. Furthermore, by setting the limiting step 12421 to restrict the position of the second push rod 183, the connection between the third elastic member 182 and the second push rod 183 can be simplified; for example, they can be connected simply by abutting without the aid of other connecting parts.

[0066] The limiting step 12421 can be directly set on the side wall of the fifth dividing hole 1242, or the limiting step 12421 can be formed by changing the diameter of the fifth dividing hole 1242. For example, the upper part of the fifth dividing hole 1242 has a larger diameter and the lower part has a smaller diameter, thereby forming the limiting step 12421.

[0067] Optionally, at least a portion of the second dividing hole 1152 is provided with internal threads, and the first stop member 171 and the second stop member are provided with external threads. The first stop member 171 is threadedly connected to the second dividing hole 1152, and the second stop member is threadedly connected to the second dividing hole 1152. Here, the second dividing hole 1152 is a dividing hole corresponding to the position of the second outer support slider 153 and the corner outer support slider 154.

[0068] In some embodiments, reference Figure 10 , Figure 11The stamping die also includes multiple positioning components 30, including a boss portion 31 and a rod-shaped portion 32, the boss portion 31 and the rod-shaped portion 32 forming a "T" shape; the first template 11 is provided with a fifth through hole 116, the fifth through hole 116 including a first sub-hole 1161 penetrating the upper die base 111, a second sub-hole 1162 penetrating the upper pad 112 and a third sub-hole 1163 penetrating the upper clamping plate 113, the second template 12 is provided with a sixth through hole 125 corresponding to the fifth through hole 116, the sixth through hole 125 including a through hole penetrating the stripper back The fourth sub-hole 1251 of plate 121 and the fifth sub-hole 1252 penetrating stripper plate 122 have diameters greater than or equal to the width of the boss portion 31. The diameters of the third sub-hole 1163 and the fourth sub-hole 1251 are smaller than the diameter of the boss portion 31 but larger than the diameter of the rod-shaped portion 32. The boss portion 31 is located inside the second sub-hole 1162, and the rod-shaped portion 32 is located in the third sub-hole 1163, the fourth sub-hole 1251, and the fifth sub-hole 1252, and is interference-fitted with the fifth sub-hole 1252.

[0069] By setting the positioning element 30 and inserting it into the fifth through hole 116 and the sixth through hole 125, the upper mold base 111, upper pad 112, upper clamping plate 113, stripper back plate 121, and stripper plate 122 can be initially positioned. Then, screws are tightened between the upper mold base 111, upper pad 112, and upper clamping plate 113, and between the stripper back plate 121 and stripper plate 122. This improves the assembly efficiency of the first template 11 and the second template 12. Furthermore, the positioning element 30 also guides the vertical movement of the first template 11 and the second template 12, ensuring that their movement trajectories are straight.

[0070] Optionally, the positioning element 30 can be a pin.

[0071] In some embodiments, such as Figure 7 As shown, the first template 11 may be provided with multiple positioning pins 118. Optionally, two positioning pins 118 are provided, distributed diagonally. The positioning pins 118 are tightly fitted with the upper mold base 111, the upper pad 112, and the upper clamping plate 113. The first template 11 is also provided with multiple guide posts 19 that pass through the upper clamping plate 113, and pass through the stripper back plate 121 and the stripper plate 122 and extend downward, for the alignment between the upper mold assembly 10 and the lower mold assembly 20 during the mold closing process, ensuring accurate alignment of the upper mold assembly 10 and the lower mold assembly 20 along the first direction X and the second direction Y.

[0072] In some embodiments, reference Figure 2 , Figure 4 , Figure 10 and Figure 11The lower die assembly 20 includes a first fixed seat 23 located outside the first inner push slider 221, a second fixed seat 24 located outside the second inner push slider 222, and a third fixed seat 25 located outside the corner inner push slider 223. The first inner push slider 221 is slidably connected to the first fixed seat 23 via a first return pull rod 231. In the closed state of the stamping die, the first inner push slider 221, the second inner push slider 222, and the corner inner push slider 223 move along the first return pull rod 231 and the second return pull rod 24 under the action of side push and oblique insertion. The pull rod 241 and the third return pull rod 251 move in the opposite direction of their axial direction, thereby approaching the first outer support slider 152, the second outer support slider 153 and the corner outer support slider 154; in the open state of the stamping die, the first inner push slider 221, the second inner push slider 222 and the corner inner push slider 223 move in the positive direction of their axial direction under the action of the first return pull rod 231, the second return pull rod 241 and the third return pull rod 251, thereby approaching the first fixed seat 23, the second fixed seat 24 and the third fixed seat 25.

[0073] The first push slider 221 is slidably connected to the first fixed seat 23 via the first return lever 231. The first return lever 231 always applies a force to the first push slider 221 along the axial direction of the first return lever 231, pressing it against the first fixed seat 23. Only when the side push and oblique insertion act on the first push slider 221, the oblique surface cooperation between the two causes the side push and oblique insertion to push the first push slider 221 to move away from the first fixed seat 23 along the axial direction of the first return lever 231, thereby realizing the push movement of the first push slider 221.

[0074] The second push slider 222 is slidably connected to the second fixed seat 24 via the second return rod 241. The second return rod 241 always applies a force to the second push slider 222 along the axial direction of the second return rod 241, pressing it against the second fixed seat 24. Only when the side push and oblique insertion act on the second push slider 222, the oblique surface cooperation between the two causes the side push and oblique insertion to push the second push slider 222 to move away from the second fixed seat 24 along the axial direction of the second return rod 241, thereby realizing the push movement of the second push slider 222.

[0075] The corner push slider 223 is slidably connected to the third fixed seat 25 via the third return rod 251. The third return rod 251 always applies a force to the corner push slider 223 along the axial direction of the third return rod 251 to press against the third fixed seat 25. Only when the side push and oblique insertion act on the corner push slider 223, the oblique surface cooperation between the two causes the side push and oblique insertion to push the corner push slider 223 to move away from the third fixed seat 25 along the axial direction of the third return rod 251, thereby realizing the push movement of the third push slider.

[0076] Understandable, for reference Figure 2 , Figure 4 In order to enable the second inclined insert 142 to cooperate with the first inner push slider 221, the second inner push slider 222 and the corner outer support slider 154, the first fixed seat 23, the second fixed seat 24 and the third fixed seat 25 are provided with a second groove 27 extending along the thickness direction H on the side facing the second inclined insert 142, so that when the second inclined insert 142 cooperates with the fourth inclined surface 224 of the first inner push slider 221, the second inner push slider 222 and the corner inner push slider 223, the end of the second inclined insert 142 is located in the second groove 27. The second groove 27 can be through or not through each fixed seat along the thickness direction H.

[0077] Optionally, refer to Figure 10 and Figure 11 The first return lever 231 includes a first lever 2311 and a second reset member 2312. The first lever 2311 includes a first free end and a first connecting end. The first free end has a first limiting part 23111. The first connecting end passes through the first fixed seat 23 and is connected to the first inner push slider 221. The second reset member 2312 is sleeved on the first lever 2311 and is located between the first free end and the first fixed seat 23. The second return lever 241 includes a second lever 2411 and a third reset member 2412. The second lever 2411 includes a second free end and a second connecting end. The second free end has a second limiting part 24111. The second connecting end passes through the second fixed seat 24 and is connected to the second inner push slider 222. The third reset member 2412 is sleeved on the second lever 2411 and is located between the second free end and the second fixed seat 24. The third return lever 251 includes a third lever 2511 and a fourth reset member 2512. The third lever 2511 includes a third free end and a third connecting end. The third free end has a third limiting part 25111. The third connecting end passes through the third fixed seat 25 and is connected to the third inner push slider. The fourth reset member 2512 is sleeved on the third lever 2511 and is located between the third free end and the third fixed seat 25.

[0078] In this embodiment, the return lever includes a reset component and a lever. The lever serves as a guide, guiding the slider to move along the axial direction of the lever. The reset component serves as an automatic reset component. When the side-pushing and oblique-insertion force is removed, the reset component can automatically reset the slider to its initial position, that is, the position close to the fixed seat.

[0079] It should be noted that the fixing of the first fixing seat 23, the second fixing seat 24, and the third fixing seat 25 to the third template 21 can all be first positioned by locating pins and then fixed by screws. Figure 10 The locating pin is inserted into the fixed seat.

[0080] In some embodiments, reference Figure 2 and Figure 10 The third template 21 is provided with multiple positioning blocks 213, which are located inside the first inner push slider 221 and the second inner push slider 222, for example, two are provided inside each inner push slider, that is, a total of 8 are provided. The positioning blocks 213 are used to position the part to be stamped 40. The first inner push slider 221 and the second inner push slider 222 are provided with avoidance parts 226 for avoiding the positioning blocks 213, so that the first inner push slider 221 and the second inner push slider 222 can move closer to the first outer support slider 152 and the second outer support slider 153, so as to act on the inner and outer sides of the part to be stamped 40 respectively.

[0081] The positioning block 213 allows for quick and accurate positioning of the part to be stamped 40, thus preventing unnecessary damage to the stamping die caused by inaccurate positioning of the part to be stamped 40. The first inner push slider 221 and the second inner push slider 222 are designed with clearance parts 226 at the positions corresponding to the positioning block 213, so that the first inner push slider 221 and the second inner push slider 222 are not obstructed when approaching the part to be stamped 40.

[0082] In some embodiments of this application, reference is made to Figure 5 , Figure 6 , Figure 8 , Figure 9 The bottom of the first outer support slider 152, the second outer support slider 153, and the corner outer support slider 154 near the side of the part to be stamped 40 has a first protrusion 155. The side 1551 of the first protrusion 155 is a first vertical surface, and the connection surface 1552 between the first vertical surface and the side 1551 of the first outer support slider 152, the second outer support slider 153, and the corner outer support slider 154 is a first inclined surface. The first inner push slider 221, the second inner push slider 222, and the corner inner push slider 223 are provided with a second inclined surface 225 that cooperates with the first inclined surface. The second inclined surface 225 is located above the clearance part 226. When the stamping die is closed during stamping, the first vertical surface cooperates with the side 1551 of the positioning block 213 to clamp the inner and outer sides of the part to be stamped 40. The second inclined surface 225 acts on the outer side of the part to be stamped 40, causing the side wall of the part to be stamped 40 to bend inward until it contacts the first inclined surface, forming an undercut structure.

[0083] In this embodiment, the top of the part to be stamped 40 is formed with an undercut structure through the cooperation of the outer support slider and the inner push slider. This undercut structure is present not only on the sides but also at the corners. The degree of bending of the undercut can be adjusted by adjusting the tilt angles of the first and second inclined surfaces 225. This method is simple and easy to implement. The included angle between the first and second inclined surfaces 225 can be 30°-60°, preferably 45°.

[0084] A second aspect of this application provides a stamping forming apparatus, including the stamping die described above.

[0085] In this embodiment, the stamping equipment can be, for example, a punch press or automated production equipment. The stamping die includes not only the first outer support slider 152 and the first inner push slider 221, the second outer support slider 153 and the second inner push slider 222 on the side, but also the corner outer support slider 154 and the corner inner push slider 223. Therefore, a structure with undercuts can also be formed at the corner of the part to be stamped 40, and the undercuts at the side position can be continuously transitioned, making it less prone to stress concentration. Furthermore, the above-mentioned undercut structure can be completed in only one stamping, without the need for subsequent CNC machining to form the undercut structure, which can significantly reduce CNC machining time and thus reduce costs.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A stamping die, characterized in that, The system includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes a first template, a second template, multiple external support inclined insertion components, multiple side push inclined insertion components, and an upper mold pressing block. One end of each external support inclined insertion component and the side push inclined insertion component is detachably connected to the first template, and the other end passes through the second template and extends out from its bottom, and is slidably connected to the second template. Multiple first elastic elements are provided between the first template and the second template so that they are spaced apart when the mold is open. The upper molding block includes: The first fixing block is fixed to the bottom of the second template; The first external support slider is located on both sides of the first fixed block along the first direction and is slidably connected to the bottom of the second template; The second external support slider is located on both sides of the first fixed block along the second direction, and is connected to the first template through the first adjustment piece that passes through the second template. It protrudes downward relative to the first fixed block by a first distance, and the second external support slider cooperates with the inclined surface of the first fixed block. The corner support slider is located at the four corners of the first fixed block. It is connected to the first template through the second adjusting piece that passes through the second template. The block protrudes downwards by a second distance relative to the first fixed block. The corner support slider is engaged with the second support slider and the inclined surface is matched. The lower mold assembly includes a third template and an inner push module slidably disposed on the third template. The inner push module includes a first inner push slider, a second inner push slider, and a corner inner push slider. When the stamping die is closed during stamping, the outer support oblique insertion assembly acts on the first outer support slider, causing it to push outward relative to the first fixed block in a first direction. The second outer support slider retracts in the opposite direction relative to the first fixed block, and pushes outward relative to the first fixed block in a second direction during the retraction, thereby driving the corner outer support slider to move synchronously. The corner outer support slider retracts in the opposite direction relative to the second outer support slider, and pushes outward relative to the second outer support slider in the first direction during the retraction. The side push oblique insertion assembly acts on the first inner push slider, the second inner push slider, and the corner inner push slider, respectively, causing them to move towards the first outer support slider, the second outer support slider, and the corner outer support slider, thereby causing the top of the side wall of the part to be stamped to bend inward to form an undercut structure.

2. The stamping die according to claim 1, characterized in that, The first template includes an upper mold base, an upper pad, and an upper clamping plate arranged sequentially from top to bottom and detachably connected. The second template includes a stripper back plate and a stripper plate arranged sequentially from top to bottom and detachably connected. The first elastic element is disposed between the upper mold base and the stripper plate. The third template includes a lower template and a lower mold base that are arranged sequentially from top to bottom and can be detachably connected.

3. The stamping die according to claim 2, characterized in that, The upper clamping plate is provided with two second fixing blocks, which are located on the outside of the first outer support slider and are spaced apart. The first outer support slider and the second fixing blocks are connected by a first reset member.

4. The stamping die according to claim 2, characterized in that, The first template has multiple first through holes, each first through hole including a first section penetrating the upper mold base, a second section penetrating the upper pad, and a third section penetrating the upper clamping plate. The second template has second through holes corresponding to the first through holes. The external support inclined insertion assembly includes a first connector and a first inclined insertion. The top end of the first inclined insertion passes through the second through hole and extends into the third section. The bottom end of the first inclined insertion extends out of the second through hole. The first connector passes through the first section and the second section and connects to the first inclined insertion. The side-push angled insertion assembly includes a second connector and a second angled insertion. The top end of the second angled insertion passes through the second through hole and extends into the third segment. The bottom end of the second angled insertion extends out of the second through hole. The second connector passes through the first segment and the second segment and is connected to the second angled insertion.

5. The stamping die according to claim 4, characterized in that, The first inclined insert has a first mounting hole at its top end, and the first mounting hole has an internal thread. The first connector has an external thread at least at its bottom, and the first inclined insert is threadedly connected to the first connector. The second oblique insert has a second mounting hole at its top end, and the second mounting hole has an internal thread. The second connector has an external thread at least at its bottom, and the second oblique insert is threadedly connected to the second connector.

6. The stamping die according to claim 2, characterized in that, The first template is provided with a plurality of third through holes, the third through holes including a first sub-hole penetrating the upper mold base, a second sub-hole penetrating the upper pad plate and a third sub-hole penetrating the upper clamping plate; the second template is provided with a fourth through hole corresponding to each of the third through holes, the fourth through hole including a fourth sub-hole penetrating the stripper back plate and a fifth sub-hole penetrating the stripper plate. The first adjusting member includes a first stop member, a second elastic member and a first push rod arranged sequentially from top to bottom. The first stop member is installed in the second dividing hole. The second elastic member is connected to the first stop member and extends into the fifth dividing hole and is connected to the first push rod. The first push rod passes through the fifth dividing hole and is connected to the second external support slider. The second adjusting member includes a second stop member, a third elastic member, and a second push rod arranged sequentially from top to bottom. The second stop member is installed in the second dividing hole. The third elastic member is connected to the second stop member and extends into the fifth dividing hole and is connected to the second push rod. The second push rod passes through the fifth dividing hole and is connected to the corner outer support slider.

7. The stamping die according to claim 6, characterized in that, The fifth dividing hole includes a limiting step, and the first push rod includes a first limiting boss. The first limiting boss cooperates with the limiting step to restrict the first push rod from coming out of the fifth dividing hole. One end of the second elastic member abuts against the first stop member, and the other end abuts against the first push rod. The second push rod includes a second limiting boss, which cooperates with the limiting step to restrict the second push rod from dislodging from the fifth dividing hole. One end of the third elastic member abuts against the second stop member, and the other end abuts against the second push rod.

8. The stamping die according to claim 2, characterized in that, The stamping die also includes a positioning component, comprising a boss portion and a rod-shaped portion, wherein the boss portion and the rod-shaped portion form a "T" shape; The first template has a fifth through hole, which includes a first sub-hole penetrating the upper mold base, a second sub-hole penetrating the upper pad, and a third sub-hole penetrating the upper clamping plate. The second template has a sixth through hole corresponding to the fifth through hole. The sixth through hole includes a fourth sub-hole penetrating the stripper back plate and a fifth sub-hole penetrating the stripper plate. The diameters of the first and second sub-holes are greater than or equal to the width of the boss portion. The diameters of the third and fourth sub-holes are smaller than the diameter of the boss portion but larger than the diameter of the rod-shaped portion. The boss portion is located inside the second sub-hole, and the rod-shaped portion is located in the third, fourth, and fifth sub-holes and is interference-fitted with the fifth sub-hole.

9. The stamping die according to claim 2, characterized in that, The lower mold assembly includes a first fixed seat located outside the first inner push slider, a second fixed seat located outside the second inner push slider, and a third fixed seat located outside the corner inner push slider. The first inner push slider is slidably connected to the first fixed seat via a first return rod, the second inner push slider is slidably connected to the second fixed seat via a second return rod, and the corner inner push slider is slidably connected to the third fixed seat via a third return rod. In the closed state of the stamping die, the first inner push slider, the second inner push slider, and the corner inner push slider move in the opposite direction of the axis of the first return tie rod, the second return tie rod, and the third return tie rod under the action of the side push and oblique insertion, thereby approaching the first outer support slider, the second outer support slider, and the corner outer support slider; In the open state of the stamping die, the first inner push slider, the second inner push slider, and the corner inner push slider move in the positive direction of their axial direction under the action of the first return pull rod, the second return pull rod, and the third return pull rod, thereby approaching the first fixed seat, the second fixed seat, and the third fixed seat.

10. The stamping die according to claim 9, characterized in that, The first return lever includes a first lever and a second reset member. The first lever includes a first free end and a first connecting end. The first free end has a first limiting part. The first connecting end passes through the first fixed seat and is connected to the first inner push slider. The second reset member is sleeved on the first lever and is located between the first free end and the first fixed seat. The second return lever includes a second lever and a third reset member. The second lever includes a second free end and a second connecting end. The second free end has a limiting part. The second connecting end passes through the second fixed seat and is connected to the second inner push slider. The third reset member is sleeved on the second lever and is located between the second free end and the second fixed seat. The third return lever includes a third lever and a fourth reset component. The third lever includes a third free end and a third connecting end. The third free end has a limiting part. The third connecting end passes through the third fixed seat and is connected to the corner push slider. The fourth reset component is sleeved on the third lever and is located between the third free end and the third fixed seat.

11. The stamping die according to claim 2, characterized in that, The third template is provided with a plurality of positioning blocks, which are located inside the first inner push slider and the second inner push slider respectively. The positioning blocks are used to position the part to be stamped. The first inner push slider and the second inner push slider are provided with a clearance part for avoiding the positioning blocks, so that the first inner push slider and the second inner push slider can move closer to the first outer support slider and the second outer support slider respectively, so as to act on the inner and outer sides of the part to be stamped.

12. The stamping die according to claim 11, characterized in that, The bottom of the first external support slider, the second external support slider, and the corner external support slider has a first protrusion on the side near the part to be stamped. The side of the first protrusion is a first vertical surface, and the connection surface between the first vertical surface and the side of the first external support slider, the second external support slider, and the corner external support slider is a first inclined surface. The first inward sliding block, the second inward sliding block and the corner inward sliding block are provided with a second inclined surface that cooperates with the first inclined surface, and the second inclined surface is located above the avoidance part; When the stamping die is closed during stamping, the first vertical surface cooperates with the side of the positioning block to clamp the inner and outer sides of the part to be stamped. The second inclined surface acts on the outer side of the part to be stamped, causing the side wall of the part to be stamped to bend inward until it contacts the first inclined surface, forming an undercut structure.

13. A stamping forming equipment, characterized in that, The stamping die includes any one of claims 1-12.

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