Continuous stamping composite die structure capable of improving stamping precision

Abstract

The invention discloses a continuous stamping composite die structure capable of improving stamping precision, and relates to the technical field of continuous stamping, the continuous stamping composite die structure comprises an upper die top plate and a lower die bottom plate, and the continuous stamping composite die structure further comprises a nick machining area located between the upper die top plate and the lower die bottom plate; the anti-explosion valve nick machining device comprises a nick machining area, a template mechanism and a nick assembly, the template mechanism is arranged in the nick machining area, the nick assembly is installed in the template mechanism, and precision machining of nicks in an anti-explosion valve is achieved through cooperation of the nick assembly and the template mechanism; the nicking assembly comprises a nitrogen spring, a pressurizing base, an adjusting block and a male die, the nitrogen spring provides extrusion force, the pressurizing base, the adjusting block and the male die are sequentially attached together, the explosion-proof valve integrated top cover piece does not need to be matched with a precision servo punching machine, and the requirement that the die closing precision of a nicking machining area is smaller than or equal to 0.01 mm can be met by using a common precision punching machine. Therefore, the product precision requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of stamping processing, and in particular to a continuous stamping composite die structure for improving stamping accuracy. Background Art

[0002] As a core component of new energy battery structures, explosion-proof valves play a vital role in safety. The original intention of their design is to effectively prevent short circuits or overcharges that may occur in the battery, thereby ensuring the stable operation of the battery system. Once an abnormality occurs inside the battery, the explosion-proof valve can respond quickly and safely discharge the accumulated gas inside through the pressure release mechanism, significantly reducing the risk of battery rupture or explosion.

[0003] In the production process of new energy battery structural parts, the traditional manufacturing method of explosion-proof valves usually involves punching of single bodies and subsequent welding assembly steps. This process requires a tight and reliable connection between the explosion-proof valve and the battery top cover. However, this assembly process not only increases the complexity of production, but also increases costs. In addition, there may be potential leakage hazards at the welding joints, posing a threat to the overall safety performance of the battery. In view of this, some advanced lithium battery designs adopt an integrated structure that directly integrates the explosion-proof valve into the battery top cover. This innovative design not only significantly enhances the tightness of the combination of the explosion-proof valve and the battery body, improving the overall safety protection level, but also greatly simplifies the production process and effectively reduces manufacturing costs.

[0004] It is worth noting that the lithium-ion power battery top cover currently used in the market (with an integrated design of explosion-proof valve and top cover) has extremely strict requirements on the precision of stamping products, and the mold closing accuracy must be controlled within 0.01mm. In traditional processes, in order to meet the high-precision manufacturing requirements of explosion-proof valve blasting notches, it is highly dependent on precision servo punching machines. However, in the actual processing of the explosion-proof valve integrated top cover sheet 100, the length of the stamping die can be extended to 1500-2000mm, the weight can reach 3000kg, and the required stamping tonnage is as high as 500-800 tons. Such a large-scale precision servo punching machine is not only extremely expensive to purchase, but also faces many challenges such as maintenance in actual applications.

[0005] In view of this, we are committed to developing an innovative continuous stamping composite die structure, which can achieve the high tonnage requirements (>500 tons) of top cover sheet forming and the high precision requirements (±0.01mm) of explosion-proof valve forming on ordinary toggle punch presses. This breakthrough design not only greatly reduces production costs, but also improves production efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a continuous stamping composite die structure with improved stamping accuracy. The structure can achieve the high tonnage requirement (>500 tons) of top cover sheet forming and the high precision requirement (±0.01mm) of explosion-proof valve forming on an ordinary toggle punch press, thereby solving the problems of high cost and low production efficiency.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A continuous stamping composite die structure for improving stamping accuracy comprises an upper die top plate and a lower die bottom plate, and also comprises:

[0009] A notch processing area, the notch processing area is located between the upper die top plate and the lower die bottom plate;

[0010] A template mechanism and a notch assembly, wherein the template mechanism is arranged in a notch processing area, the notch assembly is installed in the template mechanism, and the cooperation between the notch assembly and the template mechanism realizes the precision processing of the notch in the explosion-proof valve;

[0011] The notching assembly includes a nitrogen spring, a pressurizing base, an adjusting block and a punch. The nitrogen spring provides an extrusion force to make the pressurizing base, the adjusting block and the punch fit together in sequence, thereby controlling the position of the punch and thus controlling the notching depth.

[0012] In addition, multiple sets of external limit columns are arranged between the upper die top plate and the lower die bottom plate. The external limit columns are used to limit the excess stamping kinetic energy of the punch press to prevent the excess kinetic energy from being transmitted to the product, thereby avoiding fluctuations in product processing and affecting the processing quality.

[0013] As a further solution of the present invention: the template mechanism includes an upper template component and a lower template component;

[0014] The upper mold assembly includes an upper attachment plate connected to the bottom surface of the upper mold top plate, an upper mold plate is arranged below the upper attachment plate, and a stripper plate is connected to the bottom of the upper mold plate;

[0015] The lower mold assembly includes a lower mold connected above the lower mold bottom plate, the lower mold bottom plate is connected to the lower mold, and the top surface of the lower mold is installed with a supporting plate.

[0016] As a further solution of the present invention: the stripping plate in the upper template assembly is arranged corresponding to the supporting plate in the lower template assembly, and the processing of the notch is achieved when the stripping plate and the supporting plate are closed.

[0017] As a further solution of the present invention: the lower template assembly further includes a concave mold, and the concave mold is installed on the supporting plate;

[0018] In addition, multiple groups of internal limit columns are arranged on the support plate, and the multiple internal limit columns are evenly distributed around the die to limit the position of the stripper plate when it is closed, and to support the stripper plate to avoid the excess pressure of the scoring component from squeezing the stripper plate for a long time, causing the stripper plate to deform and affecting the accuracy of the scoring forming.

[0019] As a further solution of the present invention: the punch is arranged in the stripping plate, and the stripping plate is provided with a sliding groove, and the punch is slidably matched with the sliding groove.

[0020] As a further solution of the present invention: a notch is provided at one end of the punch, and a plurality of groups of air holes are also provided on the punch to prevent the notch from not forming a convex bulge during processing.

[0021] As a further solution of the present invention: a linear slot is provided on the top surface of the stripping plate, the linear slot is connected with the sliding slot, a draw plate is slidably arranged in the linear slot, an adjustment block is arranged in the draw plate, and the bottom end of the adjustment block corresponds to the top end of the punch;

[0022] The protruding position of the punch is controlled by the adjusting block, thereby controlling the depth of the notch.

[0023] As a further solution of the present invention: a matching groove is opened in the upper template corresponding to the position of the punch, the pressure base is arranged in the matching groove, and the bottom surface of the pressure base is against the top surface of the adjustment block, and a punch is slidably adapted in the sliding groove. When the top of the stripping plate is unrestricted, the punch can be installed from the top and hung on the T-shaped sliding groove.

[0024] As a further solution of the present invention: a mounting circular groove is formed through the upper mold top plate and the upper attachment plate at the corresponding convex mold position, a nitrogen spring is installed in the mounting circular groove, and the telescopic end of the nitrogen spring is against the top surface of the pressurizing base.

[0025] As a further solution of the present invention: a limiting groove is provided on the side of one end of the drawing plate extending to the outside, a limiting pad is installed on the stripping plate, and the limiting pad is inserted into the limiting groove. The adjusting block is pulled out from the center of the mold by the drawing plate, and after the adjusting block is replaced, it is pushed into the mold along the straight slot, which facilitates the replacement of the adjusting block, saves processing time when processing different notch depths, and improves processing efficiency.

[0026] Beneficial effects of the present invention:

[0027] A notch assembly is installed in the template mechanism of the present invention, and the precision processing of the notch in the integrated top cover sheet of the explosion-proof valve is realized through the cooperation of the notch assembly and the template mechanism, so that the integrated top cover sheet of the explosion-proof valve does not need to be matched with a precision servo stamping press, and an ordinary precision punching press can be used to meet the closing mold precision requirement of the notch processing area ≤0.01mm, thereby meeting the product precision requirement.

[0028] The present invention arranges multiple groups of internal limit columns on the support plate, and the multiple internal limit columns are evenly distributed around the die, so as to limit the position of the stripper plate when it is closed and support the stripper plate, thereby preventing the excess pressure of the scoring component from squeezing the stripper plate for a long time, causing the stripper plate to deform, and affecting the accuracy of the scoring forming.

[0029] In the present invention, since the thickness accuracy of the adjustment block can be controlled between 0.002mm and 0.005mm by a grinder, the notch accuracy can also reach this level, further improving the accuracy of the notch processing. In terms of notch depth control, adjustment blocks of different thicknesses can be replaced according to needs for precise adjustment to adapt to the processing of different notches. Moreover, there is no need to disassemble the entire mold when replacing the adjustment block. The adjustment block can be pulled out from the center of the mold by a draw plate. After the adjustment block is replaced, it can be pushed into the mold along the straight slot, which facilitates the replacement of the adjustment block, further saves processing time, improves the production efficiency of the entire production line, and saves equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 1 is a schematic diagram of the longitudinal cross-sectional structure of the notch processing area of ​​the first embodiment of the present invention;

[0032] Figure 2 yes Figure 1 The enlarged structural diagram of part A in the middle;

[0033] Figure 3 yes Figure 2 The enlarged structural diagram of part B in the middle;

[0034] Figure 4 It is a schematic diagram of the structure of the male mold of the present invention;

[0035] Figure 5 It is a schematic diagram of the transverse cross-sectional structure of the notch processing area in the first embodiment of the present invention;

[0036] Figure 6 It is a schematic diagram of the cross-sectional structure of a continuous stamping composite die according to an embodiment of the present invention;

[0037] Figure 7 yes Figure 6 The enlarged structural diagram of the middle C part;

[0038] Figure 8 This is a schematic diagram of the structure of the integrated top cover sheet of the explosion-proof valve of the present invention;

[0039] Fig. 9 This is a schematic diagram of the structure of the scoring component in the second embodiment of the present invention in the explosion-proof valve single stamping die Figure 1 ;

[0040] Fig.10 This is a schematic diagram of the structure of the scoring component in the second embodiment of the present invention in the explosion-proof valve single stamping die Figure 2 ;

[0041] Fig.11 It is a schematic diagram of the single structure of the explosion-proof valve of the present invention;

[0042] Fig.12 It is a schematic diagram of the structure of the processing material strip according to the first embodiment of the present invention.

[0043] In the figure: 1. upper die top plate; 2. upper accessory plate; 3. upper die plate; 4. stripper plate; 41. sliding groove; 5. supporting plate; 6. lower die plate; 7. lower die bottom plate; 8. concave die; 9. inner limit column; 10. notch assembly; 101. fixed plate; 102. nitrogen spring; 103. pressurized base; 104. adjusting block; 105. draw plate; 106. punch; 1061. notch portion; 1062. air hole; 1063. hanging table; 107. limit pad; 20. notch processing area; 100. explosion-proof valve integrated top cover plate; 101. top cover plate body; 200. explosion-proof valve; 201. notch; 300. explosion-proof valve monomer stamping die; 400. explosion-proof valve monomer. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The explosion-proof valve integrated top cover sheet 100 described in the present invention is as follows Figure 8 As shown, it includes a top cover sheet body 101 and an explosion-proof valve 200 integrally arranged on the top cover sheet body 101, and the explosion-proof valve 200 is processed with a notch 201. The notch 201 serves as a potential explosion point. When the internal pressure of the battery reaches a dangerous level, it can guide the explosion-proof valve 200 to rupture in a predetermined manner, thereby safely releasing the internal pressure.

[0046] Furthermore, for the processing of the notch 201, the molding tonnage itself only needs 1.0 ton, and the optimal molding accuracy needs to be precisely controlled to about 0.005 mm.

[0047] Embodiment 1

[0048] like Figure 1-Figure 8 As shown, the present embodiment provides a continuous stamping composite mold structure for improving stamping accuracy, the structure includes an upper mold top plate 1 and a lower mold bottom plate 7, a notch processing area 20 is arranged between the upper mold top plate 1 and the lower mold bottom plate 7, a template mechanism is arranged in the notch processing area 20, and a notch component 10 is installed in the template mechanism, and the notch component 10 is coordinated with the template mechanism to achieve precision processing of the notch 201 in the integrated top cover sheet 100 of the explosion-proof valve, so that the integrated top cover sheet 100 of the explosion-proof valve does not need to be matched with a precision servo stamping press, and an ordinary precision press (the accuracy range of the ordinary precision press is ±0.1mm) can meet the closing mold accuracy requirement of the notch processing area 20 ≤0.01mm, thereby meeting the product accuracy requirement.

[0049] It should be noted that in the present embodiment, the actual continuous stamping production process of the explosion-proof valve integrated top cover sheet 100 includes not only the formation of the notch 201, but also a series of sequential processing steps. Fig.12 As shown, specifically:

[0050] Pre-punching of guide nail holes - pre-punching of pole holes and injection holes - cutting off of excess material at both ends - straight trimming - T-shaped trimming - pole pre-forming and positive and negative pole symbol forming - pole hole and injection hole forming, explosion-proof valve 200 pre-forming - explosion-proof valve 200 forming - notch 201 forming - back chamfering - half cutting - fine punching - hole back chamfering - leveling - blanking.

[0051] The notch processing area 20 is used for notch 201 forming and is a part between the upper die top plate 1 and the lower die bottom plate 7 in the entire continuous stamping composite die. The other parts of the die are all existing technologies and the specific structure is not described here.

[0052] Furthermore, if Figure 1 As shown, the upper die top plate 1 and the lower die bottom plate 7 are the basic structures in the continuous stamping composite die, and multiple groups of external limit columns are arranged between the upper die top plate 1 and the lower die bottom plate 7. The external limit columns are used to limit the excess stamping kinetic energy of the punch press to maintain the excess kinetic energy from being transmitted to the product, avoiding fluctuations in product processing and further affecting the processing quality.

[0053] Specific as Figure 1 and Figure 2As shown, the template mechanism in this embodiment includes an upper template assembly and a lower template assembly, wherein the upper template assembly includes an upper accessory plate 2 connected to the bottom surface of the upper template top plate 1, an upper template 3 is arranged below the upper accessory plate 2, and a stripping plate 4 is connected to the bottom of the upper template 3, further, the lower template assembly includes a lower template 6 connected above the lower template bottom plate 7, the lower template 6 is connected to the lower template bottom plate 7, and a supporting plate 5 is installed on the top surface of the lower template 6.

[0054] The stripping plate 4 in the upper template assembly and the supporting plate 5 in the lower template assembly are arranged correspondingly, and when the two are closed, the processing of the notch 201 is realized.

[0055] Furthermore, the lower template assembly also includes a die 8, wherein the die 8 is mounted on a support plate 5, and a plurality of groups of internal limit columns 9 are also provided on the support plate 5, and the plurality of internal limit columns 9 are evenly distributed around the die 8 to limit the position of the stripper plate 4 when it is closed, and to support the stripper plate 4, so as to prevent the excess pressure of the notching assembly 10 from squeezing the stripper plate 4 for a long time, causing deformation of the stripper plate 4, and affecting the forming accuracy of the notch 201.

[0056] Furthermore, if Figure 2 As shown, the scoring assembly 10 in this embodiment includes a fixing plate 101 , a nitrogen spring 102 , a pressurizing base 103 , an adjusting block 104 , a draw plate 105 and a punch 106 .

[0057] Among them, specific Figure 3 As shown, a sliding groove 41 is provided on the stripper plate 4, and the longitudinal section (i.e. the width direction of the mold) of the sliding groove 41 is T-shaped. A punch 106 is slidably adapted in the sliding groove 41. When the top of the stripper plate 4 is unrestricted, the punch 106 can be installed from the top and hung on the T-shaped sliding groove 41.

[0058] Furthermore, the punch 106 in this embodiment has an elliptical shape, and its specific shape can be set according to the shape of the explosion-proof valve 200. The head (the end close to the die 8) end face of the punch 106 is provided with a notch 1061, and the notch 1061 is used to form a notch 201 on the explosion-proof valve 200 when processing the explosion-proof valve integrated top cover sheet 100, and multiple groups of air holes 1062 are also provided on the head end face of the punch 106, and the multiple groups of air holes 1062 are arranged around the notch 1061 to prevent the notch 201 from not forming during the processing. Hanging platforms 1063 are symmetrically provided at both ends of the tail of the punch 106, which are used to cooperate with the sliding groove 41 to limit the protruding position of the punch 106 in the open mold state, so as to avoid the protruding distance of the punch 106 being large and affecting the mold closing efficiency, and the two groups of hanging platforms 1063 in this embodiment are of different heights, which are used to prevent the installation of the punch 106.

[0059] It should be noted in this embodiment that the male mold 106 and the female mold 8 cooperate with each other, and the male mold 106 corresponds to the position of the explosion-proof valve 200 on the explosion-proof valve integrated top cover sheet 100 .

[0060] Furthermore, specifically Figure 2 As shown, a linear slot extending to the outside is also provided on the top surface of the stripping plate 4, the linear slot is located at the top of the sliding slot 41 and is connected to the sliding slot 41, a draw plate 105 is slidably arranged in the linear slot, a limiting slot is provided on the side of one end of the draw plate 105 extending to the outside, a limiting pad 107 is installed on the stripping plate 4, the limiting pad 107 is inserted into the limiting slot to limit the horizontal forward and backward movement of the draw plate 105.

[0061] Furthermore, specifically Figure 2 and Figure 3 As shown, a plug-in slot is opened at the position of the draw plate 105 corresponding to the punch 106, and an adjusting block 104 is arranged in the plug-in slot, and the bottom end of the adjusting block 104 passes through the plug-in slot and abuts against the top end of the punch 106, wherein the bottom surface of the adjusting block 104 is completely fitted with the top surface of the punch 106, thereby controlling the protruding position of the punch 106 and further controlling the depth of the notch 201.

[0062] Furthermore, if Figure 2 As shown, a matching groove is provided at the position of the upper mold plate 3 corresponding to the punch 106, a pressurizing base 103 is arranged in the matching groove, and a mounting circular groove is provided through the upper mold top plate 1 and the upper attachment plate 2 corresponding to the position of the punch 106, a nitrogen spring 102 is installed in the mounting circular groove, the telescopic end of the nitrogen spring 102 is against the top surface of the pressurizing base 103, and the bottom surface of the pressurizing base 103 is against the top surface of the adjusting block 104, and the nitrogen spring 102 provides an extrusion force, so that the pressurizing base 103, the adjusting block 104 and the punch 106 are sequentially attached together, so as to realize the position control of the punch 106, and then control the depth of the notch 201. A fixing groove is provided at the top of the upper mold plate 3, a fixing plate 101 is installed in the fixing groove, and the nitrogen spring 102 is also installed on the fixing plate 101 by bolts.

[0063] Furthermore, if Figure 5-Figure 7 As shown, the operation method of the continuous stamping composite die structure in this embodiment is:

[0064] The ordinary punch press is debugged to completely eliminate the punch press shaft sleeve assembly clearance, and then the punch press drives the upper die top plate 1 downward to close the mold, and the upper die top plate 1 drives the upper mold assembly and the notch assembly 10 to close the mold with the lower mold assembly. At the moment of closing the mold, the punch 106 is squeezed by the explosion-proof valve integrated top cover plate 100 and moves upward in the sliding groove 41 until it contacts the bottom surface of the adjustment block 104, and is subjected to the pressure provided by the nitrogen spring 102 (the nitrogen spring 102 provides a pressure of 2-5 tons) to maintain the distance from the protruding molding surface, and the notch 201 of the designed depth is processed in the explosion-proof valve 200 through the notch portion 1061 of the punch 106 and the die 8.

[0065] It should be noted that the adjustment block 104 can be adjusted and replaced according to the required depth of the notch 201. When the punch press is debugged, the adjustment block 104 in the continuous stamping composite mold is replaced synchronously (eliminating the error of the ordinary punch press during the debugging stage). Specifically, the adjustment block 104 is pulled out from the center of the mold by the draw plate 105. After the adjustment block 104 is replaced, it is pushed into the mold along the straight slot.

[0066] It should also be noted in this embodiment that, since the nitrogen spring 102 applies a certain pressure to the adjustment block 104 before the mold is closed, the adjustment block 104 and the draw plate 105 are both in a limited state in the mold opening or mold closing state, and will not jump, and will not affect the position of the adjustment block 104. Therefore, it should be noted that the nitrogen spring 102 needs to be released when replacing.

[0067] Furthermore, since the thickness accuracy of the adjustment block 104 can be controlled between 0.002mm-0.005mm by a grinder, the accuracy of the notch 201 can also reach this level, further improving the accuracy of the notch 201 processing. In terms of controlling the depth of the notch 201, the adjustment blocks 104 of different thicknesses can be replaced as needed for precise adjustment to adapt to the processing of different notches 201. In addition, there is no need to disassemble the entire mold when replacing the adjustment block 104, which further saves processing time, improves the production efficiency of the entire production line, and saves equipment costs.

[0068] Embodiment 2

[0069] like Figure 9-11 As shown, the continuous stamping composite mold structure for improving stamping accuracy in the first embodiment can also be set in the explosion-proof valve monomer stamping mold 300, and is used to process the explosion-proof valve monomer 400. Similarly, notches 201 of different depths can be processed, thereby improving production efficiency and saving production costs.

[0070] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A continuous stamping composite die structure for improving stamping accuracy, comprising an upper die top plate (1) and a lower die bottom plate (7), characterized in that: Also includes: A notch processing area (20), the notch processing area (20) being located between the upper die top plate (1) and the lower die bottom plate (7); A template mechanism and a notch assembly (10), wherein the template mechanism is arranged in a notch processing area (20), the notch assembly (10) is installed in the template mechanism, and the notch assembly (10) cooperates with the template mechanism to achieve precision processing of a notch (201) in an explosion-proof valve (200); The notching assembly (10) comprises a nitrogen spring (102), a pressurizing base (103), an adjusting block (104) and a punch (106); the nitrogen spring (102) provides an extrusion force to make the pressurizing base (103), the adjusting block (104) and the punch (106) fit together in sequence.

2. A continuous stamping composite die structure for improving stamping accuracy according to claim 1, characterized in that: The template mechanism comprises an upper template component and a lower template component; The upper mold assembly comprises an upper attachment plate (2) connected to the bottom surface of the upper mold top plate (1), an upper mold plate (3) is arranged below the upper attachment plate (2), and a stripper plate (4) is connected to the bottom of the upper mold plate (3); The lower mold assembly comprises a lower mold (6) connected above the lower mold bottom plate (7); the lower mold bottom plate (7) is connected to the lower mold (6); and a supporting plate (5) is installed on the top surface of the lower mold (6).

3. A continuous stamping composite die structure for improving stamping accuracy according to claim 2, characterized in that: The stripping plate (4) in the upper template assembly is arranged correspondingly to the supporting plate (5) in the lower template assembly, and when the stripping plate (4) and the supporting plate (5) are closed, the notch (201) is processed.

4. A continuous stamping composite die structure for improving stamping accuracy according to claim 2, characterized in that: The lower mold assembly also includes a concave mold (8), and the concave mold (8) is installed on the supporting plate (5); Furthermore, a plurality of groups of inner limiting columns (9) are arranged on the supporting plate (5), and the plurality of inner limiting columns (9) are evenly distributed around the concave mold (8).

5. The continuous stamping composite die structure for improving stamping accuracy according to claim 2, characterized in that: The convex mold (106) is arranged in the stripping plate (4), and the stripping plate (4) is provided with a sliding groove (41), and the convex mold (106) is slidably matched with the sliding groove (41).

6. A continuous stamping composite die structure for improving stamping accuracy according to claim 5, characterized in that: A notched portion (1061) is provided at one end of the male mold (106), and a plurality of groups of air holes (1062) are also provided on the male mold (106).

7. A continuous stamping composite die structure for improving stamping accuracy according to claim 5, characterized in that: The stripping plate (4) has a linear slot on its top surface, the linear slot is connected to the sliding slot (41), a draw plate (105) is slidably arranged in the linear slot, an adjustment block (104) is arranged in the draw plate (105), and the bottom end of the adjustment block (104) corresponds to the top end of the punch (106); The protruding position of the punch (106) is controlled by the adjusting block (104), thereby controlling the depth of the notch (201).

8. A continuous stamping composite die structure for improving stamping accuracy according to claim 7, characterized in that: The upper mold plate (3) is provided with a matching groove at a position corresponding to the convex mold (106), the pressurizing base (103) is arranged in the matching groove, and the bottom surface of the pressurizing base (103) abuts against the top surface of the adjusting block (104).

9. A continuous stamping composite die structure for improving stamping accuracy according to claim 8, characterized in that: A mounting circular groove is provided through the upper mold top plate (1) and the upper attachment plate (2) at the position corresponding to the convex mold (106), a nitrogen spring (102) is installed in the mounting circular groove, and the telescopic end of the nitrogen spring (102) is against the top surface of the pressurizing base (103).

10. A continuous stamping composite die structure for improving stamping accuracy according to claim 7, characterized in that: A limiting groove is provided on the side of one end of the draw plate (105) extending to the outside, and a limiting pad (107) is installed on the stripping plate (4), and the limiting pad (107) is inserted into the limiting groove.

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