Polar plate processing die

Abstract

The invention provides a polar plate processing mold. The polar plate processing die comprises an upper die and a lower die, the upper die comprises an upper die frame, an upper die core assembly, a first elastic structure and a punch, the upper die core assembly can move relative to the upper die frame, the first end of the punch is connected with the upper die frame, and the second end of the punch has a storage state located in the upper die core assembly and a punching state extending out of the upper die core assembly for punching; the lower die comprises a floating plate, a lower die frame, a lower die core and a second elastic structure, the lower die core is arranged on the lower die frame, and the floating plate is movably arranged relative to the lower die frame; the floating plate is provided with a first through hole, and at least part of the lower die core extends into the first through hole; the second elastic structure is used for applying second elastic force moving towards one side of the upper die to the floating plate; the elastic coefficient of the first elastic structure is larger than that of the second elastic structure. The problem that in the prior art, when product forming and punching are conducted on a metal pole plate at the same time, the punching precision is poor is solved.

Description

Technical Field

[0001] The invention relates to the technical field of pole plate processing moulds, and in particular to a pole plate processing mould. Background Art

[0002] At present, fuel cells (especially hydrogen fuel cells) are usually stacked with multiple single components (single cells) sandwiched by bipolar plates. The bipolar plate is the core component of the fuel cell stack, also known as the "skeleton" of the stack, which has the functions of distributing the reaction gas, supporting the membrane electrode, and collecting and guiding the water generated after the gas reaction. Specifically, according to the different substrate materials, the bipolar plate can be divided into graphite bipolar plates, metal bipolar plates and composite bipolar plates. As for the metal bipolar plate, it has the advantages of excellent mechanical strength, high conductivity, good air tightness, easy manufacturing and molding. Usually, the metal bipolar plate is composed of a cathode plate and an anode plate by welding. If there is a misalignment between the flow channel and the pores or the flow channel itself during the molding process of the cathode plate or the anode plate, when the bipolar plate is welded and assembled into a fuel cell, it will affect the flow of gas and water on the surface of the metal plate, and even cause the fuel cell performance to decrease or a safety hazard to occur.

[0003] In the prior art, the main process flow of metal plate forming includes blanking, forming, punching and trimming. Since the product precision tolerance of metal plates is small and only 0.01 to 0.1 mm, the product positioning accuracy between each process is required to be high. Among them, the positioning forms commonly used in production are: contour positioning, hole positioning, open feature positioning (including semicircular holes, U-shaped grooves, semi-square grooves), and combined positioning (contour positioning + hole positioning, contour positioning + open feature positioning, hole positioning + open feature positioning).

[0004] However, since the metal plate is made of ultra-thin metal sheets with a thickness of 0.07 to 0.12 mm, and the flow channel shape in the metal plate is relatively complex and the molding area is large, if the metal plate undergoes a large deformation during the molding process, it is easy to cause deformation of the holes, affecting the positioning accuracy of the subsequent processes. Summary of the invention

[0005] The main purpose of the present invention is to provide a plate processing mold to solve the problem of poor punching accuracy when metal plates are processed simultaneously during product forming and punching in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a plate processing mold, comprising: an upper mold, including an upper mold frame, an upper mold core assembly, a first elastic structure and a punch, the upper mold core assembly is movably arranged relative to the upper mold frame and is located below the upper mold frame, the first end of the punch is connected to the upper mold frame, and the second end of the punch has a storage state located in the upper mold core assembly and a punching state extending out of the upper mold core assembly for punching; a lower mold, including a floating plate, a lower mold frame, a lower mold core and a second elastic structure, the lower mold core is arranged on the lower mold frame, the floating plate is movably arranged relative to the lower mold frame and is located above the lower mold frame; the floating plate has a first through hole, at least part of the lower mold core extends into the first through hole; the second elastic structure is used to apply a second elastic force to the floating plate to move toward one side of the upper mold; wherein the first elastic structure is used to apply a first elastic force to the upper mold core assembly to move toward one side of the lower mold; when the plate processing mold is in an initial state, the upper surface of the floating plate is higher than the upper surface of the lower mold core; the elastic coefficient of the first elastic structure is greater than the elastic coefficient of the second elastic structure.

[0007] Furthermore, the upper mold core assembly includes: a first pad, the upper surface of the first pad is used to contact the first elastic force applying end of the first elastic structure; an upper mold core is connected to the first pad and is located below the first pad, and the lower surface of the upper mold core has a recess for cooperating with the electrode plate; wherein the first pad has a second through hole, and the punch is passed through the second through hole; the upper mold core has a third through hole connected to the second through hole, and when the punch is in a storage state, the second end of the punch is passed through the third through hole; when the punch is in a punching state, the second end of the punch extends out of the third through hole.

[0008] Furthermore, the upper mold also includes a first guide assembly, which includes: a first guide column, which is arranged on the upper mold frame; a first guide sleeve, which is arranged on the upper mold core, and the first guide sleeve is arranged outside the first guide column to slide along the extension direction of the first guide column; wherein the first pad has a fourth through hole, and the first guide column is inserted into the fourth through hole.

[0009] Furthermore, the upper mold also includes a first limiting structure, which includes: a first sleeve, which is inserted into the upper mold frame and connected to the upper mold frame; a first fastener, the head of the first fastener is used to limit the stop with the first sleeve, and the tail of the first fastener is threadedly connected to the upper mold frame or the first pad; wherein, the first limiting structure is one, or the first limiting structure is multiple, and the multiple first limiting structures are arranged at intervals along the length direction and / or width direction of the upper mold frame.

[0010] Furthermore, the first elastic structure is a nitrogen spring, the upper mold frame has a mounting hole, and the nitrogen spring is arranged in the mounting hole.

[0011] Further, the lower mold core and / or the lower mold frame has a punching waste through hole.

[0012] Furthermore, the lower mold frame includes a second pad, a lower mold base, a pad and a bottom plate connected in sequence from top to bottom, and the plate processing mold also includes a second guide assembly, and the second guide assembly also includes: a second guide column, which is arranged on the upper mold frame; a second guide sleeve, which is arranged on the lower mold base, and the second guide sleeve is arranged outside the second guide column to slide along the extension direction of the second guide column; wherein, there is one second guide assembly; or, there are multiple second guide assemblies, and multiple second guide assemblies are arranged at circumferential intervals around the lower mold core.

[0013] Furthermore, an installation space is formed between the floating plate and the second pad, and the second elastic structure is a spring. The spring is located in the installation space and two ends of the spring are respectively in contact with the floating plate and the second pad.

[0014] Furthermore, the lower mold also includes a second limiting structure, which includes: a second sleeve, which is inserted into the lower mold frame and connected to the lower mold frame; a second fastener, the head of the second fastener is used to limit the stop with the second sleeve, and the tail of the second fastener is threadedly connected to the floating plate or the lower mold frame; wherein, the second limiting structure is one, or the second limiting structure is multiple, and the multiple second limiting structures are arranged at intervals along the length direction and / or width direction of the lower mold frame.

[0015] Furthermore, the upper mold frame includes a top plate, a third pad and a clamping plate connected in sequence from top to bottom, the second guide column is arranged on the lower surface of the top plate, and the third pad and the clamping plate are located on one side of the second guide column.

[0016] According to the technical solution of the present invention, the plate processing mold includes an upper mold and a lower mold. The upper mold includes an upper mold frame, an upper mold core assembly, a first elastic structure and a punch. The upper mold core assembly is movably arranged relative to the upper mold frame and is located below the upper mold frame. The first end of the punch is connected to the upper mold frame, and the second end of the punch has a storage state located in the upper mold core assembly and a punching state extending out of the upper mold core assembly for punching. The first elastic structure is used to apply a first elastic force to the upper mold core assembly to move toward one side of the lower mold. The lower mold includes a floating plate, a lower mold frame, a lower mold core and a second elastic structure. The lower mold core is arranged on the lower mold frame. The floating plate is movably arranged relative to the lower mold frame and is located above the lower mold frame. The floating plate has a first through hole, and at least part of the lower mold core extends into the first through hole; the second elastic structure is used to apply a second elastic force to the floating plate to move toward one side of the upper mold. When the plate processing mold is in the initial state, the upper surface of the floating plate is higher than the upper surface of the lower mold core. In this way, before using the plate processing mold to process the metal sheet, the metal sheet is first placed on the floating plate, and then the press is connected to the upper mold to drive the upper mold to descend. At this time, the punch is in a storage state and the upper surface of the floating plate is higher than the upper surface of the lower mold core. As the press continues to move downward, the upper mold core assembly first contacts the floating plate. Since the elastic coefficient of the first elastic structure is greater than the elastic coefficient of the second elastic structure, the first elastic force received by the upper mold core assembly is greater than the second elastic force received by the floating plate, and the floating plate continues to move downward with the upper mold. When the travel distance of the floating plate is moved, the upper mold core assembly fits the lower mold core and the floating plate stops moving downward. The press continues to apply pressure, and the metal sheet between the upper and lower molds is gradually formed under the action of pressure. At this time, the sheet is preformed. When the pressure applied by the press is greater than the sum of the first elastic force and the second elastic force, the upper mold core assembly continues to move downward. When the upper die core assembly is compressed a certain distance, the punch switches from the storage state to the punching state to punch the metal sheet. At this time, since the metal sheet has been formed, the metal sheet between the upper and lower dies will no longer change. After the positioning hole is punched, it will not deform due to the deformation of the sheet, which will make it difficult for the subsequent mold to achieve precise positioning. This solves the problem of poor punching accuracy of metal plates when the product is formed and punched at the same time in the prior art, and improves the punching accuracy. After that, the press continues to apply pressure and move downward until the upper die core assembly fits with the upper die frame. At this time, all components of the plate processing mold are fully fitted, and the press reaches the process required pressure and the lowest point of the press. As the press moves upward, the various parts of the plate processing mold work in the opposite state to the downward movement of the press, so that the various active parts of the plate processing mold are released in sequence, and finally the upper and lower molds are separated, and the press returns to the uppermost point. At this time, a complete working stroke is completed and the finished product can be taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a plate processing mold according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 Cross-sectional view of the plate processing mold.

[0020] The above drawings include the following reference numerals:

[0021] 10. Upper mold frame; 11. Top plate; 12. Third pad; 13. Clamp;

[0022] 20. upper mold core assembly; 21. first pad; 211. second through hole; 22. upper mold core; 221. third through hole;

[0023] 30. A first elastic structure;

[0024] 40. Punch;

[0025] 50. Floating plate;

[0026] 60. lower die frame; 61. second pad; 62. lower die base; 63. pad; 64. bottom plate; 65. installation space;

[0027] 70. Lower mold core;

[0028] 80. A second elastic structure;

[0029] 90. first limiting structure; 91. first sleeve; 92. first fastener;

[0030] 100. Punching waste through holes;

[0031] 110, second guide assembly; 111, second guide column; 112, second guide sleeve;

[0032] 120. A second limiting structure; 121. A second sleeve; 122. A second fastener. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0035] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0036] In order to solve the problem of poor punching accuracy of metal plates when product forming and punching are processed simultaneously in the prior art, the present application provides a plate processing mold.

[0037] like Figure 1 and Figure 2 As shown, the plate processing mold includes an upper mold and a lower mold. The upper mold includes an upper mold frame 10, an upper mold core assembly 20, a first elastic structure 30 and a punch 40. The upper mold core assembly 20 is movably arranged relative to the upper mold frame 10 and is located below the upper mold frame 10. The first end of the punch 40 is connected to the upper mold frame 10, and the second end of the punch 40 has a storage state located in the upper mold core assembly 20 and a punching state extending out of the upper mold core assembly 20 for punching. The lower mold includes a floating plate 50, a lower mold frame 60, a lower mold core 70 and a second elastic structure 80. The lower mold core 70 is arranged on the lower mold frame 60. The floating plate 50 is movably arranged relative to the lower mold frame 60 and is located above the lower mold frame 60. The floating plate 50 has a first through hole, and at least part of the lower mold core 70 extends into the first through hole; the second elastic structure 80 is used to apply a second elastic force to the floating plate 50 to move toward one side of the upper mold. Among them, the first elastic structure 30 is used to apply a first elastic force to the upper mold core assembly 20 to move toward one side of the lower mold; when the electrode plate processing mold is in the initial state, the upper surface of the floating plate 50 is higher than the upper surface of the lower mold core 70; the elastic coefficient of the first elastic structure 30 is greater than the elastic coefficient of the second elastic structure 80.

[0038] According to the technical solution of this embodiment, before using the plate processing mold to process the metal sheet, the metal sheet is first placed on the floating plate 50, and then the press is connected to the upper mold to drive the upper mold to descend. At this time, the punch 40 is in a storage state and the upper surface of the floating plate 50 is higher than the upper surface of the lower mold core 70. As the press continues to move downward, the upper mold core assembly 20 first contacts the floating plate 50. Since the elastic coefficient of the first elastic structure 30 is greater than the elastic coefficient of the second elastic structure 80, the first elastic force received by the upper mold core assembly 20 is greater than the second elastic force received by the floating plate 50, and the floating plate 50 continues to move downward with the upper mold. When the travel distance of the floating plate 50 is moved, the upper mold core assembly 20 is fitted with the lower mold core 70, and the floating plate 50 stops moving downward. The press continues to apply pressure, and the metal sheet between the upper and lower molds is gradually formed under the action of pressure. At this time, the sheet is preformed. When the pressure applied by the press is greater than the sum of the first elastic force and the second elastic force, the upper mold core assembly 20 continues to move downward. When the upper mold core assembly 20 is compressed a certain distance, the punch 40 switches from the storage state to the punching state to punch the metal sheet. At this time, since the metal sheet has been formed, the metal sheet between the upper and lower molds will no longer change. After the positioning hole is punched, it will not deform due to the deformation of the sheet, which will make it difficult for the subsequent mold to achieve precise positioning. This solves the problem of poor punching accuracy of metal plates when the product is formed and punched at the same time in the prior art, and improves the punching accuracy. Afterwards, the press continues to apply pressure and move downward until the upper mold core assembly 20 fits with the upper mold frame 10. At this time, all components of the plate processing mold are fully fitted, and the press reaches the process required pressure and the lowest point of the press. As the press moves upward, the various parts of the plate processing mold work in the opposite state to when the press moves downward, so that the various active parts of the plate processing mold are released in sequence, and finally the upper and lower molds are separated, and the press returns to the uppermost point. At this time, a complete working stroke is completed and the finished product can be taken out

[0039] In this embodiment, the plate processing mold not only has high plate forming accuracy, but also has high punching accuracy, which can meet the needs of large-scale automated production. At the same time, the plate processing mold is simple to assemble, easy to maintain, stable in structure, and easy to debug, which meets the needs of automated production.

[0040] In this embodiment, the processing method using the plate processing mold can minimize the deformation effect of product molding on the positioning hole, and minimize the influence of product deformation on the positioning of the subsequent process, effectively improving the positioning accuracy of the whole process of metal plate processing. At the same time, the above processing method solves many defects in the existing design, such as the problem that the molding area cannot be completely fitted and compacted when the mold is closed, the problem of cylinder stability, and the problem that the punch may collide with the punching die, which simplifies the structure of the plate processing mold, makes product molding and punching stable, and greatly promotes the diversity of metal plate processing methods and promotes the development of fuel cell metal plates.

[0041] like Figure 2 As shown, the upper mold core assembly 20 includes a first pad 21 and an upper mold core 22, and the upper surface of the first pad 21 is used to contact the first elastic force applying end of the first elastic structure 30. The upper mold core 22 is connected to the first pad 21 and is located below the first pad 21, and the lower surface of the upper mold core 22 has a recess for matching with the electrode plate. Among them, the first pad 21 has a second through hole 211, and the punch 40 is inserted into the second through hole 211. The upper mold core 22 has a third through hole 221 connected to the second through hole 211. When the punch 40 is in the storage state, the second end of the punch 40 is inserted into the third through hole 221; when the punch 40 is in the punching state, the second end of the punch 40 extends out of the third through hole 221. In this way, the above arrangement not only ensures the stable movement of the punch 40, but also improves the accuracy and efficiency of punching. At the same time, the above arrangement makes the structure of the upper mold core assembly 20 simpler and easier to implement, thereby reducing the processing cost and difficulty of the upper mold core assembly 20.

[0042] Specifically, the design of the upper mold core assembly 20 enables the punch 40 to be accurately aligned with the plate when punching, reducing punching deviation. At the same time, the layered structure of the first pad 21 and the upper mold core 22 facilitates the maintenance of the upper mold and the replacement of the punch, which not only improves production flexibility, but also reduces maintenance costs and improves economic benefits.

[0043] In this embodiment, the upper mold further includes a first guide assembly, which includes a first guide column and a first guide sleeve. The first guide column is arranged on the upper mold frame 10, and the first guide sleeve is arranged on the upper mold core 22. The first guide sleeve is sleeved outside the first guide column to slide along the extension direction of the first guide column. Among them, the first pad 21 has a fourth through hole, and the first guide column is inserted into the fourth through hole. In this way, the above-mentioned setting of the first guide assembly ensures the precise guidance of the upper mold core 22 during the movement process, and avoids the mold dislocation during the stamping process.

[0044] In this embodiment, the use of the first guide assembly greatly improves the accuracy and stability of the upper mold, reduces the defective rate caused by mold misalignment, and ensures that each hole position of the plate is accurate, thereby improving the performance and safety of the battery.

[0045] like Figure 2 As shown, the upper mold also includes a first limiting structure 90, and the first limiting structure 90 includes a first sleeve 91 and a first fastener 92. Among them, the first sleeve 91 is inserted into the upper mold frame 10 and connected to the upper mold frame 10. The head of the first fastener 92 is used to limit the stop with the first sleeve 91, and the tail of the first fastener 92 is threadedly connected to the upper mold frame 10 or the first pad 21. In this way, the above-mentioned setting of the first limiting structure 90 not only further improves the stability and processing accuracy of the upper mold, but also plays a role in connecting the upper mold frame 10 and the upper mold core assembly 20 to ensure that the two can move relative to each other. At the same time, the above-mentioned setting makes the connection position of the first fastener 92 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0046] In this embodiment, the tail of the first fastener 92 is threadedly connected to the first pad 21. In this way, the first limiting structure 90 not only strengthens the overall stability of the upper mold, but also ensures the consistency of the mold size during the punching process, greatly reduces the problem of unstable product quality caused by mold size fluctuations, and improves production efficiency and product consistency.

[0047] Optionally, the first fastener 92 is a bolt.

[0048] Optionally, there is one first limiting structure 90, or there are multiple first limiting structures 90, and the multiple first limiting structures 90 are arranged at intervals along the length direction and / or width direction of the upper mold frame 10. In this way, the above arrangement makes the number of the first limiting structures 90 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0049] In this embodiment, there are four first limiting structures 90 , and the four first limiting structures 90 are arranged at intervals along the length direction of the upper mold frame 10 .

[0050] It should be noted that the number of the first limiting structures 90 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the first limiting structures 90 is two, three, five, six, or more.

[0051] In this embodiment, the first elastic structure 30 is a nitrogen spring, the upper mold frame 10 has a mounting hole, and the nitrogen spring is arranged in the mounting hole. In this way, the use of the nitrogen spring not only provides a stable elastic force, but also reduces rebound, thereby improving the punching accuracy and the service life of the mold.

[0052] Specifically, nitrogen springs are an ideal choice for large-scale battery plate production due to their stable performance and long life. They can withstand long-term, high-frequency stamping operations, reduce the maintenance frequency of molds, and improve production efficiency. This high-performance elastic structure is of great significance for ensuring punching accuracy and extending the service life of molds.

[0053] Optionally, the lower die core 70 and / or the lower die frame 60 has a punching waste through hole 100. In this way, the above-mentioned arrangement of the punching waste through hole 100 allows the waste generated by punching to be discharged smoothly, avoiding the waste from clogging the die and improving the processing efficiency. At the same time, the above-mentioned arrangement makes the arrangement position of the punching waste through hole 100 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0054] In this embodiment, both the lower die core 70 and the lower die frame 60 have a punching waste through hole 100. Thus, the above arrangement greatly improves the waste discharge efficiency, avoids mold wear and production stoppage caused by waste blockage, reduces downtime in the production process, and further improves the punching efficiency.

[0055] like Figure 2 As shown, the lower die frame 60 includes a second pad 61, a lower die seat 62, a pad 63 and a bottom plate 64 connected in sequence from top to bottom, and the plate processing die also includes a second guide assembly 110, and the second guide assembly 110 also includes a second guide column 111 and a second guide sleeve 112. Among them, the second guide column 111 is arranged on the upper die frame 10. The second guide sleeve 112 is arranged on the lower die seat 62, and the second guide sleeve 112 is sleeved outside the second guide column 111 to slide along the extension direction of the second guide column 111. In this way, the above-mentioned arrangement of the second guide assembly 110 ensures the stability and accuracy of the die during the stamping process.

[0056] In this embodiment, the use of the second guide assembly 110 greatly improves the accuracy and stability of the upper mold, reduces the defective rate caused by mold misalignment, and ensures that each hole position of the plate is accurate, thereby improving the performance and safety of the battery. Among them, the pad 63 is used to adjust the mold height and support the mold forming area, and the bottom plate 64 is used to connect with the lower workbench of the press.

[0057] Optionally, there is one second guide assembly 110; or, there are multiple second guide assemblies 110, and the multiple second guide assemblies 110 are arranged at intervals around the circumference of the lower mold core 70. In this way, the above arrangement makes the number of second guide assemblies 110 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0058] In this embodiment, there are two second guide assemblies 110 , and the two second guide assemblies 110 are arranged at intervals in the circumferential direction around the lower mold core 70 .

[0059] It should be noted that the number of the second guide assemblies 110 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the second guide assemblies 110 is three, four, five, six, or more.

[0060] like Figure 2 As shown, an installation space 65 is formed between the floating plate 50 and the second pad 61, and the second elastic structure 80 is a spring, which is located in the installation space 65 and has two ends respectively abutting against the floating plate 50 and the second pad 61. In this way, the above arrangement not only simplifies the mold structure, but also facilitates the replacement and maintenance of the second elastic structure 80, and also makes the internal space layout of the lower mold more reasonable and compact, thereby improving the utilization rate of the internal space.

[0061] like Figure 2 As shown, the lower mold also includes a second limiting structure 120, and the second limiting structure 120 includes a second sleeve 121 and a second fastener 122. The second sleeve 121 is inserted into the lower mold frame 60 and connected to the lower mold frame 60. The head of the second fastener 122 is used to limit the stop with the second sleeve 121, and the tail of the second fastener 122 is threadedly connected to the floating plate 50 or the lower mold frame 60. In this way, the above-mentioned setting of the second limiting structure 120 not only further improves the stability and processing accuracy of the lower mold, but also plays a role in connecting the lower mold frame 60 and the floating plate 50 to ensure that the two can move relative to each other. At the same time, the above-mentioned setting makes the connection position of the second fastener 122 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0062] In this embodiment, the tail of the second fastener 122 is threadedly connected to the floating plate 50. In this way, the second limiting structure 120 not only strengthens the overall stability of the upper mold, but also ensures the consistency of the mold size during the punching process, greatly reduces the problem of unstable product quality caused by mold size fluctuations, and improves production efficiency and product consistency.

[0063] Optionally, the second fastener 122 is a bolt or a screw.

[0064] Optionally, there is one second limiting structure 120, or there are multiple second limiting structures 120, and the multiple second limiting structures 120 are arranged at intervals along the length direction and / or width direction of the lower mold frame 60. In this way, the above arrangement makes the number of the second limiting structures 120 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0065] In this embodiment, there are two second limiting structures 120 , and the two first limiting structures 90 are arranged at intervals along the length direction of the lower mold frame 60 .

[0066] It should be noted that the number of the second limiting structures 120 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the second limiting structures 120 is three, four, five, six, or more.

[0067] like Figure 2 As shown, the upper mold frame 10 includes a top plate 11, a third pad 12 and a clamping plate 13 connected in sequence from top to bottom, a second guide column 111 is arranged on the lower surface of the top plate 11, and the third pad 12 and the clamping plate 13 are located on one side of the second guide column 111. In this way, the above-mentioned layered design not only improves the strength and stability of the upper mold, but also facilitates the disassembly and maintenance of the upper mold. At the same time, the above-mentioned arrangement makes the structure of the upper mold frame 10 simpler, easier to process and realize, and reduces the processing cost and difficulty of the upper mold frame 10.

[0068] In this embodiment, the above-mentioned layered design of the upper mold frame 10 not only improves the overall strength and stability of the upper mold, but also facilitates rapid disassembly and maintenance during the production process, reduces production failures and downtime caused by environmental factors, and has an important impact on improving production efficiency and product quality to ensure the consistency and accuracy of the plate punching process. Among them, the third pad 12 is used to adjust the overall height of the upper mold, and a first through hole of the nitrogen spring is processed thereon, and a second through hole of the nitrogen spring is processed thereon.

[0069] Specifically, the top plate 11, the third pad 12 and the clamping plate 13 are fixedly connected by bolts. A nitrogen spring is installed on the lower side of the top plate 11. The specific specifications and models of the nitrogen spring are selected during the mold design stage according to the pressure required for molding the product. The working end of the nitrogen spring directly contacts the upper surface of the upper mold core 22, and the stroke length of the nitrogen spring is selected in coordination with the length of the limiting fastener.

[0070] In this embodiment, the lower surface of the upper mold core 22 is processed with a groove having a product shape.

[0071] In this embodiment, the lower mold core 70, the second pad 61, the lower mold base 62, the pad 63 and the bottom plate 64 are fixed by bolts. The upper surface of the lower mold core 70 is processed with a convex feature corresponding to the groove shape of the lower surface of the upper mold core 22.

[0072] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0073] The plate processing mold includes an upper mold and a lower mold. The upper mold includes an upper mold frame, an upper mold core assembly, a first elastic structure and a punch. The upper mold core assembly is movably arranged relative to the upper mold frame and is located below the upper mold frame. The first end of the punch is connected to the upper mold frame, and the second end of the punch has a storage state located in the upper mold core assembly and a punching state extending out of the upper mold core assembly for punching. The first elastic structure is used to apply a first elastic force to the upper mold core assembly to move toward one side of the lower mold. The lower mold includes a floating plate, a lower mold frame, a lower mold core and a second elastic structure. The lower mold core is arranged on the lower mold frame. The floating plate is movably arranged relative to the lower mold frame and is located above the lower mold frame. The floating plate has a first through hole, and at least part of the lower mold core extends into the first through hole; the second elastic structure is used to apply a second elastic force to the floating plate to move toward one side of the upper mold. Wherein, when the plate processing mold is in the initial state, the upper surface of the floating plate is higher than the upper surface of the lower mold core. In this way, before using the plate processing mold to process the metal sheet, the metal sheet is first placed on the floating plate, and then the press is connected to the upper mold to drive the upper mold to descend. At this time, the punch is in a storage state and the upper surface of the floating plate is higher than the upper surface of the lower mold core. As the press continues to move downward, the upper mold core assembly first contacts the floating plate. Since the elastic coefficient of the first elastic structure is greater than the elastic coefficient of the second elastic structure, the first elastic force received by the upper mold core assembly is greater than the second elastic force received by the floating plate, and the floating plate continues to move downward with the upper mold. When the travel distance of the floating plate is moved, the upper mold core assembly fits the lower mold core and the floating plate stops moving downward. The press continues to apply pressure, and the metal sheet between the upper and lower molds is gradually formed under the action of pressure. At this time, the sheet is preformed. When the pressure applied by the press is greater than the sum of the first elastic force and the second elastic force, the upper mold core assembly continues to move downward. When the upper die core assembly is compressed a certain distance, the punch switches from the storage state to the punching state to punch the metal sheet. At this time, since the metal sheet has been formed, the metal sheet between the upper and lower dies will no longer change. After the positioning hole is punched, it will not deform due to the deformation of the sheet, which will make it difficult for the subsequent mold to achieve precise positioning. This solves the problem of poor punching accuracy of metal plates when the product is formed and punched at the same time in the prior art, and improves the punching accuracy. After that, the press continues to apply pressure and move downward until the upper die core assembly fits with the upper die frame. At this time, all components of the plate processing mold are fully fitted, and the press reaches the process required pressure and the lowest point of the press. As the press moves upward, the various parts of the plate processing mold work in the opposite state to the downward movement of the press, so that the various active parts of the plate processing mold are released in sequence, and finally the upper and lower molds are separated, and the press returns to the uppermost point. At this time, a complete working stroke is completed and the finished product can be taken out.

[0074] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0075] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0076] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plate processing mold, characterized in that: include: An upper mold comprises an upper mold frame (10), an upper mold core assembly (20), a first elastic structure (30) and a punch (40), wherein the upper mold core assembly (20) is movably arranged relative to the upper mold frame (10) and is located below the upper mold frame (10), a first end of the punch (40) is connected to the upper mold frame (10), and a second end of the punch (40) has a storage state in which it is located in the upper mold core assembly (20) and a punching state in which it extends out of the upper mold core assembly (20) for punching; A lower mold comprises a floating plate (50), a lower mold frame (60), a lower mold core (70) and a second elastic structure (80); the lower mold core (70) is arranged on the lower mold frame (60); the floating plate (50) is movably arranged relative to the lower mold frame (60) and is located above the lower mold frame (60); the floating plate (50) has a first through hole, and at least a part of the lower mold core (70) extends into the first through hole; the second elastic structure (80) is used to apply a second elastic force to the floating plate (50) to move toward one side of the upper mold; The first elastic structure (30) is used to apply a first elastic force to the upper mold core assembly (20) to move toward one side of the lower mold; when the electrode plate processing mold is in an initial state, the upper surface of the floating plate (50) is higher than the upper surface of the lower mold core (70); and the elastic coefficient of the first elastic structure (30) is greater than the elastic coefficient of the second elastic structure (80).

2. The plate processing mold according to claim 1, characterized in that: The upper mold core assembly (20) comprises: a first pad (21), the upper surface of the first pad (21) being used for contacting the first elastic force applying end of the first elastic structure (30); An upper mold core (22) connected to the first pad (21) and located below the first pad (21), wherein the lower surface of the upper mold core (22) has a recess for matching with the electrode plate; Wherein, the first pad (21) has a second through hole (211), and the punch (40) is inserted into the second through hole (211); the upper mold core (22) has a third through hole (221) connected to the second through hole (211), and when the punch (40) is in the storage state, the second end of the punch (40) is inserted into the third through hole (221); when the punch (40) is in the punching state, the second end of the punch (40) extends out of the third through hole (221).

3. The plate processing mold according to claim 2, characterized in that: The upper mold further includes a first guide assembly, wherein the first guide assembly includes: A first guide column, arranged on the upper mold frame (10); A first guide sleeve is arranged on the upper mold core (22), wherein the first guide sleeve is arranged outside the first guide column to slide along the extension direction of the first guide column; Wherein, the first pad (21) has a fourth through hole, and the first guide column is inserted into the fourth through hole.

4. The plate processing mold according to claim 2, characterized in that: The upper mold further comprises a first limiting structure (90), wherein the first limiting structure (90) comprises: A first sleeve (91) is inserted into the upper mold frame (10) and connected to the upper mold frame (10); A first fastener (92), wherein the head of the first fastener (92) is used for limiting and stopping the first sleeve (91), and the tail of the first fastener (92) is threadedly connected to the upper mold frame (10) or the first pad (21); There is one first limiting structure (90), or there are multiple first limiting structures (90), and the multiple first limiting structures (90) are arranged at intervals along the length direction and / or width direction of the upper mold frame (10).

5. The plate processing mold according to claim 1, characterized in that: The first elastic structure (30) is a nitrogen spring, the upper mold frame (10) has a mounting hole, and the nitrogen spring is arranged in the mounting hole.

6. The plate processing mold according to claim 1, characterized in that: The lower mold core (70) and / or the lower mold frame (60) has a punching waste through hole (100).

7. The plate processing mold according to claim 1, characterized in that: The lower mold frame (60) comprises a second pad (61), a lower mold base (62), a pad (63) and a bottom plate (64) which are sequentially connected from top to bottom. The electrode plate processing mold further comprises a second guide assembly (110). The second guide assembly (110) further comprises: A second guide column (111) is arranged on the upper mold frame (10); A second guide sleeve (112) is arranged on the lower die base (62), and the second guide sleeve (112) is sleeved outside the second guide column (111) to slide along the extension direction of the second guide column (111); There is one second guide assembly (110); or, there are multiple second guide assemblies (110), and the multiple second guide assemblies (110) are arranged at intervals around the circumference of the lower mold core (70).

8. The plate processing mold according to claim 7, characterized in that: An installation space (65) is formed between the floating plate (50) and the second pad (61); the second elastic structure (80) is a spring, which is located in the installation space (65) and has two ends respectively abutting against the floating plate (50) and the second pad (61).

9. The plate processing mold according to claim 1, characterized in that: The lower mold further comprises a second limiting structure (120), wherein the second limiting structure (120) comprises: A second sleeve (121) is inserted into the lower mold frame (60) and connected to the lower mold frame (60); a second fastener (122), wherein the head of the second fastener (122) is used for limiting and stopping the second sleeve (121), and the tail of the second fastener (122) is threadedly connected to the floating plate (50) or the lower mold frame (60); There is one second limiting structure (120), or there are multiple second limiting structures (120), and the multiple second limiting structures (120) are arranged at intervals along the length direction and / or width direction of the lower mold frame (60).

10. The electrode plate processing mold according to claim 7, characterized in that: The upper mold frame (10) comprises a top plate (11), a third pad (12) and a clamping plate (13) which are connected in sequence from top to bottom, the second guide column (111) is arranged on the lower surface of the top plate (11), and the third pad (12) and the clamping plate (13) are located on one side of the second guide column (111).

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