Lower die for stamping polar plate and stamping die assembly with lower die
By designing a lower mold for stamping plates, pre-flattening the material by using its height changes in the initial and drawn states, the problem of low plate processing accuracy is solved, and higher processing accuracy and better processing Low warpage.
Patent Information
- Application Number
- CN202421345919.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-13
AI Technical Summary
In the prior art, due to the stamping mold structure during the production of the electrode plate, the material is not completely pressed or flattened, resulting in low processing accuracy and the plane warpage is likely to exceed the allowable error range.
Design a lower mold for stamping a pole plate, including a pad plate, a pressing plate, an elastic member and a molding punch. When the lower mold changes from the initial state to a drawing state, the plate forming surface changes from lower than the pressing surface. To be higher than the pressing surface, the material is pre-flattened to ensure that the material and the plate forming surface are fully fitted.
Through the design of the lower mold, the material is fully fitted with the plate forming surface, which significantly improves the processing accuracy of the plate and reduces the error range of plane warpage.
Smart Images
Figure CN222519675U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cells, in particular to a lower die for punching a polar plate and a punching die assembly having the lower die. Background Art
[0002] In the related art, the pole plates are usually manufactured by means of drawing and stamping using a stamping die. During the manufacturing of the pole plates, the material used to form the pole plates is not completely compressed or flattened after being pressed by the stamping die due to the structure of the stamping die, resulting in a certain degree of warping of the material before forming. The plane warping of the processed pole plates is likely to exceed the allowable error range, and the processing accuracy of the pole plates is low. Utility Model Content
[0003] The utility model aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the utility model proposes a lower die for punching a plate, which is conducive to improving the processing accuracy of the plate.
[0004] The utility model also provides a stamping die assembly having the lower die.
[0005] According to the embodiment of the utility model, the lower mold for stamping the plate includes: a pad, a pressure plate, an elastic member and a forming punch, the elastic member is connected between the pressure plate and the pad, the pressure plate has an avoidance through hole, the forming punch is passed through the avoidance through hole and is fixedly connected to the pad; wherein the forming punch has a pole plate forming surface on the side away from the pad, the pressure plate has a pressure surface on the side away from the pad, and the lower mold has an initial state and a drawing state; in the initial state, the pole plate forming surface is lower than the pressure surface in the height direction of the lower mold; in the drawing state, the pole plate forming surface is higher than the pressure surface in the height direction of the lower mold.
[0006] According to the lower mold for stamping the pole plate in the embodiment of the utility model, when the lower mold changes from the initial state to the drawing state, in the height direction of the lower mold, the pole plate forming surface changes from being lower than the pressing surface to being higher than the pressing surface, so as to pre-flatten the material used to form the pole plate, which is beneficial for the material to fully fit with the pole plate forming surface, thereby facilitating the improvement of the processing accuracy of the pole plate.
[0007] According to some embodiments of the utility model, the lower mold further includes a guide member, and the guide member is fixedly connected to the pressure plate, and in the height direction of the lower mold, the guide member cooperates with the pad guide.
[0008] According to some embodiments of the utility model, the pad has a guide through hole, and the guide member includes: a guide rod and a limit head, the guide rod is inserted into the guide through hole, one end of the guide rod is fixedly connected to the pressure plate, and the other end of the guide rod is fixedly connected to the limit head, and the outer diameter of the limit head is larger than the inner diameter of the guide through hole.
[0009] According to some embodiments of the present invention, in the initial state, the limit head abuts against the end surface of the backing plate on the side facing away from the pressing plate.
[0010] According to some embodiments of the present invention, there are multiple elastic members and / or guide members.
[0011] According to some embodiments of the present utility model, the lower mold further includes a lower mold base, and the pad is fixedly connected to the lower mold base.
[0012] According to some embodiments of the present utility model, the pressing surface has a flow-blocking rib forming groove, and the flow-blocking rib forming groove is arranged around the outer side of the forming punch.
[0013] According to some embodiments of the present invention, the forming punch has an exhaust hole, one end of the exhaust hole is located on the electrode plate forming surface, and the other end of the exhaust hole is connected to the atmosphere.
[0014] According to some embodiments of the present invention, there are multiple exhaust holes.
[0015] According to another embodiment of the utility model, a stamping die assembly for stamping a plate includes: a lower die and an upper die, wherein the lower die is the above-mentioned lower die for stamping a plate; and the upper die is liftably disposed above the lower die.
[0016] According to the stamping die assembly for stamping pole plates in the embodiment of the utility model, when the lower die changes from the initial state to the drawing state, the pole plate forming surface changes from being lower than the pressing surface to being higher than the pressing surface in the height direction of the lower die, so as to pre-flatten the material used to form the pole plate, which is beneficial for the material to fully fit with the pole plate forming surface, thereby facilitating the improvement of the processing accuracy of the pole plate.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a three-dimensional diagram of a lower mold according to an embodiment of the utility model;
[0019] Figure 2 is a cross-sectional view of a lower mold according to an embodiment of the utility model;
[0020] Figure 3 yes Figure 2 A magnified view at point A;
[0021] Figure 4 It is a schematic diagram of the electrode plate forming surface according to an embodiment of the utility model.
[0022] Reference numerals:
[0023] Pad 1; connecting hole 11; pressing plate 2; avoidance through hole 21; pressing surface 22; baffle rib forming groove 221; elastic member 3; forming punch 4; plate forming surface 41; exhaust hole 42; flow channel forming groove 43; guide member 5; guide rod 51; limit head 52; sleeve 6; guide part 61; guide through hole 611; flange part 62; lower die seat 7; die frame 71; cushion block 72; support plate 73; guide column 74; lower die 10. DETAILED DESCRIPTION
[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0025] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. 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 utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] Combine the following Figure 1-Figure 4 The lower die 10 for punching a plate and the punching die assembly having the lower die 10 according to the embodiment of the present invention are described in detail.
[0029] Reference Figure 1-Figure 3 As shown, according to the embodiment of the utility model, the lower mold 10 for stamping the plate includes: a backing plate 1, a pressing plate 2, an elastic member 3 and a forming punch 4, the elastic member 3 is connected between the pressing plate 2 and the backing plate 1, the pressing plate 2 has an avoidance through hole 21, the forming punch 4 is penetrated through the avoidance through hole 21 and is fixedly connected to the backing plate 1, wherein the side of the forming punch 4 away from the backing plate 1 has a plate forming surface 41, the side of the pressing plate 2 away from the backing plate 1 has a pressing surface 22, the lower mold 10 has an initial state and a drawing state, in the initial state, the plate forming surface 41 is in the height direction of the lower mold 10 ( Figure 1-Figure 3 In the drawing state, the plate forming surface 41 is higher than the pressing surface 22 in the height direction of the lower mold 10, wherein the elastic member 3 can be a spring, and when the lower mold 10 is in the drawing state, the height difference between the plate forming surface 41 and the pressing surface 22 can be 5 to 10 mm.
[0030] It can be understood that before the electrode plate is processed, the lower mold 10 is in the initial state, and the elastic force of the elastic member 3 can lift the pressing plate 2 so that the pressing surface 22 of the pressing plate 2 is higher than the electrode plate forming surface 41 of the forming punch 4. When the electrode plate is processed, the material for forming the electrode plate can be placed on the pressing surface 22 of the pressing plate 2. At this time, the material is separated from the forming punch 4, and then the upper mold (not shown in the figure) used to stamp the electrode plate can be pressed downward against the material on the pressing surface 22. The upper mold and the pressing surface 22 can clamp the material together. The pressure applied by the upper mold to the material can be transmitted to the elastic member 3 through the pressing plate 2 to compress the elastic member 3, and the material and the pressing plate 2 move downward as a whole. When the material contacts the electrode plate forming surface 41 of the forming punch 4 After that, the upper mold continues to apply pressure to the material, and the forming punch 4 can support the part of the material corresponding to the plate forming surface 41, and the part of the material corresponding to the pressing surface 22 continues to move downward under the pressure applied by the upper mold, so that the material is pre-flattened in the area corresponding to the plate forming surface 41, which is conducive to the material and the plate forming surface 41 fully fitting, and then, the lower mold 10 can press against the material in the area corresponding to the plate forming surface 41, and the lower mold 10 is in a drawn state, and the material is drawn into a convex structure with a high middle and low surroundings, and the part of the material corresponding to the plate forming surface 41 is drawn into a plate structure, and the material and the plate forming surface 41 fully fit can effectively improve the flatness of the formed plate, thereby helping to improve the processing accuracy of the plate. Among them, the material can be a metal sheet.
[0031] According to the lower die 10 for stamping the pole plate in the embodiment of the utility model, when the lower die 10 changes from the initial state to the drawing state, in the height direction of the lower die 10, the pole plate forming surface 41 changes from being lower than the pressing surface 22 to being higher than the pressing surface 22, so as to pre-flatten the material used to form the pole plate, which is beneficial for the material to fully fit with the pole plate forming surface 41, thereby facilitating the improvement of the processing accuracy of the pole plate.
[0032] In some embodiments of the present invention, referring to Figure 1-Figure 3 As shown, the lower mold 10 also includes a guide member 5, which is fixedly connected to the pressing plate 2. In the height direction of the lower mold 10, the guide member 5 cooperates with the pad 1 to guide the pressing plate 2 so that the pressing plate 2 can move in the up and down directions, thereby avoiding the pressing plate 2 from tilting in the up and down directions, thereby avoiding the material on the pressing surface 22 from tilting, which is beneficial to further improve the processing accuracy of the plate.
[0033] In some embodiments of the utility model, the pad 1 has a guide through hole, and the guide member 5 includes: a guide rod 51 and a limit head 52. The guide rod 51 is inserted into the guide through hole, and one end of the guide rod 51 is fixedly connected to the pressure plate 2, and the other end of the guide rod 51 is fixedly connected to the limit head 52. The outer diameter of the limit head 52 is larger than the inner diameter of the guide through hole to prevent the guide rod 51 from detaching from the guide through hole and ensure the guiding cooperation between the guide rod 51 and the guide through hole, wherein the guide member 5 can be a screw, and the guide member 5 can be threadedly connected to the pressure plate 2.
[0034] In some embodiments of the present invention, in the initial state, the limit head 52 abuts against the end surface of the pad 1 away from the pressure plate 2 to prevent the guide rod 51 from escaping from the guide through hole and maintain the guiding fit between the guide rod 51 and the guide through hole.
[0035] It can be understood that when the lower mold 10 is in the initial state, the elastic member 3 between the pressing plate 2 and the pad 1 can apply an elastic force to the pressing plate 2 away from the pad 1, and the pressing plate 2 and the fixedly connected guide member 5 have a tendency to move away from the pad 1 as a whole, and the limit head 52 of the guide member 5 can maintain contact with the end face of the pad 1 away from the pressing plate 2 to prevent the guide rod 51 from disengaging from the guide through hole and maintain the guiding cooperation between the guide rod 51 and the guide through hole.
[0036] In other embodiments of the present invention, referring to Figure 1-Figure 3 As shown, the pad 1 has a connecting hole 11, and the inner side wall of the connecting hole can be fixedly connected with a sleeve 6. The sleeve 6 may include a guide portion 61 and a flange portion 62 that are fixedly connected, wherein the guide portion 61 is fixedly connected to the inner side wall of the connecting hole, and the flange portion 62 abuts against the end surface of the pad 1 away from the pressure plate 2. The guide portion 61 has a guide hole 611, and the guide rod 51 of the guide member 5 is inserted into the guide hole 611. In the initial state, the limit head 52 of the guide member 5 abuts against the flange portion 62.
[0037] In some embodiments of the present invention, there are multiple elastic members 3 and / or guide members 5, which is beneficial to improving the stability and reliability of the movement of the pressing plate 2.
[0038] In some embodiments, there are multiple elastic members 3, and the multiple elastic members 3 can apply elastic force to the pressing plate 2 at different positions, which is beneficial for uniform force on the pressing plate 2 and avoids the pressing plate 2 from tilting due to uneven force, thereby helping to improve the stability and reliability of the movement of the pressing plate 2.
[0039] In other embodiments, there are multiple guide members 5, and the pad 1 may have guide through holes corresponding to the multiple guide members 5 one by one. The multiple guide members 5 and the multiple corresponding guide through holes may form multiple groups of guide cooperation, so that the pressing plate 2 can move in the up and down directions, avoid the pressing plate 2 from tilting in the up and down directions, and improve the stability and reliability of the movement of the pressing plate 2.
[0040] In some other embodiments, there are multiple elastic members 3 and guide members 5. The multiple elastic members 3 can apply elastic force to the pressing plate 2 at different positions, which is beneficial for uniform force on the pressing plate 2 and avoids the pressing plate 2 from tilting due to uneven force. The multiple guide members 5 can make the pressing plate 2 move in the up and down directions and avoid the pressing plate 2 from tilting in the up and down directions, which is beneficial to improve the stability and reliability of the movement of the pressing plate 2.
[0041] In some embodiments of the present invention, referring to Figure 1 As shown, the lower mold 10 also includes a lower mold base 7, and the pad 1 is fixedly connected to the lower mold base 7, wherein the lower mold base 7 may include a mold frame 71, a pad 72 and a support plate 73, in the up and down directions, the pad 72 is connected between the mold frame 71 and the support plate 73, the mold frame 71 can be fixedly connected to the pad 72 by fasteners, the pad 72 can be fixedly connected to the support plate 73 by fasteners, and the support plate 73 can be fixedly connected to the punch press by fasteners, so that the lower mold 10 is fixed to the punch press, and the pad 1 can be fixedly connected to the mold frame 71 by fasteners, so that the pad 1 is fixedly connected to the lower mold base 7, and the mold frame 71 is suitable for reliably supporting the pad 1, the fasteners can be screws, and the fastening can also be fastening bolts and fastening nuts.
[0042] Reference Figure 1 As shown, the lower die base 7 may have a plurality of spaced-apart pads 72. When the material is being formed, the pressure exerted by the upper die on the material may be transmitted to the pad 1 through the forming punch 4 and the pressure plate 2. The pressure exerted on the pad 1 may be transmitted to the die frame 71. The plurality of pads 72 may support the die frame 71 at a plurality of positions to avoid local stress concentration on the die frame 71, thereby helping to reduce the risk of local deformation of the die frame 71.
[0043] In some embodiments of the present invention, referring to Figure 1-Figure 3 As shown, the pressing surface 22 has a baffle rib forming groove 221, which is arranged around the outside of the forming punch 4. When the material is being formed, the material can be formed into baffle ribs at the baffle rib forming groove 221. The baffle ribs can prevent the material outside the baffle ribs from flowing into the forming area of the plate corresponding to the forming punch 4, so as to avoid wrinkling when the material is formed into the plate.
[0044] Specifically, the upper mold is provided with a forming protrusion corresponding to the choke rib forming groove 221. When the upper mold is pressed against the material, the forming protrusion can press the part of the material corresponding to the choke rib forming groove 221 into the choke rib forming groove 221 to pre-tighten the material and form the material into choke ribs. The choke ribs can prevent the material outside the choke ribs from flowing into the forming area of the plate corresponding to the forming punch 4, thereby preventing the material from wrinkling during drawing.
[0045] It should be noted that the area of the material corresponding to the forming punch 4 is the forming area of the electrode plate, and the area outside the material corresponding to the forming punch 4 is the non-forming area. After the material is formed, the area outside the material corresponding to the forming punch 4 can be cut off to complete the processing of the electrode plate.
[0046] In some embodiments of the present invention, referring to Figure 4 As shown, the forming punch 4 has an exhaust hole 42, one end of the exhaust hole 42 is located on the pole plate forming surface 41, and the other end of the exhaust hole 42 is connected to the atmosphere. When the material is formed in the area corresponding to the forming punch 4, the gas between the material and the forming punch 4 can be discharged to the atmosphere through the exhaust hole 42, ensuring that the material can fully fit with the pole plate forming surface 41 of the forming punch 4, which is beneficial to improving the dimensional stability of the pole plate, thereby helping to improve the processing accuracy of the pole plate.
[0047] In some embodiments of the present invention, referring to Figure 4 As shown, there are multiple exhaust holes 42. When the material is being formed, the gas between the material and the forming punch 4 can be quickly discharged into the atmosphere through the multiple exhaust holes 42, which can effectively ensure that the material and the forming punch 4 are fully fitted, thereby helping to further improve the processing accuracy of the plate.
[0048] Reference Figure 4 As shown, the plate forming surface 41 of the forming punch 4 has a plurality of flow channel forming grooves 43, and the plurality of flow channel forming grooves 43 are used to form a plurality of flow channels on the plate. Each flow channel forming groove 43 is correspondingly provided with at least one exhaust hole 42. When the flow channels of the plate are formed, the gas in the cavity defined by the material and the flow channel forming grooves 43 can be discharged through the exhaust holes 42, so that the material and the flow channel forming grooves 43 can be fully fitted, so that the material can be more fully formed, which is beneficial to improve the stability of the flow channel size of the plate and is beneficial for the processed plate to reach the plate size required by the drawing.
[0049] Reference Figure 4 As shown, in the left-right direction, the multiple exhaust holes 42 on the forming punch 4 can be arranged at intervals to avoid the multiple exhaust holes 42 being concentrated in a local area of the forming punch 4, which is beneficial to improving the structural strength of the forming punch 4.
[0050] In some embodiments of the present invention, the lower mold base 7 also includes a guide column 74, which is fixedly connected to the mold frame 71. The guide column 74 is suitable for cooperating with the upper mold guide to enable the upper mold to move along a preset path, so as to ensure the accuracy of the upper mold position during the processing of the plate, thereby facilitating the improvement of the processing accuracy of the plate.
[0051] According to another embodiment of the utility model, a stamping die assembly for stamping a plate includes: a lower die 10 and an upper die, wherein the lower die 10 is the lower die 10 for stamping a plate of the above embodiment, and the upper die is liftably arranged above the lower die 10. When the plate is processed, the material for forming the plate can be first placed on the pressing plate 2 of the lower die 10, and then the lower die 10 descends and presses against the material, so that the part of the material corresponding to the plate forming surface 41 is drawn and formed into a plate structure.
[0052] According to the stamping die assembly for stamping pole plates in the embodiment of the utility model, when the lower die 10 changes from the initial state to the drawing state, in the height direction of the lower die 10, the pole plate forming surface 41 changes from being lower than the pressing surface 22 to being higher than the pressing surface 22, so as to pre-flatten the material used to form the pole plate, which is beneficial for the material to fully fit with the pole plate forming surface 41, thereby facilitating the improvement of the processing accuracy of the pole plate.
[0053] In some embodiments of the utility model, the upper mold has a first pressing surface and a second pressing surface, the first pressing surface is arranged on the outside of the second pressing surface, and in the up and down direction, the first pressing surface is located below the second pressing surface, the first pressing surface corresponds to the pressing surface 22 of the pressing plate 2, the first pressing surface has a forming protrusion corresponding to the baffle rib forming groove 221, and the second pressing surface corresponds to the pole plate forming surface 41 of the forming punch 4.
[0054] In some embodiments of the present invention, the processing method of the electrode plate includes the following steps:
[0055] Step S1: placing the material on the pressing surface of the pressing plate.
[0056] Step S2: the upper mold descends, and the first pressing surface first presses against the material on the pressing plate. The forming protrusion on the first pressing surface can press the part of the material at the blocking rib forming groove into the blocking rib forming groove to pre-tighten the material and form the material into blocking ribs. The blocking ribs can prevent the material outside the blocking ribs from flowing into the forming area of the plate corresponding to the forming punch, prevent the material from wrinkling during drawing, improve the forming quality of the material, and thus achieve primary forming of the material.
[0057] Step S3: The upper mold continues to descend, and the material may first contact the pole plate forming surface of the forming punch. The forming punch may support the portion of the material corresponding to the pole plate forming surface. The portion of the material corresponding to the pressing surface continues to move downward under the pressure of the upper mold, so that the portion of the material corresponding to the pole plate forming surface is stretched, and the stress of the primary formed material is removed to pre-flatten the portion of the material corresponding to the pole plate forming surface. Subsequently, the second pressing surface presses the area of the material corresponding to the pole plate forming surface, so that the material is formed into a pole plate structure in the area corresponding to the pole plate forming surface, thereby realizing the secondary forming of the material.
[0058] Step S4: cutting off the area of the material corresponding to the outer side of the plate forming surface to complete the processing of the plate.
[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.
[0060] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A lower die for stamping a plate, characterized in that: include: A backing plate (1), a pressing plate (2), an elastic member (3) and a forming punch (4), wherein the elastic member (3) is connected between the pressing plate (2) and the backing plate (1), the pressing plate (2) has an avoidance through hole (21), and the forming punch (4) is passed through the avoidance through hole (21) and is fixedly connected to the backing plate (1); The side of the forming punch (4) facing away from the backing plate (1) has a plate forming surface (41), the side of the pressing plate (2) facing away from the backing plate (1) has a pressing surface (22), and the lower die has an initial state and a drawing state; In the initial state, the electrode plate forming surface (41) is lower than the material pressing surface (22) in the height direction of the lower mold; In the drawing state, the pole plate forming surface (41) is higher than the pressing surface (22) in the height direction of the lower mold.
2. The lower die for punching a plate according to claim 1, characterized in that: It also comprises a guide member (5), wherein the guide member (5) is fixedly connected to the pressing plate (2), and in the height direction of the lower mold, the guide member (5) is guided and matched with the pad (1).
3. The lower die for punching a plate according to claim 2, characterized in that: The pad (1) has a guide through hole, and the guide member (5) comprises: a guide rod (51) and a limit head (52), wherein the guide rod (51) is inserted into the guide through hole, one end of the guide rod (51) is fixedly connected to the pressure plate (2), and the other end of the guide rod (51) is fixedly connected to the limit head (52), and the outer diameter of the limit head (52) is greater than the inner diameter of the guide through hole.
4. The lower die for punching a plate according to claim 3, characterized in that: In the initial state, the limit head (52) abuts against the end surface of the pad (1) facing away from the pressure plate (2).
5. The lower die for punching a plate according to any one of claims 2 to 4, characterized in that: The elastic member (3) and / or the guide member (5) are provided in multiple numbers.
6. The lower die for punching a plate according to claim 1, characterized in that: It also comprises a lower die base (7), and the pad (1) is fixedly connected to the lower die base (7).
7. The lower die for punching a plate according to claim 1, characterized in that: The pressing surface (22) has a flow-blocking rib forming groove (221), and the flow-blocking rib forming groove (221) is arranged around the outer side of the forming punch (4).
8. The lower die for punching a plate according to claim 1, characterized in that: The forming punch (4) has an exhaust hole (42), one end of the exhaust hole (42) is located on the electrode plate forming surface (41), and the other end of the exhaust hole (42) is connected to the atmosphere.
9. The lower die for punching a plate according to claim 8, characterized in that: The number of the exhaust holes (42) is plural.
10. A stamping die assembly for stamping a plate, characterized in that: include: A lower mold, wherein the lower mold is a lower mold for stamping a plate according to any one of claims 1 to 9; The upper mold is arranged above the lower mold in a liftable manner.