Sheet metal stamping blank and metal strip

Abstract

The utility model discloses a metal sheet stamping blank and a metal material strap, and relates to the technical field of battery manufacturing, the metal sheet stamping blank comprises an outer support, a metal sheet body and a connecting rib; the outer contour size of the metal sheet body is larger than that of a metal sheet to be formed, and the metal sheet body is not in direct contact with the outer support. The connecting rib is connected between the outer support and the metal sheet body. According to the metal sheet stamping blank, the metal sheet can be manufactured in a stamping mode, and the production efficiency of the metal sheet can be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a metal sheet stamping blank and a metal strip. Background Technology

[0002] Some battery casings are made of metal. Because metals have good strength and ductility, they can achieve both thin walls and good structural strength. Metal battery casings generally consist of a shell open at one end and a cover plate sealing the opening. The cover plate is thin, typically between 0.05mm and 0.3mm thick; that is, the battery cover plate is a thin metal sheet.

[0003] like Figure 1 and Figure 2 As shown, some battery covers require annular grooves 10 around their perimeter to form a stepped structure that is thicker in the middle and thinner at the outer edge. One process for fabricating this annular groove 10 is as follows: first, the shape of the cover is cut out, and then the annular groove 10 is formed around the perimeter of the cover by chemical etching.

[0004] Chemical etching is an inefficient process, and it is very difficult to meet the precision requirements of subsequent production and assembly. Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects.

[0005] The above content is only used to help understand the technical solution of this application and does not constitute an admission that the above is prior art. Utility Model Content

[0006] The purpose of this invention is to provide a metal sheet stamping blank and metal strip to improve the production efficiency of metal sheets.

[0007] To achieve the aforementioned objectives, this utility model provides, on the one hand, a metal sheet stamping blank, comprising:

[0008] External support;

[0009] A metal sheet, wherein the outer contour dimension of the metal sheet is larger than the outer contour dimension of the metal sheet to be formed, and the metal sheet does not directly contact the outer support;

[0010] A connecting rib connects the outer support and the metal sheet.

[0011] Furthermore, the distance between the outer contour of the metal sheet and the outer contour of the metal thin sheet is 0.5mm to 5mm.

[0012] Furthermore, the metal sheet is configured to conform to the shape of the metal sheet to be formed.

[0013] Furthermore, the metal sheet stamping blank is integrally formed, and the width of the narrowest part of the connecting rib is 0.2mm to 0.5mm.

[0014] Furthermore, the outer support is annular, the metal sheet is located inside the outer support, and the connecting rib is located within the annular space formed between the metal sheet and the outer support.

[0015] Furthermore, the connecting ribs are connected to both ends of the metal sheet in a first direction, and the first direction is perpendicular to the thickness direction of the metal sheet.

[0016] Alternatively, the connecting ribs are connected to both ends of the metal sheet in the first direction and both ends in the second direction. The first direction and the second direction are both perpendicular to the thickness direction of the metal sheet, and the first direction and the second direction are perpendicular to each other.

[0017] Furthermore, the metal sheet has a length direction and a width direction, and the number of connecting ribs provided at both ends of the width direction of the metal sheet is greater than the number of connecting ribs provided at both ends of its length direction.

[0018] Furthermore, the connecting rib includes a first connecting arm connected to the inner peripheral surface of the outer bracket and a second connecting arm connected to the outer peripheral surface of the metal sheet, wherein the first connecting arm and the second connecting arm are connected and arranged at an angle.

[0019] Furthermore, the first connecting arm is inclined relative to the inner circumferential surface of the outer bracket to which it is connected, and the second connecting arm is inclined relative to the outer circumferential surface of the metal sheet to which it is connected. The end of the second connecting arm closer to the first connecting arm is closer to the metal sheet than the end of the second connecting arm further away from the first connecting arm.

[0020] Furthermore, the included angle α2 between the inner circumferential surface of the first connecting arm and the outer bracket is greater than the included angle α1 between the outer circumferential surface of the second connecting arm and the metal sheet.

[0021] The angle α3 between the second connecting arm and the first connecting arm is a right angle or an obtuse angle;

[0022] The included angle α1 is 3° to 30°;

[0023] The included angle α2 is 60° to 90°;

[0024] The included angle α3 is 90° to 135°.

[0025] Furthermore, the connecting rib also includes a connecting portion connecting the second connecting arm and the outer peripheral surface of the metal sheet, the connecting portion being connected to the end of the second connecting arm away from the first connecting arm.

[0026] Furthermore, the connecting ribs are arranged in pairs to form connecting rib groups, and each connecting rib group includes two connecting ribs arranged symmetrically.

[0027] Furthermore, the metal sheet stamping blank is used to stamp and form a metal sheet, the metal sheet being a cover plate for a battery, the thickness of the metal sheet being 0.05mm to 0.3mm, and the outer edge of the cover plate having an annular groove.

[0028] Secondly, this utility model proposes a metal strip, comprising a metal sheet stamping blank as described in any of the preceding claims.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] According to at least one embodiment of this utility model, a metal sheet stamping blank includes an outer support, a metal sheet body, and connecting ribs. The outer contour dimension of the metal sheet body is larger than the outer contour dimension of the metal sheet to be formed. The metal sheet body and the outer support are not in direct contact; they are connected by connecting ribs. When stamping the outer edge of the metal sheet body, the connecting ribs can deform towards the side where the outer support is located, thereby reliably forming a thin-walled portion and ultimately forming an annular groove in the metal sheet. The metal sheet stamping blank enables the metal sheet to be produced by stamping, which is beneficial to improving the production efficiency of metal sheets. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of a metal sheet in some embodiments of this utility model.

[0032] Figure 2 yes Figure 1 Enlarged view of section I in the middle.

[0033] Figure 3 This is a three-dimensional schematic diagram of the metal sheet stamping blank in some embodiments of this utility model.

[0034] Figure 4 yes Figure 3 The figure shows a top view of a metal sheet stamping blank, illustrating the outer contour of the metal sheet.

[0035] Figure 5 This is a three-dimensional schematic diagram of a metal sheet stamping blank punched out of a thin-walled portion according to some embodiments of this utility model.

[0036] Figure 6 yes Figure 5 Enlarged view of Part II.

[0037] Figure 7 This is a schematic diagram of the process of punching a metal sheet off a metal sheet stamping blank in some embodiments of this utility model.

[0038] Figure 8 This is a schematic diagram of metal sheet stamping blanks in some embodiments of this utility model.

[0039] Figure 9 This is a schematic diagram of metal sheet stamping blanks in some embodiments of this utility model.

[0040] Figure 10 yes Figure 3 A top view of the metal sheet stamping blank shown.

[0041] Figure 11 yes Figure 10 An enlarged view of section III shows a group of connecting ribs.

[0042] Figure 12 yes Figure 11 A schematic diagram of the reverse setting of the connecting ribs.

[0043] Figure 13 This is a schematic diagram of the metal strip in some embodiments of this utility model.

[0044] Figure 14 This is a schematic diagram of the metal strip being punched out of the thin-walled section and the metal sheet being punched down in some embodiments of this utility model.

[0045] Figure 15 This is a schematic diagram of the metal strip in some embodiments of the present invention, showing the final product shape formed at each station.

[0046] Figure 16 This refers to the product shape formed by a portion of the metal strip in this utility model after passing through various workstations.

[0047] Figure 17 This is a three-dimensional schematic diagram of the metal substrate in some embodiments of this utility model.

[0048] Figure 18 This is a schematic diagram of some embodiments of the present invention when the material inside the connecting rib assembly is punched out on the metal substrate.

[0049] Figure 19 This is a schematic diagram of the metal strip in some embodiments of the present invention, with the portion being cut off at each workstation indicated by dashed lines. Detailed Implementation

[0050] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0051] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] Some embodiments of this utility model provide a metal sheet stamping blank, so that a metal sheet 1 (e.g.,) can be stamped from the metal sheet stamping blank. Figure 1 The metal sheet 1 shown can improve production efficiency. In some specific applications, the metal sheet 1 can be, for example, a battery cover. Figure 1 In the illustrated embodiment, the metal sheet 1 is the cover plate of the battery, and an annular groove 10 is provided on its outer edge. The thickness of the metal sheet 1 is 0.05mm to 0.3mm, and the material can be, for example, stainless steel. It is understood that in other embodiments, the metal sheet 1 may not be used as the cover plate of the battery, but may be used in other scenarios.

[0054] In some embodiments, such as Figure 3 As shown, the metal sheet stamping blank includes an outer support 2, a metal sheet body 3, and a connecting rib 4.

[0055] The outer contour 3a of the metal sheet 3 is larger than the outer contour 1a of the metal sheet to be formed. Figure 4 In the figure, the outer contour 1a of the metal sheet to be formed is shown in dashed line. It is located within the outer contour 3a of the metal sheet body 3, which is beneficial to provide sufficient size for subsequent forming of the metal sheet.

[0056] The metal sheet 3 and the outer support 2 are not in direct contact; they are connected by a connecting rib 4. Because the connecting rib 4 is relatively thin, it is easy for the connecting rib 4 connecting the outer support 2 and the metal sheet 3 to deform towards the side where the outer support 2 is located. In some embodiments, the width of the narrowest part of the connecting rib 4 is 0.2mm to 0.5mm, making it easier for it to deform towards the side where the outer support 2 is located.

[0057] The metal sheet blank with the above structure can be stamped into the required metal sheet by stamping. For example, refer to... Figure 5 and Figure 6 When forming the metal sheet 1, the outer edge region of the metal sheet 3 can be stamped first to form a thin-walled portion 30. Since the connecting rib 4 easily deforms towards the side where the outer support 2 is located, the outer edge region can more easily extend towards the side where the outer support 2 is located, thereby forming the thin-walled portion 30. Obviously, the outline of the portion 31 located within the thin-walled portion 30 matches the outline of the relatively thicker middle portion 11 of the metal sheet 1, thus forming the middle portion 11. (Reference) Figure 7 Then, a portion that matches the outer contour 1a of the metal sheet 1 is punched off the metal sheet 3. The punched-off portion is the metal sheet 1 that needs to be formed, and the outer edge of the metal sheet 1 naturally forms an annular groove 10.

[0058] In this way, metal sheets 1 can be formed by stamping, which is beneficial to improving production efficiency and ensuring dimensional accuracy through stamping, which is beneficial to subsequent assembly.

[0059] In some embodiments, the distance D between the outer contour 3a of the metal sheet 3 and the outer contour 1a of the metal sheet 1 is 0.5 mm to 5 mm, so that the outer edge of the metal sheet 3 is not too narrow to reliably stamp, nor too wide to make the outer edge difficult to stretch under pressure, thereby ensuring that the metal sheet 3 is easy to stamp to form the thin-walled portion 30. It should be noted that the distance D corresponds to the width of the annular portion of the metal sheet 3 located outside the outer contour 1a, and the distance D is 0.5 mm to 5 mm, which means that the width of the annular portion is within this value range at all points.

[0060] In some embodiments, reference Figure 4 The outer contour 3a of the metal sheet 3 is designed to mimic the outer contour 1a of the metal sheet 1, meaning they have the same shape. This ensures that when the outer edge of the metal sheet 3 is compressed, the resistance experienced by each part as it extends outward is less different, allowing for more uniform outward extension and improving forming quality. Furthermore, the outer contour 3a of the metal sheet 3 and the outer contour 1a of the metal sheet 1 are equidistant, further ensuring that the resistance experienced by each part as it extends outward is more consistent when the outer edge of the metal sheet 3 is compressed.

[0061] In some embodiments, the metal sheet stamping blank is integrally formed. For example, the outer support 2, the metal sheet 3, and the connecting rib 4 can be punched out from a metal substrate. Optionally, the outer support 2 is provided with a limiting structure 21, which can be, for example, a groove or a hole, to facilitate positioning during the stamping process of the metal sheet 1. It is understood that the thickness of the metal sheet 3 is consistent with the thickness of the metal sheet 1 to be formed, so that the thickness of the formed metal sheet 1 meets the design requirements.

[0062] In some embodiments, the outer support 2 is annular, the metal sheet 3 is located inside the outer support 2, and the connecting rib 4 is located within the annular space 20 formed between the metal sheet 3 and the outer support 2. It is understood that the outer support 2 does not necessarily have to be annular; an annular outer support 2 can give the metal sheet stamping blank better structural strength and prevent deformation.

[0063] In some embodiments, connecting ribs 4 are connected to both ends of the metal sheet 3 in a first direction, and the first direction is perpendicular to the thickness direction of the metal sheet 3. The first direction can be, for example, the length direction or the width direction of the metal sheet 3. Figure 8 In the illustrated embodiment, connecting ribs 4 are provided at both ends of the metal sheet 3 along its length. Figure 9 In the illustrated embodiment, connecting ribs 4 are provided at both ends of the metal sheet 3 in the width direction.

[0064] In some embodiments, both ends of the metal sheet 3 in the first direction and both ends of the metal sheet 3 in the second direction are connected to connecting ribs 4. Both the first direction and the second direction are perpendicular to the thickness direction of the metal sheet 3, and the first direction and the second direction are perpendicular to each other. For example, one of the first direction and the second direction is the length direction of the metal sheet 3, and the other is the width direction of the metal sheet 3. Figure 10 In the illustrated embodiment, connecting ribs 4 are provided at both ends of the metal sheet 3 in the length direction and at both ends in the width direction.

[0065] In some embodiments, the metal sheet 3 has a length direction and a width direction, that is, the length of the metal sheet 3 is greater than its width, and the number of connecting ribs 4 provided at both ends of the width direction of the metal sheet 3 is greater than the number of connecting ribs 4 provided at both ends of its length direction. In this way, there are more connecting ribs 4 corresponding to the long side of the metal sheet 3, the long side can be supported more reliably, preventing the metal sheet 3 from tilting due to the excessive length of the suspended section, and the overall structural strength is better. Figure 10 In the illustrated embodiment, two connecting ribs 4 are provided at each end of the length direction of the metal sheet 3, and four connecting ribs 4 are provided at each end of the width direction.

[0066] In some embodiments, the connecting ribs 4 are arranged in pairs to form connecting rib groups, and each connecting rib group includes two connecting ribs 4 arranged symmetrically. For example... Figure 10 As shown, Figure 10 In the illustrated embodiment, a set of connecting ribs is provided at each end of the length direction of the metal sheet 3, and two sets of connecting ribs are provided at each end of the width direction.

[0067] It is understandable that, due to the small width of the connecting rib 4 and the small overall thickness of the metal sheet stamping blank, the connecting rib 4 is relatively easy to deform. To further facilitate the deformation of the connecting rib 4, in some embodiments, such as... Figure 11 As shown, the connecting rib 4 includes a first connecting arm 40 connected to the inner peripheral surface 2a of the outer support 2 and a second connecting arm 41 connected to the outer peripheral surface 3b of the metal sheet 3. The first connecting arm 40 and the second connecting arm 41 are connected and angled together, meaning they are neither parallel nor overlapping. Because the first connecting arm 40 and the second connecting arm 41 are angled together, when subjected to pressure towards the side where the outer support 2 is located, the angle between the first connecting arm 40 and the second connecting arm 41 will change, allowing for easier deformation.

[0068] Optionally, the first connecting arm 40 and the second connecting arm 41 are connected by an arc, which helps to reduce the risk of breakage at the connection while allowing the relative angle between the first connecting arm 40 and the second connecting arm 41 to change, thereby ensuring the smooth progress of the production process.

[0069] In some embodiments, the first connecting arm 40 is inclined relative to the inner peripheral surface 2a of the outer bracket 2 to which it is connected. This allows the first connecting arm 40 to bend and deform towards the inner peripheral surface 2a when the connecting rib 4 is subjected to pressure towards the outer bracket 2, reducing the difficulty of deforming the first connecting arm 40. In some embodiments, the second connecting arm 41 is inclined relative to the outer peripheral surface 3b of the metal sheet 3 to which it is connected. This allows the second connecting arm 41 to more easily undergo elastic deformation when the connecting rib 4 is subjected to pressure towards the outer bracket 2, reducing the difficulty of deforming the second connecting arm 41.

[0070] Optionally, the included angle α1 between the second connecting arm 41 and the outer peripheral surface 3b of the metal sheet 3 is 3° to 30°, so that the lever arm of the second connecting arm 41 is relatively longer, making it easier for the second connecting arm 41 to deform. Further optionally, the included angle α2 between the first connecting arm 40 and the inner peripheral surface 2a of the outer bracket 2 is greater than the included angle α1 between the second connecting arm 41 and the outer peripheral surface 3b of the metal sheet 3. The included angle α2 can be, for example, 60° to 90°. In this way, deformation can be mainly achieved through the second connecting arm 41, while reducing the stress at the connection between the first connecting arm 40 and the inner peripheral surface 2a of the outer bracket 2, preventing tearing at the connection. Optionally, the included angle α1 is 5° to 15°, and further optionally, the included angle α2 is 70° to 80°. Further optionally, the connection 400 between the first connecting arm 40 and the outer bracket 2 is a tapered shape with its width gradually increasing towards the side where the outer bracket 2 is located, to further improve the connection strength. The included angles α1 and α2 can be measured by the relatively flat side of the corresponding connecting arm.

[0071] In some embodiments, the included angle between the second connecting arm 41 and the first connecting arm 40 is a right angle or an obtuse angle, so as to increase the lever arm and allow the connecting rib 4 to easily deform toward the side where the outer support 2 is located. Further optionally, the included angle α3 between the second connecting arm 41 and the first connecting arm 40 is 90° to 135°, and further optionally, the included angle α3 is an obtuse angle.

[0072] In some embodiments, the connecting rib 4 further includes a connecting portion 42 connecting the second connecting arm 41 and the outer peripheral surface 3b of the metal sheet 3. The connecting portion 42 is connected to the end of the second connecting arm 41 away from the first connecting arm 40 and extends toward the side where the metal sheet 3 is located to connect with the metal sheet 3. By providing the connecting portion 42, the distance between the second connecting arm 41 and the metal sheet 3 can be increased, providing space for the extension and deformation of the metal sheet 3. Moreover, when the metal sheet 3 extends and deforms, the connecting portion 42 applies force to the end of the second connecting arm 41, resulting in a larger lever arm and making it easier to push the connecting rib 4 to deform.

[0073] It is understood that the second connecting arms 41 of the two connecting ribs 4 in the connecting rib group do not necessarily extend toward each other, as in other embodiments, such as Figure 12 As shown, the two second connecting arms 41 extend in a direction away from each other.

[0074] Some embodiments of this utility model propose a metal strip comprising a metal sheet stamping blank as described above.

[0075] In some embodiments, such as Figure 13 As shown, the metal strip comprises multiple continuously arranged metal sheet stamping blanks. After the metal sheet stamping blanks enter the stamping die, as... Figure 14As shown, the outer edge of the metal sheet 3 is first stamped to form a thin-walled portion 30, and then a portion of the metal sheet 3 is stamped off to form the required metal sheet 1. The metal strip is continuously fed into the stamping die by the feeding mechanism, and the required metal sheet 1 can be continuously stamped out.

[0076] In some embodiments, the metal strip is initially a solid strip-shaped metal substrate, which is directly punched out as a thin metal sheet 1 through multiple punching operations using a continuous die, such as... Figure 15 As shown, the progressive die includes multiple stations arranged sequentially. The metal strip moves forward one station at a time, and the stamping die performs the corresponding operation. Figure 16 The diagram shows a portion of a metal substrate being sequentially punched. As can be seen, through the punching operations at stations one through five, a portion of the metal strip is removed, forming the metal sheet stamping blank described above. At station six, a thin-walled portion 30 is formed on the outer edge of the metal sheet 3. At station seven, the metal sheet 1 is punched off. This allows for continuous punching of the metal sheet 1 onto the metal substrate, further improving forming efficiency. The metal strip has equidistantly arranged guide pin holes 60 to facilitate movement and positioning of the metal strip during punching. The guide pin holes 60 are punched out at station one.

[0077] Some embodiments of this utility model propose a method for forming metal sheets to produce metal sheets 1.

[0078] In some embodiments, the method for forming a metal sheet includes the following steps:

[0079] S1. Provides a sheet-like metal substrate 6, such as Figure 17 As shown.

[0080] S2. Stamp metal sheet 3 and connecting rib 4 onto metal substrate 6, refer to Figure 10 The portion of the metal substrate 6 located outside the metal sheet 3 forms an outer support 2. The outer contour dimension of the metal sheet 3 is larger than the outer contour dimension of the metal sheet 1 to be formed. The metal sheet 3 and the outer support 2 are not in direct contact, but are connected to the outer support 2 through connecting ribs 4. This step actually forms the metal sheet stamping blank described above on the metal substrate 6.

[0081] S3. Stamp the outer edge of the metal sheet 3 to form an annular thin-walled portion 30 on the outer edge of the metal sheet 3, such as Figure 5 As shown.

[0082] S4. Punch off a portion from the metal sheet 3 that matches the outer contour of the metal sheet 1. The punched-off portion is the required metal sheet 1. Figure 7 As shown.

[0083] It is understandable that the descriptions of the structure and positional relationship of the outer support 2, connecting rib 4 and metal sheet 3 can all refer to the above text.

[0084] In some embodiments, the connecting ribs 4 are arranged in pairs to form connecting rib groups, and each connecting rib group includes two connecting ribs 4 arranged symmetrically, for example... Figure 10 The structure shown is for Figure 10 The description of the structure shown can be found above. To more reliably produce this structure, step S2, the step of stamping the metal sheet 3 and connecting rib 4 onto the metal substrate 6, includes the following steps:

[0085] S21. Punch away the material inside the two connecting ribs of the connecting rib group to form... Figure 18 The structure shown;

[0086] S22. Punch away the material located between two adjacent connecting rib groups to form Figure 10 The structure shown.

[0087] by Figure 10 Taking the structure shown as an example, the material to be removed includes the first part 70a, the second part 70b, the third part 70c, the fourth part 70d, the fifth part 70e, and the sixth part 70f located within the two connecting ribs of the connecting rib group, and the seventh part 71a, the eighth part 71b, the ninth part 71c, the tenth part 71d, the eleventh part 71e, and the twelfth part 71f located between two adjacent connecting rib groups. Among them, the seventh part 71a, the eighth part 71b, the ninth part 71c, and the tenth part 71d correspond to the corners of the metal sheet 3, and the eleventh part 71e and the twelfth part 71f correspond to the long side of the metal sheet 3.

[0088] When punching away material from the metal substrate 6, the die needs to press down on the outer portion of the material to be removed, and then the punch cuts down the portion to be removed. The larger the solid area of ​​the pressed portion, the easier it is to punch down the material, reducing the stretching deformation of the solid portion during punching. Since there is relatively little material within the two connecting ribs, removing the material within this portion first results in a larger contact area between the die and the metal substrate 6 when removing the material between adjacent connecting rib groups, leading to better forming results. Furthermore, because the connecting rib 4 is relatively thin, if the portions on both sides are punched simultaneously, the connecting rib 4 is difficult to be reliably pressed and limited by the die, making it difficult to reliably form the connecting rib 4. Therefore, punching down the material on both sides of the connecting rib 4 sequentially, rather than simultaneously, can better form the connecting rib 4 and reduce the precision requirements of the die.

[0089] Optionally, when punching away the material between two adjacent connecting rib groups, the material on both sides of the connecting rib group can be punched away in stages. For example, the seventh part 71a and the eighth part 71b can be punched away simultaneously, instead of the seventh part 71a and the eleventh part 71e simultaneously. Since the connecting rib 4 is relatively thin, by punching away the material on both sides of the connecting rib group in stages, the contact area between the mold and the solid near the connecting rib 4 is relatively large with each punching, which is beneficial to improving the molding quality and reliability.

[0090] Figure 10 In the illustrated embodiment, the metal sheet 3 has a length direction and a width direction. Two sets of connecting ribs are provided at both ends of the width direction of the metal sheet 3, and one set of connecting ribs is provided at both ends of the length direction of the metal sheet 3. Step S21, when punching away the material located between two adjacent sets of connecting ribs, may include the following steps:

[0091] S211. Punch away the material corresponding to the corner of the metal sheet 3 between two adjacent connecting rib groups;

[0092] S212. Punch away the material between two adjacent connecting rib groups located at the same end in the width direction of the metal sheet 3.

[0093] For example, the seventh part 71a, the eighth part 71b, the ninth part 71c, and the tenth part 71d corresponding to the corners of the metal sheet 3 can be punched off first, and then the eleventh part 71e and the twelfth part 71f can be punched off. It is understood that the above steps do not mean that all the material corresponding to the corners must be cut off first, and then the material corresponding to the long side must be cut off. Rather, it means that for the connecting rib group 4 that is adjacent to both the material corresponding to the corners and the material corresponding to the long side, the material corresponding to the corners of the metal sheet 3 should be punched off first, and then the material corresponding to the long side of the metal sheet 3 should be punched off. For example, taking the connecting rib group in the upper right corner as an example, the seventh part 71a needs to be punched off first, and then the eleventh part 71e needs to be punched off.

[0094] The material between two adjacent connecting rib groups can be removed in multiple steps, for example, one at a time. To improve production efficiency, when punching off the material corresponding to the corner of the metal sheet 3 between two adjacent connecting rib groups, two pieces of material corresponding to the corner can be punched off at once. Optionally, the material corresponding to the corner at both ends of the width direction of the metal sheet 3 can be punched off in stages. For example, the seventh part 71a and the eighth part 71b are punched off first, followed by the ninth part 71c and the tenth part 71d. To further improve production efficiency, when punching off the ninth part 71c and the tenth part 71d, the eleventh part 71e can be cut off simultaneously, followed by the twelfth part 71f.

[0095] Optionally, when punching away the material between two adjacent connecting rib groups at the same end in the width direction of the metal sheet 3, the material at both ends in the width direction of the metal sheet 3 may be punched away in stages. For example, the eleventh part 71e may be punched away first, followed by the twelfth part 71f. It is understood that the material at both ends in the width direction of the metal sheet 3 corresponds to the long side of the metal sheet 3.

[0096] In some embodiments, reference Figure 15 The metal substrate 6 is strip-shaped, meaning it is a strip structure, and has equidistant guide pin holes 60 to facilitate movement and positioning. At this point, a metal sheet forming method can be performed using a progressive die. As described above, a metal sheet stamping blank can be formed through multiple punching operations using a progressive die. Then, the outer edge of the metal sheet is stamped to form a thin-walled portion 30, and finally, the metal sheet 1 is punched out.

[0097] Optionally, when punching away material located between two adjacent connecting rib groups, first punch away the material biased towards the side of the next station, then punch away the material biased towards the side of the previous station. The side of the next station refers to the forward side of the strip, and the side of the previous station refers to the opposite side of the forward side. Figure 10 Taking the structure shown as an example, when punching the material corresponding to the corner of the metal sheet 3, the seventh part 71a and the eighth part 71b, which are close to the next station, can be punched off first, and then the ninth part 71c and the tenth part 71d, which are close to the previous station, can be cut off. When punching the material corresponding to the long side of the metal sheet 3, the eleventh part 71e, which is close to the next station, can be punched off first, and then the twelfth part 71f, which is close to the previous station, can be punched off.

[0098] It is understandable that the workstations are set up sequentially and adjacently, with the workstation for the next punching process adjacent to the workstation for the previous punching process, such as... Figure 19 As shown, Figure 19The diagram, illustrated with dashed lines, shows the positions of the material punched at each station during continuous die stamping. As can be seen, when material biased towards the next station is punched first, followed by material biased towards the previous station, the positions of the material to be punched at adjacent stations are relatively symmetrical, and the corresponding punch positions are also relatively symmetrical. For example, when stations three and four simultaneously punch parts 71a, 71b, 71c, and 71d, parts 71a and 71d are relatively symmetrical, and parts 81b and 71c are relatively symmetrical. Similarly, when stations four and five simultaneously punch parts 71e and 71f, parts 71e and 71f are relatively symmetrical. Because the material being punched simultaneously is relatively symmetrical, the forces on the material between adjacent stations are also more symmetrical during punching, which helps prevent the material from stretching and extending to one side, thus ensuring the dimensional accuracy of the punching.

[0099] It is understandable that when the seventh part 71a and the eighth part 71b are cut off simultaneously at the same station, and the ninth part 71c and the tenth part 71d are cut off simultaneously at the same station, since the seventh part 71a and the eighth part 71b are relatively symmetrical, and the ninth part 71c and the tenth part 71d are also relatively symmetrical, the force on the material in the length direction of the metal sheet 3 during punching is also more symmetrical, which is beneficial to ensuring the dimensional accuracy of punching.

[0100] The following describes a feasible method for forming metal sheets using a progressive die, which includes stations one through eight. (See reference...) Figure 19 The work performed at each workstation is as follows:

[0101] Station 1: Punching guide holes. Specifically, guide pin holes 60 are punched on both sides of the strip width direction. The width and length directions of the strip correspond to the length and width directions of the metal sheet 3, respectively. Optionally, the guide pin holes 60 are located between two adjacent outer supports 2, with half of the guide pin holes 60 located on one outer support 2 and the other half located on the other outer support 2.

[0102] Station 2: Punch cut off the portions of the two connecting bars 4 located in the connecting bar group, namely the first part 70a, the second part 70b, the third part 70c, the fourth part 70d, the fifth part 70e, and the sixth part 70f. It is understood that the shape and position of these portions depend on the shape and position of the connecting bar group.

[0103] Station 3: Punch away the material located between two adjacent connecting rib groups at the corner of the metal sheet 3 that is close to the next station (station 4), that is, punch away the seventh part 71a and the eighth part 71b.

[0104] Station 4: Punch away the material between two adjacent connecting rib groups corresponding to the corner of the metal sheet 3 near the previous station (station 3), and at the same time punch away the material between two adjacent connecting rib groups corresponding to the long side of the metal sheet 3 near the next station (station 5), that is, punch away the ninth part 71c, the tenth part 71d and the eleventh part 71e.

[0105] Station 5: Punch away the material between the two adjacent connecting rib groups corresponding to the long side of the metal sheet 3 that is close to the previous station (station 4), that is, punch away the twelfth part 71f.

[0106] Station 6: Stamp the outer edge of the metal sheet 3 to form a thin-walled part 30. The inner contour of the thin-walled part 30 is consistent with the outer contour of the middle part 11 of the metal sheet 1 to be formed.

[0107] Station 7: Punching metal sheet 3. The outer contour of the punched part is consistent with the outer contour of the metal sheet 1 to be formed. The punched part is the metal sheet 1 to be produced.

[0108] Optionally, among the aforementioned workstations, at least workstations three to five are arranged sequentially adjacent to each other and perform punching simultaneously, so as to make the punching process more reliable and the dimensional accuracy of the formed product higher. Further optionally, workstations one to seven are all arranged sequentially adjacent to each other and work simultaneously, so as to improve production efficiency and improve the compactness of progressive dies.

[0109] Understandably, when the progressive die is working, the strip moves from station one to station seven, and each time it moves one station, the progressive die performs a stamping / cutting action to complete the work corresponding to each station.

[0110] Understandably, if it is necessary to shape... Figure 13 The strip corresponding to the metal sheet stamping blank shown can be processed by a progressive die that retains only stations one to five.

[0111] It is understandable that forming metal sheets through progressive dies can improve production efficiency, but it is not necessary. For example, the work of different stations can be completed in different steps using multiple dies, and the metal substrate 6 does not have to be in strip form; it can be a single sheet, forming the metal sheet 1 through multiple dies.

[0112] It should be noted that, in the absence of conflict, the various embodiments described herein can be combined with each other to obtain more implementation schemes.

[0113] The above are merely specific embodiments of this utility model. Any improvements made based on the concept of this utility model shall be considered within the scope of protection of this utility model.

Claims

1. A metal sheet stamping blank, characterized by, The application relates to a metal sheet stamping blank forming device. The device comprises: an outer support (2); a metal sheet body (3) with an outer contour size larger than that of a metal sheet (1) to be formed, which is not in direct contact with the outer support (2); and 2. The metal foil stamping blank of claim 1, wherein, a connecting rib (4) connected between the outer support (2) and the metal sheet body (3).

3. The metal foil stamping blank of claim 1, wherein, The distance between the outer contour of the metal sheet body (3) and the metal sheet (1) is 0.5-5 mm.

4. The metal foil stamping blank of claim 1 wherein, The metal sheet body (3) is shaped like the metal sheet (1) to be formed.

5. The metal foil stamping blank of claim 1 wherein, The metal sheet stamping blank is integrally formed, and the width of the narrowest part of the connecting rib (4) is 0.2-0.5 mm.

6. The metal foil stamping blank of claim 1 wherein, The outer support (2) is annular, the metal sheet body (3) is located in the outer support (2), and the connecting rib (4) is located in an annular space (20) formed between the metal sheet body (3) and the outer support (2). The two ends of the metal sheet body (3) in a first direction perpendicular to the thickness direction of the metal sheet body (3) are connected with the connecting rib (4).

7. The metal foil stamping blank of claim 1 wherein, Alternatively, the two ends of the metal sheet body (3) in a first direction and the two ends of the metal sheet body (3) in a second direction are both connected with the connecting rib (4), the first direction and the second direction are both perpendicular to the thickness direction of the metal sheet body (3), and the first direction and the second direction are perpendicular to each other.

8. A metal flake stamping blank as claimed in any one of claims 1 to 7, characterized in that The metal sheet body (3) has a length direction and a width direction, and the number of the connecting ribs (4) arranged at the two ends of the metal sheet body (3) in the width direction is greater than that in the length direction.

9. The metal foil stamping blank of claim 8, wherein, The connecting rib (4) comprises a first connecting arm (40) connected with the inner circumferential surface of the outer support (2) and a second connecting arm (41) connected with the outer circumferential surface of the metal sheet body (3), the first connecting arm (40) and the second connecting arm (41) are connected and arranged at an angle.

10. The metal foil stamping blank of claim 9, wherein, The first connecting arm (40) is arranged obliquely relative to the inner circumferential surface of the outer support (2) connected therewith, the second connecting arm (41) is arranged obliquely relative to the outer circumferential surface of the metal sheet body (3) connected therewith, and the end of the second connecting arm (41) close to the first connecting arm (40) is closer to the metal sheet body (3) than the end thereof away from the first connecting arm (40). The included angle alpha 2 between the first connecting arm (40) and the inner circumferential surface of the outer support (2) is greater than the included angle alpha 1 between the second connecting arm (41) and the outer circumferential surface of the metal sheet body (3). The included angle alpha 3 between the second connecting arm (41) and the first connecting arm (40) is a right angle or an obtuse angle. The included angle alpha 1 is 3-30 degrees. The included angle alpha 2 is 60-90 degrees.

11. The metal foil stamping blank of claim 9, wherein, The included angle alpha 3 is 90-135 degrees. The connecting rib (4) further comprises a connecting part (42) connected between the second connecting arm (41) and the outer circumferential surface of the metal sheet body (3), and the connecting part (42) is connected with the end of the second connecting arm (41) away from the first connecting arm (40).

12. The metal foil stamping blank of claim 9, wherein, The connecting ribs (4) are arranged in pairs to form a connecting rib group, and each connecting rib group comprises two connecting ribs (4) arranged symmetrically.

13. The metal foil stamping blank of claim 9, wherein, It is used for stamping a metal sheet (1) which is a cover plate of a battery, the thickness of the metal sheet (1) is 0.05mm-0.3mm, and the outer edge of the cover plate has an annular groove (10).

14. A metal strip, characterized in that A metal sheet stamping blank as claimed in any one of claims 1 to 13.

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