Progressive die forming mechanism for producing rivets and progressive die
By using a progressive die forming mechanism in the rivet production process to form upper and lower contoured shapes of the strip, the problem of rivet head stretching and concavity is solved, improving the mechanical strength and appearance quality of the rivet.
Patent Information
- Application Number
- CN202422040836.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-08-21
AI Technical Summary
In the current rivet production process, after blanking, the rivet head is prone to stretching and indentation on the other end face away from the rivet rod, resulting in insufficient mechanical strength and unqualified appearance.
A progressive die forming mechanism is adopted, including a preforming component and a shaping component. By forming an upper profile and a lower profile on the strip, sufficient metal stretching allowance is provided to avoid stretching indentation of the rivet head away from the other end face of the rivet rod.
This effectively improved the mechanical strength and appearance quality of the rivets, ensuring the overall structural integrity of the rivets.
Smart Images
Figure CN223543909U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rivet production technology, and in particular to a progressive die forming mechanism and a progressive die for producing rivets. Background Technology
[0002] A rivet is a nail-shaped object used to connect two parts (or components) with through holes and caps at one end. Riveting technology is applied in the field of lithium battery structural components, including the manufacture of battery cell cover plates. By precisely controlling the magnitude of the force and the riveting height, the compression of the sealing ring is controlled, ensuring the sealing of gaps between various parts and preventing electrolyte leakage due to poor sealing of the cover plate components. It is clear from this that the sealing function of rivets plays a crucial role in the safety and reliability of battery use.
[0003] With the trend of miniaturization of lithium batteries, the components of lithium batteries also need to be more refined and precise. For example, the minimum total length of some rivets used in lithium batteries can be as low as 1.7mm, while also requiring the rivets to have good mechanical strength.
[0004] Currently, some manufacturers typically use stamping dies, specifically progressive dies, to produce rivets. In actual production, because the ratio of rivet shank length to rivet head thickness is not unique, when the rivet shank length is required to be relatively long, and progressive dies are used to stamp strips with a thickness ranging from 1.5mm to 2.5mm, some manufacturers directly stretch the strip to form the rivet shank. This often results in the rivet head, after blanking, exhibiting a stretched and concave structure on the opposite end face of the rivet shank. This leads to insufficient mechanical strength and non-compliance with appearance requirements in the overall rivet structure. Utility Model Content
[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a progressive die forming mechanism and progressive die for producing rivets that can effectively avoid the structural feature of the rivet head being stretched and dented on the other end face away from the rivet rod after blanking, thereby effectively ensuring the mechanical strength of the overall rivet structure and the qualified appearance requirements.
[0006] The objective of this utility model is achieved through the following technical solution:
[0007] A progressive die forming mechanism for producing rivets, comprising:
[0008] The preforming component includes an upper die pre-punch part and a lower die pre-punch part; the forming end of the upper die pre-punch part is provided with a first pre-storage groove, and the forming end of the lower die pre-punch part is provided with a first lower die circular limiting groove and a second pre-storage groove, the first pre-storage groove and the first lower die circular limiting groove are arranged opposite to each other, and the first lower die circular limiting groove and the second pre-storage groove are connected.
[0009] A forming assembly is provided, wherein the preforming assembly and the forming assembly are sequentially distributed in the forward direction of the strip; the forming assembly includes an upper die forming part and a lower die forming part; the forming end of the upper die forming part has a forming plane, and the forming end of the lower die forming part has a second lower die circular limiting groove and a rivet forming groove, the forming plane is opposite to the second lower die circular limiting groove, and the second lower die circular limiting groove is connected to the rivet forming groove; both the first pre-storage groove and the second pre-storage groove are used to accommodate part of the deformed strip under compression, so that an upper profile of the strip is formed in the first pre-storage groove, and a lower profile of the strip is formed in the second pre-storage groove.
[0010] In one embodiment, the cross-sections of both the first pre-storage tank and the second pre-storage tank are U-shaped and tapered.
[0011] In one embodiment, the opening of the second pre-storage tank is provided with an inclined transition surface.
[0012] In one embodiment, the volume of the first pre-storage tank is greater than the volume of the second pre-storage tank.
[0013] In one embodiment, the upper profile of the strip and the lower profile of the strip are arranged opposite to each other.
[0014] In one embodiment, the upper die pre-punching part and the upper die shaping part are both integrally formed structures.
[0015] In one embodiment, both the lower die pre-punching part and the lower die shaping part are integrally formed structures.
[0016] A progressive die includes a progressive die forming mechanism for producing rivets as described in any of the above embodiments. The progressive die has an upper die pre-punch part, a lower die pre-punch part, an upper die forming part, and a lower die forming part. The progressive die also includes an upper die base and a lower die base. The upper die pre-punch part and the upper die forming part are both fixedly installed on the upper die base, and the lower die pre-punch part and the lower die forming part are both fixedly installed on the lower die base.
[0017] Compared with the prior art, the present invention has at least the following advantages:
[0018] When the forming end of the upper die pre-punching part is aligned and pressed with the forming end of the lower die pre-punching part, the first pre-storage groove contains part of the deformed strip material that has been compressed, resulting in a strip upper profile protruding from the top surface of the strip. Similarly, the second pre-storage groove also contains part of the deformed strip material that has been compressed, resulting in a strip lower profile protruding from the bottom surface of the strip. Then, when the forming plane of the upper die forming part is aligned and pressed with the second lower die circular limiting groove of the lower die forming part, the strip upper profile and strip lower profile can provide sufficient metal stretching allowance for the strip to be extruded and filled into the rivet forming groove. This effectively avoids the structural feature of stretching and indentation on the other end face of the rivet head away from the rivet rod, thus effectively ensuring that the rivet after blanking has good mechanical strength and meets the qualified appearance requirements. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of a progressive die forming mechanism for producing rivets in one embodiment;
[0021] Figure 2 for Figure 1 Another schematic diagram of a progressive die forming mechanism for producing rivets is shown.
[0022] Figure 3 for Figure 1 The diagram shows a half-section of a progressive die forming mechanism used for producing rivets.
[0023] Figure 4 for Figure 3 A partially enlarged schematic diagram of point A in the progressive die forming mechanism used for producing rivets;
[0024] Figure 5 for Figure 3 A partially enlarged schematic diagram of point B in the progressive die forming mechanism used for producing rivets;
[0025] Reference numerals: Progressive die forming mechanism 10 for producing rivets; preforming component 100; upper die pre-punch part 110; first pre-storage groove 1101; lower die pre-punch part 120; first lower die circular limiting groove 1201; second pre-storage groove 1202; inclined transition surface 1210; shaping component 200; upper die shaping part 210; shaping plane 2110; lower die shaping part 220; second lower die circular limiting groove 2201; rivet forming groove 2202; strip 300. Detailed Implementation
[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.
[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0029] This disclosure provides a progressive die forming mechanism for producing rivets, including a preforming assembly and a shaping assembly. The preforming assembly includes an upper die pre-punch and a lower die pre-punch; the forming end of the upper die pre-punch has a first pre-storage groove, and the forming end of the lower die pre-punch has a first lower die circular limiting groove and a second pre-storage groove, the first pre-storage groove and the first lower die circular limiting groove being opposite to each other and communicating with each other; the preforming assembly and the shaping assembly are sequentially distributed in the forward direction of the strip; the shaping assembly includes an upper die shaping component and a lower die. The upper die forming part has a forming plane at its forming end, and the lower die forming part has a second lower die circular limiting groove and a rivet forming groove at its forming end. The forming plane is opposite to the second lower die circular limiting groove, and the second lower die circular limiting groove is connected to the rivet forming groove. The first pre-storage groove and the second pre-storage groove are both used to accommodate part of the deformed strip under compression, so that an upper profile of the strip is formed in the first pre-storage groove, and a lower profile of the strip is formed in the second pre-storage groove.
[0030] Please see Figures 1 to 5 To better understand the progressive die forming mechanism 10 for producing rivets according to this application, the following further explanation of the progressive die forming mechanism 10 for producing rivets is provided:
[0031] An embodiment of a progressive die forming mechanism 10 for producing rivets includes a preforming assembly 100 and a shaping assembly 200. The preforming assembly 100 includes an upper die pre-punch part 110 and a lower die pre-punch part 120; the forming end of the upper die pre-punch part 110 has a first pre-storage groove 1101, and the forming end of the lower die pre-punch part 120 has a first lower die circular limiting groove 1201 and a second pre-storage groove 1202. The first pre-storage groove 1101 and the first lower die circular limiting groove 1201 are opposite to each other, and the first lower die circular limiting groove 1201 and the second pre-storage groove 1202 are connected; the preforming assembly 100 and the shaping assembly 200 are sequentially distributed in the forward direction of the strip 300; the shaping assembly 200 includes an upper die shaping part 210 and a lower die shaping part 2200. 20; The upper die forming part 210 has a forming plane 2110 at its forming end, and the lower die forming part 220 has a second lower die circular limiting groove 2201 and a rivet forming groove 2202 at its forming end. The forming plane 2110 and the second lower die circular limiting groove 2201 are arranged opposite to each other, and the second lower die circular limiting groove 2201 is connected to the rivet forming groove 2202. The first pre-storage groove 1101 and the second pre-storage groove 1202 are both used to accommodate part of the compressed deformed strip 300, so that an upper profile (not shown) of the strip is formed in the first pre-storage groove 1101, and a lower profile (not shown) of the strip is formed in the second pre-storage groove 1202.
[0032] In this embodiment, when the forming end of the upper die pre-punch 110 is aligned and pressed with the forming end of the lower die pre-punch 120, the first pre-storage groove 1101 contains a portion of the deformed strip 300 under compression, resulting in a strip upper protrusion (not shown) on the top surface of the strip 300; similarly, the second pre-storage groove 1202 also contains a portion of the deformed strip 300 under compression, resulting in a strip lower protrusion (not shown) on the bottom surface of the strip 300; thus, when the upper die is adjusted... The shaping plane 2110 of the forming part 210 is aligned and extruded with the second lower die circular limiting groove 2201 of the lower die forming part 220, so that the upper and lower contours of the strip (not shown) can provide sufficient metal stretching allowance for the strip 300 to be extruded and filled into the rivet forming groove 2202, thereby effectively avoiding the structural feature of stretching and indentation of the rivet head away from the other end face of the rivet. This effectively ensures that the rivet after blanking has good mechanical strength and qualified appearance requirements.
[0033] It should be noted that in this embodiment, the preforming component 100 is located at one stamping station of strip 300 on the progressive die, while the forming component 200 is located at another stamping station of strip 300 after the preforming component 100. Therefore, it can be understood that after the strip 300 completes the stamping process at the previous stamping station, that is, the forming end of the upper die pre-stamping part 110 and the forming end of the lower die pre-stamping part 120 are aligned and pressed, so that the strip 300 forms an upper profile (not shown) and a lower profile respectively. The strip 300 then continues to advance along the X direction to align the upper and lower contours of the strip 300 (not shown) with the stamping station of the strip 300. This is achieved by aligning and pressing the upper contour of the upper die forming part 210 with the second lower die circular limiting groove 2201 of the lower die forming part 220. This causes the upper and lower contours of the strip to deform and be squeezed into the rivet forming groove 2202 to form the rivet.
[0034] It should be noted that the working principle of progressive die and the working principle of the 300-degree advance of the strip are well known to those skilled in the art, so they will not be elaborated on here.
[0035] like Figures 3 to 5 As shown, in one embodiment, the cross-sections of both the first pre-storage tank 1101 and the second pre-storage tank 1202 are U-shaped and tapering. In one embodiment, the opening of the second pre-storage tank 1202 is surrounded by an inclined transition surface 1210.
[0036] It is understood that the cross-sections of the first pre-storage groove 1101 and the second pre-storage groove 1202 are both U-shaped, which facilitates the separate processing and manufacturing of the forming end of the upper die pre-punch part 110 and the forming end of the lower die pre-punch part 120. At the same time, the inclined transition surface 1210 makes the outer surface of the formed strip lower profile (not shown) smoother, which is beneficial when the forming plane 2110 of the upper die forming part 210 and the second lower die circular limiting groove 2201 of the lower die forming part 220 are aligned and extruded, so that the strip lower profile (not shown) can be extruded and filled into the rivet forming groove 2202 more smoothly.
[0037] like Figures 1 to 5 As shown, in one embodiment, the volume of the first pre-storage tank 1101 is greater than the volume of the second pre-storage tank 1202. In one embodiment, the upper profile of the material strip (not shown) and the lower profile of the material strip (not shown) are arranged opposite to each other.
[0038] It is understandable that, since an upper profile (not shown) is formed in the first pre-storage tank 1101 and a lower profile (not shown) is formed in the second pre-storage tank 1202, and the volume of the first pre-storage tank 1101 is greater than the volume of the second pre-storage tank 1202, the forming volume of the upper profile (not shown) is greater than the forming volume of the lower profile (not shown); furthermore, the upper profile (not shown) and the lower profile (not shown) also... The two parts are arranged in a relatively opposite manner, so that when the shaping plane 2110 of the upper die shaping part 210 and the second lower die circular limiting groove 2201 of the lower die shaping part 220 are aligned to extrude the strip 300, the upper and lower contours of the strip (not shown) can provide sufficient metal stretching allowance for the strip 300 to be extruded and filled into the rivet forming groove 2202 to form the rivet. At the same time, it effectively avoids the structural feature of stretching and depression appearing when the rivet head is away from the other end face of the rivet.
[0039] like Figures 1 to 2 As shown, in one embodiment, the upper die pre-punching part 110 and the upper die shaping part 210 are both integrally formed structures. In one embodiment, the lower die pre-punching part 120 and the lower die shaping part 220 are both integrally formed structures.
[0040] It is understood that the upper die pre-punching part 110, the upper die shaping part 210, the lower die pre-punching part 120, and the lower die shaping part 220 are all integrally formed structures. This ensures that the upper die pre-punching part 110, the upper die shaping part 210, the lower die pre-punching part 120, and the lower die shaping part 220 have good structural strength support, thereby ensuring that the above-mentioned forming parts are not easily deformed during the alignment and extrusion process.
[0041] Please see Figures 1 to 5 This application also provides a progressive die, including the progressive die forming mechanism 10 for producing rivets as described in any of the above embodiments. The progressive die has an upper die pre-punch part, a lower die pre-punch part, an upper die forming part, and a lower die forming part. The progressive die also includes an upper die base (not shown) and a lower die base (not shown). The upper die pre-punch part and the upper die forming part are both fixedly installed on the upper die base (not shown), and the lower die pre-punch part and the lower die forming part are both fixedly installed on the lower die base (not shown).
[0042] In this embodiment, when the forming end of the upper die pre-punching part is aligned and pressed with the forming end of the lower die pre-punching part, the first pre-storage groove contains part of the deformed strip that has been compressed, thereby causing a strip upper profile to protrude from the top surface of the strip. Similarly, the second pre-storage groove also contains part of the deformed strip that has been compressed, thereby causing a strip lower profile to protrude from the bottom surface of the strip. Thus, when the forming plane of the upper die forming part is aligned and pressed with the second lower die circular limiting groove of the lower die forming part, the strip upper profile and the strip lower profile can provide sufficient metal stretching allowance for the strip to be extruded and filled into the rivet forming groove, thereby effectively avoiding the structural feature of stretching and depression on the other end face of the rivet head away from the rivet rod. This effectively ensures that the rivet after blanking has good mechanical strength and meets the qualified appearance requirements.
[0043] Compared with the prior art, the present invention has at least the following advantages:
[0044] When the forming end of the upper die pre-punching part is aligned and pressed with the forming end of the lower die pre-punching part, the first pre-storage groove contains part of the deformed strip material that has been compressed, resulting in a strip upper profile protruding from the top surface of the strip. Similarly, the second pre-storage groove also contains part of the deformed strip material that has been compressed, resulting in a strip lower profile protruding from the bottom surface of the strip. Then, when the forming plane of the upper die forming part is aligned and pressed with the second lower die circular limiting groove of the lower die forming part, the strip upper profile and strip lower profile can provide sufficient metal stretching allowance for the strip to be extruded and filled into the rivet forming groove. This effectively avoids the structural feature of stretching and indentation on the other end face of the rivet head away from the rivet rod, thus effectively ensuring that the rivet after blanking has good mechanical strength and meets the qualified appearance requirements.
[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A progressive die forming mechanism for producing rivets, characterized in that, include: The preforming component includes an upper die pre-punch part and a lower die pre-punch part; the forming end of the upper die pre-punch part is provided with a first pre-storage groove, and the forming end of the lower die pre-punch part is provided with a first lower die circular limiting groove and a second pre-storage groove, the first pre-storage groove and the first lower die circular limiting groove are arranged opposite to each other, and the first lower die circular limiting groove and the second pre-storage groove are connected. A forming assembly is provided, wherein the preforming assembly and the forming assembly are sequentially distributed in the forward direction of the strip; the forming assembly includes an upper die forming part and a lower die forming part; the forming end of the upper die forming part has a forming plane, and the forming end of the lower die forming part has a second lower die circular limiting groove and a rivet forming groove, the forming plane is opposite to the second lower die circular limiting groove, and the second lower die circular limiting groove is connected to the rivet forming groove; both the first pre-storage groove and the second pre-storage groove are used to accommodate part of the deformed strip under compression, so that an upper profile of the strip is formed in the first pre-storage groove, and a lower profile of the strip is formed in the second pre-storage groove.
2. The progressive die forming mechanism for producing rivets according to claim 1, characterized in that, The cross-sections of both the first and second pre-storage tanks are U-shaped and tapered.
3. The progressive die forming mechanism for producing rivets according to claim 1, characterized in that, The opening of the second pre-storage tank is surrounded by an inclined transition surface.
4. The progressive die forming mechanism for producing rivets according to claim 1, characterized in that, The volume of the first pre-storage tank is greater than the volume of the second pre-storage tank.
5. The progressive die forming mechanism for producing rivets according to claim 1, characterized in that, The upper contour body of the material strip and the lower contour body of the material strip are arranged opposite to each other.
6. The progressive die forming mechanism for producing rivets according to claim 1, characterized in that, Both the upper die pre-punching part and the upper die shaping part are integrally formed structures.
7. The progressive die forming mechanism for producing rivets according to claim 1, characterized in that, Both the lower die pre-punching part and the lower die shaping part are integrally formed structures.
8. A progressive die, characterized in that, The progressive die forming mechanism for producing rivets includes any one of claims 1 to 7, wherein the progressive die has an upper die pre-punch part, a lower die pre-punch part, an upper die forming part, and a lower die forming part, and the progressive die further includes an upper die base and a lower die base, wherein the upper die pre-punch part and the upper die forming part are both fixedly installed on the upper die base, and the lower die pre-punch part and the lower die forming part are both fixedly installed on the lower die base.