Rivet material belt with pre-pressing forming convex edge sharp corner structure
By designing a pre-formed convex edge sharp angle structure on the rivet tape, using the tap and die of the stamping mold to stretch and cut the cut zone and performing precise punching, the problem of collapse of the contour of the lower peripheral edge of the sealed rivet nail cap is solved, and the yield rate is improved.
Patent Information
- Application Number
- CN202422023959.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-08-20
AI Technical Summary
In the prior art, the lower peripheral edge profile of the nail cap sealing rivet is prone to collapse angles during stamping, resulting in low yield.
A rivet tape with a pre-formed convex edge angle structure is adopted. The punch and die of the stamping mold are stretched and cut into the lower peripheral edge of the nail cap, and the grooves to be punched and cut are accurately punched and cut into the grooves to be punched in the subsequent process.
It effectively avoids the influence of metal tensile stress on preformed sharp angles, ensures that the peripheral contour of the lower part of the nail cap is within the range of qualified sharp angle processing technical requirements, and improves the yield rate of the rivet tape.
Smart Images
Figure CN223250323U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rivet production, in particular to a rivet material strip with a pre-pressed convex edge and sharp corner structure. Background Art
[0002] The main function of the sealing rivets on the battery is to seal the power battery casing to prevent leakage and oxidation of the battery casing. At the same time, it has good corrosion resistance and mechanical strength, which can improve the performance and life of the battery.
[0003] Generally, sealing rivets are T-shaped precision structural parts mainly composed of a nail cap and a nail rod. Common production processes for sealing rivets are cold heading and stamping. Among them, in traditional technologies, such as Figure 1 As shown in A in the middle, the lower peripheral contour of the nail cap of the sealing rivet, which is usually directly blanked out in one go by a stamping die using a stamping forming process, is often prone to forming an obvious collapsed corner band (rounded corner band), making it difficult to ensure that the lower peripheral contour of the nail cap is within the qualified sharp corner processing technical requirements, thereby causing the sealing rivet to have a low yield rate in actual production. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a rivet strip with a pre-pressed convex edge sharp corner structure, which can make the lower peripheral edge profile of the nail cap within the qualified sharp corner processing technical requirements, thereby effectively improving the yield rate of sealing rivets in actual production.
[0005] The purpose of this utility model is achieved through the following technical solutions:
[0006] A rivet strip with a pre-pressed convex edge and sharp corner structure, comprising:
[0007] Punching material strip, with punching area;
[0008] A nail cap, the nail cap being connected to the punching strip through the punching area, the top surface of the nail cap being lower than the top surface of the punching strip to form a positioning groove to be punched, and the lower peripheral contour of the nail cap being convex from the bottom surface of the punching strip to form a preformed sharp corner;
[0009] A nail rod is connected to the bottom surface of the nail cap.
[0010] In one embodiment, the ratio of the depth of the alignment groove to be punched to the thickness of the nail cap is between 1 / 3 and 1 / 2.
[0011] In one embodiment, the thickness of the nail cap is 0.2 mm.
[0012] In one embodiment, the punched material strip is an integrally formed sheet structure.
[0013] In one embodiment, the cross-section of the nail rod is circular.
[0014] In one embodiment, the nail cap is fixedly connected to the nail rod, and the nail cap and the nail rod are both integrally formed structures.
[0015] In one embodiment, the nail cap is further formed with a first rounded transition surface, a second rounded transition surface, a third rounded transition surface and a fourth rounded transition surface, and the rounded radius R of the first rounded transition surface, the rounded radius R of the second rounded transition surface, the rounded radius R of the third rounded transition surface and the rounded radius R of the fourth rounded transition surface are all in the range of 0.2 mm to 0.3 mm.
[0016] Compared with the prior art, the present invention has at least the following advantages:
[0017] The punching area is stretched by the punch and die of the stamping die to form the overall contour of the nail cap, so that the lower peripheral contour of the nail cap first forms a pre-formed sharp corner structure, and at the same time, it is also convenient for the punching punch blade of the subsequent process of the stamping die to align with the to-be-punched alignment groove to complete the final precise blanking and blanking, so that the upper peripheral contour of the nail cap is completely separated from the punching strip. The to-be-punched alignment groove of the rivet strip with a pre-pressed convex sharp corner structure of the utility model can effectively reduce the metal tensile stress between the punching strip and the nail cap during the subsequent blanking process, thereby effectively avoiding the influence of the metal tensile stress on the pre-formed sharp corner, and further avoiding the trend of the lower peripheral contour of the nail cap forming a significant collapsed corner band, so that the pre-formed sharp corner is within the qualified sharp corner processing technical requirements, thereby improving the yield rate of the rivet strip with a pre-pressed convex sharp corner structure in actual production. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 This is a diagram showing a process change of directly blanking a punching strip in the prior art;
[0020] Figure 2 This is a structural schematic diagram of a finished rivet in one embodiment;
[0021] Figure 3 for Figure 2 Another structural schematic diagram of the finished rivet shown;
[0022] Figure 4 for Figure 2 The schematic diagram of the structure of the rivet strip with pre-pressed convex edge and sharp corner structure is shown;
[0023] Figure 5 for Figure 2 A schematic diagram of a partial half-section structure of a rivet strip with a pre-pressed convex edge and sharp corner structure is shown;
[0024] Figure 6 This is a photo of a rivet strip with a pre-formed convex edge and sharp corner structure in another embodiment;
[0025] Figure numerals: rivet strip 10 with pre-formed convex edge and sharp corner structure; punching strip 100; punching area 110; alignment groove to be punched 101; nail cap 200; pre-formed sharp corner 210; first rounded corner transition surface 220; second rounded corner transition surface 230; third rounded corner transition surface 240; fourth rounded corner transition surface 250; nail rod 300. DETAILED DESCRIPTION
[0026] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention 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 comprehensive understanding of the disclosure of the present invention.
[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0029] The present disclosure provides a rivet strip with a pre-formed convex corner structure, comprising a punched strip, a nut, and a shank. The punched strip is provided with a punching area; the nut is connected to the punched strip via the punching area. The top surface of the nut is lower than the top surface of the punched strip to form a recess for alignment to be punched. The lower peripheral edge of the nut is convex from the bottom surface of the punched strip, forming a pre-formed corner. The shank is connected to the bottom surface of the nut.
[0030] See also Figures 1 to 5 In order to better understand the rivet strip 10 with a pre-pressed convex edge and sharp corner structure of the present application, the rivet strip 10 with a pre-pressed convex edge and sharp corner structure is further explained below:
[0031] A rivet strip 10 with a pre-formed convex corner structure in one embodiment includes a punched strip 100, a nut 200, and a shank 300. The punched strip 100 is provided with a punching area 110; the nut 200 is connected to the punched strip 100 via the punching area 110. The top surface of the nut 200 is lower than the top surface of the punched strip 100 to form a to-be-punched alignment groove 101. The lower peripheral contour of the nut 200 is convex from the bottom surface of the punched strip 100, forming a pre-formed corner 210. The shank 300 is connected to the bottom surface of the nut 200.
[0032] In this embodiment, the punching area 110 is stretched by the punch and die of the stamping die to form the overall outline of the nail cap 200, so that the lower peripheral contour of the nail cap 200 first forms a pre-formed sharp corner 210 structure, and at the same time, it is also convenient for the punching punch blade of the subsequent process of the stamping die to align with the to-be-punched positioning groove 101 to complete the final precise blanking, so that the upper peripheral contour of the nail cap 200 is completely separated from the punching material strip 100. The to-be-punched alignment groove 101 of the rivet strip 10 with a pre-pressed convex sharp corner structure of the present invention can effectively reduce the metal tensile stress between the punched strip 100 and the nail cap 200 during the subsequent punching and blanking process, thereby effectively avoiding the influence of the metal tensile stress on the pre-formed sharp corner 210, and further avoiding the tendency of the lower peripheral contour of the nail cap 200 to form a significant collapsed corner band, so that the pre-formed sharp corner 210 is within the qualified sharp corner processing technical requirements, thereby improving the yield rate of the rivet strip 10 with a pre-pressed convex sharp corner structure in actual production.
[0033] It is necessary to add that, if Figure 4 The X arrow in the middle indicates the direction in which the punching strip 100 moves on the stamping die; at the same time, the specific shape of the punching strip 100 is not limited to the following. Figure 4In order to realize the long strip shape in the punching strip 100, the punching strip 100 is also provided with corresponding avoidance holes (not shown) and positioning holes (not shown), etc. In this embodiment, the punching strip 100 is only used to show the position relationship of the punching area 110 relative to the moving direction of the punching strip 100 on the stamping die; specifically, a blanking area (not shown) is also provided on the punching strip 100 behind the alignment groove 101 to be punched.
[0034] It should also be noted that the alignment groove 101 to be punched is formed by the punch and die of the corresponding station on the stamping die through a stretching process; and the punching area 110 is the vertical projection surface contour of the punch edge contour and the die edge contour of the corresponding station on the stamping die.
[0035] like Figure 4 and Figure 5 As shown, in one embodiment, the ratio of the depth of the to-be-punched alignment groove 101 to the thickness of the nail cap 200 is in a range of 1 / 3 to 1 / 2. In one embodiment, the thickness of the nail cap 200 is 0.2 mm.
[0036] It can be understood that in this embodiment, the depth of the alignment groove 101 to be punched should not be too deep or too shallow, that is, the ratio of the depth of the alignment groove 101 to the thickness of the nail cap 200 is preferably between 1 / 3 and 1 / 2, so that the upper peripheral contour of the nail cap 200 can still maintain a good structural strength connection with the punching material strip 100.
[0037] At the same time, the peripheral contour of the alignment groove 101 to be punched can be used to guide the punch blade of the subsequent stamping die, which is beneficial to the precise punching and blanking of the nail cap 200 by the punch blade, and effectively reduces the metal tensile stress between the punching strip 100 and the nail cap 200 during the punching and blanking process, thereby effectively avoiding the influence of the metal tensile stress on the preformed sharp corner 210, and further avoiding the tendency of the lower peripheral contour of the nail cap 200 to form an obvious collapsed angle band, so that the preformed sharp corner 210 is within the qualified sharp corner processing technical requirements, thereby improving the yield rate of the rivet strip 10 with a pre-pressed convex sharp corner structure in actual production.
[0038] like Figure 4 As shown, in one embodiment, the punching strip 100 is an integrally formed thin sheet structure. It can be understood that the punching strip 100 with an integrally formed thin sheet structure has a better sustainable punching effect.
[0039] like Figure 1 and Figure 2 As shown, in one embodiment, the cross-section of the nail rod 300 is circular.
[0040] like Figures 2 to 5As shown, in one embodiment, the nail cap 200 is fixedly connected to the nail rod 300, and the nail cap 200 and the nail rod 300 are both integrally formed structures.
[0041] It can be understood that the nail cap 200 is fixedly connected to the nail rod 300, and the nail cap 200 and the nail rod 300 are both integrally formed structures, that is, the rivet strip 10 with a pre-pressed convex edge and sharp corner structure is an integrally formed structure, so that the rivet strip 10 with a pre-pressed convex edge and sharp corner structure has good mechanical structure connection strength, so that the rivet strip 10 with a pre-pressed convex edge and sharp corner structure can be better riveted and sealed on the power battery casing to prevent leakage and oxidation of the battery casing.
[0042] like Figure 2 and Figure 3 As shown, in one embodiment, the nail cap 200 is further formed with a first rounded transition surface 220, a second rounded transition surface 230, a third rounded transition surface 240 and a fourth rounded transition surface 250, and the rounded radius R of the first rounded transition surface 220, the rounded radius R of the second rounded transition surface 230, the rounded radius R of the third rounded transition surface 240 and the rounded radius R of the fourth rounded transition surface 250 are all in the range of 0.2 mm to 0.3 mm.
[0043] It can be understood that by providing the first rounded transition surface 220, the second rounded transition surface 230, the third rounded transition surface 240 and the fourth rounded transition surface 250 on the nail cap 200, the punch cutting edge and the die cutting edge on the corresponding stamping die avoid the design of sharp corners, thereby effectively reducing the probability of misalignment and collision between the punch cutting edge and the die cutting edge, thereby ensuring the sustainable operation of the stamping die.
[0044] Compared with the prior art, the present invention has at least the following advantages:
[0045] In this embodiment, the punching area is stretched by the punch and die of the stamping die to form the overall contour of the nail cap, so that the lower peripheral contour of the nail cap first forms a pre-formed sharp corner structure, and at the same time, it is convenient for the punching punch blade of the subsequent process of the stamping die to align with the to-be-punched alignment groove to complete the final precise blanking and blanking, so that the upper peripheral contour of the nail cap is completely separated from the punching strip. The to-be-punched alignment groove of the rivet strip with a pre-pressed convex sharp corner structure of the utility model can effectively reduce the metal tensile stress between the punching strip and the nail cap during the subsequent blanking process, thereby effectively avoiding the influence of the metal tensile stress on the pre-formed sharp corner, and further avoiding the trend of the lower peripheral contour of the nail cap forming a significant collapsed corner band, so that the pre-formed sharp corner is within the qualified sharp corner processing technical requirements, thereby improving the yield rate of the rivet strip with a pre-pressed convex sharp corner structure in actual production.
[0046] The above-described embodiments merely represent several implementations of the present invention. 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 a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.
Claims
1. A rivet strip with a pre-formed convex edge and sharp corner structure, characterized in that: include: Punching material strip, with punching area; A nail cap, the nail cap being connected to the punched material strip through the punching area, the top surface of the nail cap being lower than the top surface of the punched material strip to form a positioning groove to be punched, and the lower peripheral contour of the nail cap being convex from the bottom surface of the punched material strip, so that the lower peripheral contour of the nail cap forms a preformed sharp corner; A nail rod is connected to the bottom surface of the nail cap.
2. The rivet strip with pre-pressed convex edge and sharp corner structure according to claim 1, characterized in that: The ratio of the depth of the alignment groove to be punched to the thickness of the nail cap is between 1 / 3 and 1 / 2.
3. The rivet strip with pre-pressed convex edge and sharp corner structure according to claim 1, characterized in that: The thickness of the nail cap is 0.2 mm.
4. The rivet strip with pre-pressed convex edge and sharp corner structure according to claim 1, characterized in that: The punched material strip is an integrally formed thin sheet structure.
5. The rivet strip with pre-pressed convex edge and sharp corner structure according to claim 1, characterized in that: The cross section of the nail rod is circular.
6. The rivet strip with pre-pressed convex edge and sharp corner structure according to claim 1, characterized in that: The nail cap is fixedly connected to the nail rod, and both the nail cap and the nail rod are integrally formed structures.
7. The rivet strip with pre-pressed convex edge and sharp corner structure according to claim 1, characterized in that: The nail cap also forms a first rounded corner transition surface, a second rounded corner transition surface, a third rounded corner transition surface and a fourth rounded corner transition surface, and the rounded corner radius R of the first rounded corner transition surface, the rounded corner radius R of the second rounded corner transition surface, the rounded corner radius R of the third rounded corner transition surface and the rounded corner radius R of the fourth rounded corner transition surface are all between 0.2mm and 0.3mm.