In-mold silver inlay stamping mechanism and mold

Abstract

The utility model discloses a kind of in-mold silver sheet inlay stamping mechanism and mould, including lower mould plate, upper surface can hold copper bar;Upper mould plate, lower surface is equipped with the triangular rib of being able to extrude copper bar, trapezoidal rib, upper mould plate includes several replaceable and different specifications upper mould plate;Among them, upper mould plate includes first upper mould plate, first upper mould plate is equipped with first triangular rib, first trapezoidal rib, the cross-sectional shape of first triangular rib, first trapezoidal rib is respectively triangle, trapezoidal, the space between first triangular rib and first trapezoidal rib can be extruded on copper bar Ladder-shaped extrusion part is stamped out;Upper mould plate includes third upper mould plate, third upper mould plate is equipped with third triangular rib, its cross-sectional shape is triangle, the vertex angle number of third triangular rib is greater than the vertex angle number of first triangular rib;Upper mould plate includes fifth upper mould plate, fifth upper mould plate is equipped with curved pit. By step-by-step progressive stamping and replaceable template design, riveting effect is improved using the utility model.

Description

Technical Field

[0001] This utility model relates to the field of stamping dies, specifically to an in-mold silver sheet inlay stamping mechanism and die. Background Technology

[0002] In the field of conductive component manufacturing, riveting copper busbars to silver sheets is a process that improves conductivity and reduces contact resistance, and is widely used in power equipment, new energy devices, and other scenarios. Existing technologies often employ simple stamping dies for one-time riveting, directly applying pressure with a punch to locally deform the copper busbar, thereby fixing the silver sheet to the copper busbar surface. However, this one-time stamping riveting method has significant drawbacks. For example, the rapid deformation process of the copper busbar can lead to stress concentration and uneven deformation, and gaps or stress relaxation can easily occur at the contact surface between the silver sheet and the copper busbar, causing problems such as insufficient riveting strength and poor connection stability. Furthermore, with long-term use, the silver sheet may loosen or detach, affecting the reliability and service life of the conductive component. Utility Model Content

[0003] The problem to be solved by this utility model is to provide an in-mold silver sheet inlay stamping mechanism and mold.

[0004] To solve the above problems, on the one hand, this utility model provides an in-mold silver sheet inlay stamping mechanism. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows: An in-mold silver sheet inlay stamping mechanism includes: a lower template, the upper surface of which can support a copper busbar; an upper template, the lower surface of which has triangular edges and / or trapezoidal edges capable of extruding the copper busbar, the upper template including a plurality of replaceable upper templates of different specifications; wherein, the upper template includes a first upper template, the first upper template having a first triangular edge and a first trapezoidal edge, the cross-sectional shape of the first triangular edge being triangular, the cross-sectional shape of the first trapezoidal edge being trapezoidal, the space between the first triangular edge and the first trapezoidal edge being able to stamp a trapezoidal extrusion part on the copper busbar; the upper template includes a third upper template, the third upper template having a third triangular edge, the cross-sectional shape of the third triangular edge being triangular, the vertex angle of the third triangular edge being greater than the vertex angle of the first triangular edge; the upper template includes a fifth upper template, the fifth upper template having a curved recess, the curved recess being able to stamp a curved protrusion at the top of the trapezoidal extrusion part.

[0005] As a further improvement of this utility model, the space between the first triangular edge and the first trapezoidal edge of the first upper template forms a first trapezoidal groove; the upper template includes a second upper template, the second upper template having a second triangular edge and a second trapezoidal edge, the vertex angle of the second triangular edge being equal to the vertex angle of the first triangular edge, and the top surface width of the second trapezoidal edge being equal to the top surface width of the first trapezoidal edge; the space between the second triangular edge and the second trapezoidal edge forms a second trapezoidal groove, and the depth of the second trapezoidal groove is greater than the depth of the first trapezoidal groove.

[0006] As a further improvement of this utility model, the upper template includes a fourth upper template, the fourth upper template having a fourth triangular edge, the cross-sectional shape of the fourth triangular edge being a triangle, and the vertex angle of the fourth triangular edge being greater than the vertex angle of the third triangular edge.

[0007] As a further improvement of this utility model, the difference between the vertex angle of the fourth triangular edge and the vertex angle of the third triangular edge is not greater than 10°, and the difference between the vertex angle of the third triangular edge and the vertex angle of the first triangular edge is not greater than 10°.

[0008] As a further improvement of this utility model, the third upper template has a pair of third triangular edges, the fourth upper template has a pair of fourth triangular edges, the slope of the two third triangular edges facing each other is less than the slope of the two third triangular edges facing each other, and the slope of the two fourth triangular edges facing each other is less than the slope of the two fourth triangular edges facing each other.

[0009] As a further improvement of this utility model, the triangular edges, trapezoidal edges, and curved surface pits all appear in pairs, and the distance between two triangular edges on the same upper template is greater than the distance between two trapezoidal edges on the same upper template.

[0010] As a further improvement of this utility model, the cross-sectional profile of the trapezoidal edge is a right trapezoid, and the opposing faces of the two trapezoidal edges on the same upper template correspond to the inclined waist of the right trapezoidal cross-sectional shape of the trapezoidal edge.

[0011] As a further improvement of this utility model, the inner wall of the curved surface pit is a concave surface, the opening width of the curved surface pit is greater than the depth of the curved surface pit, and the distance between two curved surface pits is equal to the distance between two trapezoidal edges.

[0012] As a further improvement of this utility model, the copper busbar is a red copper plate with a thickness of 3mm.

[0013] On the other hand, a mold includes the aforementioned in-mold silver sheet inlay stamping mechanism.

[0014] The beneficial technical effects of using the in-mold silver sheet inlay stamping mechanism of this application are: By setting up replaceable upper templates of different specifications, the copper busbars can be stamped in a step-by-step manner, avoiding the stress concentration problem caused by one-time stamping, making the shape of the copper busbars more uniform, and reducing material damage and forming defects.

[0015] The triangular and trapezoidal edges of the first upper template work together to form a trapezoidal extrusion section. The triangular edges with larger apex angles of the third upper template optimize the forming shape of the extrusion section. The curved concave pits of the fifth upper template process the curved convex bulge. The multi-stage forming process makes the bonding surface between the silver sheet and the copper busbar tighter, effectively improving the riveting strength and connection stability.

[0016] The replaceable upper template design allows for adaptation to different molding requirements without the need for a complete mold replacement, enhancing the adaptability and practicality of the mechanism and reducing production adjustment costs for different products. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the first stage of one embodiment of the in-mold silver sheet inlay stamping mechanism of this utility model; Figure 2 This is a schematic diagram of the second stage of one embodiment of the in-mold silver sheet inlay stamping mechanism of this utility model; Figure 3 This is a schematic diagram of the third stage of one embodiment of the in-mold silver sheet inlay stamping mechanism of this utility model; Figure 4 This is a schematic diagram of the fourth stage of one embodiment of the in-mold silver sheet inlay stamping mechanism of this utility model; Figure 5 This is a schematic diagram of the fifth stage of one embodiment of the in-mold silver sheet inlay stamping mechanism of this utility model; Figure 6 This is a structural schematic diagram of one embodiment of the mold of this utility model.

[0019] 1-Lower template; 2-Copper busbar; 201-V-groove; 202-Trapezoidal recess; 203-Trapezoidal extrusion section; 204-First lateral extension hook; 205-Second lateral extension hook; 206-Curved convex hull; 3-First upper template; 301-First triangular edge; 302-First trapezoidal edge; 303-First trapezoidal groove; 4-Second upper template; 401-Second triangular edge; 402-Second trapezoidal edge; 403-Second trapezoidal groove; 5-Third upper template; 501-Third triangular edge; 502-First clearance pit; 6-Fourth upper template; 601-Fourth triangular edge; 602-Second clearance pit; 7-Fifth upper template; 701-Curved recess; 8-Silver sheet; 801-Flattened section; 802-Hook-shaped section. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments: To achieve the purpose of this utility model, please refer to Figures 1 to 5 An in-mold silver sheet inlay stamping mechanism includes: a lower template 1, the upper surface of which can support a copper busbar 2. An upper template, the lower surface of which has triangular edges and / or trapezoidal edges capable of extruding the copper busbar 2, and the upper template includes several replaceable upper templates of different specifications. The upper template includes a first upper template 3, which has a first triangular edge 301 and a first trapezoidal edge 302. The cross-sectional shape of the first triangular edge 301 is triangular, and the cross-sectional shape of the first trapezoidal edge 302 is trapezoidal. The space between the first triangular edge 301 and the first trapezoidal edge 302 can be used to stamp a trapezoidal extrusion part 203 onto the copper busbar 2. The upper template also includes a third upper template 5, which has a third triangular edge 501, the cross-sectional shape of which is triangular, and the vertex angle of the third triangular edge 501 is greater than the vertex angle of the first triangular edge 301. The upper template also includes a fifth upper template 7, which has curved recesses 701, such as... Figure 5 As shown, the curved recess 701 can punch a curved protrusion 206 at the top of the trapezoidal extrusion section 203.

[0021] The triangular edge can stamp a V-shaped groove 201 on the copper busbar 2, and the trapezoidal edge can stamp a trapezoidal recess 202 on the copper busbar 2. The trapezoidal extrusion part 203 is formed when a part of the material of the copper busbar 2 is squeezed and displaced during the stamping of the V-shaped groove 201 and the trapezoidal recess 202.

[0022] Figures 1 to 5 This also corresponds exactly to the time sequence of the processing steps.

[0023] The beneficial effects of adopting the above technical solution are: The copper busbar 2 is clamped from both ends using a lower mold 1 and several upper molds that are replaced sequentially. The upper molds, which are replaced according to the process, have a gradually changing surface shape. The upper mold first stamps the copper busbar 2, stamping out concave and convex parts. The material removed from the concave parts is squeezed and filled into the convex parts. Then, the next upper mold continues to raise the height of the convex parts. After the two ends of the silver sheet 8 are inserted into the concave parts, the next upper mold will squeeze the convex parts to one side, that is, make the trapezoidal extrusion part 203 tilt to one side. Then, one side of the trapezoidal extrusion part 203 firmly presses down on the two ends of the silver sheet 8. Finally, the top of the trapezoidal extrusion part 203 is compacted to form a curved convex bump 206, further compacting the silver sheet 8 and rounding the top of the trapezoidal extrusion part 203.

[0024] This product is suitable for stamping dies used in automotive hardware, where red copper is used to rivet silver sheets. The volume of the silver sheet (8) and copper busbar (2) can be ignored. It can be used for any part that requires riveting, saving the labor cost of the secondary stamping and riveting process. The forming principle is easy to understand and highly practical.

[0025] In other embodiments of this utility model, the space between the first triangular edge 301 and the first trapezoidal edge 302 of the first upper template 3 forms a first trapezoidal groove 303. The upper template also includes a second upper template 4, which has a second triangular edge 401 and a second trapezoidal edge 402, such as... Figure 1 and Figure 2 As shown, the vertex angle of the second triangular edge 401 is equal to the vertex angle of the first triangular edge 301, and the top surface width of the second trapezoidal edge 402 is equal to the top surface width of the first trapezoidal edge 302. The space between the second triangular edge 401 and the second trapezoidal edge 402 forms a second trapezoidal groove 403, and the depth of the second trapezoidal groove 403 is greater than the depth of the first trapezoidal groove 303.

[0026] The silver sheet 8 includes a flat section 801 located in the middle of itself, which is also the main body of the silver sheet 8. The two sides of the flat section 801 are connected at an angle to hook-shaped sections 802, which can be assembled with trapezoidal recesses 202.

[0027] The beneficial effects of adopting the above technical solution are as follows: by setting a first upper template 3 and a second upper template 4 with trapezoidal grooves of different depths, it achieves graded forming of the trapezoidal recess 202 and the trapezoidal extrusion section 203 on the copper busbar 2. The second trapezoidal groove 403 is deeper than the first trapezoidal groove 303, which allows the second upper template 4 to perform deeper extrusion and shaping on the initially formed structure, making the flow and deformation of the copper busbar 2 material more complete and controllable, thereby providing a more precise and stable basic structure for the subsequent embedding of the hook-shaped section 802 of the silver sheet 8.

[0028] In some other embodiments of this utility model, the upper template further includes a fourth upper template 6, which has a fourth triangular edge 601. The cross-sectional shape of the fourth triangular edge 601 is triangular, and the vertex angle of the fourth triangular edge 601 is greater than that of the third triangular edge 501.

[0029] like Figure 3 As shown, after being squeezed by the third triangular ridge 501, the trapezoidal extrusion part 203 is squeezed and tilted to one side because the apex angle of the third triangular ridge 501 is large. Also, because one side of the trapezoidal extrusion part 203 is blocked by the silver sheet 8, the top of the trapezoidal extrusion part 203 is squeezed by the upper template. However, the copper busbar 2 material always needs to find a vent to deform, so at this time the trapezoidal extrusion part 203 will extend a first lateral extension hook 204 on one side of its top.

[0030] Similarly, such as Figure 4 As shown, the second lateral extension hook 205 is also generated based on a similar principle. The second lateral extension hook 205 is generated based on the first lateral extension hook 204, and the lateral extension distance of the second lateral extension hook 205 is greater than the lateral extension distance of the first lateral extension hook 204.

[0031] According to the actual process, the upper template is as follows: Figure 1 The first template 3 shown is replaced sequentially with the following: Figure 2 The second template 4 shown is as follows: Figure 3 The third template shown is 5, as follows. Figure 4 The fourth template shown is 6, as follows. Figure 5 The fifth template shown is 7.

[0032] The beneficial effect of adopting the above technical solution is that the fourth upper template 6 is equivalent to adding another level between the third upper template 5 and the fifth upper template 7, which makes the skew deformation of the trapezoidal extrusion part 203 of the copper busbar 2 in each level smaller.

[0033] Following the third upper mold 5, a fourth upper mold 6 with a larger apex angle is introduced, forming a sequence of progressively increasing apex angles from the first triangular ridge 301 to the third triangular ridge 501 and then to the fourth triangular ridge 601. This design breaks down the skewed deformation process of the trapezoidal extrusion section 203 into more and smoother steps, further reducing the internal stress of the material in each stamping step. This makes the final formation of the first lateral extension hook 204 and the second lateral extension hook 205 of the trapezoidal extrusion section 203 smoother and results in higher molding quality.

[0034] In some other embodiments of this utility model, the difference between the vertex angle of the fourth triangular edge 601 and the vertex angle of the third triangular edge 501 is no greater than 10°, and the difference between the vertex angle of the third triangular edge 501 and the vertex angle of the first triangular edge 301 is no greater than 10°.

[0035] In some other embodiments of this utility model, the third upper template 5 has a pair of third triangular edges 501, and the fourth upper template 6 has a pair of fourth triangular edges 601. The slope of the facing surfaces of the two third triangular edges 501 is less than the slope of the facing surfaces of the two third triangular edges 501, and the slope of the facing surfaces of the two fourth triangular edges 601 is less than the slope of the facing surfaces of the two fourth triangular edges 601.

[0036] The space between a pair of third triangular edges 501 forms a first clearance pit 502 with increased depth, and the space between a pair of fourth triangular edges 601 forms a second clearance pit 602 with increased depth. The bottom surfaces of the first clearance pit 502 and the second clearance pit 602 can squeeze the top of the trapezoidal extrusion part 203, thereby also forcing the formation of the first lateral extension hook 204 and the second lateral extension hook 205.

[0037] The beneficial effects of adopting the above technical solution are: it limits the difference in the apex angle of the triangular edges used in adjacent upper die plates to no more than 10°. This quantitative limitation ensures a smooth transition of deformation parameters between each stamping stage, prevents material tearing or forming defects caused by abrupt angle changes, and guarantees the continuity and reliability of the entire process chain from initial extrusion to final forming, allowing the advantages of progressive stamping to be stably realized.

[0038] In some other embodiments of this utility model, triangular edges, trapezoidal edges, and curved recesses 701 appear in pairs, and the distance between two triangular edges on the same upper template is greater than the distance between two trapezoidal edges on the same upper template.

[0039] The beneficial effects of adopting the above technical solution are: It clarifies the slope design of the triangular edges on the third upper mold 5 and the fourth upper mold 6, meaning the slope of the facing surfaces is less than the slope of the facing surfaces. The avoidance pits formed by this asymmetrical structure, such as the first avoidance pit 502 and the second avoidance pit 602, can more effectively guide and accommodate the material flow at the top of the trapezoidal extrusion section 203 during stamping, and apply directional pressure, thereby efficiently promoting the lateral extension of the first lateral extension hook 204 and the second lateral extension hook 205, ensuring that the hooks can fully press the silver sheet 8.

[0040] In some other embodiments of this utility model, the cross-sectional profile of the trapezoidal edge is a right trapezoid, and the opposing faces of two trapezoidal edges on the same upper template correspond to the inclined waist of the right trapezoidal cross-sectional shape of the trapezoidal edge.

[0041] The beneficial effects of adopting the above technical solution are: it stipulates that each extrusion edge and recess appears in pairs, and the distance between two triangular edges on the same template is greater than the distance between two trapezoidal edges. This layout corresponds to the symmetry of the structure to be formed on the copper busbar 2, ensuring balanced force. The spacing difference precisely matches the positional relationship between the V-groove 201 and the trapezoidal recess 202, allowing the material to orderly gather towards the center during stamping to form the trapezoidal extrusion section 203, avoiding structural interference and ensuring forming accuracy.

[0042] like Figure 5 As shown, in some other embodiments of this utility model, the inner wall of the curved recess 701 is a concave surface, the opening width of the curved recess 701 is greater than the depth of the curved recess 701, and the distance between two curved recesses 701 is equal to the distance between two trapezoidal edges.

[0043] The beneficial effect of adopting the above technical solution is that the facing surfaces of the two trapezoidal edges are inclined. This design allows the stamped trapezoidal recess 202 to have one vertical wall and one inclined wall. The vertical wall can provide a stable support surface for the hook-shaped segment 802 of the silver sheet 8, while the inclined wall facilitates the insertion and fitting of the hook-shaped segment 802, optimizing the assembly and snap-fit ​​effect of the silver sheet 8 and enhancing the mechanical locking force of the riveting.

[0044] In some other embodiments of this utility model, the copper busbar 2 is a red copper plate with a thickness of 3mm.

[0045] The beneficial effects of adopting the above technical solution are: it clarifies that the copper busbar 2 uses a 3mm thick copper plate. This limitation combines the technical solution with the specific application material. The good ductility of copper is very suitable for this type of progressive stamping process, while the 3mm thickness provides the necessary material basis for forming the trapezoidal extrusion section 203, the lateral extension hook, and the curved protrusion 206 with sufficient volume, ensuring that the final riveted structure has sufficient strength and volume to achieve a reliable connection.

[0046] like Figure 6 As shown, a mold includes an in-mold silver sheet inserting and stamping mechanism as described above. A pneumatic feeder delivers the silver sheet 8 to a designated position within the mold, where a limiting component holds the silver sheet 8 in place. The silver sheet 8 is then pressed down by a punch press to force it into the product. The mold closes during the stamping stroke to complete the inserting action.

[0047] The beneficial effects of adopting the above technical solution are: all the technical advantages of step-by-step progressive stamping, precise forming, enhanced connection strength and stability can be realized in a complete mold device, which is convenient for integration with equipment such as punch presses, realizes the automation and efficiency of silver sheet inlay process, and improves production efficiency and product consistency.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An in-mold silver sheet inlay stamping mechanism, characterized in that, include: The lower template has an upper surface that can support the copper busbar; The upper template has triangular and / or trapezoidal edges on its lower surface that are capable of extruding copper busbars. The upper template includes several replaceable upper templates of different specifications. The upper template includes a first upper template, which has a first triangular edge and a first trapezoidal edge. The cross-sectional shape of the first triangular edge is triangular, and the cross-sectional shape of the first trapezoidal edge is trapezoidal. The space between the first triangular edge and the first trapezoidal edge can be used to stamp a trapezoidal extrusion part on the copper busbar. The upper template includes a third upper template, which has a third triangular edge. The cross-sectional shape of the third triangular edge is a triangle, and the vertex angle of the third triangular edge is greater than that of the first triangular edge. The upper template includes a fifth upper template, which has a curved recess that can punch a curved protrusion at the top of the trapezoidal extrusion section.

2. The in-mold silver sheet inlay stamping mechanism according to claim 1, characterized in that: The space between the first triangular edge and the first trapezoidal edge of the first upper template forms a first trapezoidal groove; The upper template includes a second upper template, which has a second triangular edge and a second trapezoidal edge. The vertex angle of the second triangular edge is equal to the vertex angle of the first triangular edge, and the top surface width of the second trapezoidal edge is equal to the top surface width of the first trapezoidal edge. The space between the second triangular edge and the second trapezoidal edge forms a second trapezoidal groove, and the depth of the second trapezoidal groove is greater than the depth of the first trapezoidal groove.

3. The in-mold silver sheet inlay stamping mechanism according to claim 2, characterized in that: The upper template includes a fourth upper template, which has a fourth triangular edge. The cross-sectional shape of the fourth triangular edge is a triangle, and the vertex angle of the fourth triangular edge is greater than that of the third triangular edge.

4. The in-mold silver sheet inlay stamping mechanism according to claim 3, characterized in that: The difference between the vertex angle of the fourth triangular edge and the vertex angle of the third triangular edge is no greater than 10°, and the difference between the vertex angle of the third triangular edge and the vertex angle of the first triangular edge is no greater than 10°.

5. The in-mold silver sheet inlay stamping mechanism according to claim 4, characterized in that: The third upper template has a pair of third triangular edges, and the fourth upper template has a pair of fourth triangular edges. The slope of the two third triangular edges facing each other is less than the slope of the two third triangular edges facing each other, and the slope of the two fourth triangular edges facing each other is less than the slope of the two fourth triangular edges facing each other.

6. The in-mold silver sheet inlay stamping mechanism according to claim 1, characterized in that: The triangular edges, trapezoidal edges, and curved recesses all appear in pairs, and the distance between two triangular edges on the same upper template is greater than the distance between two trapezoidal edges on the same upper template.

7. The in-mold silver sheet inlay stamping mechanism according to claim 6, characterized in that: The cross-sectional profile of the trapezoidal edge is a right trapezoid, and the opposing faces of the two trapezoidal edges on the same upper template correspond to the oblique waist of the right trapezoidal cross-sectional shape of the trapezoidal edge.

8. The in-mold silver sheet inlay stamping mechanism according to claim 1, characterized in that: The inner wall of the curved surface pit is a concave surface, the opening width of the curved surface pit is greater than the depth of the curved surface pit, and the distance between two curved surface pits is equal to the distance between two trapezoidal edges.

9. The in-mold silver sheet inlay stamping mechanism according to claim 1, characterized in that: The copper busbar is a 3mm thick copper plate.

10. A mold, characterized in that: Includes the in-mold silver sheet inlay stamping mechanism as described in any one of claims 1 to 9.

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