Electric connection support composite punch forming device and method and electric connection support thereof

Abstract

The invention discloses a composite punch forming device and method for an electric connection support and the electric connection support thereof, belongs to the technical field of connection supports for circuits, and is used for machining the electric connection support with high precision and high efficiency. According to the device, the upper die set and the lower die set are tightly matched, and the punching procedures of punching, trimming, bending, blanking and the like are sequentially completed through the punching male die, the trimming male die, the bending male die, the blanking male die and the like. The device adopts a guide pillar mechanism to guide and pre-position, so that the accurate centering of the upper module and the lower module is ensured. And the floating material guide pin is matched with the spring, so that accurate positioning and conveying of the material belt are realized. Stamping belongs to cold machining, the problems of surface corrosion and wettability are avoided, meanwhile, the design of multiple rows of concave-convex dies is adopted, multiple workpieces can be produced through one-time stamping, the production efficiency is greatly improved, the product machining period is shortened, and the production cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of connection brackets for circuits, and in particular relates to a composite stamping forming device and method for an electric connection bracket and the electric connection bracket. Background Art

[0002] Electrical connection brackets (mainly made of AgCu45 strip or copper strip) are mainly used for electrical connection between substrates, substrates and tube legs, substrates and leads, and tube legs in DC / DC circuits. Common shapes of electrical connection brackets include flat, L-shaped and special-shaped. The products involved include DC / DC circuits, EMI filters and SSPC solid-state power storage.

[0003] The electrical connection bracket has small dimensions, thin material thickness (0.2mm) and high dimensional accuracy requirements (±0.1mm). Traditional electrical connection brackets are processed by cutting the shape - punching - bending, that is, the bracket shape is processed by wire cutting, and the bracket with hole features is punched. After completion, the bending operation is performed on the bending mold.

[0004] Wire cutting belongs to the category of special processing, which relies on the high temperature melted metal generated by arc discharge to achieve the effect of cutting workpieces. When using the wire cutting process, for brackets with hole features, due to the separation of the shape processing and the punching process, it is easy to cause problems such as hole position offset and inconsistent size features, and the gap between the hole feature and the wall is small (the minimum is about 0.4mm). When the deviation is large, it is easy to cause the hole and the shape to penetrate, resulting in the scrapping of the bracket. During the wire cutting process, the silver-copper alloy / copper alloy material is in contact with the cutting fluid. During the cutting process, the liquid is easy to contaminate and corrode the surface of the bracket. At the same time, due to the discharge process accompanied by wire cutting, there is a heat effect around the cutting surface, which is easy to be oxidized. After the bracket is processed, there are problems such as surface corrosion and poor wettability, which affect the subsequent tinning process. After the shaping is completed, micro cracks or copper exposure occasionally appear on the bending surface of the bracket. For silver-copper alloy materials, the moving speed of the wire cutting equipment is approximately 0.5mm / s, and the punching and bending processes are processed separately, with low production efficiency and long cycle. Therefore, it is necessary to find a high-precision, high-efficiency processing method with little impact on the surface of the electrical connection bracket. Summary of the invention

[0005] The present invention provides an electrical connection bracket composite stamping forming device and method and the electrical connection bracket thereof, so as to solve the technical problems existing in the prior art in the processing of the traditional electrical connection bracket, such as low precision, easy surface corrosion, poor wettability and low processing efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A composite stamping forming device for an electrical connection bracket comprises an upper die set and a lower die set, a material strip is placed between the upper die set and the lower die set, the upper die set comprises an upper pad, a positioning punch, a punching die, a trimming punch, a positioning needle, a bending punch and a blanking punch are sequentially mounted on the upper pad, the lower die set comprises a lower template, a first positioning punch clearance hole, a first punching discharge hole, a first trimming discharge hole, a positioning needle clearance hole, a bending hole and a first blanking hole are sequentially arranged on the lower template; the positioning punch cooperates with the first positioning punch clearance hole, the punching die cooperates with the first punching discharge hole, the trimming punch cooperates with the first trimming discharge hole, the positioning needle cooperates with the positioning needle clearance hole, the bending punch cooperates with the bending hole, and the blanking punch cooperates with the first blanking hole; the upper end of the upper pad is connected to a punching machine, and the lower end of the lower template is fixed on a punching table.

[0007] An upper die seat is arranged at the upper end of the upper pad, and the upper end of the upper die seat is fixed to the die handle by a die handle screw, and the upper die seat is connected to the punching machine through the die handle; an outer guide sleeve is arranged on the upper die seat; the lower end of the lower template fixes the lower pad to the lower die seat by the lower die screw, and a guide column is arranged on the lower die seat, and the guide column and the lower die seat have an interference fit, a wire spring is installed on the upper part of the guide column, and the steel ball guide sleeve and the guide column have a clearance sliding fit, and the outer guide sleeve is pre-positioned by guiding with the steel ball guide sleeve to ensure the centering accuracy of the upper die seat and the lower die seat.

[0008] The upper pad is also provided with a positioning punch, a punching punch, a trimming punch, a positioning pin, a bending punch and a blanking punch. The positioning punch, the punching punch, the trimming punch, the positioning pin, the bending punch and the blanking punch constitute a functionally integrated stamping module with the upper pad; the upper die base is equipped with an upper die clamping pin and a unloading bolt, the upper die base and the upper pad are interference fit through the upper die clamping pin, and the upper end of the unloading bolt is installed on the upper die base, and the lower end of the unloading bolt is connected to the stripping plate. The first spring is placed between the upper pad and the stripping plate through the unloading bolt. A limiting hole is arranged on the stripping plate, and the stripping plate positioning sleeve is fixed on the stripping plate.

[0009] The lower die seat is provided with a third positioning punch clearance hole, a third punching discharge hole, a third trimming discharge hole and a third blanking hole. The lower die seat is fixed with a lower template by a lower die screw. The lower template is provided with a floating guide pin, a first positioning punch clearance hole, a first punching discharge hole, a first trimming discharge hole, a positioning needle clearance hole, a bending hole, a first blanking hole, a clearance hole, a lower die clamping pin and a lower die screw to form a functionally integrated lower die assembly. The lower pad is provided with a second positioning punch clearance hole, a second punching discharge hole, a second trimming discharge hole and a second blanking hole. The lower pad is installed between the lower die seat and the lower template by the lower die screw. The floating guide pin is installed in the corresponding mounting hole of the lower template. The bottom of the floating guide pin is connected to the second spring. A stop screw is provided at the lower end of the second spring. The stop screw is installed on the lower pad. A limiting groove is provided on the top of the floating guide pin.

[0010] A composite stamping forming method for an electrical connection bracket is specifically as follows: a material strip is placed between an upper die set and a lower die set, the material strip passes through a first punching discharge hole, a first trimming discharge hole, a bending hole and a first blanking hole on the lower die set in sequence, the upper die set moves up and down, so that a punching punch, a trimming punch, a bending punch and a blanking punch act on the material strip in sequence, and the material strip is punched, trimmed, bent and blanked to form an electrical connection bracket.

[0011] Punching holes in the material strip is performed as follows: the upper die set descends, the outer guide sleeve and the steel ball guide sleeve are first pre-aligned and positioned, the upper die set continues to descend, the positioning pin and the lower die positioning sleeve are aligned and positioned again, the upper die set continues to descend, the limiting hole on the stripping plate contacts the floating guide pin, and drives the material strip to move downward together until the stripping plate, the material strip and the lower template are tightly pressed together, the upper die set continues to move downward, the positioning punch punches the material strip, and then the punching punch enters the first punching discharge hole to complete the punching of the material strip.

[0012] The material strip after punching is trimmed, specifically: the positioning pin and the positioning pin clearance hole are aligned, the upper die set continues to descend, the limit hole on the stripper plate contacts the floating guide pin again, and drives the material strip to move downward together until the stripper plate, the material strip and the lower template are pressed tightly, the upper die set continues to move downward, the trimming punch enters the bottom of the first trimming discharge hole, and the trimming punch trims the material strip.

[0013] The trimmed material strip is bent as follows: the positioning pin is aligned with the positioning pin clearance hole, the upper die set continues to descend, the limit hole on the stripper plate contacts the floating guide pin, and the material strip is driven to move downward until the stripper plate, the material strip and the lower template are pressed tightly, the upper die set continues to move downward, the bending punch enters the bending hole, and the trimmed material strip is bent.

[0014] The bent material strip is blanked as follows: the positioning pin is aligned with the positioning pin clearance hole, the upper die set continues to descend, the limit hole on the stripping plate contacts the floating guide pin, and the material strip moves downward until the stripping plate, the material strip and the lower template are pressed tightly, the upper die set continues to move downward, the blanking punch enters the bottom of the first blanking hole, and the bent material strip is sheared.

[0015] An electrical connection bracket comprises a bracket shape and a mounting hole. The bracket shape has a bending structure, and the mounting hole is located on the short side bending structure of the bracket shape. The electrical connection bracket can be formed by using a composite stamping forming method of the electrical connection bracket.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a composite stamping forming device for an electrical connection bracket, which is formed by continuous stamping processing and adopts continuous and precise processing of punching-bending-blank and other processes to ensure the dimensional accuracy and consistency of the bracket shape and hole features. The guide pillar mechanism (external guide sleeve, steel ball guide sleeve, guide pillar and wire spring) in the stamping process is pre-positioned to ensure the accurate centering of the upper die set and the lower die set, effectively avoiding the hole position offset and dimensional inconsistency caused by the separation of processes in traditional wire cutting processing. The multi-row concave and convex die design is adopted, and multiple workpieces can be produced in one stamping, which greatly shortens the product processing cycle. Compared with traditional wire cutting processing, the stamping processing speed is fast, and the processes of punching, bending, blanking, etc. are completed continuously on one stamping equipment, without the need for multiple clamping and adjustment, reducing the equipment adjustment time and auxiliary time, thereby significantly improving production efficiency.

[0017] The present invention proposes a composite stamping forming method for an electrical connection bracket, which adopts a continuous stamping forming method, and ensures the dimensional accuracy and consistency of the bracket shape and hole features through continuous and precise processing of punching-bending-blank and other processes. During the stamping process, the guide post mechanism (external guide sleeve, steel ball guide sleeve, guide post and wire spring) is used to perform pre-positioning and guide to ensure the accurate centering of the upper die set and the lower die set, thereby effectively avoiding the problems of hole position offset and inconsistent dimensional features caused by the separation of shape processing and punching process in traditional wire cutting processing. Among them, the stamping process belongs to cold processing and will not produce a large thermal impact, thereby avoiding the problems of oxidation and corrosion of the surface of the parts, ensuring the excellent surface quality of the bracket, and will not have defects such as surface corrosion and poor wettability caused by arc discharge in traditional wire cutting processing, thereby improving the subsequent tinning performance of the bracket. Furthermore, by improving processing efficiency and material utilization, the waste generation and equipment energy consumption in the production process are reduced, and the production cost is reduced. At the same time, the continuous stamping processing method reduces multiple processes in traditional processing, reduces labor costs and equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : Schematic diagram of the structure of the composite stamping forming device for the electrical connection bracket; Figure 2 :Top view of the upper module; Figure 3 : Bottom view of the upper module; Figure 4 :Top view of the lower module; Figure 5 : Bottom view of the lower module; Figure 6 : Schematic diagram of the floating guide pin structure; Figure 7 : Schematic diagram of electrical connection bracket; Figure 8 : Schematic diagram of the processing flow of the electrical connection bracket; Fig. 9 : Schematic diagram of material strip cutting.

[0019] 1. Upper die seat; 2. Upper pad; 3. Positioning punch; 3-1. First positioning punch clearance hole; 3-2. Second positioning punch clearance hole; 3-3. Third positioning punch clearance hole; 4. Upper die screw; 5. Punching punch; 5-1. First punch discharge hole; 5-2. Second punch discharge hole; 5-3. Third punch discharge hole; 6. Positioning pin; 7. Stripper plate positioning sleeve; 8. Trimming punch; 8-1. First trimming discharge hole; 8-2. Second trimming discharge hole; 8-3. Third trimming discharge hole; 9. Die handle screw; 10. Die handle; 11. Positioning pin; 11-1. Positioning pin clearance hole; 12. Bending punch; 12-1. Bending hole; 13. Upper die clamping pin; 14. Blanking punch; 14 -1, first blanking hole; 14-2, second blanking hole; 14-3, third blanking hole; 15, unloading bolt; 16, first spring; 17, stripping plate; 18, outer guide sleeve; 19, steel ball guide sleeve; 20, guide column; 21, wire spring; 22, lower die screw; 23, lower template; 24, lower pad; 25, lower die seat; 26, lower die clamping pin; 27, lower die positioning sleeve; 28, floating guide pin; 28-1, limiting hole; 28-2, limiting groove; 29, stop screw; 30, second spring; 31, clearance hole; 100, electrical connection bracket shape; 100-1, mounting hole; 200, material strip; 200-1, positioning hole; 200-2, trimming hole; 200-3, pre-finished product. DETAILED DESCRIPTION

[0020] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0021] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] Example 1 This embodiment proposes a composite stamping and forming device for an electrical connection bracket, and its specific implementation method is as follows: like Figures 1 to 6As shown, the composite stamping forming device of the electrical connection bracket includes an upper die set and a lower die set, and the upper die set includes an upper die seat 1, and the upper die seat 1 is fixed on the punching machine through a die handle 10. The die handle 10 is threadedly connected to the upper die seat 1 through a die handle screw 9 to realize the power transmission and precise motion control between the upper die set and the punching machine. The upper die seat 1 is interference fit with the outer guide sleeve 18, and the outer guide sleeve 18 is used to perform pre-positioning with the steel ball guide sleeve 19 of the lower die set to ensure the centering accuracy of the upper die set and the lower die set. The upper die seat 1 is fixedly connected to the upper pad 2 through the upper die screw 4, and the upper pad 2 is integrated with a positioning punch 3, a punching punch 5, a positioning pin 6, a trimming punch 8, a positioning pin 11, a bending punch 12, an upper die clamping pin 13, a blanking punch 14 and a discharge bolt 15. These components are fixed to the upper pad 2 through threaded connection or interference fit to form a functionally integrated stamping module. The positioning punch 3 and the positioning pin 6 are respectively installed on the upper pad 2, and are used to perform preliminary positioning and guiding of the material strip during the stamping process to ensure that the position of the material strip is accurate during stamping. The positioning pin 11 is installed on the upper pad 2, and cooperates with the positioning pin clearance hole 11-1 of the lower die group during the stepping process of the material strip to achieve accurate positioning of the material strip and ensure stamping accuracy. The upper die clamping pin 13 is installed on the upper die base 1, and is used to perform interference fit between the upper die base 1 and the upper pad 2, limit its lateral rotation, and ensure the overall structural stability of the upper die group. The unloading bolt 15 is installed on the upper die base 1, and its lower end is connected to the stripper plate 17. The stripper plate positioning sleeve 7 is installed at the lower end of the upper pad 2 and is fixed by interference fit to provide accurate positioning and support for the stripper plate 17. The stripper plate 17 is tightly fitted with the stripper plate positioning sleeve 7. During the stamping process, the stripper bolt 15 and the first spring 16 work together to provide downward pressure for the stripper plate 17. At the same time, when the upper mold assembly rises, the elastic force of the first spring 16 helps the stripper plate 17 to quickly reset, ensuring smooth transmission of the material belt 200.

[0023] The lower die set is fixed on the punching machine platform, and the lower die base 25 is fixed on the punching machine platform by the lower die screw 22 to ensure the stability and accurate position of the lower die set. The lower mold plate 23 is fixedly connected with the lower die base 25 by the lower die screw 22 to form the main structure of the lower die set. The lower die plate 23 is fixed on the lower die positioning sleeve 27, and the lower die seat is provided with a third positioning punch clearance hole 3-3, a third punching discharge hole 5-3, a third trimming discharge hole 8-3 and a third blanking hole 14-3. The lower die seat 25 is fixed with the lower die plate 23 by the lower die screw 22. The lower die plate 23 is provided with a floating guide pin 28, a first positioning punch clearance hole 3-1, a first punching discharge hole 5-1, a first trimming discharge hole 8-1, a positioning pin clearance hole 11-1, a bending hole 12-1, a first blanking hole 14-1, a clearance hole 31, a lower die clamping pin 26 and a lower die screw 22, forming a functionally integrated lower die assembly. The lower pad 24 is installed between the lower die seat 25 and the lower die plate 23 by the lower die screw 22, which is used to support and position the lower die plate 23, and at the same time provides a channel for the discharge of waste during the stamping process. The lower pad 24 is provided with a second positioning punch clearance hole 3-2, a second punch discharge hole 5-2, a second trimming discharge hole 8-2 and a second blanking hole 14-2. The floating guide pin 28 is installed in the corresponding installation hole of the lower template 23. The bottom of the floating guide pin 28 is connected to the second spring 30. The lower end of the second spring 30 is provided with a stop screw 29, which is installed on the lower pad 24. The stop screw 29 is used to compress the second spring 30. The second spring 30 provides an upward elastic force, thereby pushing the floating guide pin 28 to rise, lifting the material belt 200, and realizing the precise positioning and transmission of the material belt. A limiting groove 28-2 is provided on the top of the floating guide pin 28 to ensure that the material belt 200 does not extend excessively when rising or falling, thereby realizing accurate positioning and transmission of the material belt 200. At the same time, a limiting hole 28-1 corresponding to the floating guide pin 28 is provided on the stripping plate 17 to ensure that the upper die set first contacts the floating guide pin 28 during the descent process to avoid deformation caused by pressing down on the material belt 200. The guide post 20 and the lower die seat 25 have an interference fit, and a wire spring 21 is installed on the upper part of the guide post 20. The steel ball guide sleeve 19 and the guide post 20 have a clearance sliding fit to realize the pre-positioning of the upper and lower die sets and ensure the stamping accuracy. During the stamping process, when the upper die set descends, the outer guide sleeve 18 first contacts the steel ball guide sleeve 19 and performs centering pre-positioning to ensure the centering accuracy of the upper and lower die sets. As the upper die set continues to descend, the guide pin 20 enters the outer guide sleeve 18, further guiding the precise movement of the upper die set, thereby ensuring the precise fit between the upper die set and the lower die set during the stamping process.The upper die set and the lower die set are guided and pre-positioned by the outer guide sleeve 18, the steel ball guide sleeve 19, the guide column 20 and the wire spring 21. At the same time, during the stamping process, the punching punch 5, the trimming punch 8, the bending punch 12 and the blanking punch 14 of the upper die set cooperate with the corresponding first punching discharge hole 5-1, the first trimming discharge hole 8-1, the bending hole 12-1 and the first blanking hole 14-1 of the lower die set to complete the punching, trimming, bending and blanking stamping processes.

[0024] Example 2 This embodiment proposes an electrical connection bracket, which is stamped and formed by using the electrical connection bracket composite stamping and forming device described in Embodiment 1. The stamping and forming method is as follows: After cutting the raw material, a material strip 200 with a certain width and length is formed, such as Fig. 9 As shown in the schematic diagram of strip cutting, it is prepared for stamping. Figure 8 The material strip 200 is placed horizontally on the floating guide pin 28, and the limiting groove 28-2 is used to limit the material strip 200, so that the material strip 200 can only move along the set direction, so that the material strip 200 is suspended parallel to the middle of the stripping plate 17 and the lower template 23. Figure 1 The left side of the diagram gradually moves to the right in steps, and the stamping process is implemented step by step: G1: punching, G2: trimming, G3: empty step, G4: bending, G5: empty step, G6: blanking.

[0025] In the G1 punching stage, the upper die set begins to descend, and the outer guide sleeve 18 and the steel ball guide sleeve 19 are first pre-positioned and aligned. Then, the upper die set continues to descend, and the positioning pin 6 and the lower die positioning sleeve 27 are aligned and positioned again to ensure that the centering accuracy of the upper die set and the lower die set meets the requirements. Subsequently, the upper die set continues to descend, and the limiting hole 28-1 on the stripping plate 17 contacts the floating guide pin 28, and drives the material belt 200 to move downward together until the stripping plate 17, the material belt 200 and the lower template 23 are tightly pressed together. After that, the upper die set continues to move downward, and the positioning punch 3 first punches the positioning hole 200-1, and then the punching punch 5 enters the first punching discharge hole 5-1 to punch out the mounting hole 100-1 of the electrical connection bracket shape 100. The waste generated during the punching process is discharged in sequence through the first positioning punch clearance hole 3-1, the second positioning punch clearance hole 3-2, the third positioning punch clearance hole 3-3, and the first punching discharge hole 5-1, the second punching discharge hole 5-2, and the third punching discharge hole 5-3. After the punching is completed, the upper die set rises, the stripping plate 17 separates from the floating guide pin 28, and the floating guide pin 28 rises under the elastic force of the second spring 30, lifting the material strip 200 back to the initial height to prepare for the next process.

[0026] Entering the G2 trimming stage, the material strip 200 steps forward one position, and the upper mold assembly descends again. At this time, the positioning pin 11 is aligned with the positioning pin clearance hole 11-1 to achieve precise positioning of the material strip. The upper mold assembly continues to descend, and the limit hole 28-1 on the stripper plate 17 contacts the floating guide pin 28 again, and drives the material strip 200 to move downward together until the stripper plate 17, the material strip 200 and the lower mold plate 23 are pressed tightly. Subsequently, the upper mold assembly continues to move downward, and the trimming punch 8 enters the bottom of the first trimming discharge hole 8-1 to punch the trimming hole 200-2. The waste generated during the trimming process is discharged through the first trimming discharge hole 8-1, the second trimming discharge hole 8-2 and the third trimming discharge hole 8-3. After the trimming is completed, the upper mold assembly rises, the stripper plate 17 is disengaged from the floating guide pin 28, and the floating guide pin 28 rises under the action of the second spring 30 to restore the material strip 200 to its initial height.

[0027] In the G3 empty step stage, the material strip 200 steps forward again, the upper mold assembly descends, and the positioning pin 11 is aligned with the positioning pin clearance hole 11-1 to ensure that the material strip is accurately positioned. The upper mold assembly continues to descend, and the limit hole 28-1 on the stripper plate 17 contacts the floating guide pin 28, driving the material strip 200 to move downward until the stripper plate 17, the material strip 200 and the lower mold plate 23 are pressed tightly. This step does not set a punch and a die. After the upper mold assembly reaches the descending position, it starts to rise, and the stripper plate 17 separates from the floating guide pin 28. The floating guide pin 28 rises under the elastic force of the second spring 30, and the material strip 200 is lifted back to the initial height, ready to enter the next process.

[0028] At the G4 bending stage, the material strip 200 steps forward one position, the upper mold assembly descends, and the positioning pin 11 is aligned with the positioning pin clearance hole 11-1 to achieve precise positioning of the material strip. The upper mold assembly continues to descend, and the limit hole 28-1 on the stripper plate 17 contacts the floating guide pin 28, driving the material strip 200 to move downward until the stripper plate 17, the material strip 200 and the lower template 23 are pressed tightly. Subsequently, the upper mold assembly continues to move downward, and the bending punch 12 enters the bending hole 12-1 to bend the electrical connection bracket shape 100 to form a pre-finished product 200-3 with a bent shape. After the bending is completed, the upper mold assembly rises, the stripper plate 17 is disengaged from the floating guide pin 28, and the floating guide pin 28 rises under the action of the second spring 30, restoring the material strip 200 to its initial height.

[0029] In the G5 empty step stage, the material strip 200 steps forward again, the upper mold assembly descends, and the positioning pin 11 is aligned with the positioning pin clearance hole 11a to ensure that the material strip is accurately positioned. The upper mold assembly continues to descend, and the limit hole 28-1 on the stripper plate 17 contacts the floating guide pin 28, driving the material strip 200 to move downward until the stripper plate 17, the material strip 200 and the lower mold plate 23 are pressed together. No punch and die are set in this process step, and the pre-finished product 200-3 enters the clearance hole 31. After the upper mold assembly reaches the descending position, it begins to rise, and the stripper plate 17 separates from the floating guide pin 28. The floating guide pin 28 rises under the elastic force of the second spring 30, and the material strip 200 is lifted back to the initial height to prepare for the next process.

[0030] Finally, in the G6 blanking stage, the material strip 200 steps forward one position, the upper mold assembly descends, and the positioning pin 11 is aligned with the positioning pin clearance hole 11a to ensure that the material strip 200 is accurately positioned. The upper mold assembly continues to descend, and the limit hole 28-1 on the stripper plate 17 contacts the floating guide pin 28, driving the material strip 200 to move downward until the stripper plate 17, the material strip 200 and the lower template 23 are pressed tightly. Subsequently, the upper mold assembly continues to move downward, and the blanking punch 14 enters the bottom of the first blanking hole 14-1 to perform a shearing operation, and finally forms the electrical connection bracket shape 100. The electrical connection bracket shape 100 is discharged through the first blanking hole 14-1, the second blanking hole 14-2 and the third blanking hole 14-3. After the blanking is completed, the upper mold assembly rises, the stripper plate 17 is disengaged from the floating guide pin 28, and the floating guide pin 28 rises under the action of the second spring 30, restoring the material strip 200 to its initial height.

[0031] By repeating the above steps G1 to G6, continuous composite stamping processing of the electrical connection bracket 100 is achieved to form Figure 7 The electrical connection bracket structure shown in the figure is used to efficiently and accurately complete the manufacture of the electrical connection bracket.

[0032] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A composite stamping and forming device for an electrical connection bracket, characterized in that: The invention comprises an upper die set and a lower die set, wherein a material strip (200) is placed between the upper die set and the lower die set, the upper die set comprises an upper pad (2), on which a positioning punch (3), a punching punch (5), a trimming punch (8), a positioning needle (11), a bending punch (12) and a blanking punch (14) are sequentially mounted, and the lower die set comprises a lower template (23), on which a first positioning punch clearance hole (3-1), a first punching discharge hole (5-1), a first trimming discharge hole (8-1), a positioning needle clearance hole (11-1), a bending hole (12-1) and a first a blanking hole (14-1); the positioning punch (3) cooperates with the first positioning punch clearance hole (3-1), the punching punch (5) cooperates with the first punching discharge hole (5-1), the trimming punch (8) cooperates with the first trimming discharge hole (8-1), the positioning needle (11) cooperates with the positioning needle clearance hole (11-1), the bending punch (12) cooperates with the bending hole (12-1), and the blanking punch (14) cooperates with the first blanking hole (14-1); the upper end of the upper pad (2) is connected to the punching machine, and the lower end of the lower template (23) is fixed to the punching table.

2. The composite stamping forming device for an electrical connection bracket according to claim 1, characterized in that: An upper die seat (1) is arranged at the upper end of the upper pad (2), the upper end of the upper die seat (1) is fixed to the die handle (10) by a die handle screw (9), and the upper die seat (1) is connected to the punching machine by the die handle (10); an outer guide sleeve (18) is arranged on the upper die seat (1); the lower end of the lower die plate (23) fixes the lower pad (24) to the lower die seat (25) by the lower die screw (22), and a guide column (20) is arranged on the lower die seat (25), the guide column (20) and the lower die seat (25) are interference fit, a wire spring (21) is installed on the upper part of the guide column (20), the steel ball guide sleeve (19) and the guide column (20) are clearance sliding fit, and the outer guide sleeve (18) is pre-positioned by being guided with the steel ball guide sleeve (19) to ensure the centering accuracy of the upper die seat (1) and the lower die seat (25).

3. The composite stamping forming device for an electrical connection bracket according to claim 2, characterized in that: The upper backing plate (2) is also provided with a positioning punch (3), a punching punch (5), a trimming punch (8), a positioning pin (11), a bending punch (12) and a blanking punch (14); the positioning punch (3), the punching punch (5), the trimming punch (8), the positioning pin (11), the bending punch (12) and the blanking punch (14) together with the upper backing plate (2) form a functionally integrated stamping module; an upper die clamping pin (13) and a discharge bolt (14) are installed on the upper die seat (1). 5), the upper die base (1) and the upper pad (2) are interference fit through the upper die clamping pin (13), and the upper end of the unloading bolt (15) is installed on the upper die base (1), the lower end of the unloading bolt (15) is connected to the stripping plate (17), the first spring (16) is placed between the upper pad (2) and the stripping plate (17) through the unloading bolt (15), a limiting hole (28-1) is provided on the stripping plate (17), and the stripping plate positioning sleeve (7) is fixed on the stripping plate (17).

4. The composite stamping and forming device for an electrical connection bracket according to claim 2, characterized in that: The lower die base (25) is provided with a third positioning punch clearance hole (3-3), a third punching discharge hole (5-3), a third trimming discharge hole (8-3) and a third blanking hole (14-3); the lower die base (25) is fixed with a lower die plate (23) by a lower die screw (22); the lower die plate (23) is provided with a floating guide pin (28), a first positioning punch clearance hole (3-1), a first punching discharge hole (5-1), a first trimming discharge hole (8-1), a positioning pin clearance hole (11-1), a bending hole (12-1), a first blanking hole (14-1), a clearance hole (31), a lower die clamping pin (26) and a lower die screw (22), forming a functional set The lower die assembly is formed, and a second positioning punch clearance hole (3-2), a second punching discharge hole (5-2), a second trimming discharge hole (8-2) and a second blanking hole (14-2) are provided on the lower pad (24). The lower pad (24) is installed between the lower die base (25) and the lower die plate (23) through the lower die screw (22). The floating guide pin (28) is installed in the corresponding installation hole of the lower die plate (23). The bottom of the floating guide pin (28) is connected to the second spring (30). The lower end of the second spring (30) is provided with a stop screw (29), and the stop screw (29) is installed on the lower pad (24). The top of the floating guide pin (28) is provided with a limit groove (28-2).

5. A composite stamping method for an electrical connection bracket, based on a composite stamping device for an electrical connection bracket according to any one of claims 1 to 4, characterized in that: Specifically, the material strip (200) is placed between the upper die set and the lower die set, and the material strip (200) passes through the first punching discharge hole (5-1), the first trimming discharge hole (8-1), the bending hole (12-1) and the first blanking hole (14-1) on the lower die set in sequence, and the upper die set moves up and down, so that the punching punch (5), the trimming punch (8), the bending punch (12) and the blanking punch 14 act on the material strip (200) in sequence, and the material strip (200) is punched, trimmed, bent and blanked to form an electrical connection bracket.

6. A composite stamping method for an electrical connection bracket according to claim 5, characterized in that: The material strip (200) is punched, specifically: the upper die set descends, the outer guide sleeve (18) and the steel ball guide sleeve (19) are first pre-positioned and aligned, the upper die set continues to descend, the positioning pin (6) and the lower die positioning sleeve (27) are again aligned and positioned, the upper die set continues to descend, the limiting hole (28-1) on the stripping plate (17) contacts the floating guide pin (28), and drives the material strip (200) to move downward together, until the stripping plate (17), the material strip (200) and the lower template (23) are tightly pressed together, the upper die set continues to move downward, the positioning punch (3) punches the material strip (200), and then the punching punch (5) enters the first punching discharge hole (5-1), completing the punching of the material strip (200).

7. The composite stamping method for an electrical connection bracket according to claim 6, characterized in that: The material strip (200) after punching is trimmed, specifically: the positioning pin (11) is aligned with the positioning pin clearance hole (11-1), the upper mold assembly continues to descend, the limit hole (28-1) on the stripping plate (17) contacts the floating guide pin (28) again, and drives the material strip (200) to move downward together until the stripping plate (17), the material strip (200) and the lower mold plate (23) are pressed tightly, the upper mold assembly continues to move downward, the trimming punch (8) enters the bottom of the first trimming discharge hole (8-1), and the trimming punch (8) trims the material strip (200).

8. A composite stamping method for an electrical connection bracket according to claim 7, characterized in that: The trimmed material strip (200) is bent by aligning the positioning pin (11) with the positioning pin clearance hole (11-1), the upper mold assembly continues to descend, the limiting hole (28-1) on the stripping plate (17) contacts the floating guide pin (28), and the material strip (200) is driven to move downward until the stripping plate (17), the material strip (200) and the lower mold plate (23) are pressed together, the upper mold assembly continues to move downward, the bending punch (12) enters the bending hole (12-1), and the trimmed material strip (200) is bent.

9. A composite stamping method for an electrical connection bracket according to claim 8, characterized in that: The bent material strip (200) is blanked, specifically: the positioning pin (11) is aligned with the positioning pin clearance hole (11-1), the upper die set continues to descend, the limiting hole (28-1) on the stripping plate (17) contacts the floating guide pin (28), and the material strip (200) is driven to move downward until the stripping plate (17), the material strip (200) and the lower template (23) are pressed together, the upper die set continues to move downward, the blanking punch (14) enters the bottom of the first blanking hole (14-1), and the bent material strip (200) is sheared.

10. An electrical connection bracket, based on the composite stamping forming method of an electrical connection bracket according to any one of claims 5 to 9, characterized in that: The electrical connection bracket comprises an electrical connection bracket shape (100) and a mounting hole (100-1); a bending structure is present on the electrical connection bracket shape (100); the mounting hole (100-1) is located on the short side bending structure of the electrical connection bracket shape (100); and the electrical connection bracket can be formed by using an electrical connection bracket composite stamping forming method.

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