A near-net-shape forming mold for complex-shaped power fittings

Abstract

This invention relates to the field of stamping forming technology, and in particular to a near-net-shape forming die for complex-shaped power fittings, comprising a stamping table, an upper mounting base, and a lower mounting base. The lower mounting base is bolted to the stamping table. Through the arrangement of a first stamping die, a second stamping die, and a pushing mechanism, this invention can achieve a near-net-shape forming solution for two parts in one stamping. By simply doubling the width of the feed copper sheet, the first station simultaneously completes the cutting and center seam trimming, dividing the copper sheet in two. Subsequently, under the operation of the pushing mechanism, the second stamping die is driven to descend first, and then the semi-finished clamp on the first stamping die is pushed out. The clamp is then pushed onto the secondary stamping die in front by the second stamping die. During the reset process of the pushing mechanism, the second stamping die is driven to reset, thereby pushing the semi-finished clamp on the second stamping die through the first stamping die and onto the secondary stamping die behind, thus achieving single-machine double output.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and in particular to a near-net-shape forming mold for complex-shaped power fittings. Background Technology

[0002] Power clamps are the fasteners between towers, crossarms, and insulators. They are formed from copper sheets in a single, near-net-shape process, combining conductivity, vibration resistance, and corrosion resistance to ensure a stable current flow through the tower without loosening. During the production of power clamps, the copper sheets are transported to the first station for precise cutting and pre-pressing of a double arc. Then, they are moved to the second station and rolled into a clamp in one go. The two stations share a set of progressive feeding and pneumatic unloading. The entire process is free of milling and waste. The shape is only slightly different from the finished product by a chamfer, achieving near-net-shape forming. The mold adopts a split insert structure, and the cutting edge and forming surface can be quickly changed separately. Positioning is ensured by spring side push and guide pillars, ensuring that the arc surface of each clamp has consistent springback and the hole is aligned.

[0003] The existing copper clamp stamping line uses a single-in-single-out layout, with only one strip channel inside the mold, producing one piece per stroke. To expand production, multiple sets of molds or complete machines must be added side by side, resulting in a simultaneous increase in the number of stamping machines, floor space, energy consumption, and mold replacement and maintenance. When multiple machines run in parallel, the strip alignment references are different, and the springback of the curved surface varies greatly. The subsequent rolling station requires repeated machine adjustments, making it difficult to guarantee batch consistency. At the same time, single-piece flow leads to high waste at the beginning and end of the material, and the area of ​​the buffer area and logistics channel next to the machine is expanded, limiting the increase in workshop capacity density.

[0004] Therefore, a near-net-shape forming mold for complex-shaped power fittings is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a near-net-shape forming mold for complex-shaped power fittings.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a near-net-shape forming mold for complex-shaped power fittings, comprising a stamping table (1), an upper mounting base (2), and a lower mounting base (3), characterized in that: the lower mounting base (3) is mounted on the stamping table (1) by bolts, and telescopic guide columns (4) are fixedly connected to the four corners of the top of the lower mounting base (3), the telescopic ends of the telescopic guide columns (4) are fixedly connected to the bottom of the upper mounting base (2), the upper mounting base (2) is fixedly connected to the stamping end of the stamping forming machine, a lower punching die (5) is mounted on the top of the lower mounting base (3) by bolts, and an upper punching die (6) is mounted on the bottom of the upper mounting base (2) above the lower punching die (5) by bolts, and a first stamping die (7) and a second stamping die (8) are provided next to the lower punching die (5), the first stamping die (7) and the second stamping die (8) (8) For pressing the copper sheet, the first stamping die (7) is installed on the lower mounting base (3) by bolts. The top of the lower mounting base (3) is fixedly connected to a pair of secondary stamping dies (9), and the secondary stamping dies (9) are respectively located behind the first stamping die (7) and in front of the second stamping die (8). The secondary stamping dies (9) are used to stamp and form the semi-finished clamp. They are also provided with a pushing mechanism for first lowering the second stamping die (8) and then pushing the material. The bottom of the upper mounting base (2) is fixedly connected to an upper stamping die (10) above the first stamping die (7) and the second stamping die (8). The upper stamping die (10) is fixedly connected to both the front and rear sides of the upper stamping die (10). The upper punch cutter (12) is fixedly connected to the middle of the upper stamping die (10). The upper punch cutter (12) is used to split the copper sheet in two.

[0007] In the above technical solution, a lower punch cutter is further fixedly connected to the side wall of the upper punching die, and the lower punch cutter is positioned between the upper punching die and the upper stamping die.

[0008] In the above technical solution, the pushing mechanism further includes an electric telescopic cylinder, which is fixedly connected to the top of the stamping table. A driving block is fixedly connected to the output end of the electric telescopic cylinder. An L-shaped plate is fixedly connected to the top of the side wall of the driving block. An extrusion plate is provided below the L-shaped plate, and a connecting block is fixedly connected between the extrusion plate and the driving block. A straight groove is provided on the side of the extrusion plate near the first stamping die, and an inclined groove is provided on the side of the extrusion plate away from the L-shaped plate. A round rod is fixedly connected to the side wall of the second stamping die. A flipping groove is provided at the top of the straight groove. A flipping cylinder is rotatably connected to the inside of the flipping groove, and a right-angled block with an inclined surface is fixedly connected to the bottom end of the flipping cylinder.

[0009] In the above technical solution, the inclined surface of the right-angle block is flush with the inclined surface of the inclined groove, the round rod is inserted into the inner side of the straight groove, and the side wall of the flipping cylinder abuts against the side wall of the flipping groove.

[0010] In the above technical solution, a spiral spring is further provided inside the tilting cylinder, one end of the spiral spring is fixedly connected to the inner wall of the tilting cylinder, and the other end of the spiral spring is fixedly connected to the side wall of the tilting groove.

[0011] In the above technical solution, a telescopic cylinder is fixedly connected to the top of the lower mounting base relative to the position below the second stamping die, and a telescopic block is fixedly connected to the bottom of the second stamping die. The telescopic block is longitudinally slidably connected to the inside of the telescopic cylinder, and four return springs are fixedly connected at equal intervals between the bottom end of the telescopic block and the bottom end of the telescopic cylinder.

[0012] In the above technical solution, further, a pair of positioning blocks are fixedly connected to the two secondary stamping dies on the opposite side, a rectangular groove is opened at the top of the lower punching die, a lower punching plate is slidably connected to the inner side of the rectangular groove, and several positioning rods are fixedly connected at equal intervals on both sides of the top of the lower punching plate.

[0013] In the above technical solution, the front side of the lower punching die is threadedly connected to a stud, the rear side of the stud is rotatably connected to the front side of the lower punching plate, and the front side of the stud is fixedly connected to a rotating head.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This invention, through the arrangement of a first stamping die, a second stamping die, and a pushing mechanism, enables a near-net-shape solution for producing two parts in one stamping. Simply by doubling the width of the copper sheet being fed in, the first station simultaneously performs cutting and center seam trimming, dividing the copper sheet in two. Then, under the operation of the pushing mechanism, the second stamping die is driven to descend, pushing out the semi-finished clamp from the first stamping die. This clamp is then pushed through the second stamping die to the secondary stamping die in front. During the resetting process of the pushing mechanism, the second stamping die is driven to reset, thereby pushing the semi-finished clamp from the second stamping die through the first stamping die to the secondary stamping die behind. This achieves double output from a single machine, doubling production capacity without the need for additional machines. Furthermore, the shared feeding and guiding system ensures consistent springback of the two curved surfaces, significantly optimizing material utilization and space utilization.

[0016] 2. The present invention, through the setting of structures such as studs, lower cutting plates and positioning rods, can not only ensure the accuracy of the position of copper sheet during the conveying process, but also adjust the position of the lower cutting plate by rotating the stud, and then adjust the position of the upper cutting die, so as to change the position of the copper sheet between the first stamping die and the second stamping die, and can stamp out two power clamps of different widths at one time, improving the flexibility of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the front of the stamping table of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall appearance structure of the upper and lower mounting bases of the present invention;

[0019] Figure 3 This is a bottom-view perspective view of the upper mounting base of the present invention.

[0020] Figure 4 This is a schematic diagram of the overall appearance structure of the lower punch plate and stud of the present invention;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the first stamping die, the second stamping die, and the telescopic cylinder of the present invention.

[0022] Figure 6 This is a top-view perspective view of the lower mounting base of the present invention.

[0023] Figure 7 This is a schematic diagram of the partially separated three-dimensional structure of the extrusion plate and the right-angled block of the present invention;

[0024] Figure 8 This is a schematic diagram of the overall appearance structure of the drive block, L-shaped plate and extrusion plate of the present invention;

[0025] Figure 9 This is a side perspective view of the first stamping die, the second stamping die, and the pusher mechanism of the present invention during operation.

[0026] In the diagram: 1. Stamping table; 2. Upper mounting base; 3. Lower mounting base; 4. Telescopic guide column; 5. Lower punching die; 6. Upper punching die; 7. First stamping die; 8. Second stamping die; 9. Secondary stamping die; 10. Upper stamping die; 11. Stamping head; 12. Upper punching cutter; 13. Lower punching cutter; 14. Electric telescopic cylinder; 15. Drive block; 16. L-shaped plate; 17. Extrusion plate; 18. Connecting block; 19. Straight groove; 20. Inclined groove; 21. Round rod; 22. Tilting groove; 23. Tilting cylinder; 24. Right-angle block; 25. Spiral spring; 26. Telescopic cylinder; 27. Telescopic block; 28. Return spring; 29. ​​Positioning block; 30. Rectangular groove; 31. Lower punching plate; 32. Positioning rod; 33. Stud; 34. Rotating head. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0029] In practical use, it was found that the existing copper clamp stamping line uses a single-in-single-out layout, with only one material strip channel in the mold, producing one piece per stroke. If production needs to be expanded, multiple sets of molds or complete machines can only be added side by side, which leads to a simultaneous increase in the number of stamping machines, floor space, energy consumption, and mold replacement and maintenance. When multiple machines run in parallel, the material strip centering reference is different, and the springback of the arc surface varies greatly. The subsequent rolling station needs to be repeatedly adjusted, and batch consistency is difficult to guarantee. At the same time, the single-piece flow results in high material waste at the beginning and end of the process, and the area of ​​the machine buffer area and logistics channel is expanded accordingly, which limits the increase of workshop capacity density. To solve the above problems, the following structure was invented.

[0030] like Figures 1-9 The diagram shows a near-net-shape forming mold for complex-shaped power fittings, comprising a stamping table 1, an upper mounting base 2, and a lower mounting base 3. The lower mounting base 3 is bolted to the stamping table 1. Telescopic guide columns 4 are fixedly connected to the four corners of the top of the lower mounting base 3. The telescopic ends of the telescopic guide columns 4 are fixedly connected to the bottom of the upper mounting base 2. The upper mounting base 2 is fixedly connected to the stamping end of the stamping machine. The telescopic guide columns 4 play a precision guiding role in the stamping machine, ensuring that the upper mounting base 2 moves vertically without deviation, bearing lateral forces, improving stroke accuracy and mold life. At the same time, the telescopic structure adapts to different closing heights, facilitating mold replacement and maintenance.

[0031] A lower punching die 5 is bolted to the top of the lower mounting base 3. An upper punching die 6 is bolted to the bottom of the upper mounting base 2 relative to the position above the lower punching die 5. A first stamping die 7 and a second stamping die 8 are provided next to the lower punching die 5. The first stamping die 7 and the second stamping die 8 are used for arc pressing of copper sheets. The first stamping die 7 is bolted to the lower mounting base 3. A pair of secondary stamping dies 9 are fixedly connected to the top of the lower mounting base 3. The secondary stamping dies 9 are respectively located behind the first stamping die 7 and in front of the second stamping die 8. The secondary stamping dies 9 are used to stamp and form semi-finished clamps. A pushing mechanism is also provided for first lowering the second stamping die 8 and then pushing the material. An upper stamping die 10 is fixedly connected to the bottom of the upper mounting base 2 relative to the position above the first stamping die 7 and the second stamping die 8. A stamping head 11 is fixedly connected to both the front and rear sides of the upper stamping die 10.

[0032] An upper punch cutter 12 is fixedly connected to the middle of the upper punching die 10. The upper punch cutter 12 is used to divide the copper sheet into two parts. A lower punch cutter 13 is fixedly connected to the side wall of the upper punching die 6. The lower punch cutter 13 is located between the upper punching die 6 and the upper punching die 10.

[0033] The copper clamp stamping forming machine is driven by a servo motor to store energy in a flywheel. The flywheel is driven to rotate via a clutch, causing the slider and the upper mounting base 2 to reciprocate vertically. The copper sheet is precisely fed into the mold cavity by the feeding mechanism. The upper mounting base 2 moves down, causing the upper punching die 6 and the lower punching cutter 13 to punch down and instantly complete the cutting and punching. At the same time, the upper stamping die 10 is driven down to complete the arc pressing of the copper sheet on the first stamping die 7 and the second stamping die 8. The downward punching of the upper stamping die 10 will drive the upper punching cutter 12 to punch down, splitting the copper sheet in two (because the lower punching cutter 13 will punch and separate the copper sheet on the first stamping die 7 and the second stamping die 8 from the total copper sheet, the downward punching of the upper punching cutter 12 will split the copper sheet in two).

[0034] The feeding mechanism includes an electric telescopic cylinder 14, which is fixedly connected to the top of the stamping table 1. The output end of the electric telescopic cylinder 14 is fixedly connected to a drive block 15. An L-shaped plate 16 is fixedly connected to the top of the side wall of the drive block 15 (during the process of the copper sheet being pushed by the feeding system, the L-shaped plate 16 can position the copper sheet on the first stamping die 7 and the second stamping die 8). An extrusion plate 17 is provided below the L-shaped plate 16, and a connecting block 18 is fixedly connected between the extrusion plate 17 and the drive block 15. A straight groove 19 is provided on the side of the extrusion plate 17 near the first stamping die 7, and an inclined groove 20 is provided on the side of the extrusion plate 17 away from the L-shaped plate 16. A round rod 21 is fixedly connected to the side wall of the second stamping die 8. A flipping groove 22 is provided at the top of the straight groove 19. A flipping cylinder 23 is rotatably connected inside the flipping groove 22. A right-angled block 24 with an inclined surface is fixedly connected to the bottom of the flipping cylinder 23.

[0035] The inclined surface of the right-angle block 24 is flush with the inclined surface of the inclined groove 20, the round rod 21 is inserted into the inside of the straight groove 19, and the side wall of the flipping cylinder 23 abuts against the side wall of the flipping groove 22.

[0036] A spiral spring 25 is provided inside the tilting cylinder 23. One end of the spiral spring 25 is fixedly connected to the inner wall of the tilting cylinder 23, and the other end of the spiral spring 25 is fixedly connected to the side wall of the tilting groove 22.

[0037] A telescopic cylinder 26 is fixedly connected to the top of the lower mounting base 3 relative to the position below the second stamping die 8. A telescopic block 27 is fixedly connected to the bottom of the second stamping die 8. The telescopic block 27 is longitudinally slidably connected to the inside of the telescopic cylinder 26. Four return springs 28 are fixedly connected at equal intervals between the bottom end of the telescopic block 27 and the bottom end of the inner side of the telescopic cylinder 26.

[0038] After the copper sheet is stamped on the first stamping die 7 and the second stamping die 8 (it should be noted that during the stamping process, the round rod 21 is located in the straight groove 19, thus ensuring the fixed position of the second stamping die 8 and ensuring that the stamping of the copper sheet can be completed when the upper stamping die 10 presses down), the electric telescopic cylinder 14 can be controlled to start and drive the drive block 15, L-shaped plate 16, connecting block 18 and extrusion plate 17 to move backward (at this time, the L-shaped plate 16 will move to the secondary stamping die 9 behind, and during the stamping...). During the process, the clamp on the secondary stamping die 9 has been taken out by the stamping head 11, so it will not hinder the normal sliding of the L-shaped plate 16. Then the round rod 21 will slide out from the straight groove 19. During this process, since there is no flipping restriction on the front side of the right angle block 24, the round rod 21 will push the right angle block 24 to drive the flipping cylinder 23 to flip. During this process, since one end of the spiral spring 25 is fixed on the inner wall of the flipping cylinder 23 and the other end is fixed on the side wall of the flipping groove 22, the rotation of the flipping cylinder 23 will gradually compress the spiral spring 25.

[0039] Until the right-angle block 24 moves out from above the round rod 21, the pressure on the right-angle block 24 is released. At this time, the right-angle block 24 will be rotated and reset under the elastic force of the spiral spring 25. Then, the electric telescopic cylinder 14 can be controlled to drive the drive block 15 to move forward, thereby driving the L-shaped plate 16 and the extrusion plate 17 to move forward. At this time, since the right-angle block 24 and the flipping cylinder 23 are restricted by the inside of the flipping groove 22, they cannot be rotated backward. Therefore, the inclined surface of the right-angle block 24 will press the arc surface of the round rod 21. Moreover, since the telescopic block 27 on the second stamping die 8 can only slide longitudinally on the telescopic cylinder 26, the pressure of the inclined surface of the right-angle block 24 will press the round rod 21 and the second stamping die 8 to move downward, and drive the telescopic block 27 to move downward in the telescopic cylinder 26. At the same time, the reset spring 28 is compressed. Then the round rod 21 moves to the inclined groove 20 and is pressed downward by the inclined surface of the inclined groove 20. Then the round rod 21 moves to the bottom of the extrusion plate 17.

[0040] At this time, the L-shaped plate 16 will drive the semi-finished product clamp on the first stamping die 7 to move forward. At this time, due to the descent of the second stamping die 8, the corresponding semi-finished product clamp will also be driven to descend. Therefore, when the semi-finished product clamp on the first stamping die 7 moves forward, it will pass over the semi-finished product clamp on the second stamping die 8 and then be pushed onto the secondary stamping die 9 in front. At this time, the round rod 21 will move out from the bottom of the extrusion plate 17, thereby releasing the extrusion on the round rod 21. Then, under the elastic force of the return spring 28, the telescopic block 27 and the second stamping die 8 will be pushed to reset, and the corresponding semi-finished product clamp will be driven to move up and reset, so that the first stamping die 7 and the second stamping die 8 are aligned with each other. At this time, the round rod 21 moves to the side of the straight groove 19.

[0041] Finally, the electric telescopic cylinder 14 is activated to drive the drive block 15 to the rear. At this time, the round rod 21 will gradually insert into the straight groove 19. Then, when the L-shaped plate 16 resets, it will push the semi-finished clamp on the second stamping die 8 through the first stamping die 7 to the rear secondary stamping die 9. After the pushing is completed, the electric telescopic cylinder 14 is activated to drive the L-shaped plate 16 to reset (at this time, the round rod 21 is still located in the straight groove 19 and will not move out of the straight groove 19). Then, the feeding system is activated to feed copper sheets to the first stamping die 7 and the second stamping die 8, and then the stamping forming machine is activated. The upper mounting base 2 is moved down to press the copper sheet again. At the same time, the stamping head 11 is moved down to press the semi-finished clamp on the secondary stamping die 9. After forming, it is discharged through the discharge system on the stamping machine (the discharge system is a blower discharge mechanism, which uses pulsed airflow to spray out at high speed from the pipe to push the clamp and detach it from the stamping head 11, achieving near-net-shape forming and rapid discharge. This is a mature technology in the existing technology and will not be described in detail here). After the stamping is completed, the electric telescopic cylinder 14 can be started again to repeat the above operation to push the material.

[0042] In summary, the above structural design enables a near-net-shape solution for producing two parts in a single stamping operation. By simply doubling the width of the copper sheet being fed in, the first station simultaneously performs cutting and center seam trimming, splitting the copper sheet in two. Subsequently, under the operation of the pushing mechanism, the second stamping die 8 is driven to descend first, pushing out the semi-finished clamp on the first stamping die 7. The clamp is then pushed through the second stamping die 8 to the secondary stamping die 9 in front. During the reset process of the pushing mechanism, the second stamping die 8 is driven to reset, thereby pushing the semi-finished clamp on the second stamping die 8 through the first stamping die 7 and onto the secondary stamping die 9 in the rear. This achieves double output from a single machine, doubling the production capacity without the need for additional machines. Furthermore, the shared feeding and guiding system ensures consistent springback of the two curved surfaces, significantly optimizing material utilization and space occupation.

[0043] Based on the above embodiments, it was found during use that the copper sheet in the above structure is in a fixed position and can only be stamped into two fixed widths of clamps. However, in the process of processing power clamps, different widths of power clamps will be produced according to the actual needs of customers, so it cannot meet the production needs of users. In order to solve the above problems, the above structure has been further improved.

[0044] Two secondary stamping dies 9 are fixedly connected to a pair of positioning blocks 29 on opposite sides. A rectangular groove 30 is opened at the top of the lower punching die 5. A lower punching plate 31 is slidably connected inside the rectangular groove 30. Several positioning rods 32 are fixedly connected at equal intervals on both sides of the top of the lower punching plate 31.

[0045] The front side of the lower punching die 5 is threaded with a stud 33, the rear side of the stud 33 is rotatably connected to the front side of the lower punching plate 31, and the front side of the stud 33 is fixedly connected with a rotating head 34.

[0046] When two different widths of clamps need to be produced during the production process, the rotating head 34 drives the stud 33 to move spirally, thereby pushing the lower punching plate 31 to slide forward inside the rectangular groove 30 and driving multiple positioning rods 32 to move, thus changing the position of the lower punching plate 31. Then, the position of the upper punching die 6 is adjusted. During the stamping process, the width of the copper sheet on the first stamping die 7 will be smaller than the width of the copper sheet on the second stamping die 8. However, during the stamping process, both parts of the copper sheet are completely located on the first stamping die 7 and the second stamping die 8 (it should be noted that the width of the first stamping die 7 plus the second stamping die 8 is greater than the width of the copper sheet. Therefore, the adjusted copper sheet is completely located in the first stamping die 7 and the second stamping die 8, thus ensuring the accuracy of stamping). In the subsequent material pushing process, the clamps of different widths are operated in the same way as described above.

[0047] In summary, the above structural design not only ensures the accuracy of the copper sheet's position during transport, but also allows for adjustment of the lower punching plate 31 by rotating the stud 33. Subsequently, adjusting the position of the upper punching die 6 changes the position of the copper sheet between the first stamping die 7 and the second stamping die 8, enabling the stamping of two power clamps of different widths in one operation, thus improving the flexibility of the device.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.

[0049] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A near-net-shape forming mold for complex-shaped power fittings, comprising a stamping table (1), an upper mounting base (2), and a lower mounting base (3), characterized in that: The lower mounting base (3) is bolted to the stamping table (1). Telescopic guide columns (4) are fixedly connected to the four corners of the top of the lower mounting base (3). The telescopic ends of the telescopic guide columns (4) are fixedly connected to the bottom of the upper mounting base (2). The upper mounting base (2) is fixedly connected to the stamping end of the stamping machine. A lower punching die (5) is bolted to the top of the lower mounting base (3). An upper punching die (6) is bolted to the bottom of the upper mounting base (2) above the lower punching die (5). A first stamping die (7) and a second stamping die (8) are provided beside the lower punching die (5). The first stamping die (7) and the second stamping die (8) are used for arc pressing of the copper sheet. The first stamping die (7) is bolted to the lower mounting base (1). 3) The lower mounting base (3) is fixedly connected to a pair of secondary stamping dies (9) at its top end. The secondary stamping dies (9) are respectively located behind the first stamping die (7) and in front of the second stamping die (8). The secondary stamping dies (9) are used to stamp and form the semi-finished clamp. They are also provided with a pushing mechanism for first lowering the second stamping die (8) and then pushing the material. The bottom end of the upper mounting base (2) is fixedly connected to an upper stamping die (10) above the first stamping die (7) and the second stamping die (8). The upper stamping die (10) is fixedly connected to stamping heads (11) on both the front and rear sides. The upper stamping die (10) is fixedly connected to an upper cutting blade (12) in the middle. The upper cutting blade (12) is used to split the copper sheet in two. The pushing mechanism includes an electric telescopic cylinder (14), which is fixedly connected to the top of the stamping table (1). The output end of the electric telescopic cylinder (14) is fixedly connected to a drive block (15). The top of the side wall of the drive block (15) is fixedly connected to an L-shaped plate (16). An extrusion plate (17) is provided below the L-shaped plate (16), and a connecting block (18) is fixedly connected between the extrusion plate (17) and the drive block (15). A straight groove (19) is provided on the side of the extrusion plate (17) near the first stamping die (7), and an inclined groove (20) is provided on the side of the extrusion plate (17) away from the L-shaped plate (16). A round rod (21) is fixedly connected to the side wall of the second stamping die (8). A flipping groove (22) is provided at the top of the straight groove (19). A flipping cylinder (23) is rotatably connected to the inside of the flipping groove (22), and a right-angled block (24) with an inclined surface is fixedly connected to the bottom of the flipping cylinder (23).

2. The near-net-shape forming mold for complex-shaped power fittings according to claim 1, characterized in that: The upper punching die (6) has a lower punching cutter (13) fixedly connected to its side wall. The lower punching cutter (13) is positioned between the upper punching die (6) and the upper stamping die (10).

3. The near-net-shape forming mold for complex-shaped power fittings according to claim 1, characterized in that: The inclined surface of the right-angle block (24) is flush with the inclined surface of the inclined groove (20), the round rod (21) is inserted into the inside of the straight groove (19), and the side wall of the flipping cylinder (23) abuts against the side wall of the flipping groove (22).

4. The near-net-shape forming mold for complex-shaped power fittings according to claim 1, characterized in that: The inner side of the flipping cylinder (23) is provided with a spiral spring (25). One end of the spiral spring (25) is fixedly connected to the inner wall of the flipping cylinder (23), and the other end of the spiral spring (25) is fixedly connected to the side wall of the flipping groove (22).

5. The near-net-shape forming mold for complex-shaped power fittings according to claim 1, characterized in that: The top of the lower mounting base (3) is fixedly connected to a telescopic cylinder (26) at a position below the second stamping die (8). The bottom of the second stamping die (8) is fixedly connected to a telescopic block (27). The telescopic block (27) is longitudinally slidably connected to the inside of the telescopic cylinder (26). Four return springs (28) are fixedly connected at equal intervals between the bottom end of the telescopic block (27) and the bottom end of the telescopic cylinder (26).

6. The near-net-shape forming mold for complex-shaped power fittings according to claim 1, characterized in that: A pair of positioning blocks (29) are fixedly connected to the two secondary stamping dies (9) on opposite sides. A rectangular groove (30) is opened at the top of the lower punching die (5). A lower punching plate (31) is slidably connected to the inner side of the rectangular groove (30). Several positioning rods (32) are fixedly connected at equal intervals on both sides of the top of the lower punching plate (31).

7. The near-net-shape forming mold for complex-shaped power fittings according to claim 6, characterized in that: The lower punching die (5) has a through threaded stud (33) on its front side, and the stud (33) is rotatably connected to the front side of the lower punching plate (31) on its rear side. A rotating head (34) is fixedly connected to the front side of the stud (33).

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