Silver-copper contact cold heading forming device

Abstract

The utility model discloses a silver-copper contact cold heading forming device which comprises a crankshaft, a driving part is installed at the end of the crankshaft, the middle of the crankshaft is connected with a driving sliding block through a connecting rod, and one end of the driving sliding block is fixedly connected with a cold heading punch. The device comprises a cold heading punch, a crankshaft, a connecting rod, a transmission shaft, a deflection wheel and a supporting seat, the supporting seat is arranged on one side of the cold heading punch, the middle of the supporting seat is rotationally connected with two traction wheels used for conveying wires, and two double-head motors used for driving the traction wheels are installed in the supporting seat. Reciprocating stamping and circulating cutting feeding are achieved, manual operation is reduced, production efficiency is improved, and meanwhile consistency and quality of products are guaranteed. A circular hole with the diameter of 2mm can be formed in a workpiece through the conical structure at the end part of the ejector pin, and the ejector pin is convenient to turn outwards for riveting after being mounted, so that the contact is firmly mounted on an electrical component.

Description

Technical Field

[0001] The utility model relates to the technical field of silver-copper contact processing, in particular to a silver-copper contact cold heading forming device. Background Art

[0002] Silver-copper contacts refer to the intersections where they separate and contact each other during the opening and closing process of electronic appliances. They are usually made of a composite of silver and copper. They are widely used in the fields of electronics and electrical appliances due to their excellent conductivity, wear resistance and corrosion resistance. Both silver and copper are excellent conductors, allowing silver-copper contacts to effectively transmit current in circuits. During frequent opening and closing operations, silver-copper contacts can maintain good wear resistance and extend their service life. The production process of silver-copper contacts involves multiple links, among which cold heading is a common method. Cold heading belongs to the category of metal pressure processing, which applies external force to the metal at room temperature to form it in a predetermined mold.

[0003] The existing cold forging process for silver-copper contacts has a low degree of automation and requires multiple processes, which reduces its production efficiency. In addition, the ends of the silver-copper contacts processed by cold forging are solid structures, which are not convenient to turn outward and rivet after installation, and the contacts are prone to loosening when installed on electrical components. Utility Model Content

[0004] The utility model aims to provide a silver-copper contact cold heading forming device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a silver-copper contact cold heading forming device, comprising:

[0006] A crankshaft, wherein a driving part is installed at the end of the crankshaft, a driving slider is connected to the middle of the crankshaft through a connecting rod, and a cold heading punch is fixedly connected to one end of the driving slider;

[0007] A support seat, the support seat is placed on one side of the cold heading punch, the middle part of the support seat is rotatably connected with two sets of traction wheels for conveying wires, two double-headed motors for driving the traction wheels are installed inside the support seat, and one end of the two double-headed motors is drivingly connected with a deflection wheel;

[0008] A cutting part, which is disposed on one side of the support seat, and comprises two cutters which are slidably disposed on the outer side of the support seat, and a reset part is disposed at the end of the cutter, and the deflection wheel drives the cutter to reciprocate;

[0009] A clamping assembly, the clamping assembly is placed on the top of the support seat, the clamping assembly comprises a lifting drive cylinder slidably arranged above the support seat, and a pneumatic clamping claw is fixedly connected to the output end of the lifting drive cylinder;

[0010] The ejector pin slides into the mold cavity in the middle of the support base. A conical structure is provided at the end of the ejector pin for opening a round hole at the end of the silver-copper contact.

[0011] Preferably, it further includes a base. A U-shaped bracket is fixedly connected to the top of the base. The crankshaft is rotatably installed at the top of the U-shaped bracket. The driving slider is slidably installed inside the U-shaped bracket.

[0012] Preferably, the driving part includes a driving motor fixedly connected to the top of the base. The output end of the driving motor is drivingly connected to a driving pulley through a transmission belt. The center of the driving pulley is fixedly connected to the end of the crankshaft.

[0013] Preferably, one end of the double-headed motor is drivingly connected to a transmission shaft through a transmission box. The deviation wheel is fixedly connected to the transmission shaft.

[0014] Preferably, the reset part includes a guide rod fixedly connected to one end of the cutting knife. The guide rod is slidably connected to the support base. A pushing pressure plate is fixedly connected to one end of the guide rod. A first reset spring is sleeved outside the guide rod and between the support base and the pushing pressure plate.

[0015] Preferably, a transverse driving cylinder is fixedly connected to the top of the support base. The lifting driving cylinder is fixedly connected to the output end of the transverse driving cylinder.

[0016] Preferably, a limiting frame is fixedly connected to the middle of the support base. The ejector pin is slidably installed in the middle of the limiting frame. A limiting plate is fixedly connected to the outside of the ejector pin. A second reset spring is fixedly connected to the side of the limiting plate away from the support base.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: By integrating the driving part, the traction wheel, and the double-headed motor, the automation of the cold heading forming process of the silver-copper contact is realized. The use of the crankshaft, connecting rod, transmission shaft, and deviation wheel realizes reciprocating stamping and cyclic cutting and feeding, reducing manual operation, improving production efficiency, and at the same time ensuring the consistency and quality of the products; The movements of the cutting knife and the pneumatic clamping jaw are precisely controlled by the controller and the timer, ensuring the accuracy of cutting and clamping; The use of the reset spring and the limiting structure ensures the accurate reset of the cutting knife and the ejector pin after movement, improving the stability and reliability of the equipment; The conical structure at the end of the ejector pin can open a round hole with a diameter of 2 mm for the workpiece, which is convenient for outward flanging and riveting after installation, and enables the contact to be firmly installed on the electrical component. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of the pushing pressure plate of the present utility model;

[0020] Figure 3 This is a schematic structural diagram of the traction wheel of the present utility model;

[0021] Figure 4 This is a schematic structural diagram of the thimble of the present utility model;

[0022] Figure 5 This is a schematic internal structure diagram of the transmission box of the present utility model;

[0023] Figure 6 This is a schematic position structure diagram of the crankshaft of the present utility model;

[0024] Figure 7 This is a schematic structural diagram of the cold heading punch of the present utility model.

[0025] In the figure: 1. Base; 2. Driving motor; 3. Driving pulley; 4. Crankshaft; 5. Driving slider; 6. Cold heading punch; 7. Support seat; 8. Limiting plate; 9. Thimble; 10. Lifting driving cylinder; 11. Pneumatic gripper; 12. Cutting tool; 13. Transverse driving cylinder; 14. Traction wheel; 15. Double-headed motor; 16. Transmission box; 17. Transmission shaft; 18. Deflection wheel; 19. Pushing pressure plate; 20. First return spring; 21. Guide rod; 23. Limiting frame; 24. Second return spring. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1 、 2As shown in Figures 3, 4, 5, 6, and 7, the present utility model provides a technical solution: a cold heading forming device for silver-copper contacts, comprising: a crankshaft 4, with a driving part installed at the end of the crankshaft 4, the middle part of the crankshaft 4 is connected with a driving slider 5 through a connecting rod, and one end of the driving slider 5 is fixedly connected with a cold heading punch 6; a support base 7 is placed on one side of the cold heading punch 6 and is connected to the base 1 by bolts. Two sets of traction wheels 14 for conveying wire are rotatably connected in the middle of the support base 7. Each set of traction wheels 14 has two and is arranged one above the other. The upper traction wheel 14 is rotatably installed with a slider on one side, and the support base 7 is provided with a groove matching the slider. The top of the slider is rotatably connected with a screw rod, and a limiting frame is threadedly connected to the outside of the screw rod. The limiting frame is fixedly connected with the support base 7. The support base 7 is provided with wire conveying holes at the positions between the two traction wheels 14. The wire conveying holes are located at one end of the cutting knife 12. Two double-headed motors 15 for driving the traction wheels 14 are installed inside the support base 7. One end of the two double-headed motors 15 is drivingly connected with a deflector wheel 18; a cutting part is placed on one side of the support base 7. The cutting part includes two cutting knives 12 slidably arranged outside the support base 7. A reset part is arranged at the end of the cutting knife 12. The deflector wheel 18 drives the cutting knife 12 to reciprocate. A clamping assembly is placed on the top of the support base 7. The clamping assembly includes a lifting drive cylinder 10 slidably arranged above the support base 7. The output end of the lifting drive cylinder 10 is fixedly connected with a pneumatic gripper 11; a thimble 9 is slidably placed in the mold cavity in the middle of the support base 7. The end of the thimble 9 is provided with a conical structure for opening a round hole at the end of the silver-copper contact.

[0028] It should be noted that two guide tubes are provided on one side of the support base 7 of the present utility model, and the two guide tubes are respectively opposite to the positions where the upper and lower traction wheels 14 are in contact. The silver wire and the copper wire are passed through the middle of the guide tubes and between the traction wheels 14, and then passed through the wire conveying holes in the middle of the support base 7. The two double-headed motors 15 respectively drive the traction wheels 14, so that the traction wheels 14 convey the silver wire and the copper wire forward under the action of friction. At the same time, the double-headed motors 15 drive the deflector wheel 18 to rotate through the transmission shaft 17. The deflector wheel 18 makes the cutting knife 12 move towards the wire conveying hole by extrusion, so as to realize the cutting of the wire. Under the action of the timer and the controller, the pneumatic gripper 11 moves downward to clamp the wire, so that the wire is clamped after being cut. The pneumatic gripper 11 moves horizontally to align the cut silver wire with the mold cavity in the middle of the support base 7. The driving part drives the driving slider 5 to reciprocate through the crank, and the driving slider 5 drives the cold heading punch 6 to reciprocally extrude the mold cavity. The pneumatic gripper 11 clamping the silver wire places the silver wire at the corresponding position of the mold cavity first, and the cold heading punch 6 pushes it into the mold cavity. The other pneumatic gripper 11 places the copper wire at the corresponding position of the mold cavity, and the cold heading punch 6 pushes it into the mold cavity. Limited by the space of the mold cavity, under the extrusion of the cold heading punch 6, the silver wire and the copper wire are extruded into shape, and the conical structure at the end of the thimble 9 can open a round hole with a diameter of 2 mm for the workpiece, which is convenient for outward flanging riveting after installation, so that the contact is firmly installed on the electrical component.

[0029] Please refer to Figure 1 、 7 As shown, it further includes a base 1. A U-shaped bracket is fixedly connected to the top of the base 1. A crankshaft 4 is rotatably installed on the top of the U-shaped bracket. A driving slider 5 is slidably installed inside the U-shaped bracket. The driving part includes a driving motor 2 fixedly connected to the top of the base 1. The output end of the driving motor 2 is connected to a driving pulley 3 through a transmission belt. The center of the driving pulley 3 is fixedly connected to the end of the crankshaft 4.

[0030] It should be noted that a small pulley is fixedly connected to the output end of the driving motor 2 of the present utility model. The small pulley is connected to the driving pulley 3 through a transmission belt. The driving pulley 3 drives the crankshaft 4 to rotate. The crankshaft 4 drives the driving slider 5 to reciprocate inside the U-shaped bracket through a connecting rod. The driving slider 5 drives the cold heading punch 6 to reciprocally punch the die cavity.

[0031] Please refer to Figure 2 、 3 As shown in 5, one end of a double-headed motor 15 is connected to a transmission shaft 17 through a transmission box 16. A deflection wheel 18 is fixedly connected to the transmission shaft 17. The reset part includes a guide rod 21 fixedly connected to one end of a cutter 12. The guide rod 21 is slidably connected to a support seat 7. A push pressing plate 19 is fixedly connected to one end of the guide rod 21. A first reset spring 20 is sleeved outside the guide rod 21 and between the support seat 7 and the push pressing plate 19.

[0032] It should be noted that the traction wheels 14 driven by the double-headed motor 15 of the present utility model rotate. Under the action of pressure, the upper and lower traction wheels 14 drive the wire to be conveyed forward. At the same time, the other end of the double-headed motor 15 drives the transmission shaft 17 to rotate through the bevel gear set inside the transmission box 16. The transmission shaft 17 drives the deflection wheel 18 to rotate. When the deflection wheel 18 contacts the push pressing plate 19, under the action of extrusion, the push pressing plate 19 compresses the first reset spring 20 and pushes the guide rod 21 inward at the same time. The guide rod 21 pushes the cutter 12 towards the wire, so as to cut the wire through the cutter 12. When the deflection wheel 18 separates from the push pressing plate 19, the first reset spring 20 pulls the guide rod 21 and the cutter 12 to reset through the push pressing plate 19, facilitating the next cutting.

[0033] Please refer to Figure 2 As shown, a transverse driving cylinder 13 is fixedly connected to the top of the support seat 7. A lifting driving cylinder 10 is fixedly connected to the output end of the transverse driving cylinder 13.

[0034] It should be noted that while the present utility model is cutting, two lifting drive cylinders 10 drive the pneumatic grippers 11 to move downward, the pneumatic grippers 11 clamp the wire, and the lateral drive cylinder 13 drives the pneumatic gripper 11 clamping the silver wire to move towards the die cavity position, so that the silver wire corresponds to the cold heading punch 6. The cold heading punch 6 pushes it into the die cavity. The lifting drive cylinder 10 and the lateral drive cylinder 13 drive the pneumatic gripper 11 to reset. Then, another lateral drive cylinder 13 drives the pneumatic gripper 11 clamping the copper wire to correspond to the die cavity, and the cold heading punch 6 punches and forms it.

[0035] Please refer to Figure 3 、 4 As shown, a limit frame 23 is fixedly connected to the middle of the support base 7. The ejector pin 9 is slidably installed in the middle of the limit frame 23. A limit plate 8 is fixedly connected to the outside of the ejector pin 9, and a second return spring 24 is fixedly connected to the side of the limit plate 8 away from the support base 7.

[0036] It should be noted that when the silver wire is pushed into the die cavity in the present utility model, there is no impact contact with the ejector pin 9. When the copper wire enters, the ejector pin 9 is pushed to the extreme position of the moving position. Under the double punching extrusion of the cold heading punch 6 and the ejector pin 9, the product is punched and formed. At this time, the second return spring 24 is compressed. When the cold heading punch 6 is pulled out of the die cavity, the second return spring 24 resets and pushes the product out through the ejector pin 9, and it enters the storage box from the lower material guiding groove.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front part", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0038] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0039] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A silver-copper contact cold heading forming device, characterized in that: include: A crankshaft (4), wherein a driving portion is installed at the end of the crankshaft (4), a driving slider (5) is connected to the middle of the crankshaft (4) via a connecting rod, and a cold heading punch (6) is fixedly connected to one end of the driving slider (5); A support seat (7), the support seat (7) is placed on one side of the cold heading punch (6), the middle part of the support seat (7) is rotatably connected with two sets of traction wheels (14) for conveying wires, two double-headed motors (15) for driving the traction wheels (14) are installed inside the support seat (7), and one end of the two double-headed motors (15) is drivingly connected with a deflection wheel (18); A cutting part, the cutting part is arranged on one side of the support seat (7), the cutting part comprises two cutters (12) slidably arranged on the outside of the support seat (7), a reset part is arranged at the end of the cutter (12), and the deflection wheel (18) drives the cutter (12) to reciprocate; A gripping assembly, the gripping assembly being placed on the top of the support seat (7), the gripping assembly comprising a lifting drive cylinder (10) slidably arranged above the support seat (7), the output end of the lifting drive cylinder (10) being fixedly connected with a pneumatic clamping claw (11); An ejector pin (9) is slidably placed in a mold cavity in the middle of a support seat (7), and a cone structure is arranged at the end of the ejector pin (9) for opening a circular hole at the end of the silver-copper contact.

2. A silver-copper contact cold heading forming device according to claim 1, characterized in that: It also comprises a base (1), the top of the base (1) is fixedly connected to a U-shaped bracket, the crankshaft (4) is rotatably mounted on the top of the U-shaped bracket, and the driving slider (5) is slidably mounted on the inner side of the U-shaped bracket.

3. A silver-copper contact cold heading forming device according to claim 2, characterized in that: The driving part comprises a driving motor (2) fixedly connected to the top of the base (1); the output end of the driving motor (2) is connected to a driving pulley (3) via a driving belt, and the center of the driving pulley (3) is fixedly connected to the end of a crankshaft (4).

4. The silver-copper contact cold heading forming device according to claim 1, characterized in that: One end of the double-headed motor (15) is connected to a transmission shaft (17) through a transmission box (16), and the deflection wheel (18) is fixedly connected to the transmission shaft (17).

5. The silver-copper contact cold heading forming device according to claim 1, characterized in that: The reset portion comprises a guide rod (21) fixedly connected to one end of the cutter (12); the guide rod (21) is slidably connected to the support seat (7); one end of the guide rod (21) is fixedly connected to a push plate (19); a reset spring (20) is sleeved on the outer side of the guide rod (21) and located between the support seat (7) and the push plate (19).

6. A silver-copper contact cold heading forming device according to claim 5, characterized in that: The top of the support seat (7) is fixedly connected to a transverse driving cylinder (13), and the lifting driving cylinder (10) is fixedly connected to the output end of the transverse driving cylinder (13).

7. The silver-copper contact cold heading forming device according to claim 1, characterized in that: The middle part of the support seat (7) is fixedly connected to a limit frame (23), the ejector pin (9) is slidably mounted on the middle part of the limit frame (23), the outer side of the ejector pin (9) is fixedly connected to a limit plate (8), and a No. 2 return spring (24) is fixedly connected to the side of the limit plate (8) facing away from the support seat (7).

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