Silver wire contact forming mold

Abstract

The present invention discloses a silver wire contact forming mold, including a mold body, the mold body includes an upper mold and a lower mold, and the upper surface of the lower mold is sequentially formed with a punching station, a silver wire vertical conveying station, a silver wire cutting station, and a riveting and forming station; the punching station, the silver wire vertical conveying station, the silver wire cutting station, and the riveting and forming station are sequentially located in the material belt conveying direction; the mold body is provided with a vertical wire feeding mechanism for vertically ejecting the silver wire into the material belt through hole, a tangent mechanism for cutting the silver wire into strip silver particles, and a riveting and forming mechanism for stamping and deforming the strip silver particles into I-shaped silver contacts; the vertical wire feeding mechanism and the tangent mechanism are located below the silver wire cutting station; the riveting and forming mechanism is located above the riveting and forming station. The present application ensures the concentricity of the silver particles in the spring riveting through hole by vertical wire feeding, thereby improving the riveting quality of the electrical contact.

Description

Technical Field

[0001] The present invention relates to a contact assembly technology, in particular to a silver wire contact forming die. Background Art

[0002] Silver contacts refer to the intersections where electronic devices separate and contact when they are opened and closed. These silver contacts need to be riveted to the springs. Currently, the main method for assembling silver contacts on springs is to automatically rivet the silver contacts using a punch press. This process generally involves a stamping die for riveting the silver contact material onto the springs using a press, and a horizontal linear vibrating feeder for vibrating the silver contact material into the stamping die. The existing silver contact material is prefabricated into a nail shape. A horizontal linear vibrating feeder feeds the nail-shaped silver contact material into the mounting hole on the spring. The material is then punched and riveted using the upper and lower platens of the press, forming an "I"-shaped silver contact on the spring.

[0003] However, the existing punch automatic riveting silver contact device has the following defects:

[0004] (1) Existing silver contact materials need to be pre-made into nail-shaped silver contact materials, that is, silver wire needs to be made through processes such as upsetting, post-processing, and heat treatment. The processing steps of nail-shaped silver contact materials are many, the production is complicated, the process quality is difficult to control, the cost is high, and the efficiency is low.

[0005] (2) The existing horizontal feeding method of silver contact materials is relatively complicated. Before riveting, a vibrating plate, a linear guide rail, and compressed air are required to feed the nail-shaped silver contact material into the mold cavity. In addition, the direction of the nail-shaped silver contact needs to be screened during the feeding process. The nail needs to be kept horizontally downward to be introduced into the mounting hole of the shrapnel. Therefore, the aperture of the mounting hole needs to be set large to facilitate smooth feeding.

[0006] (3) During the stamping process, the diameter of the rivet rod used on the press is smaller than that of the silver contact. In addition, the silver contact itself is small in size. When the upper and lower pressure plates are pressed together, the rivet rod cannot accurately hit the center of the silver contact. In addition, under the larger mounting hole, the silver contact is easily dislocated, resulting in uneven force on the silver contact, resulting in low concentricity between the upper and lower surfaces of the silver contact after riveting, and poor riveting quality. Summary of the Invention

[0007] In order to overcome the deficiencies of the prior art, the present invention aims to provide a silver wire contact forming die.

[0008] The object of the present invention is achieved by the following technical solution: a silver wire contact forming mold, characterized in that it includes a mold body, the mold body includes an upper mold and a lower mold, the upper surface of the lower mold is sequentially formed with a punching station, a silver wire vertical conveying station, a silver wire cutting station, and a riveting and forming station; the punching station, the silver wire vertical conveying station, the silver wire cutting station, and the riveting and forming station are sequentially located in the direction of material conveyance;

[0009] The mold body is provided with a vertical wire feeding mechanism for vertically ejecting the silver wire into the through hole of the material strip, a tangent mechanism for cutting the silver wire into strip-shaped silver particles, and a press riveting forming mechanism for punching and deforming the strip-shaped silver particles into I-shaped silver contacts; the vertical wire feeding mechanism and the tangent mechanism are located below the silver wire cutting station; the press riveting forming mechanism is located above the riveting forming station.

[0010] Furthermore, the vertical wire feeding mechanism includes a material guide, two wire feeding wheels, two rotating shafts, and two groups of drive assemblies; a wire cavity is provided in the material guide, and the silver wire is installed in the wire cavity of the material guide; the two wire feeding wheels are symmetrically arranged, and a wire clamping cavity is formed in the wheel surfaces of the two wire feeding wheels, and the wire clamping cavity is connected to the wire cavity of the material guide; the two wire feeding wheels are respectively mounted on the rotating shaft, and the two groups of drive assemblies respectively drive the two rotating shafts to rotate, and the rotating shaft drives the two wire feeding wheels to rotate synchronously, wherein the rotation directions of the two wire feeding wheels are opposite; the wheel surface of one wire feeding wheel is in contact with the wheel surface of the other wire feeding wheel, and through the rotation of the two wire feeding wheels, the silver wire is pushed toward the wire outlet side by friction and extrusion.

[0011] Furthermore, each group of the driving components includes a wire feeding transmission rod, a wire feeding transmission block, a wire feeding reset spring, and a one-way wheel; the one-way wheel sleeve is arranged on the rotating shaft and installed on one side of the wire feeding transmission block; the wire feeding transmission rod is arranged in the mold cavity of the lower mold, and is pressed by the upper punch rod located in the mold cavity of the upper mold to move downward and abut against the side of the wire feeding transmission block away from the one-way wheel; the wire feeding reset spring is arranged below the wire feeding transmission block to provide a restoring force for resetting the wire feeding transmission block.

[0012] Furthermore, the vertical wire feeding mechanism also includes a wire feeding length adjustment block, which is provided with a spring installation cavity; the wire feeding reset spring is installed in the spring installation cavity, and one end of the wire feeding reset spring abuts against the wire feeding transmission block.

[0013] Furthermore, the vertical wire feeding mechanism also includes a mounting base for mounting a material guide and two wire feeding wheels and a fixing frame for mounting two rotating shafts.

[0014] Furthermore, the tangent mechanism includes a movable knife block, a fixed blade, a knife block fixing block, a movable slider, a knife insert, and a tangent return spring; a knife block mounting cavity is recessed on the top of the material guide, and the movable knife block is installed in the knife block mounting cavity; the fixed blade is located on the upper surface of the movable blade and is fixedly limited in the blade fixing block, and the blade fixing block is fixedly limited in the mold cavity of the lower mold and is located on the upper surface of the movable slider; the movable slider is sleeved on the outer wall of the material guide, and the knife insert is located on the top of the movable slider. When the knife insert moves downward, the movable slider drives the material guide to move horizontally, and the movable knife block and the fixed blade on the top of the material guide undergo relative horizontal displacement; the tangent return spring is arranged in the mold cavity of the lower mold, and one end abuts on the movable slider to provide a restoring force for the reset of the movable slider.

[0015] Furthermore, the riveting forming mechanism includes an upper riveting block and a lower riveting block; the upper riveting block is installed in the membrane cavity of the upper membrane, and the lower riveting block is installed in the mold cavity of the lower membrane; the upper riveting block is located directly above the lower riveting block, and an I-shaped punching cavity is provided on the contact surface between the lower riveting block and the upper riveting block.

[0016] Furthermore, a plurality of riveting and forming stations are provided on the upper surface of the lower mold.

[0017] Furthermore, the silver wire contact forming mold also includes a stamping station arranged after the riveting forming station, and the stamping station is provided with a stamping mechanism for punching out the shape of a spring in the material strip; the stamping mechanism includes a plurality of upper stamping blocks designed according to the product shape and structure and lower stamping blocks used to match the upper stamping blocks.

[0018] Furthermore, the silver wire contact forming die also includes a slitting station arranged after the stamping station, and the slitting station is provided with a slitting mechanism for cutting and peeling the formed spring pieces; the slitting mechanism includes an upper splitting punch and a discharge chute.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This application uses a silver wire contact forming mold, adding a vertical wire feeding mechanism and a wire cutting mechanism to the mold. The silver wire is fed vertically, then cut, and then riveted and formed in one go by a riveting mechanism. The vertical wire feeding method ensures the concentricity of the silver particles within the shrapnel riveted through-hole, improving the riveting quality and precision. In addition, the vertical wire feeding method ensures the concentricity of the silver particles within the shrapnel riveted through-hole. At the same time, the aperture of the riveted through-hole on the shrapnel can be designed to be smaller, ensuring that the silver particles are not easily dislocated, avoiding the subsequent poor riveting quality due to uneven force on the silver contacts.

[0021] (2) The vertical wire feeding mechanism and the wire cutting mechanism are combined in the same workstation, eliminating the existing silver wire contact forming mold vibration plate, linear guide rail, compressed air and other horizontal rivet feeding workstations, making the device simpler.

[0022] (3) The design of this device eliminates the need for the existing silver contact material to be pre-made into a nail-shaped silver contact material. The manufacturing process is simple, the quality and precision of the electrical contact are high, the process is controllable, the cost is low, and the efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a silver wire contact forming mold according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a first longitudinal cross-sectional schematic diagram of a silver wire contact forming mold according to a preferred embodiment of the present invention;

[0025] Figure 3 for Figure 2 A magnified schematic diagram of area A in the middle;

[0026] Figure 4 for Figure 2 A magnified schematic diagram of area B in the middle;

[0027] Figure 5 for Figure 2 Enlarged schematic diagram of the middle C area;

[0028] Figure 6 for Figure 2 Enlarged schematic diagram of region D in the middle;

[0029] Figure 7 for Figure 2 Enlarged schematic diagram of the middle E area;

[0030] Figure 8 This is a second longitudinal cross-sectional schematic diagram of a silver wire contact forming mold according to a preferred embodiment of the present invention;

[0031] Figure 9 for Figure 8 Enlarged schematic diagram of the middle F area;

[0032] Figure 10 This is a partial structural diagram of a vertical wire feeding mechanism according to a preferred embodiment of the present invention;

[0033] Figure 11 This is a structural diagram of a mounting base in a vertical wire feeding mechanism according to a preferred embodiment of the present invention;

[0034] Figure 12 This is a third longitudinal cross-sectional schematic diagram of a silver wire contact forming mold according to a preferred embodiment of the present invention;

[0035] Figure 13 for Figure 12 Schematic diagram of the magnified G region in the middle.

[0036] In the figure: 100, mold body; 101, upper mold; 102, lower mold; 1, punching mechanism; 11, upper punching stripping insert; 12, punching lower knife block; 13, punching needle; 2, vertical wire feeding mechanism; 21, material guide; 22, wire feeding wheel; 23, rotating shaft; 24, wire feeding transmission rod; 25, wire feeding transmission block; 26, one-way wheel; 27, wire feeding return spring; 28, upper punch rod; 29, wire feeding length adjustment block; 210, mounting seat; 2101, material guide limit cavity; 2102, wire feeding wheel limit cavity; 2103, rotating shaft limit cavity; 211, fixing frame; 212, auxiliary latch rod; 21 3. Auxiliary latch transmission rod; 3. Tangent mechanism; 31. Moving knife block; 32. Fixed blade; 33. Knife block fixing block; 34. Moving slider; 35. Insert knife; 36. Tangent reset spring; 4. Riveting and forming mechanism; 41. Upper riveting block; 42. Lower riveting block; 43. I-shaped punching cavity; 5. Punching mechanism; 51. Punching block; 6. Slitting mechanism; 61. Upper splitting punch; 62. Discharge chute; a. Punching station; b. Silver wire vertical conveying station; c. Silver wire cutting station; d. Riveting and forming station; e. Punching station; f. Slitting station; H. Material strip; Y1. Silver wire; Y2. Silver particles. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0038] like Figure 1-13 As shown, a silver wire contact forming mold includes a mold body 100, which includes an upper mold 101 and a lower mold 102. The upper and lower molds are guided by guide pillars and guide sleeves. The upper surface of the lower mold is sequentially formed with a punching station a, a silver wire vertical conveying station b, a silver wire cutting station c, a riveting and forming station d, a stamping station e, and a slitting station f. The punching station, silver wire vertical conveying station, silver wire cutting station, riveting and forming station, stamping station e, and slitting station f are sequentially located in the conveying direction of the material strip H.

[0039] The mold body is provided with a punching mechanism 1 for punching holes on the material strip, a vertical wire feeding mechanism 2 for vertically ejecting the silver wire into the through hole of the material strip, a cutting mechanism 3 for cutting the silver wire Y1 into strip silver particles Y2, a riveting forming mechanism 4 for punching the strip silver particles into I-shaped silver contacts, a punching mechanism 5 for punching out the shape of a spring in the material strip; a slitting mechanism 6 for cutting and peeling the formed spring pieces, such as Figure 2-8 shown.

[0040] Among them, such as Figure 3As shown, a punching mechanism 1 is provided on the punching station, and the punching mechanism 1 includes an upper punching stripping insert 11 located in the upper die cavity and a punching lower knife block 12 located in the lower die cavity; a punching needle 13 is provided in the upper punching stripping insert; when the upper die moves downward and the upper punching stripping insert is pressed down, the punching needle is pushed out, and the material strip to be punched on the punching station is punched through to form a through hole for the silver wire to extend into, waiting to be cut and riveted into a silver contact.

[0041] The silver wire vertical conveying station is provided with a vertical wire feeding mechanism 2 and a wire cutting mechanism 3, and the vertical wire feeding mechanism and the wire cutting mechanism are located below the silver wire cutting station.

[0042] Specifically, if Figure 4 , as shown in 8-9, 10-13, the vertical wire feeding mechanism 2 includes a material guide 21, two wire feeding wheels 22, two rotating shafts 23, and two groups of driving components; a wire cavity is provided in the material guide, and the silver wire is installed in the wire cavity of the material guide; the two wire feeding wheels are symmetrically arranged, and a wire clamping cavity is formed in the wheel surfaces of the two wire feeding wheels, and the wire clamping cavity is connected to the wire cavity of the material guide; the two wire feeding wheels are respectively mounted on the rotating shaft, and the two groups of driving components respectively drive the two rotating shafts to rotate, and the rotating shaft drives the two wire feeding wheels to rotate synchronously, wherein the rotation directions of the two wire feeding wheels are opposite; the wheel surface of one wire feeding wheel is in contact with the wheel surface of the other wire feeding wheel, and through the rotation of the two wire feeding wheels, the silver wire is pushed toward the outlet side by friction and extrusion to achieve the purpose of wire feeding.

[0043] Each group of the driving components includes a wire feeding transmission rod 24, a wire feeding transmission block 25, a one-way wheel 26, and a wire feeding reset spring 27; the one-way wheel sleeve is arranged on the rotating shaft and installed on one side of the wire feeding transmission block; the wire feeding transmission rod is arranged in the mold cavity of the lower mold, and is pressed by the upper punch rod 28 located in the mold cavity of the upper mold to move downward and abut against the side of the wire feeding transmission block away from the one-way wheel; the wire feeding reset spring is arranged below the wire feeding transmission block to provide a restoring force for resetting the wire feeding transmission block.

[0044] When the two upper punch rods 28 located on the upper die move downward synchronously, the two upper punch rods 28 punch onto the wire feeding transmission rod, the wire feeding transmission rod moves downward, and abuts against one side of the wire feeding transmission block and moves downward along the tangential direction of the corresponding rotating shaft. The wire feeding reset spring 27 located under the wire feeding transmission block is compressed, and the one-way wheels on the two wire feeding transmission blocks drive the corresponding wire feeding wheels 22 to rotate synchronously in the opposite direction. The silver wire is pushed out to the wire outlet side by the friction force and extrusion of the wheel surface of the wire feeding wheel, and extends into the through hole punched by the punching mechanism on the material strip, waiting for the silver wire to be cut.

[0045] The vertical wire feeding mechanism also includes a wire feeding length adjustment block 29, which contains a spring mounting cavity. A wire feeding reset spring is mounted within this cavity, one end of which abuts the wire feeding transmission block. Driven by the upper diaphragm, the wire feeding transmission rod 24 moves downward, pressing down on the wire feeding transmission block 25, which in turn drives the wire feeding wheel 22 to rotate synchronously in the opposite direction. The wire feeding length adjustment block 29 adjusts the distance of the wire feeding transmission block by adjusting the distance of the wire feeding reset spring, thereby adjusting the rotation amplitude of the wire feeding wheel and ultimately adjusting the length of the wire feeding.

[0046] In addition, the vertical wire feeding mechanism also includes a mounting seat 210 for mounting a material guide and two wire feeding wheels, and a fixed frame 211 for mounting two rotating shafts. The mounting seat is provided with a material guide limiting cavity 2101, a wire feeding wheel limiting cavity 2102, and a rotating shaft limiting cavity 2103. During installation, the material guide and the wire feeding wheel are installed in the corresponding limiting cavities, the middle parts of the two rotating shafts are inserted into the rotating shaft limiting cavity of the mounting seat, and the two ends of the two rotating shafts are mounted on the fixed frame, but both rotating shafts can rotate freely on the mounting seat and the fixed frame. The mounting seat can be slidably mounted in the fixed frame, and a gap is left between the mounting seat and the fixed frame. An auxiliary latch rod 212 is provided above the gap, and an auxiliary latch transmission rod 213 is provided directly above the auxiliary latch rod. The auxiliary latch drive rod is installed in the mold cavity of the upper mold, and the auxiliary latch rod is installed in the mold cavity of the lower mold. When the upper mold moves downward, the auxiliary latch drive rod presses down on the auxiliary latch rod, which moves downward and extends into the gap between the mounting seat and the fixed frame, pushing the mounting seat along the axial direction of the rotating shaft on the fixed frame. The structural design and position of the mounting seat, fixed frame, auxiliary latch rod, and auxiliary latch drive rod coordinate with the movement of the movable slider in the tangent mechanism, ensuring that the silver wire is not pulled or broken during the tangent process, ensuring the continuity of wire feeding and the quality of the wire.

[0047] like Figure 4 As shown in Figures 8-9, a tangent mechanism 3 is provided on the silver wire cutting station. Specifically, the tangent mechanism 3 includes a movable knife block 31, a fixed blade 32, a knife block fixing block 33, a movable slider 34, a knife inserting knife 35, and a tangent return spring 36; a knife block mounting cavity is recessed on the top of the material guide, and the movable knife block is installed in the knife block mounting cavity; the fixed blade is located on the upper surface of the movable blade and is fixedly limited in the blade fixing block, and the blade fixing block is fixedly limited in the lower mold cavity and is located on the upper surface of the movable slider; the movable slider is sleeved on the outer wall of the material guide, and the knife inserting knife is located at the top of the movable slider. When the knife inserting knife moves downward, the movable slider drives the material guide to move horizontally, and the movable knife block and the fixed blade on the top of the material guide are relatively horizontally displaced; the tangent return spring is arranged in the mold cavity of the lower mold, and one end abuts on the movable slider to provide a restoring force for the reset of the movable slider.

[0048] The insert knife and the auxiliary latch transmission rod are both located in the mold cavity of the upper mold. When the upper mold moves downward, the insert knife and the auxiliary latch transmission rod simultaneously abut against the movable slider and the mounting seat, synchronously driving the movable slider and the mounting seat to move in the same direction. At this time, the material guide located in the movable block and the mounting seat moves synchronously, and the movable knife block located on the top of the material guide moves accordingly, and a relative horizontal displacement occurs with the fixed blade, thereby achieving the purpose of silver wire cutting.

[0049] like Figure 5 As shown, a press riveting and forming mechanism 4 is provided at the riveting and forming station. The press riveting and forming mechanism 4 comprises an upper riveting block 41 and a lower riveting block 42; the upper riveting block is installed in the film cavity of the upper film, and the lower riveting block is installed in the mold cavity of the lower film; the upper riveting block is located directly above the lower riveting block, and an I-shaped punching cavity 43 is provided on the contact surface between the lower riveting block and the upper riveting block.

[0050] As a further preferred embodiment, the upper surface of the lower mold is provided with a plurality of riveting and pressing stations. The design of the plurality of riveting and pressing stations enables the silver particles to have a more uniform and smooth surface after multiple riveting and pressing.

[0051] When the upper die moves downward, the upper riveting block abuts against the lower riveting block, and the silver particles left on the through-holes of the material strip after cutting are riveted to the I-shaped electrical contacts, thereby achieving the purpose of riveting.

[0052] like Figure 6 As shown, the stamping station is provided with a stamping mechanism 5 for stamping out the shape of the spring piece in the material strip. The stamping mechanism includes a plurality of upper stamping blocks 51 designed according to the shape and structure of the product and lower stamping blocks (not shown in the figure) used in conjunction with the upper stamping blocks; the upper stamping blocks are installed in the film cavity of the upper film, and the lower stamping blocks, if any, are installed in the die cavity of the lower film; the upper stamping blocks are located directly above the lower stamping blocks.

[0053] like Figure 7 As shown, the slitting station is provided with a slitting mechanism 6 for cutting and peeling the formed spring pieces. The slitting mechanism 6 includes an upper splitting punch 61 and a discharge chute 62; the upper splitting punch is installed in the film cavity of the upper film, and the discharge chute is provided in the die cavity of the lower film; the upper splitting punch is located directly above the discharge chute.

[0054] When the upper die moves downward, the shrapnel with riveted electrical contacts is cut and peeled off by the cutting upper splitting punch, and falls into the discharge chute for collection, thus completing the production of the shrapnel.

[0055] Taking the vehicle seat switch spring as an example, the conventional process for the vehicle seat switch spring is to use silver alloy rivets to press them, and use a vibration plate, linear guide rails, and compressed air to horizontally feed the rivets into the mold cavity, completing the horizontal rivet feeding method. In this embodiment, the device of the present invention is used to produce I-shaped rivets by vertical wire feeding, eliminating the complex production process of conventional silver alloy rivets. This process is simple, and the finished product has high concentricity, high precision, and good quality of the electrical contacts. The specific vertical wire feeding processing process specifically includes the following steps:

[0056] (1) Punching: The material strip enters the mold from one side of the punching station. When the upper mold moves downward, the upper punching stripper insert 11 is pressed down, and the punch needle 13 is pushed out, punching through the material strip to be punched on the punching station to form a through hole for the silver wire to be inserted and wait for cutting and riveting to form silver contacts; after the punching process, the material strip continues to move to the other side and enters the silver wire cutting station.

[0057] (2) Vertical wire feeding: After entering the silver wire cutting station, when the two upper punch rods 28 located on the upper die move downward synchronously, the two upper punch rods 28 punch onto the wire feeding transmission rod 24, and the wire feeding transmission rod 24 moves downward and abuts against one side of the wire feeding transmission block 24 and moves downward along the tangential direction of the corresponding rotating shaft 23. The wire feeding reset spring 27 located under the wire feeding transmission block 25 is compressed, and the one-way wheels 26 on the two wire feeding transmission blocks 25 drive the corresponding wire feeding wheels 22 to rotate synchronously in the opposite direction. The silver wire is pushed out to the wire outlet side by the friction force and extrusion of the wheel surface of the wire feeding wheel 22, and extends into the through hole punched by the punching mechanism on the material strip, waiting for the silver wire to be cut.

[0058] (3) Cutting: The insert knife 35 and the auxiliary latch drive rod 213 are both located in the mold cavity of the upper mold. When the upper mold moves downward, the insert knife 35 and the auxiliary latch drive rod 213 simultaneously contact the movable slider 34 and the mounting seat 210, and synchronously drive the movable slider 34 and the mounting seat 210 to move in the same direction. At this time, the material guide 21 located in the movable block and the mounting seat moves synchronously, and the movable blade block 31 located on the top of the material guide moves accordingly, and is horizontally displaced relative to the fixed blade 32, achieving the purpose of silver wire cutting. After the silver wire cutting process, the material strip continues to move to the other side and enters the riveting and forming station.

[0059] (4) Riveting: When the upper die moves downward, the upper riveting block 41 contacts the lower riveting block 42, riveting the silver particles left in the through-holes of the strip after cutting to the I-shaped electrical contacts, thus achieving the purpose of riveting. After the riveting forming process, the strip continues to move to the other side and enters the stamping station.

[0060] (5) Stamping: When the upper die moves downward, the upper punch block 51 contacts the strip on the surface of the lower die, punching the strip into the shape of the required spring, such as the spring outline, bent spring, etc. This process is a conventional operation. After the overall shape of the spring is processed, the strip continues to move to the other side and enters the slitting station.

[0061] (6) Cutting and stripping: When the upper die moves downward, the springs to which the electrical contacts have been riveted are cut and stripped by the cutting upper splitting punch 61, and fall into the discharge chute for collection, thus completing the production of the springs.

[0062] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A silver wire contact forming mold, characterized in that: The mold body includes an upper mold and a lower mold, and a punching station, a silver wire vertical conveying station, a silver wire cutting station, and a riveting and pressing molding station are sequentially formed on the upper surface of the lower mold; the punching station, the silver wire vertical conveying station, the silver wire cutting station, and the riveting and pressing molding station are sequentially located in the conveying direction of the material belt; The mold body is provided with a vertical wire feeding mechanism for vertically ejecting the silver wire into the through hole of the material strip, a wire cutting mechanism for cutting the silver wire into strip-shaped silver particles, and a riveting forming mechanism for punching and deforming the strip-shaped silver particles into I-shaped silver contacts; the vertical wire feeding mechanism and the wire cutting mechanism are located below the silver wire cutting station; the riveting forming mechanism is located above the riveting forming station; The vertical wire feeding mechanism comprises a material guide, two wire feeding wheels, two rotating shafts, and two groups of driving components; a wire cavity is provided in the material guide, and the silver wire is installed in the wire cavity of the material guide; the two wire feeding wheels are symmetrically arranged, and a wire clamping cavity is formed in the wheel surfaces of the two wire feeding wheels, and the wire clamping cavity is connected with the wire cavity of the material guide; the two wire feeding wheels are respectively sleeved on the rotating shaft, and the two groups of driving components respectively drive the two rotating shafts to rotate, and the rotating shaft drives the two wire feeding wheels to rotate synchronously, wherein the rotation directions of the two wire feeding wheels are opposite; the wheel surface of one wire feeding wheel is in contact with the wheel surface of the other wire feeding wheel, and through the rotation of the two wire feeding wheels, the silver wire is pushed out to the outlet side by friction and extrusion; Each set of the driving components includes a wire feeding transmission rod, a wire feeding transmission block, a wire feeding reset spring, and a one-way wheel; the one-way wheel sleeve is arranged on the rotating shaft and installed on one side of the wire feeding transmission block; the wire feeding transmission rod is arranged in the mold cavity of the lower mold, and is pressed by the upper punch rod located in the mold cavity of the upper mold to move downward and abut against the side of the wire feeding transmission block away from the one-way wheel; the wire feeding reset spring is arranged below the wire feeding transmission block to provide a restoring force for resetting the wire feeding transmission block; The vertical wire feeding mechanism also includes a wire feeding length adjustment block, in which a spring installation cavity is provided; the wire feeding reset spring is installed in the spring installation cavity, and one end of the wire feeding reset spring abuts against the wire feeding transmission block; The tangent mechanism includes a movable knife block, a fixed blade, a knife block fixing block, a movable slider, a knife insert, and a tangent reset spring; a knife block mounting cavity is recessed on the top of the material guide, and the movable knife block is mounted in the knife block mounting cavity; the fixed blade is located on the upper surface of the movable blade and is fixedly limited in the blade fixing block, and the blade fixing block is fixedly limited in the lower mold cavity and is located on the upper surface of the movable slider; the movable slider is sleeved on the outer wall of the material guide, and the knife insert is located on the top of the movable slider. When the knife insert moves downward, the movable slider drives the material guide to move horizontally, and the movable knife block and the fixed blade on the top of the material guide are relatively horizontally displaced; the tangent reset spring is arranged in the cavity of the lower mold, and one end of it abuts on the movable slider to provide a restoring force for the reset of the movable slider.

2. The silver wire contact forming mold according to claim 1, characterized in that: The vertical wire feeding mechanism also includes a mounting seat for mounting a material guide and two wire feeding wheels and a fixing frame for mounting two rotating shafts.

3. The silver wire contact forming mold according to claim 1, characterized in that: The riveting forming mechanism comprises an upper riveting block and a lower riveting block; the upper riveting block is installed in the die cavity of the upper die, and the lower riveting block is installed in the die cavity of the lower die; the upper riveting block is located directly above the lower riveting block, and an I-shaped punching cavity is provided on the contact surface between the lower riveting block and the upper riveting block.

4. The silver wire contact forming mold according to claim 3, characterized in that: The upper surface of the lower die is provided with a plurality of riveting and pressing forming stations.

5. The silver wire contact forming mold according to any one of claims 1 to 4, characterized in that: The silver wire contact forming mold also includes a stamping station arranged after the riveting forming station, and the stamping station is provided with a stamping mechanism for punching out a spring shape in the material strip; the stamping mechanism includes a plurality of upper stamping blocks designed according to the product shape and structure and lower stamping blocks used in matching with the upper stamping blocks.

6. The silver wire contact forming mold according to any one of claims 1 to 4, characterized in that: The silver wire contact forming die also includes a slitting station arranged after the stamping station, and the slitting station is provided with a slitting mechanism for cutting and peeling the formed spring pieces; the slitting mechanism includes an upper splitting punch and a discharge chute.

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