One-die three-punch cold heading contact machine

Abstract

The application discloses a three-stroke cold heading contact machine, which comprises a rack, a cross-shaped punch frame, a positioning die, a transmission mechanism, a conveying mechanism and a shearing mechanism, wherein the transmission mechanism comprises a main transmission mechanism, the main transmission mechanism comprises a transmission motor, a crankshaft and a crankshaft pulley, the transmission motor is in transmission connection with the crankshaft pulley, and the crankshaft pulley is fixed on one side of the crankshaft; a pinion is fixed on the other side of the crankshaft; a driven transmission mechanism comprises a transmission shaft, a sliding groove disc, a heading lifting connecting rod assembly, a lifting rocker arm assembly and a middle punch holder, one side of the middle punch holder is connected with the cross-shaped punch frame, the other side of the middle punch holder is fixed with a heading assembly, a large gear meshing with the pinion is arranged on one side of the transmission shaft, the sliding groove disc is fixed on the inner side of the large gear, one end of the heading lifting connecting rod assembly is matched with the sliding groove disc, the other end of the heading lifting connecting rod assembly is hinged with the lifting rocker arm assembly, and the middle punch holder is hinged with the lifting rocker arm assembly. The whole structure of the application is simple.

Description

Technical Field

[0001] This invention relates to the technical field of cold heading technology, and particularly to a three-stroke cold heading contact machine. Background Technology

[0002] The contacts are mounted on the spring sheet to achieve the function of conducting electricity. Therefore, they are generally stamped together with a silver layer and a metal substrate. With social development and the rise of automation, the requirements for contact production and processing are very high. However, the contacts produced by the traditional one-die two-stamping machine are difficult to meet the contact production requirements. This is because the traditional one-die two-stamping machine only has a one-time forming composite die, which can easily lead to silver layer misalignment and make it impossible to control the required silver layer level of the contacts. As a result, most contacts do not meet the thickness requirements. In order to meet the required silver layer thickness, the conventional contact production method is to lay more silver layers in the later stage. Moreover, with the increase in material costs, the processing cost of contacts has increased relatively. Therefore, it is particularly important to develop a contact machine that can automatically ensure that the cold-forged contact thickness meets the requirements.

[0003] To address the aforementioned issues, a precision upsetting machine, patent number 202010403688.3, ​​has been disclosed. While it also discloses the functions of one-stroke, two-stroke, and three-stroke operation, its transmission method employs a helical gear to drive the third and second side driven mechanisms to power the upsetting head shearing mechanism. Furthermore, the two third and second driven mechanisms operate via a single shaft and a conjugate cam. Adjacent shafts are connected by gear mechanisms, belt mechanisms, chain mechanisms, etc., resulting in a relatively complex transmission structure. Moreover, since the three upsetting heads are independently set, three die-mounting positions are required. The upsetting is performed by using a main slider that moves along the upsetting trajectory. Therefore, this method is relatively complex and has poor stability, thus requiring improvement. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a three-stroke cold heading contact machine to solve the defects of existing cold heading contact machines, such as complex structure and poor stability. (II) Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a three-punch cold heading contact machine, comprising a frame, on which are mounted a cross punch holder, a positioning mold for placing products during processing, a transmission mechanism, a conveying mechanism, and two symmetrical shearing mechanisms. The cross punch holder is equipped with three punches to perform one, two, and three punches on the product on the positioning mold. The transmission mechanism comprises the following components:

[0008] The main transmission mechanism includes a drive motor, a crankshaft, and a crankshaft pulley fixed on the frame. The drive motor is connected to the crankshaft pulley, and the crankshaft pulley is fixed to one side of the crankshaft. A pinion is fixed to the other side of the crankshaft.

[0009] The driven transmission mechanism includes a transmission shaft, a sliding plate, a head lifting linkage assembly, a lifting rocker arm assembly, and a central punch seat. One side of the central punch seat is fixedly connected to a cross punch frame, and the other side of the central punch seat is fixed to the head assembly. One side of the transmission shaft is provided with a large gear that meshes with a small gear. The sliding plate is fixed to the inner side of the large gear. The sliding plate is provided with a groove that mates with one end of the head lifting linkage assembly. The other end of the head lifting linkage assembly is hinged to a lifting rocker arm assembly. The central punch seat is hinged to the lifting rocker arm assembly. The groove is provided with limiting points that can limit the three punches separately. The main transmission mechanism is connected to the transmission shaft with a transmission ratio of 1:3. A drive wheel is provided on the other side of the transmission shaft. A shearing linkage assembly that mates with a corresponding shearing mechanism is fixed to the outer side of both the drive wheel and the large gear.

[0010] Preferably, for ease of lifting, the lifting rocker arm assembly includes a rocker arm shaft, a lifting rocker arm, and a rocker arm support shaft. The lifting rocker arm is fixed to one side of the rocker arm shaft, and a rocker arm support shaft is fixed above the lifting rocker arm. A swing arm is fixed on the rocker arm shaft, and a double-headed seat is hinged to the swing arm. The other end of the double-headed seat is connected to one end of the center punch seat.

[0011] As a preferred and convenient method for raising and lowering the pier head, the pier head raising linkage assembly includes a raising linkage, a raising slider, a spring, and a copper slider. One side of the raising linkage has a raising slider for fixing the rocker arm support shaft, and the other side of the raising linkage has a copper slider sleeved around the drive shaft. A friction ring that mates with the inner wall of the slide groove is provided on the side of the copper slider. The raising linkage also has two spaced spring spacers, with a spring fixed inside each spacer. A double-ended bolt is sleeved on each of the two spring spacers, and both ends of the double-ended bolt pass through the corresponding spring spacers and are locked by lock nuts. One end of the double-ended bolt mates with the raising slider.

[0012] Preferably, for ease of positioning, a protruding roller pin is provided on the lifting link, and the roller pin is inserted into the slide groove.

[0013] Preferably, to ensure a simpler structure, the punch assembly includes a punch body, a piston and a piston rod that cooperate with the piston are provided in the punch body, a linkage rod is hinged to the side of the piston, the middle punch seat is fixed to the other side of the punch body, the cross punch frame is fixed to the front end of the middle punch seat, and a connecting rod bearing is provided in the other end of the linkage rod, the connecting rod bearing is sleeved on the crankshaft.

[0014] As a preferred option, to ensure greater accuracy during the second stroke and ultimately guarantee positioning precision, a second-stroke limiting component is provided on the frame to limit the movement of the second-stroke head. The second-stroke limiting component includes a second-stroke limiting block fixed on the middle punch seat, a fixed seat, a gantry frame, and a roller. The gantry frame is fixed on the fixed seat, and the fixed seat is fixed on the frame. Two bearing seats are provided on the gantry frame, and bearings are fixed inside the two bearing seats. The two bearings are fitted onto the outside of the roller. The roller achieves the limiting when it abuts against the second-stroke limiting block.

[0015] Preferably, in order to achieve synchronous feeding, the conveying mechanism includes a feeding rack straightening wheel component, two sets of wire feeding wheel components, and a feeding component that drives the two sets of wire feeding wheel components to work, wherein the feeding rack straightening wheel component synchronously conveys the silver layer and the metal substrate.

[0016] Preferably, the two wire feeding wheel components are driven synchronously. A fixed base for fixing the positioning mold is fixed on the frame. The two sets of wire feeding wheel components are located on the front and rear sides of the fixed base, respectively, and are used to feed the silver layer and the metal substrate to the corresponding shearing mechanism. The feeding component includes a support plate, a cam spindle, an ejector rocker arm seat, and an ejector rocker arm that cooperates with the positioning mold to eject the product. The support plate is fixed on the fixed base. The cam spindle is provided with two bearings distributed on the left and right. The two bearings are fixed to the bottom of the support plate by two bearing seats on the left and right sides, respectively. A finished product ejection cam is fixed at the center of the shaft. The ejection rocker arm seat is fixed above the support plate. One end of the ejection rocker arm is hinged to the ejection rocker arm. The ejection rocker arm passes through the support plate and is rotatably connected to a movable wheel that abuts against the finished product ejection cam. An eccentric wheel is fixed on both sides of the cam main shaft. A driven pulley is fixed on one of the eccentric wheels. A driven wheel is fixed on the side of the drive wheel. The driven wheel is connected to the driven pulley through a belt. An adjusting shaft is fixed on the outside of the eccentric wheel. The adjusting shaft is connected to the corresponding wire feeding wheel component and drives the wire feeding wheel component to rotate to achieve feeding.

[0017] Preferably, in order to achieve synchronous cutting by the drive shaft and avoid the impact on subsequent processing due to the cutting not being carried out at the same time, the shearing linkage assembly includes a first double-ended screw, a first connector and a second connector. One end of the first double-ended screw is threadedly connected to the first connector, and the other end of the first double-ended screw is threadedly connected to the second connector. The first connector is rotatably connected to the shearing mechanism, and the second connector is connected to the positioning shaft on the side of the drive wheel.

[0018] (III) Beneficial Effects

[0019] The advantages of the single-die three-punch cold heading contact machine provided by the present invention are: the structure is simple, and only one transmission method is used to synchronously drive other components to achieve the work, thereby reducing equipment costs. Moreover, the overall transmission components are few, and the operation is relatively more stable. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the overall structure of the three-stroke cold heading contact machine in Example 1;

[0021] Figure 2 This is a front view of the three-stroke cold heading contact machine in Example 1;

[0022] Figure 3 This is a left-side view of the three-stroke cold heading contact machine in Example 1;

[0023] Figure 4 This is a top view of the three-stroke cold heading contact machine in Example 1;

[0024] Figure 5 for Figure 3 A cross-sectional view of AA in the diagram;

[0025] Figure 6 A three-dimensional view of the connection structure of the transmission mechanism;

[0026] Figure 7 for Figure 6 The front view;

[0027] Figure 8 This is a front view of the pier head lifting linkage assembly;

[0028] Figure 9 for Figure 8 A three-dimensional image;

[0029] Figure 10 A 3D view of the lifting rocker arm assembly;

[0030] Figure 11 for Figure 10 A cross-sectional schematic diagram;

[0031] Figure 12 This is a front view of the pier head assembly;

[0032] Figure 13 for Figure 12 A schematic diagram of the cross-section of BB;

[0033] Figure 14 A three-dimensional view of the connection structure of the drive shaft, the lifting linkage assembly of the pier head, the pier head assembly, and the center punch seat;

[0034] Figure 15 A front view of the connection structure of the drive shaft, the lifting linkage assembly of the pier head, the pier head assembly, and the center punch seat;

[0035] Figure 16 A top view of the connection structure of the drive shaft, the lifting linkage assembly of the pier head, the pier head assembly, and the center punch seat;

[0036] Figure 17 This is a schematic diagram of the front structure of the chute.

[0037] Figure 18 This is a schematic diagram of the front structure of the two-stroke limiting component;

[0038] Figure 19 for Figure 18 CC cross-section;

[0039] Figure 20 This is a side view of the feeding component;

[0040] Figure 21 This is a front view of the feeding component;

[0041] Figure 22 This is a 3D view of the feeding component;

[0042] Figure 23 This is a three-dimensional view of the shear link assembly;

[0043] Figure 24 This is a perspective view of the wire feed roller assembly;

[0044] Figure 25 This is a three-dimensional view of the shearing mechanism.

[0045] The reference numerals in the diagram are as follows: Frame 1, Fixed base 1-1, Cross punch frame 2, Conveying mechanism 3, Feeding rack straightening wheel assembly 31, Wire feeding wheel assembly 32, Feeding assembly 33, Support plate 331, Cam spindle 332, Ejection rocker arm seat 333, Ejection rocker arm 334, Bearing II 335, Bearing seat II 336, Finished product ejection cam 337, Movable wheel 338, Eccentric wheel 339, Driven pulley 340, Driven wheel 341, Adjusting shaft 342, Shearing mechanism 4, Main transmission mechanism 5, Transmission motor 51, Crankshaft 52, Crankshaft pulley 53, Pinion 54, Driven transmission mechanism 6, Transmission shaft 61, Slide plate 62, Head lifting linkage assembly 63, Lifting linkage 631, Locking nut 632, Lifting slider 633, Spring 634, Copper 635 slider, 636 friction ring, 637 spring spacer, 638 double-ended bolt, 64 lifting rocker arm assembly, 641 rocker arm shaft, 642 lifting rocker arm, 644 double-ended seat, 643 rocker arm support shaft, 645 swing arm, 65 central punch seat, 66 punch assembly, 661 punch body, 662 piston, 663 connecting rod bearing, 664 piston rod, 665 linkage rod, 7 large gear, 8 slide groove, 8-1 limit point, 9 drive wheel, 9-1 positioning shaft, 10 shearing connecting rod assembly, 101 first double-ended screw, 102 first connector, 103 second connector, 11 roller pin, 13 second punch limit assembly, 131 second punch limit block, 132 fixed seat, 133 gantry frame, 134 roller, 135 bearing seat 1, 136 bearing 1, 14 positioning mold. Detailed Implementation

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Example 1:

[0048] Please see Figure 1-25 An embodiment of the present invention provides a three-punch cold heading contact machine, comprising a frame 1, on which are mounted a cross punch holder 2, a positioning mold 14 for placing products during processing, a transmission mechanism, a conveying mechanism 3, and two symmetrical shearing mechanisms 4. The cross punch holder 2 is provided with three punches spaced vertically apart, enabling the first, second, and third punches to be applied to the products on the positioning mold 14. The transmission mechanism comprises the following components:

[0049] The main transmission mechanism 5 includes a transmission motor 51, a crankshaft 52, and a crankshaft pulley 53 fixed on the frame 1. The transmission motor 51 is connected to the crankshaft pulley 53, and the crankshaft pulley 53 is fixed to one side of the crankshaft 52. A pinion 54 is fixed to the other side of the crankshaft 52. A motor drive wheel 55 is provided on the output shaft of the transmission motor 51, and the motor drive wheel 55 is connected to the crankshaft pulley 53 via a belt drive.

[0050] Driven transmission mechanism 6 includes a drive shaft 61, a sliding plate 62, a head lifting linkage assembly 63, a lifting rocker arm assembly 64, and a central punch seat 65. One side of the central punch seat 65 is fixedly connected to the cross punch frame 2, and the other side of the central punch seat 65 is fixed to the head assembly 66. A large gear 7 meshing with a small gear 54 is provided on one side of the drive shaft 61. The sliding plate 62 is fixed to the inner side of the large gear 7, and a groove 8 is provided on the sliding plate 62 that mates with one end of the head lifting linkage assembly 63. The slide 8 is provided with limiting points 8-1 that can limit the three punches respectively, so that the three punches can be positioned as the slide plate 62 rotates. The other end of the lifting linkage assembly 63 is hinged to the lifting rocker arm assembly 64. The middle punch seat 65 is hinged to the lifting rocker arm assembly 64. The main transmission mechanism 5 is connected to the transmission shaft 61 with a transmission ratio of 1:3. A drive wheel 9 is provided on the other side of the transmission shaft 61. A shearing linkage assembly 10 that cooperates with the corresponding shearing mechanism 4 is fixed on the outer side of both the drive wheel 9 and the large gear 7.

[0051] During operation, the drive motor 51 drives the crankshaft pulley 53 to rotate, which in turn drives the crankshaft 52 to rotate. The crankshaft 52's rotation drives the pinion 54 to rotate, which in turn drives the large gear 7 to rotate. Simultaneously, the rotation of the large gear 7 drives the shearing linkage assemblies 10 on both sides to swing. The shearing linkage assemblies 10 drive the corresponding shearing mechanism 4 to shear and extend, feeding the material into the positioning mold 14. At the same time, the rotation of the large gear 7 drives the drive shaft 61 to rotate, which in turn drives the lifting linkage assembly 63 to rise and fall. The simultaneous rise and fall of the lifting linkage assembly 63 drives the lifting rocker arm assembly 64 to swing, thus periodically positioning the three punches on the upper punch holder 65. Simultaneously, the middle punch holder 65, as the crankshaft 52 rotates, drives the punch assembly 66 to work. Therefore, this structure adopts... A crankshaft 52, in conjunction with a small gear 54, drives a transmission shaft connected to a large gear 7 to rotate. Simultaneously, a sliding plate 62 is positioned on the side of the large gear 7. Three limiting points are pre-set on the sliding plate 62 to drive the lifting linkage assembly 63 and the lifting rocker arm assembly 64, enabling the switching process of the three punches. Furthermore, a common shearing linkage assembly 10 directly drives the shearing mechanism 4 on both sides of the transmission shaft, simplifying the entire structure. The use of the sliding plate 62 to achieve three-point limiting further ensures more stable adjustment. Therefore, this structure is simple, uses only one transmission method to synchronously drive other components, reducing equipment costs, has fewer transmission parts, and operates more stably.

[0052] Preferably, for ease of lifting, the lifting rocker arm assembly 64 includes a rocker arm shaft 641, a lifting rocker arm 642, and a rocker arm support shaft 643. The lifting rocker arm 642 is fixed to one side of the rocker arm shaft 641, and the rocker arm support shaft 643 is fixed above the lifting rocker arm 642. A swing arm 645 is fixed to the rocker arm shaft 641, and a double-headed seat 644 is hinged to the swing arm 645. The other end of the double-headed seat 644 is connected to one end of the punch head seat 65. For ease of fixing, a rocker arm cover 647 is fixed to both sides of the rocker arm shaft 641. The outer side is fixed by the end cap 646. The working principle of the lifting rocker arm assembly 64 is that the rocker arm support shaft 643 is fixed on the lifting slider 633. As the lifting slider 633 swings, and the rocker arm support shaft 643 swings, it drives the rocker arm shaft 641 to rotate, thereby driving the rocker arm 645 to swing. The swing of the rocker arm 645 drives the upper double-head seat 644 to move up and down. The up and down movement of the double-head seat 644 drives the middle punch seat 65 to move up and down to switch the three punches. That is, the upper, middle and lower positions of the rocker arm 645 correspond to the three punches. The first punch is in the lowest position, the middle punch is in the middle position, and the third punch is in the uppermost position.

[0053] As a preferred and convenient method for raising and lowering the pier head, the pier head raising linkage assembly 63 includes a raising linkage 631, a raising slider 633, a spring 634, and a copper slider 635. One side of the raising linkage 631 is provided with a raising slider 633 for fixing the rocker arm support shaft 643, and the other side of the raising linkage 631 is provided with a copper slider 635 sleeved on the drive shaft 61. A friction ring 636 that mates with the inner wall of the slide groove 8 is provided on the side of the copper slider 635. Two additional... Spring spacers 637 are spaced apart, and a spring 634 is fixed inside each of the two spacers 637. A double-ended bolt 638 is fitted onto each of the two spacers 637. The two double-ended bolts 638 pass through the corresponding spacers 637 on both sides and are locked by locking nuts 632. One end of the double-ended bolt 638 engages with the lifting slider 633. A protruding roller pin 11 is provided on the lifting connecting rod 631. The roller pin 11 is inserted into the slide groove 8. The lifting connecting rod of the pier head... The working principle of component 63 is as follows: As the copper slider 635 rotates with the drive shaft 61, it drives the roller pin 11 to move in the slide groove 8. The slide groove 8 is set with 3 positioning points, which are used to position the first punch, the second punch and the third punch respectively. When the first punch is performed, the roller pin 11 rotates with the drive shaft 61 and moves to the first positioning point of the slide groove 8. At this time, the first punch of the cross punch frame 2 above is transported by the two shearing mechanisms 4 and placed on the positioning mold table. The first punch drives the silver layer and the metal base material into the positioning mold 14 and aligns and extrudes them, welding the silver layer and the metal base material together. Similarly, when the second punch is performed, the roller pin 11 rotates with the drive shaft 61 and moves to the second positioning point of the slide groove 8, that is, the middle position of the slide groove 8 of the slide plate. At this time, the second punch of the cross punch frame 2 above is driven to perform forming punch on the product. When the third punch is performed, the roller pin 11 rotates with the drive shaft 61 and moves to the third positioning point of the slide groove 8. At this time, the third punch of the cross punch frame 2 above is driven to perform three positioning operations on the product.

[0054] Preferably, to ensure a simpler structure, the punch assembly 66 includes a punch body 661, within which a piston 662 and a piston rod 664 cooperating with the piston 662 are disposed. A linkage rod 665 is hinged to the side of the piston 662. The middle punch seat 65 is fixed to the other side of the punch body 661, and the cross punch frame 2 is fixed to the front end of the middle punch seat 65. A connecting rod bearing 663 is disposed at the other end of the linkage rod 665, and the connecting rod bearing 663 is sleeved on the crankshaft 52. The working principle of the punch assembly 66 is as follows: the crankshaft 52 rotates, causing the linkage rod 665 to swing, which in turn drives the piston to work and drives the piston rod 664 to move up and down, which in turn drives the punch body 661 to move up and down, ultimately causing the middle punch seat 65 in front to work and swing up and down, thereby causing the cross punch frame 2 in front to work synchronously.

[0055] As a preferred option, to ensure greater accuracy during the second stroke and ultimately guarantee positioning precision, a second-stroke limiting assembly 13 is provided on the frame 1 to limit the movement of the second-stroke head. The second-stroke limiting assembly 13 includes a second-stroke limiting block 131, a fixed base 132, a gantry frame 133, and rollers 134. The gantry frame 133 is fixed to the fixed base 132, which is fixed to the frame 1. Two bearing seats 135 are provided on the gantry frame 133, and bearings 136 are fixed within the two bearing seats 135. Outside the roller 134, the roller 134 abuts against the second punch limiting block 131 to achieve a limiting position. When the second punch comes up, since the second punch limiting block 131 is fixed behind the middle punch head seat 65 and the second punch limiting assembly 13 is fixed behind the frame, it is achieved that as the punch comes up, when the second punch limiting block 131 touches the extended roller 134, it means that the middle punch has reached the position and the middle punch, i.e. the second punch, can be performed. This ensures effective positioning of the product during the second punch, avoids positional deviation during the second punch, and ensures stable punching to the product surface, which would prevent the product from being unable to slide and thus damaging the product.

[0056] Preferably, in order to achieve synchronous feeding, the conveying mechanism 3 includes a feeding rack straightening wheel component 31, two sets of wire feeding wheel components 32, and a feeding component 33 that drives the two sets of wire feeding wheel components 32 to work, wherein the feeding rack straightening wheel component 31 synchronously conveys the silver layer and the metal substrate.

[0057] Preferably, the two wire feeding wheel components 32 are driven synchronously. A fixed base 1-1 for fixing the positioning mold is fixed on the frame 1. The two sets of wire feeding wheel components 32 are located on the front and rear sides of the fixed base 1-1, respectively, and are used to convey the silver layer and the metal substrate to the corresponding shearing mechanism 4. The feeding component 33 includes a support plate 331, a cam spindle 332, an ejection rocker arm seat 333, and an ejection rocker arm 334 that cooperates with the positioning mold 14 to eject the product. The support plate 331 is fixed on the fixed base 1-1. The cam spindle 332 is provided with two left and right distributed bearings 335. The two bearings 335 are connected by two shafts on the left and right sides respectively. The second support 336 is fixed to the bottom of the support plate 331. A finished product ejection cam 337 is fixed at the center of the cam spindle 332. The ejection rocker arm seat 333 is fixed above the support plate 331. One end of the ejection rocker arm 334 is hinged to the ejection rocker arm 334. The ejection rocker arm 334 passes through the support plate 331 and is rotatably connected to a movable wheel 338 that abuts against the finished product ejection cam 337. An eccentric wheel 339 is fixed on both sides of the cam spindle 332. A driven pulley 340 is fixed on one of the eccentric wheels 339. A driven wheel 341 is fixed on the side of the drive wheel 9. The driven wheel 341 is connected to the driven pulley 330 via a belt. A zero-connection is established. An adjusting shaft 342 is fixed to the outside of the eccentric wheel 339. The adjusting shaft 342 is connected to the corresponding wire feeding wheel component 32, driving the wire feeding wheel component 32 to rotate and achieve feeding. A double-headed seat 321 is hinged to the corresponding wire feeding wheel component 32. One end of the adjusting shaft 342 is hinged to the corresponding double-headed seat 321. The specific structure of the wire feeding wheel component 32 is existing technology and will not be described in detail. During operation, the driven pulley 340 is connected to the driven wheel 341 via a belt. The rotation of the transmission shaft 61 drives the driven wheel 341 to rotate, ultimately driving the driven pulley 340. The rotation of the driven pulley 340 drives the cam main shaft 332 to rotate, and through the finished product ejector... Wheel 337 pushes against movable wheel 338, and finally adjusts the ejector rocker arm 334 to eject the product from the positioning mold 14. At the same time, the cam spindle 332 rotates, driving the eccentric wheels 339 on both sides to rotate. The adjusting shaft 342 drives the wire feeding wheel component 32 to rotate, so as to transport the corresponding silver layer and metal substrate to the corresponding position on the side of the positioning mold 14. Then, the shearing mechanism 4 cuts and transports the product into the positioning mold 14. At the same time, an ejector pin is provided on the side of the ejector rocker arm 334. The ejector pin is inserted into the positioning mold 14. As the ejector rocker arm 334 swings back and forth, the ejector pin also swings back and forth, just enough to eject the contact point processed in the positioning mold 14 from the positioning mold 14, realizing the discharge.

[0058] Preferably, to achieve synchronous shearing via the drive shaft and avoid affecting subsequent processing due to inconsistent shearing, the shearing linkage assembly 10 includes a first double-ended screw 101, a first connector 102, and a second connector 103. One end of the first double-ended screw 101 is threadedly connected to the first connector 102, and the other end is threadedly connected to the second connector 103. The first connector 102 is rotatably connected to the shearing mechanism 4, and the second connector 103 is connected to the positioning shaft 9-1 on the side of the drive wheel 9. The specific structure of the shearing mechanism 4 is prior art and will not be described in detail here. The shearing mechanism 4 is provided with a connection to the first connector 102. The hinged cam slide plate 41 drives the shearing linkage assembly 10 when the drive shaft rotates, ultimately pulling the cam slide plate 41 up and down. This allows the cam slide plate 41 to push the shear head of the shearing mechanism 4 horizontally, i.e., push it out. Finally, after shearing, the product (here, the product is the silver layer and the metal base material, because there are two symmetrically arranged shearing mechanisms 4) is pushed into the positioning mold 14. The specific conveying method is conventional technology in this field and will not be described in detail. During operation, when the second connector 103 rotates with the drive wheel 9, the shearing linkage assembly 10 can swing up and down, ultimately driving the shearing mechanism 4 to move horizontally back and forth, achieving shearing and extension to convey the product.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-punch cold heading contact machine, comprising a frame (1), a cross punch frame (2), a positioning mold (14) for placing products during processing, a transmission mechanism, a conveying mechanism (3), and two symmetrical shearing mechanisms (4), wherein the cross punch frame (2) is provided with three punches, characterized in that: The transmission mechanism includes: a main transmission mechanism (5), which includes a transmission motor (51), a crankshaft (52) and a crankshaft pulley (53). The transmission motor (51) is connected to the crankshaft pulley (53) in a transmission manner, and the crankshaft pulley (53) is fixed on one side of the crankshaft (52). A pinion (54) is fixed on the other side of the crankshaft (52).The driven transmission mechanism (6) includes a transmission shaft (61), a sliding plate (62), a head lifting linkage assembly (63), a lifting rocker arm assembly (64), and a central punch seat (65). One side of the central punch seat (65) is connected to the cross punch frame (2), and the other side of the central punch seat (65) is fixed with the head assembly (66). One side of the transmission shaft (61) is provided with a large gear (7) that meshes with the small gear (54). The sliding plate (62) is fixed to the inner side of the large gear (7). One end of the head lifting linkage assembly (63) is engaged with the sliding plate (62) and can perform three-point positioning as the sliding plate (62) rotates. The other end of the head lifting linkage assembly (63) is hinged. The lifting rocker arm assembly (64) is connected to the central punch seat (65), which is hinged to the lifting rocker arm assembly (64). The main transmission mechanism (5) is connected to the transmission shaft (61) with a transmission ratio of 1:

3. The conveying mechanism (3) includes a feeding rack straightening wheel assembly (31), two sets of wire feeding wheel assemblies (32), and a feeding component (33) that drives the two sets of wire feeding wheel assemblies (32). A fixed base (1-1) for fixing and positioning mold (14) is fixed on the frame (1). The two sets of wire feeding wheel assemblies (32) are respectively located on the shearing mechanism (4) on the front and rear sides of the fixed base (1-1). The feeding component (33) includes a support plate (331) and a cam spindle (332). The ejector rocker arm seat (333) and the ejector rocker arm (334) that cooperates with the positioning mold (14) for ejecting the product are provided. The support plate (331) is fixed on the fixed base (1-1). The cam spindle (332) is provided with two left and right distributed bearings (335). The two bearings (335) are fixed to the bottom of the support plate (331) by two left and right bearing seats (336). A finished product ejector cam (337) is fixed at the center of the cam spindle (332). The ejector rocker arm seat (333) is fixed above the support plate (331). One end of the ejector rocker arm (334) is hinged to the ejector rocker arm seat (333). 34) A movable wheel (338) is rotatably connected to the support plate (331) and abuts against the finished product ejection cam (337). An eccentric wheel (339) is fixed on both sides of the cam main shaft (332). A driven pulley (340) is fixed on one of the eccentric wheels (339). A drive wheel (9) is provided on the other side of the transmission shaft (61). A driven wheel (341) is fixed on the side of the drive wheel (9). The driven wheel (341) is connected to the driven pulley (340) by a belt. An adjusting shaft (342) is fixed on the outside of the eccentric wheel (339). The adjusting shaft (342) is connected to the corresponding wire feeding wheel component (32).

2. The three-stroke cold heading contact machine according to claim 1, characterized in that: The lifting rocker arm assembly (64) includes a rocker arm shaft (641), a lifting rocker arm (642), and a rocker arm support shaft (643). The lifting rocker arm (642) is fixed on one side of the rocker arm shaft (641), and a rocker arm support shaft (643) is fixed above the lifting rocker arm (642). A swing arm (645) is fixed on the rocker arm shaft (641), and a double-headed seat (644) is hinged on the swing arm (645). The other end of the double-headed seat (644) is connected to one end of the punch head seat (65).

3. The three-stroke cold heading contact machine according to claim 2, characterized in that: The aforementioned lifting linkage assembly (63) includes a lifting linkage (631), a lifting slider (633), a spring (634), and a copper slider (635). A lifting slider (633) for fixing the rocker arm support shaft (643) is provided on one side of the lifting linkage (631), and a copper slider (635) sleeved on the other side of the lifting linkage (631) is provided. A friction ring (636) that mates with the inner wall of the slide groove (8) is provided on the side of the copper slider (635). Two additional... A spring spacer (637) is spaced apart, and a spring (634) is fixed inside the two spring spacers (637). A double-ended bolt (638) is fitted onto the two spring spacers (637). The two double-ended bolts (638) pass through the corresponding spring spacers (637) on both sides and are locked by locking nuts (632). One end of the double-ended bolt (638) is engaged with the lifting slider (633). A protruding roller pin (11) is provided on the lifting connecting rod (631). The roller pin (11) is inserted into the slide groove (8).

4. The single-die three-punch cold heading contact machine according to claim 1, 2, or 3, characterized in that: The punch assembly (66) includes a punch body (661), a piston (662) and a piston rod (664) cooperating with the piston (662) are provided inside the punch body (661), a linkage rod (665) is hinged to the side of the piston (662), the middle punch seat (65) is fixed to the other side of the punch body (661), the cross punch frame (2) is fixed to the front end of the middle punch seat (65), and a connecting rod bearing (663) is provided inside the other end of the linkage rod (665), and the connecting rod bearing (663) is sleeved on the crankshaft (52).

5. The single-die three-punch cold heading contact machine according to claim 4, characterized in that: A two-punch limiting assembly (13) capable of limiting the two-punch head is provided on the frame (1). The two-punch limiting assembly (13) includes a two-punch limiting block (131) fixed on the middle punch seat (65), a fixed seat (132), a gantry (133) and a roller (134). The gantry (133) is fixed on the fixed seat (132), and the fixed seat (132) is fixed on the frame (1). Two bearing seats (135) are provided on the gantry (133). Bearings (136) are fixed inside the two bearing seats (135). The two bearings (136) are sleeved on the outside of the roller (134). The roller (134) is limited when it abuts against the two-punch limiting block (131).

6. The single-die three-punch cold heading contact machine according to claim 5, characterized in that: Both the drive wheel (9) and the large gear (7) are fixed with a shearing linkage assembly (10) that cooperates with the corresponding shearing mechanism (4). The shearing linkage assembly (10) includes a first double-ended screw (101), a first connector (102), and a second connector (103). One end of the first double-ended screw (101) is threaded to the first connector (102), and the other end of the first double-ended screw (101) is threaded to the second connector (103). The first connector (102) is rotatably connected to the shearing mechanism (4), and the second connector (103) is connected to the positioning shaft (9-1) on the side of the drive wheel (9).

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