A pressure sensitive resistor pin continuous welding apparatus

Abstract

The application belongs to the technical field of pressure-sensitive resistance welding, and discloses a pressure-sensitive resistance pin continuous welding device, which comprises a workbench, clamping plates symmetrically clamped at the left and right ends of the workbench, the clamping plates being displaced left and right relative to the workbench, linkage plates fixedly installed at the top ends of the clamping plates, positioning blocks installed at the middle portions of the bottom ends of the clamping plates, and a power assembly installed at the bottom end of the workbench. The two positioning blocks are moved towards each other, thereby driving the clamping plates and the linkage plates to synchronously approach, clamping the circuit board is realized, in the process of the linkage plates approaching each other, the horizontal movement of the linkage plates is converted into the vertical movement of the pressing adjusting assembly, which makes the pressing block capable of being pressed down at the same time as the clamping plates clamp the circuit board, and accurately pressed on the pressure-sensitive resistance, the two originally independent steps are combined into one, driven by a power source, the device structure is greatly simplified, and the preparation time before welding is shortened.

Description

Technical Field

[0001] This invention belongs to the field of varistor welding technology, specifically a continuous welding device for varistor leads. Background Technology

[0002] Varistors are important electronic components widely used for overvoltage protection in circuits. Lead soldering is a critical step in their manufacturing process. Currently, lead soldering of varistors is mostly completed using automated or semi-automated equipment to improve production efficiency and soldering quality. In traditional soldering processes, the circuit board containing the varistor is typically fixed to a workbench first, and then pressed down by an independent clamping device (such as a cylinder or servo mechanism) to secure the varistor and prevent displacement due to heat or vibration during soldering.

[0003] However, existing technical solutions generally suffer from the following technical problems: First, the clamping and fixing of the circuit board and the pressing and positioning of the varistor are two separate steps, completed by two independent actuators. This design not only increases the complexity and cost of the equipment but also prolongs the preparation time before soldering. Operators need to first activate the clamping mechanism to fix the circuit board and then activate the pressing mechanism to fix the component, which is cumbersome and affects the overall production cycle and automation efficiency.

[0004] Secondly, traditional positioning methods are insufficient to guarantee the stability of soldering quality. During the step-by-step operation, improper timing or pressure control when pressing the varistor, or slight disturbances in the circuit board before the pressing mechanism actuates, can cause the varistor to deviate from the preset pad. This is especially true on high-density wiring circuit boards, where even minor displacements can lead to soldering defects such as cold solder joints, solder bridges, or solder misalignment, thus reducing the first-pass yield. Furthermore, the supply of solder bars and the precise positioning of the soldering machine (soldering tip) often require independent adjustments or manual assistance, making it difficult to achieve efficient coordination with component pressing and fixing, further limiting the improvement of soldering efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous welding device for varistors to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a continuous welding device for varistor pins, comprising a worktable, wherein clamping plates are symmetrically engaged at the left and right ends of the worktable, the clamping plates are displaced left and right relative to the worktable, a linkage plate is fixedly installed at the top of each clamping plate, a positioning block is installed at the middle of the bottom end of each clamping plate, a power component is installed at the bottom end of the worktable, the outer side of the power component is threadedly connected to the two positioning blocks, a pressing adjustment component is provided between the two linkage plates, linkage components are installed at the four corners of the pressing adjustment component, the other end of the linkage component is connected to the linkage plate, a pressure block is installed at the bottom end of the pressing adjustment component, and a sliding groove is opened at both the left and right ends of the pressure block, and a solder bar auxiliary component and a welding component are respectively movably engaged inside the two sliding grooves; The power component is used to adjust the distance between the two clamping plates and the two linkage plates, and to link the linkage component to adjust the height of the pressing adjustment component. The pressing adjustment component is used to adjust the planar position of the pressure block to assist in welding and the discharge of welding rods.

[0007] As a further technical solution of the present invention, the power component includes a main motor, the outer side of the main motor is connected to the bottom end of the worktable, a bidirectional ball screw is installed at the output end of the main motor, a limit sleeve is fixedly sleeved in the middle of the bidirectional ball screw, and the outer side of the limit sleeve is movably sleeved with the bottom end of the worktable.

[0008] As a further technical solution of the present invention, both positioning blocks are provided with threaded grooves inside, and the thread direction inside the left and right positioning blocks is the same as the thread direction on the outer side of the bidirectional ball screw.

[0009] As a further technical solution of the present invention, the linkage component includes a second fixed seat, which is installed on the outer side of the pressing and adjusting component near the four corners. The end of the second fixed seat away from the pressing and adjusting component is movably connected to a connecting rod via a rotating shaft. The end of the connecting rod away from the second fixed seat is movably connected to a first fixed seat via a rotating shaft. The other end of the first fixed seat is connected to the inner side of the linkage plate.

[0010] As a further technical solution of the present invention, the pressing adjustment component includes a pressure frame, the outer side of the pressure frame is connected to the second fixed seat, both the front and rear ends of the pressure frame are provided with transverse slots, the inside of the pressure frame is provided with an adjustment rod, the adjustment rod is movably engaged with the pressure frame through the transverse slots, and the adjustment rod moves left and right relative to the pressure frame.

[0011] As a further technical solution of the present invention, longitudinal slots are provided at both the left and right ends of the adjusting rod, and a longitudinal adjusting block is provided on the outer side of the adjusting rod. The longitudinal adjusting block is movably engaged with the adjusting rod through the longitudinal slots. The longitudinal adjusting block moves back and forth relative to the adjusting rod, and the bottom end of the longitudinal adjusting block is connected to the pressure block.

[0012] As a further technical solution of the present invention, the solder bar auxiliary component includes a first snap-fit ​​bracket, which is movably snapped into the slide groove. A solder bar winding roller is movably installed at one end of the first snap-fit ​​bracket away from the pressure block. A positioning hole is provided on one side of the first snap-fit ​​bracket. The solder bar winding roller is used to wind the solder bar and the free end of the solder bar passes through the positioning hole.

[0013] As a further technical solution of the present invention, the welding assembly includes a second snap-fit ​​bracket, which is movably snap-fitted with the slide groove. A movable sleeve is fixedly installed at the bottom end of the second snap-fit ​​bracket, and a movable ball is movably snap-fitted at the bottom end of the movable sleeve. The movable ball rotates relative to the movable sleeve.

[0014] As a further technical solution of the present invention, an adjusting sleeve is installed at the bottom of the movable ball, and a welding machine is movably connected inside the adjusting sleeve, and the welding machine moves back and forth relative to the adjusting sleeve.

[0015] The beneficial effects of this invention are as follows: 1. This invention achieves synchronous automation of circuit board clamping and varistor pressing and positioning by setting up a power component, clamping plate, linkage plate, positioning block, linkage component, and pressing and adjusting component. It solves the problems of circuit board fixing and component pressing separation, cumbersome operation, and complex process in the background technology. During operation, the main motor in the power component starts and drives the bidirectional ball screw to rotate, causing the two positioning blocks to move towards each other, thereby driving the clamping plate and linkage plate to move closer synchronously to clamp the circuit board. During the process of the linkage plates moving closer, the horizontal movement of the linkage plate is converted into the vertical movement of the pressing and adjusting component. This allows the pressure block to press down simultaneously with the action of the clamping plate clamping the circuit board and accurately press it onto the varistor. This invention combines two originally independent steps into one, driven by a single power source, which greatly simplifies the equipment structure and shortens the preparation time before welding.

[0016] 2. This invention improves welding quality by ensuring the absolute stability of the varistor during the welding process, solving the problem in the prior art where displacement of the varistor and welding defects are easily caused by step-by-step operation or insecure positioning. In traditional equipment, clamping is performed first, followed by pressing. There is a time difference between the two actions, and they may be performed by different mechanisms, which can easily cause disturbances during the connection process, or uneven pressure from the pressing mechanism, leading to inaccurate component positioning. In this invention, the clamping force on the circuit board and the downward pressure on the varistor come from the same power component. The two are applied and completed simultaneously. At the moment the circuit board is clamped, the varistor is also firmly fixed above the solder pad by the pressure block, eliminating the possibility of tilting or shifting of the varistor under welding thermal shock or mechanical vibration. This synchronous fixing method of "clamping and pressing at the same time" ensures that the relative position of the varistor pin and the circuit board solder pad remains highly accurate throughout the welding process, providing a stable foundation for subsequent solder bar supply and welding machine welding, effectively avoiding defects such as cold solder joints and misaligned solder joints, and significantly improving the first-pass yield and reliability of welding.

[0017] 3. This invention integrates solder bar auxiliary components and welding components on the pressure block, and sets a precise planar position adjustment mechanism on the pressing adjustment component, realizing automatic positioning and efficient coordination of the welding station. This solves the problems of low automation and low efficiency in the prior art, where solder bar supply and welding machine positioning rely on manual labor. The pressure block is not only used to press the component, but also serves as a platform for mounting the solder bar auxiliary components and welding components. When the pressure block presses down to position the varistor, the solder bar and welding machine also descend synchronously to the preset welding working height. Before welding, the operator can make precise planar position adjustments to the pressure block through the adjustment rod and longitudinal adjustment block to ensure that the positional relationship between the pressure block, solder bar outlet, and welding machine relative to the varistor is adjusted in one go. During welding, the solder bar winding roller can realize automatic feeding of the solder bar, and the movable ball and adjustment sleeve in the welding component allow the welding machine to make flexible angle and front-back position fine adjustments to adapt to the welding requirements of different pins. This makes the three key processes of varistor fixing, solder feeding, and welding highly coordinated, greatly reducing manual intervention and significantly improving the automation level and continuous operation efficiency of welding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the present invention; Figure 3 This is an exploded view of the positioning block and power component structure of the present invention; Figure 4 This is a schematic diagram illustrating the cooperation between the linkage component and the pressing adjustment component of the present invention; Figure 5This is a separate exploded view of the structure of the press-adjustment component of the present invention; Figure 6 This is an exploded view of the structure of the pressure block, solder bar auxiliary component, and welding component of the present invention; Figure 7 This is a separate exploded view of the welding assembly structure of the present invention.

[0019] In the diagram: 1. Workbench; 2. Clamping plate; 3. Linkage plate; 4. Positioning block; 5. Power assembly; 501. Main motor; 502. Bidirectional ball screw; 503. Limit sleeve; 6. Linkage assembly; 601. First fixed seat; 602. Second fixed seat; 603. Connecting rod; 7. Pressing adjustment assembly; 701. Pressure frame; 702. Transverse slot; 703. Adjusting rod; 704. Longitudinal slot; 705. Longitudinal adjusting block; 8. Pressure block; 9. Slide groove; 10. Solder bar auxiliary assembly; 101. First clamping frame; 102. Solder bar winding roller; 103. Positioning hole; 11. Welding assembly; 111. Second clamping frame; 112. Movable sleeve; 113. Movable ball; 114. Adjusting sleeve; 115. Welding machine. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 7 As shown in the embodiment of the present invention, a continuous welding device for varistor pins includes a workbench 1, with clamping plates 2 symmetrically clamped at the left and right ends of the workbench 1. The clamping plates 2 are displaced left and right relative to the workbench 1. A linkage plate 3 is fixedly installed at the top of each clamping plate 2, and a positioning block 4 is installed in the middle of the bottom end of each clamping plate 2. A power component 5 is installed at the bottom end of the workbench 1. The outer side of the power component 5 is threadedly connected to the two positioning blocks 4. A pressing adjustment component 7 is provided between the two linkage plates 3. A linkage component 6 is installed at each of the four corners of the pressing adjustment component 7. The other end of the linkage component 6 is connected to the linkage plate 3. A pressure block 8 is installed at the bottom end of the pressing adjustment component 7. A sliding groove 9 is opened at both the left and right ends of the pressure block 8. A solder bar auxiliary component 10 and a welding component 11 are movably clamped inside the two sliding grooves 9, respectively. The power component 5 is used to adjust the distance between the two clamping plates 2 and the two linkage plates 3, and to link the linkage component 6 to adjust the height of the pressing adjustment component 7. The pressing adjustment component 7 is used to adjust the planar position of the pressure block 8 to assist in welding and the discharge of welding rods.

[0022] When soldering the pins of a varistor, insert the varistor to be soldered into the circuit board, place the corresponding circuit board above the workbench 1, turn on the power of the device, and adjust the plane position of the pressure block 8 so that it is directly above the varistor, thus completing the preparation before soldering the pins of the varistor.

[0023] like Figure 1 and Figure 2 as well as Figure 3 As shown, the power assembly 5 includes a main motor 501. The outer side of the main motor 501 is connected to the bottom end of the worktable 1. A bidirectional ball screw 502 is installed at the output end of the main motor 501. A limit sleeve 503 is fixedly sleeved in the middle of the bidirectional ball screw 502. The outer side of the limit sleeve 503 is movably sleeved with the bottom end of the worktable 1. Threaded grooves are opened inside the two positioning blocks 4, and the thread direction inside the left and right positioning blocks 4 is the same as the thread direction on the outer side of the bidirectional ball screw 502.

[0024] During welding, the main motor 501 is turned on, which drives the bidirectional ball screw 502 at one end of the main motor 501 to rotate. At this time, the two positioning blocks 4 located on the outer side of the bidirectional ball screw 502 are driven by the clamping plate 2 to move closer or further away from each other. When the two clamping plates 2 move closer to each other, the distance between them and the circuit board decreases until the side of the clamping plate 2 contacts the circuit board. The clamping process of the circuit board is completed by the two clamping plates 2.

[0025] like Figure 1 and Figure 4 as well as Figure 5 As shown, the linkage component 6 includes a second fixed seat 602, which is installed on the outer side of the pressing adjustment component 7 near the four corners. The end of the second fixed seat 602 away from the pressing adjustment component 7 is movably connected to a connecting rod 603 via a pivot. The ends of the connecting rod 603 away from the second fixed seat 602 are movably connected to a first fixed seat 601 via pivots. The other end of the first fixed seat 601 is connected to the inner side of the linkage plate 3. The pressing adjustment component 7 includes a pressure frame 701, the outer side of which is connected to the second fixed seat 602. The front and rear ends of the pressure frame 701... Each end of the pressure frame 701 is provided with a transverse slot 702. An adjusting rod 703 is provided inside the pressure frame 701. The adjusting rod 703 is movably engaged with the pressure frame 701 through the transverse slot 702. The adjusting rod 703 moves left and right relative to the pressure frame 701. Both ends of the adjusting rod 703 are provided with longitudinal slots 704. A longitudinal adjusting block 705 is provided on the outer side of the adjusting rod 703. The longitudinal adjusting block 705 is movably engaged with the adjusting rod 703 through the longitudinal slot 704. The longitudinal adjusting block 705 moves back and forth relative to the adjusting rod 703. The bottom end of the longitudinal adjusting block 705 is connected to the pressure block 8.

[0026] Example: During the initial adjustment, the horizontal position of the pressure block 8 can be adjusted by moving the adjusting rod 703, and the vertical position of the pressure block 8 can be adjusted by moving the vertical adjusting block 705. By adjusting the planar position, the pressure block 8 is positioned directly above the varistor resistor.

[0027] When the two clamping plates 2 come close to each other and clamp the circuit board, the two first fixing seats 601 on the left and right sides also come close to each other, and drive the connecting rod 603 to deflect diagonally downwards, and apply a pushing force to the second fixing seat 602. At this time, the pressing and adjusting component 7 can be pushed to move downwards as a whole, and the pressure block 8 can be moved downwards as a whole until the bottom end of the pressure block 8 contacts the varistor, applying pressure to the varistor and completing the positioning, thus simultaneously completing the limiting and fixing of the circuit board and the limiting and fixing of the varistor.

[0028] By utilizing the clamping process of the circuit board and through the cooperation between the linkage component 6, the linkage plate 3, and the pressing and adjusting component 7, the varistor can be fixed in position while the circuit board is being clamped. This simultaneous operation avoids the need for the traditional device to first clamp the circuit board and then use an external device to fix the varistor. The varistor can be fixed in position at the same time, reducing preparation time, preventing displacement of the varistor during welding, and improving welding efficiency.

[0029] like Figure 5 and Figure 6 As shown, the solder bar auxiliary assembly 10 includes a first snap-fit ​​bracket 101, which is movably snapped into the slide groove 9. A solder bar winding roller 102 is movably installed at the end of the first snap-fit ​​bracket 101 away from the pressure block 8. A positioning hole 103 is provided on one side of the first snap-fit ​​bracket 101. The solder bar winding roller 102 is used to wind the solder bar and the free end of the solder bar passes through the positioning hole 103.

[0030] Example: After the varistor is fixed in place, the solder bar auxiliary component 10 is positioned at one end of the varistor, and the free end of the solder bar corresponds to the pin of the varistor. By pulling the free end of the solder bar, it comes into contact with the pin of the varistor, and the soldering process is completed by the soldering component 11. The solder bar is released by rotating the solder bar take-up roller 102. In coordination with the soldering process, the solder bar is automatically fed to assist in the completion of the soldering.

[0031] By utilizing the pressing process of the varistor, the varistor is pressed and fixed while the solder bar is automatically positioned. At the same time, the solder bar auxiliary component 10 can be used to feed the solder bar quickly. The whole process can be completed synchronously without the need for manual positioning and feeding of the solder bar. The degree of automation is high, which can further shorten the soldering time and improve the soldering efficiency.

[0032] like Figure 5 and Figure 7 As shown, the welding assembly 11 includes a second snap-fit ​​bracket 111, which is movably snapped into the slide groove 9. A movable sleeve 112 is fixedly installed at the bottom end of the second snap-fit ​​bracket 111, and a movable ball 113 is movably snapped into the bottom end of the movable sleeve 112. The movable ball 113 rotates relative to the movable sleeve 112. An adjusting sleeve 114 is installed at the bottom end of the movable ball 113, and a welding machine 115 is movably connected inside the adjusting sleeve 114. The welding machine 115 moves back and forth relative to the adjusting sleeve 114.

[0033] While the solder bar is being fed, the angle of the soldering machine 115 is adjusted by rotating the movable ball 113, and the position of the soldering machine 115 is adjusted by moving the soldering machine 115, so that the soldering end of the soldering machine 115 comes into contact with the pin of the varistor, melting the fed solder bar and completing the pin soldering process.

[0034] Working principle and usage process: Preparation stage: Place the circuit board with the varistor inserted to be soldered on top of the workbench 1, turn on the power of the device. At this time, the power component 5 is not started, the clamping plate 2 is in the initial open position, and the pressing adjustment component 7 is in the raised state under the action of the linkage component 6. The operator manually adjusts the pressing adjustment component 7 according to the specific position of the varistor on the circuit board. Specifically, by moving the adjusting rod 703 left and right in the horizontal slot 702 of the pressure frame 701, the horizontal position of the pressure block 8 is adjusted. At the same time, by moving the vertical adjusting block 705 back and forth in the vertical slot 704 of the adjusting rod 703, the vertical position of the pressure block 8 is adjusted. Through the two-dimensional adjustment in the XY plane, ensure that the bottom end of the pressure block 8 is directly above the body of the varistor, and complete the preparation work before soldering. Clamping and pressing synchronization stage: Start the main motor 501 in the power assembly 5. The output end of the main motor 501 drives the bidirectional ball screw 502 to rotate. Since the middle part of the bidirectional ball screw 502 is movably connected to the bottom end of the worktable 1 through the limiting sleeve 503, its axial position remains unchanged when it rotates. The left and right ends of the bidirectional ball screw 502 have threads with the same direction of rotation. They are respectively threaded into the threaded grooves inside the two positioning blocks 4. Therefore, when the bidirectional ball screw 502 rotates, the two positioning blocks 4 will move towards each other or away from each other at the same time. Here, the main motor 501 drives the bidirectional ball screw 502 to make the two positioning blocks 4 move towards each other. Since the positioning blocks 4 are respectively installed at the bottom end of the two clamping plates 2, the clamping plates 2 drive the linkage plate 3 at the top of them to move towards each other synchronously. The clamping plates 2 move inward until their sides contact and clamp the circuit board, thus completing the clamping and fixing of the circuit board. Linkage pressing stage: When the left and right linkage plates 3 approach each other, the first fixed seat 601 installed on the inner side of the linkage plate 3 also approaches. The first fixed seat 601 pulls the connecting rod 603 through the rotating shaft. The other end of the connecting rod 603 is connected to the second fixed seat 602. The second fixed seat 602 is fixed on the pressure frame 701 of the pressing adjustment component 7. As the first fixed seat 601 approaches, the four connecting rods 603 are deflected diagonally downward after being subjected to force, and a downward thrust is applied to the second fixed seat 602. This thrust pushes the entire pressing adjustment component 7 and the pressure block 8 installed at its bottom to move downward as a whole. The pressure block 8 moves down until its bottom end contacts and presses against the body of the varistor, completing the pressure application and positioning fixation of the varistor. Thus, the two actions of clamping the circuit board and positioning the varistor are completed synchronously and automatically through the transmission of a set of power components 5 and linkage components 6. Welding stage: When the pressure block 8 is pressed down into place, the solder bar auxiliary component 10 and the welding component 11 installed in the sliding grooves 9 on both sides of the pressure block 8 also descend to the predetermined working position. The positioning hole 103 of the solder bar auxiliary component 10 is aligned with one pin of the varistor. The operator or the automated mechanism pulls the free end of the solder bar that passes through the positioning hole 103 to make it contact the pin. The solder bar can be continuously fed by rotating the solder bar take-up roller 102. At the same time, the welding component 11 is adjusted by rotating the movable ball 113 in the movable sleeve 112 to adjust the welding angle of the welding machine 115, and by moving the welding machine 115 back and forth in the adjusting sleeve 114 to adjust its front and back position, so that the welding end of the welding machine 115 contacts the pin and the solder bar, melts the solder bar, and completes the welding of the pin. This operation is repeated for the other pin to complete the welding of the entire varistor. Reset Phase: After welding is completed, the main motor 501 rotates in the reverse direction, driving the bidirectional ball screw 502 to reverse, and the two positioning blocks 4 move apart, causing the clamping plate 2 and the linkage plate 3 to be released to both sides. At the same time, the linkage plate 3 drives the pressing adjustment component 7 and the pressure block 8 to be lifted and reset as a whole through the linkage component 6, releasing the pressure on the varistor. The operator removes the welded circuit board and places a new circuit board, repeating the above process to achieve continuous welding.

Claims

1. A continuous welding device for varistor leads, comprising a workbench (1), characterized in that: The workbench (1) is symmetrically fitted with clamping plates (2) at its left and right ends. The clamping plates (2) are displaced left and right relative to the workbench (1). The top of each clamping plate (2) is fixedly fitted with a linkage plate (3). The middle of the bottom of each clamping plate (2) is fitted with a positioning block (4). The bottom of the workbench (1) is fitted with a power assembly (5). The outer side of the power assembly (5) is threadedly fitted with the two positioning blocks (4). A pressing adjustment assembly (7) is provided between the two linkage plates (3). A linkage assembly (6) is installed at each of the four corners of the pressing adjustment assembly (7). The other end of the linkage assembly (6) is connected to the linkage plate (3). A pressure block (8) is installed at the bottom of the pressing adjustment assembly (7). A sliding groove (9) is opened at both the left and right ends of the pressure block (8). A solder bar auxiliary assembly (10) and a welding assembly (11) are respectively movably fitted inside the two sliding grooves (9). The power component (5) is used to adjust the distance between the two clamping plates (2) and the two linkage plates (3), and to link the linkage component (6) to adjust the height of the pressing adjustment component (7). The pressing adjustment component (7) is used to adjust the planar position of the pressure block (8) to assist in welding and the export of welding rods.

2. The continuous welding equipment for varistor leads according to claim 1, characterized in that: The power assembly (5) includes a main motor (501), the outer side of which is connected to the bottom of the worktable (1), and a bidirectional ball screw (502) is installed at the output end of the main motor (501). A limiting sleeve (503) is fixedly sleeved in the middle of the bidirectional ball screw (502), and the outer side of the limiting sleeve (503) is movably sleeved to the bottom of the worktable (1).

3. The continuous welding equipment for varistor leads according to claim 2, characterized in that: Both positioning blocks (4) have threaded grooves inside, and the thread direction inside the left and right positioning blocks (4) is the same as the thread direction on the outer side of the bidirectional ball screw (502).

4. The continuous welding equipment for varistor leads according to claim 1, characterized in that: The linkage component (6) includes a second fixed seat (602), which is installed on the outer side of the pressing adjustment component (7) near the four corners. The end of the second fixed seat (602) away from the pressing adjustment component (7) is movably connected to a connecting rod (603) via a rotating shaft. The end of the connecting rod (603) away from the second fixed seat (602) is movably connected to a first fixed seat (601) via a rotating shaft. The other end of the first fixed seat (601) is connected to the inner side of the linkage plate (3).

5. The continuous welding equipment for varistor leads according to claim 4, characterized in that: The pressing adjustment assembly (7) includes a pressure frame (701), the outer side of which is connected to the second fixed seat (602). Both the front and rear ends of the pressure frame (701) are provided with transverse slots (702). An adjustment rod (703) is provided inside the pressure frame (701). The adjustment rod (703) is movably engaged with the pressure frame (701) through the transverse slots (702). The adjustment rod (703) moves left and right relative to the pressure frame (701).

6. The continuous welding equipment for varistor leads according to claim 1, characterized in that: The adjusting rod (703) has longitudinal slots (704) at both ends. The outer side of the adjusting rod (703) is provided with a longitudinal adjusting block (705). The longitudinal adjusting block (705) is movably engaged with the adjusting rod (703) through the longitudinal slots (704). The longitudinal adjusting block (705) moves back and forth relative to the adjusting rod (703). The bottom end of the longitudinal adjusting block (705) is connected to the pressure block (8).

7. The continuous welding equipment for varistor leads according to claim 1, characterized in that: The solder bar auxiliary component (10) includes a first snap-fit ​​bracket (101), which is movably snapped into the slide groove (9). A solder bar winding roller (102) is movably installed at one end of the first snap-fit ​​bracket (101) away from the pressure block (8). A positioning hole (103) is provided on one side of the first snap-fit ​​bracket (101). The solder bar winding roller (102) is used to wind the solder bar and the free end of the solder bar passes through the positioning hole (103).

8. The continuous welding equipment for varistor leads according to claim 1, characterized in that: The welding assembly (11) includes a second snap-fit ​​bracket (111), which is movably snapped into the slide groove (9). A movable sleeve (112) is fixedly installed at the bottom end of the second snap-fit ​​bracket (111), and a movable ball (113) is movably snapped into the bottom end of the movable sleeve (112). The movable ball (113) rotates relative to the movable sleeve (112).

9. The continuous welding equipment for varistor leads according to claim 8, characterized in that: An adjusting sleeve (114) is installed at the bottom of the movable ball (113). A welding machine (115) is movably connected inside the adjusting sleeve (114). The welding machine (115) moves back and forth relative to the adjusting sleeve (114).

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