A high-precision resistance welding device for a piezoresistor

Abstract

The application provides a high-precision resistance welding device for a pressure-sensitive resistor, relates to the field of pressure-sensitive resistor welding, and solves the problem of the existing high-precision resistance welding device for a pressure-sensitive resistor, that is, when continuously operating, the welding heat causes the positioning groove in the positioning mold to expand due to heat, the welding point of the chip and the pin is deviated, and the welding quality is reduced. The synchronous adjusting mechanism is arranged, the positioning mold is driven to slide along the annular groove and rotate by the synchronous adjusting mechanism, heat dissipation is performed on the positioning mold, the accumulation of welding heat in the positioning mold is reduced, the welding point of the chip and the pin is deviated, the welding quality is improved, the problem that the work efficiency is reduced due to manual discharging in the prior art is solved, the problem that the welding stability is reduced due to the accumulation of welding debris in the positioning mold in the prior art is solved, and the problem that the work efficiency is relatively low due to the step-by-step welding and bridge cutting in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of varistor welding, and more specifically, to a high-precision resistance welding apparatus for varistors. Background Technology

[0002] The high-precision resistance welding device for varistors is used to perform resistance welding between the varistor chip and the metal pins on both sides, ensuring that the solder joints are stable, reliable, and accurately positioned, thereby producing finished varistor components that meet electrical performance and structural requirements.

[0003] Existing high-precision resistance welding equipment for varistors consists of a frame, a positioning mold assembly, and upper and lower welding assemblies. In operation, the upper pin is placed on the upper surface of the chip, and the lower pin on the lower surface. The chip and pin are then placed in the positioning mold for positioning. The upper and lower welding assemblies drive the upper welding head downwards and the lower welding head upwards. Power is applied to the welding heads to weld the pins and chip. However, during welding, the welding heads generate heat, some of which is conducted to the positioning mold. As the varistor is continuously welded, the temperature inside the positioning mold rises continuously, causing the positioning groove within the mold to expand due to heat. This expansion leads to misalignment of the chip and pin, resulting in a reduction in welding quality. For existing semi-automatic high-precision resistance welding equipment, manual timed shutdowns for cooling are required, which reduces work efficiency.

[0004] Therefore, we have made improvements to this and proposed a high-precision resistance welding device for varistors. Summary of the Invention

[0005] The purpose of this invention is to address the problem that in existing high-precision resistance welding devices for varistors, the welding heat during continuous operation causes the positioning groove in the positioning mold to expand due to heat, resulting in misalignment of the solder joints between the chip and the pins, and thus a decrease in welding quality.

[0006] To achieve the above-mentioned objectives, the present invention provides a high-precision resistance welding apparatus for varistors to improve the aforementioned problems.

[0007] The application is as follows: Includes a mounting base, an upper and lower welding mechanism disposed on the mounting base, and a synchronous adjustment mechanism disposed on the mounting base; The synchronous adjustment mechanism includes an annular track on the mounting base, an annular groove on the annular track, a U-shaped seat slidably mounted on the annular track, a ball bearing mounted on the U-shaped seat, a rotating disk mounted on the U-shaped seat, an electric telescopic rod mounted on the rotating disk, a positioning mold mounted on the electric telescopic rod, a through hole mounted on the positioning mold, a drive shaft mounted on the rotating disk, a rack mounted on the annular track, a gear mounted on the drive shaft, and a moving component mounted on the U-shaped seat.

[0008] As a preferred technical solution of this application, the ball is slidably disposed on the annular groove, the through hole and the upper and lower welding mechanisms are adapted to each other, the drive shaft is rotatably disposed on the U-shaped seat, and the gear and rack are adapted to each other.

[0009] As a preferred technical solution of this application, the moving component includes a transmission shaft rotatably mounted on the U-shaped seat, a fixed seat mounted on the transmission shaft, a motor mounted on the fixed seat, a synchronous shaft mounted on the output end of the motor, the synchronous shaft rotatably mounted on the fixed seat, and rollers mounted on the synchronous shaft.

[0010] As a preferred technical solution of this application, the U-shaped seat is provided with a top moving plate, the top moving plate is provided with a sliding groove, a sliding column is slidably provided on the sliding groove, the rotating plate is provided with a semi-circular groove, a spring is provided on the corresponding surface of the sliding column and the sliding groove, and the top moving plate is slidably provided on the drive shaft.

[0011] As a preferred technical solution of this application, a second ball is rotatably disposed on the sliding column, and the second ball and the semi-circular groove are adapted to each other.

[0012] As a preferred technical solution of this application, an adjusting ring is rotatably provided on the rotating disk, an electric telescopic rod II is provided on the top moving disk, and a limiting cavity is provided inside the U-shaped seat.

[0013] As a preferred technical solution of this application, the adjusting ring is disposed at the output end of the electric telescopic rod II, and the jacking plate is slidably disposed within the limiting cavity.

[0014] As a preferred technical solution of this application, the rotating disk is provided with a discharge hole, the discharge hole is inclined, and the discharge hole and the through hole are adapted to each other.

[0015] As a preferred technical solution of this application, the mounting base is provided with a fixing frame, and the fixing frame is provided with a wedge-shaped part.

[0016] As a preferred technical solution of this application, the wedge-shaped part and the positioning mold are adapted to each other, and the U-shaped seat is adapted to the rotating disk and the fixed frame.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: 1. In order to solve the problem that in the existing high-precision resistance welding device for varistor, the welding heat causes the positioning groove in the positioning mold to expand due to heat during continuous operation, resulting in misalignment of the solder joint between the chip and the pin and a decrease in welding quality, this application sets up a synchronous adjustment mechanism. The synchronous adjustment mechanism drives the positioning mold to slide and rotate along the annular groove to dissipate heat, thereby reducing the accumulation of welding heat in the positioning mold and the resulting misalignment of the solder joint between the chip and the pin, thus improving the welding quality; 2. By setting a synchronous adjustment mechanism, the positioning mold is driven to unfold and rotate, realizing the automatic unloading of chips and pins after welding, reducing the manual material handling process, improving work efficiency, and solving the problem of reduced work efficiency caused by manual material handling in the existing technology; 3. By setting a synchronous adjustment mechanism, the positioning mold is driven to vibrate, and the debris inside the positioning mold is cleaned by vibration. This reduces the accumulation of welding debris inside the positioning mold, prevents the debris from affecting the subsequent positioning of pins and chips, improves the stability of welding, and solves the problem of reduced welding stability caused by the accumulation of welding debris inside the positioning mold in the prior art. 4. By using a synchronous adjustment mechanism, the wedge-shaped part is driven to cut the U-shaped material bridge of the pin, which reduces the secondary transfer, cutting and clamping of the workpiece, improves the efficiency of work, and solves the problem of low work efficiency caused by the separate steps of welding and material bridge cutting in the existing technology. Attached Figure Description

[0018] Figure 1 A schematic diagram of the high-precision resistance welding apparatus for varistors provided in this application; Figure 2 A partial cross-sectional view of the mounting base for the high-precision resistance welding device for varistors provided in this application; Figure 3 A schematic diagram of the overall structure of the U-shaped base of the high-precision resistance welding device for varistors provided in this application; Figure 4 A partial cross-sectional view of the U-shaped base of the high-precision resistance welding device for varistors provided in this application; Figure 5 A partial cross-sectional view of the rotating disk of the high-precision resistance welding apparatus for varistors provided in this application; Figure 6 A schematic diagram of the internal structure of the U-shaped base of the high-precision resistance welding device for varistors provided in this application; Figure 7 The high-precision resistance welding apparatus for varistors provided in this application Figure 6 Enlarged structural diagram of area A in the middle; Figure 8 A schematic diagram of the internal structure of the top moving plate of the high-precision resistance welding device for varistors provided in this application.

[0019] The image shows: 1. Mounting base; 101. Upper and lower welding mechanism; 2. Synchronous adjustment mechanism; 201. Circular track; 202. Circular groove; 203. U-shaped seat; 204. Ball bearing 1; 205. Rotating disk; 206. Electric telescopic rod 1; 207. Positioning mold; 208. Through hole; 209. Drive shaft; 210. Rack; 211. Gear; 212. Top plate; 213. Sliding groove; 214. Sliding column; 215. Semicircular groove; 216. Spring; 217. Ball bearing 2; 218. Adjusting ring; 219. Electric telescopic rod 2; 220. Limiting cavity; 221. Discharge hole; 222. Fixing frame; 223. Wedge-shaped part; 3. Moving components; 301. Drive shaft; 302. Fixed base; 303. Motor; 304. Synchronous shaft; 305. Roller. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0021] As described in the background art, during continuous operation, the welding heat of the high-precision resistance welding device for varistors causes the positioning groove in the positioning mold to expand due to heat, which causes the solder joints between the chip and the pin to be misaligned, resulting in a decrease in the quality of the welding.

[0022] To address this technical problem, the present invention provides a high-precision resistance welding device for varistors, which is applied to varistor welding.

[0023] For details, please refer to Figure 1 - Figure 8As shown, the high-precision resistance welding device for varistor specifically includes: a mounting base 1, an upper and lower welding mechanism 101 disposed on the mounting base 1, and a synchronous adjustment mechanism 2 disposed on the mounting base 1. In the prior art, the upper and lower welding mechanism 101 is used to drive the upper welding head to press down and the lower welding head to push up, and to squeeze and weld the upper pin, chip and lower pin through the upper and lower welding heads. The synchronous adjustment mechanism 2 includes an annular track 201 mounted on the mounting base 1, an annular groove 202 mounted on the annular track 201, a U-shaped seat 203 slidably mounted on the annular track 201, a ball bearing 204 rotatably mounted on the U-shaped seat 203, a rotating disk 205 rotatably mounted on the U-shaped seat 203, an electric telescopic rod 206 mounted on the rotating disk 205, a positioning mold 207 mounted on the electric telescopic rod 206, a through hole 208 mounted on the positioning mold 207, a drive shaft 209 mounted on the rotating disk 205, a rack 210 mounted on the annular track 201, a gear 211 mounted on the drive shaft 209, and a moving component 3 mounted on the U-shaped seat 203.

[0024] The high-precision resistance welding apparatus for varistors provided by this invention addresses the problem in the prior art where, during continuous operation, the welding heat causes the positioning groove within the positioning mold 207 to expand, resulting in misalignment of the solder joints between the chip and the pins and a decrease in welding quality. This application addresses this issue by using a synchronous adjustment mechanism 2 to drive the positioning mold 207 to slide and rotate along the annular groove 202 to dissipate heat, thereby reducing the accumulation of welding heat within the positioning mold 207 and preventing misalignment of the solder joints between the chip and the pins, thus improving the welding quality. By using the synchronous adjustment mechanism 2, the positioning mold 207 is driven to unfold and rotate, which realizes the automatic unloading of chips and pins after welding, reduces the manual material handling process, improves work efficiency, and solves the problem of reduced work efficiency caused by manual material handling in the prior art. The synchronous adjustment mechanism 2 drives the positioning mold 207 to vibrate, thereby cleaning up the debris inside the positioning mold 207. This reduces the accumulation of welding debris inside the positioning mold 207, prevents the debris from affecting the subsequent positioning of pins and chips, improves the stability of welding, and solves the problem of reduced welding stability caused by the accumulation of welding debris inside the positioning mold 207 in the prior art. By using the synchronous adjustment mechanism 2, the wedge-shaped part 223 is driven to cut the U-shaped material bridge of the pin, which reduces the secondary transfer, cutting and clamping of the workpiece, improves the work efficiency, and solves the problem of low work efficiency caused by the separate steps of welding and material bridge cutting in the prior art.

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a high-precision resistance welding device for varistors has a ball bearing 204 slidably disposed on an annular groove 202, a through hole 208 and an upper and lower welding mechanism 101 adapted to each other, a drive shaft 209 rotatably disposed on a U-shaped seat 203, and a gear 211 and a rack 210 adapted to each other. During use, place the pins and chip on the positioning mold 207, such as... Figure 5 As shown, two sets of positioning molds 207 are provided. When the electric telescopic rod 206 is activated, it drives the two sets of positioning molds 207 to press and fix the pins and chips. The output end of the upper and lower welding mechanism 101 passes through the through-groove to press and weld the upper pin, chip, and lower pin. When welding is complete, the moving component 3 drives the U-shaped seat 203 to slide along the annular track 201. The U-shaped seat 203 drives the rotating disk 205, positioning molds 207, gears 211, drive shaft 209, ball bearings 204, pins, and chips to move synchronously. Two sets of ball bearings 204 are provided, as shown... Figure 4As shown, the U-shaped seat 203 is prevented from disengaging from the annular track 201 by ball bearing 204. Ball bearing 204 and annular groove 202 guide the U-shaped seat 203. Gear 211 is displaced and meshes with rack 210. Rack 210 drives gear 211 to rotate, gear 211 drives drive shaft 209 to rotate, drive shaft 209 drives rotating disk 205, positioning mold 207, pins and chips to rotate synchronously. Electric telescopic rod 206 drives two sets of positioning molds 207 to slide synchronously back to back. At this time, the soldered chip and pins are released from the limit of positioning mold 207. Through the rotation of positioning mold 207, the soldered chip and pins rotate synchronously and are released from positioning mold 207 by their own weight. This method realizes automatic material discharge of varistor, reduces manual material handling process, and improves work efficiency. The two sets of positioning molds 207 slide back to back and expose their internal positioning grooves. Figure 1 As shown, the positioning mold 207 is slid and rotated along the annular groove 202 to dissipate heat. This method of heat dissipation of the positioning mold 207 reduces the accumulation of welding heat inside the positioning mold 207, thereby reducing the misalignment of the solder joints between the chip and the pin and improving the welding quality. After the U-shaped base 203 and the positioning mold 207 have moved one revolution along the annular groove 202, the next chip and pin can be welded in the same way, realizing a continuous welding process. Furthermore, the moving component 3 includes a drive shaft 301 rotatably mounted on the U-shaped seat 203, a fixed seat 302 mounted on the drive shaft 301, a motor 303 mounted on the fixed seat 302, a synchronous shaft 304 mounted on the output end of the motor 303, the synchronous shaft 304 rotatably mounted on the fixed seat 302, and a roller 305 mounted on the synchronous shaft 304. Start the motor 303, which drives the synchronous shaft 304 to rotate. The rotation of the synchronous shaft 304 drives the roller 305 to rotate. The rotation of the roller 305 drives the U-shaped seat 203 to slide along the annular groove 202. The transmission shaft 301 is used to adjust the direction of the displacement of the roller 305. Furthermore, a top plate 212 is provided on the U-shaped seat 203, a sliding groove 213 is provided on the top plate 212, a sliding column 214 is slidably provided on the sliding groove 213, a semi-circular groove 215 is provided on the rotating plate 205, a spring 216 is provided on the corresponding surface of the sliding column 214 and the sliding groove 213, and the top plate 212 is slidably provided on the drive shaft 209; Furthermore, a second ball bearing 217 is rotatably mounted on the sliding column 214, and the second ball bearing 217 and the semi-circular groove 215 are mutually adapted. like Figure 5As shown, when the rotating disk 205 rotates, the semi-circular groove 215 on the rotating disk 205 rotates synchronously. When the second ball 217 disengages from the semi-circular groove 215, the rotating disk 205 presses the second ball 217. The second ball 217 and the sliding post 214 slide along the sliding groove 213. The sliding post 214 slides and presses the spring 216. When the second ball 217 engages with the semi-circular groove 215, the elasticity of the spring 216 drives the second ball 217 and the sliding post 214 to slide back synchronously along the sliding groove 213. Through the sliding back of the second ball 217 and its impact on the semi-circular groove 215, the second ball 217... The rotating disk 205 generates vibration, which assists in the unloading of the soldered chips and pins, preventing chips and pins from sticking inside the positioning mold 207 and causing incomplete unloading, thus improving unloading efficiency. The vibration also accelerates the convection between the positioning mold 207 and the air, improving heat dissipation efficiency. After the pins and chips on the positioning mold 207 are unloaded, the vibration cleans the debris inside the positioning mold 207, reducing the accumulation of soldering debris inside the positioning mold 207 and preventing debris from affecting the subsequent positioning of pins and chips, thus improving the stability of soldering. Furthermore, an adjusting ring 218 is rotatably provided on the rotating disk 205, an electric telescopic rod 219 is provided on the top moving disk 212, and a limiting cavity 220 is provided inside the U-shaped seat 203; Furthermore, the adjusting ring 218 is set at the output end of the electric telescopic rod 219, and the top plate 212 is slidably set in the limiting cavity 220; The electric telescopic rod 219 pushes the adjusting ring 218, which unfolds and drives the pushing plate 212 to slide along the limiting cavity 220 and the drive shaft 209. The pushing plate 212 drives the ball bearing 217 to slide synchronously. The ball bearing 217 on the pushing plate 212 disengages from the semi-circular groove 215. At this time, when the rotating disk 205 rotates, the ball bearing 217 and the semi-circular groove 215 do not contact each other, so the pushing plate 212 cannot vibrate. This method achieves controllable vibration and improves the practicality of the equipment. Furthermore, the rotating disk 205 is provided with a discharge hole 221, which is inclined and the discharge hole 221 and the through hole 208 are adapted to each other. The discharge port 221 and the limiting cavity 220 are interconnected. When the electric telescopic rod 219 retracts, it drives the actuating plate 212 to slide along the direction of the rotating plate 205. The actuating plate 212 slides and compresses the air in the limiting cavity 220, causing the air in the limiting cavity 220 to be discharged from the discharge port 221. Figure 7As shown, the discharge hole 221 is aligned with the through hole 208. When the chip and pin soldering is finished, the air discharged through the discharge hole 221 cools the soldered chip and pin in the through hole 208. When the soldered pin and chip are automatically discharged, the temperature of the chip and pin is reduced by air cooling, which reduces the possibility of pin deformation due to high temperature when the chip and pin are discharged. The synchronous adjustment mechanism 2 drives the positioning mold 207 to slide and rotate along the annular groove 202 to dissipate heat, reducing the accumulation of welding heat in the positioning mold 207 and preventing misalignment of the solder joints between the chip and the pin, thus improving the welding quality. The synchronous adjustment mechanism 2 also drives the positioning mold 207 to unfold and rotate, realizing automatic unloading of the chip and pin after welding, reducing the manual material handling process and improving work efficiency. The synchronous adjustment mechanism 2 also drives the positioning mold 207 to vibrate, which cleans up the debris in the positioning mold 207, reducing the accumulation of welding debris in the positioning mold 207 and preventing debris from affecting the subsequent positioning of the pin and chip, thus improving the stability of welding.

[0029] Example 2 further optimizes the high-precision resistance welding device for varistors provided in Example 1, specifically, as follows: Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a fixing frame 222 is provided on the mounting base 1, and a wedge-shaped part 223 is provided on the fixing frame 222; Furthermore, the wedge-shaped part 223 and the positioning mold 207 are adapted to each other, and the U-shaped seat 203 is adapted to the rotating disk 205 and the fixed frame 222; When the chip and pin soldering is complete, the positioning mold 207 rotates and slides along the annular track 201, as... Figure 1 As shown, the pins rotate and move synchronously, the positioning mold 207 rotates and slides against the fixed frame 222, the pins and the wedge-shaped part 223 come into contact, and the U-shaped material bridge of the pins is cut by the wedge-shaped part 223, so that the integrated pins are separated into two independent pins, reducing the subsequent cutting process, reducing the secondary transfer, cutting and clamping of the workpiece, improving the efficiency of the work, and the welding residual heat raises the pin temperature, which softens the pin material and improves the cutting stability of the wedge-shaped part 223; The synchronous adjustment mechanism 2 drives the wedge part 223 to cut the U-shaped material bridge of the pin, which reduces the secondary transfer, cutting and clamping of the workpiece and improves the efficiency of the work.

[0030] The high-precision resistance welding device for varistors provided by this invention is used as follows: In use, the pins and chips are placed on the positioning mold 207. The electric telescopic rod 206 is activated, which drives the two sets of positioning molds 207 to press and fix the pins and chips. The output end of the upper and lower welding mechanism 101 passes through the through slot to press and weld the upper pin, chip, and lower pin. When welding is finished, the motor 303 is activated, which drives the synchronous shaft 304 to rotate. The synchronous shaft 304 rotates and drives the roller 305 to rotate. The rotation of the roller 305 drives the U-shaped seat 203 to slide along the annular groove 202. The U-shaped seat 203 drives the rotating disk 205, positioning mold 207, gear 211, drive shaft 209, ball bearing 204, pins, and chips to move synchronously. The gear 211 moves and moves in tandem with the rack 202. 10 meshing, rack 210 drives gear 211 to rotate, gear 211 drives drive shaft 209 to rotate, drive shaft 209 drives rotating disk 205, positioning mold 207, pins and chips to rotate synchronously, positioning mold 207 rotates and slides against fixed frame 222, pins contact wedge part 223, wedge part 223 cuts the U-shaped material bridge of pins, so that the integrated pins are separated into two independent pins, electric telescopic rod 219 retracts, electric telescopic rod 219 drives top plate 212 to slide along the direction of rotating disk 205, top plate 212 slides and squeezes the air in limiting cavity 220, so that the air in limiting cavity 220 is discharged from discharge hole 221, the air discharged through discharge hole 221 passes through through hole 20 The soldered chips and pins are air-cooled. At this time, the push plate 212 and the rotating plate 205 are in contact. The electric telescopic rod 206 drives the two sets of positioning molds 207 to slide synchronously in opposite directions. The soldered chips and pins are then released from the limit of the positioning molds 207. With the rotation of the positioning molds 207, the soldered chips and pins rotate synchronously and are released from the positioning molds 207 by their own weight. This method realizes the automatic discharge of the varistor. The rotating plate 205 rotates, and the semi-circular groove 215 on the rotating plate 205 rotates synchronously. When the ball bearing 217 disengages from the semi-circular groove 215, the rotating plate 205 squeezes the ball bearing 217. The ball bearing 217 and the sliding column 214 slide along the sliding groove 213. The sliding column 214 slides and squeezes. When the second ball 217 and the semi-circular groove 215 are engaged, the elasticity of the spring 216 drives the second ball 217 and the sliding column 214 to slide and reset synchronously along the sliding groove 213. The second ball 217 slides and resets and impacts the semi-circular groove 215, causing the rotating disk 205 to vibrate. The vibration cleans the debris in the positioning mold 207, reducing the accumulation of welding debris in the positioning mold 207. The positioning mold 207 slides and rotates along the annular groove 202 to dissipate heat, reducing the accumulation of welding heat in the positioning mold 207. After the U-shaped seat 203 and the positioning mold 207 have moved one revolution along the annular groove 202, the next chip and pin can be welded, realizing a continuous welding process.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A high-precision resistance welding device for varistors, comprising a mounting base (1) and an upper and lower welding mechanism (101) disposed on the mounting base (1), characterized in that, Includes a synchronous adjustment mechanism (2) disposed on the mounting base (1); The synchronous adjustment mechanism (2) includes an annular track (201) provided on the mounting base (1), an annular groove (202) provided on the annular track (201), a U-shaped seat (203) slidably provided on the annular track (201), a ball bearing (204) rotatably provided on the U-shaped seat (203), a rotating disk (205) rotatably provided on the U-shaped seat (203), an electric telescopic rod (206) provided on the rotating disk (205), a positioning mold (207) provided on the electric telescopic rod (206), a through hole (208) provided on the positioning mold (207), a drive shaft (209) provided on the rotating disk (205), a rack (210) provided on the annular track (201), a gear (211) provided on the drive shaft (209), and a moving component (3) provided on the U-shaped seat (203).

2. The high-precision resistance welding device for varistors according to claim 1, characterized in that, The ball bearing (204) is slidably disposed on the annular groove (202), the through hole (208) and the upper and lower welding mechanism (101) are adapted to each other, the drive shaft (209) is rotatably disposed on the U-shaped seat (203), and the gear (211) and the rack (210) are adapted to each other.

3. The high-precision resistance welding device for varistors according to claim 2, characterized in that, The moving component (3) includes a drive shaft (301) rotatably mounted on the U-shaped seat (203), a fixed seat (302) mounted on the drive shaft (301), a motor (303) mounted on the fixed seat (302), a synchronous shaft (304) mounted on the output end of the motor (303), the synchronous shaft (304) rotatably mounted on the fixed seat (302), and a roller (305) mounted on the synchronous shaft (304).

4. The high-precision resistance welding device for varistors according to claim 3, characterized in that, The U-shaped seat (203) is provided with a top moving plate (212), the top moving plate (212) is provided with a sliding groove (213), the sliding groove (213) is slidably provided with a sliding column (214), the rotating plate (205) is provided with a semi-circular groove (215), the corresponding surfaces of the sliding column (214) and the sliding groove (213) are provided with springs (216), and the top moving plate (212) is slidably provided on the drive shaft (209).

5. A high-precision resistance welding device for varistors according to claim 4, characterized in that, The sliding column (214) is rotatably provided with a second ball (217), and the second ball (217) and the semi-circular groove (215) are adapted to each other.

6. A high-precision resistance welding device for varistors according to claim 5, characterized in that, An adjusting ring (218) is rotatably mounted on the rotating disk (205), an electric telescopic rod (219) is mounted on the top moving disk (212), and a limiting cavity (220) is provided inside the U-shaped seat (203).

7. A high-precision resistance welding apparatus for varistors according to claim 6, characterized in that, The adjusting ring (218) is located at the output end of the electric telescopic rod (219), and the top moving plate (212) is slidably located in the limiting cavity (220).

8. A high-precision resistance welding apparatus for varistors according to claim 7, characterized in that, The rotating disk (205) is provided with a discharge hole (221), which is inclined and the discharge hole (221) and the through hole (208) are adapted to each other.

9. A high-precision resistance welding device for varistors according to claim 8, characterized in that, The mounting base (1) is provided with a fixing frame (222), and the fixing frame (222) is provided with a wedge-shaped part (223).

10. A high-precision resistance welding device for varistors according to claim 9, characterized in that, The wedge-shaped part (223) and the positioning mold (207) are adapted to each other, and the U-shaped seat (203) is adapted to the rotating disk (205) and the fixed frame (222).

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