Spot welding equipment

Abstract

The spot welding equipment is mainly composed of a spot welding machine and a spot welding auxiliary structure, the spot welding machine comprises a transformer, electrodes, a controller, a machine body and other conventional components, and the spot welding auxiliary structure is arranged between the upper electrode and the lower electrode of the spot welding machine and fixed to one side of the lower electrode. Core components of the device comprise a lifting frame, a double-sided toothed plate, a spring rod, a push block, an auxiliary pressing rod, a reset rod, a sliding box, a ratchet gear, a reciprocating lead screw, a reciprocating sliding seat, an exhaust pipe, a click air pipe, a cleaning air pipe, a telescopic pipe, a cleaning box, an impeller, a cleaning piece and the like. Through the arrangement of the spot welding auxiliary structure, the spot welding quality and efficiency of the automobile parts are remarkably improved, the spot welding auxiliary structure plays an important role in promoting the part machining link of the automobile manufacturing industry, has remarkable advantages in the aspects of guaranteeing the product quality and improving the production benefits, and provides a reliable equipment solution for the automobile part welding process.

Description

Technical Field

[0001] The invention relates to the technical field of parts processing, in particular to a spot welding device. Background Art

[0002] Today, the automobile industry is booming, and the production and manufacturing processes of automobile parts are also constantly innovating. The quality and manufacturing precision of automobile parts are directly related to the safety, reliability and performance of the entire vehicle. In automobile production, many parts need to be assembled through welding processes to build a stable and precise structure. In this context, spot welding machines have become an indispensable key equipment in automobile parts processing with their unique advantages. They can efficiently and accurately complete the welding of various welding points, greatly improve production efficiency, ensure welding quality, and meet the stringent needs of large-scale automobile production.

[0003] When spot welding automobile parts, the current spot welding machine has bumps and depressions on the workpiece surface because it is not an absolutely smooth plane. Therefore, the workpieces are in a point-to-point contact state. After the spot welding machine pre-presses the workpiece and energizes it, the contact points will melt due to resistance heat. Sometimes there will be a certain gap between the melted metals. As the contact points continue to melt, the contact area between the workpieces increases. Sometimes there may be gas cavities between the molten metals. In this case, the stability of the workpiece after spot welding is affected.

[0004] To this end, a spot welding device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a spot welding device to solve the problem of possible gas cavities between workpieces after spot welding mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a spot welding device, comprising: The spot welding machine is mainly composed of a transformer, an electrode, a controller and a machine body; The spot welding auxiliary structure is arranged between the upper and lower electrodes of the spot welding machine and is fixed to one side of the lower electrode by bolts; Among them, the spot welding auxiliary structure includes a lifting frame. A double-sided toothed plate is slidably arranged above the interior of the lifting frame, and a spring rod is fixedly connected to the lower end of the double-sided toothed plate. A push block is slidably defined at the upper-middle position on the left side inside the double-sided toothed plate through a spring member. A secondary driving pressure rod for pushing down the push block is fixedly arranged on the bottom surface of the upper electrode of the spot welder according to the position of the push block. A reset rod is bolted to the surface of the lifting frame directly below the push block. Below the two tooth sides of the double-sided toothed plate, ratchet gears are meshingly driven, and the axles of the ratchet gears are fixedly connected to reciprocating lead screws rotatably arranged inside a sliding box. A reciprocating slide seat is reciprocatingly driven on the rod body of the reciprocating lead screw, and the reciprocating slide seat is slidably defined inside a slide chamber opened inside the sliding box. The two reciprocating slide seats are respectively fixedly connected to a double-headed piston rod slidably sealed inside an air extraction pipe through connecting rods at the central positions on the left and right sides. One end of the air extraction pipe is equipped with a one-way valve. An air pressure channel is axially penetrated through the central position inside the double-headed piston rod, and a pressure relief valve is assembled inside the air pressure channel. The two air extraction pipes are respectively integrally communicated with a spot welding air pipe and a cleaning air pipe at the opposite ends of the one-way valve; Among them, a click rod is slidably sealed and defined inside the spot welding air pipe in cooperation with a reset spring near the lower end; The spherical end of the cleaning air pipe is rotatably connected to the spherical end of the telescopic pipe. A positioning motor is fixed on the upper surface of the spherical end of the cleaning air pipe, and the machine shaft of the positioning motor is fixedly connected to the spherical end of the valve body pipe through a coupling. And one end of the valve body pipe is fixedly communicated and arranged above the side surface of the telescopic pipe. The lower end of the telescopic pipe is fixed at the center position of the upper end surface of the cleaning box. Inside the cleaning box, an air-pushing air path extends downward from the communicating end with the telescopic pipe. An impeller is rotatably arranged inside the rotating chamber of the air-pushing air path. The rotating shaft of the impeller extends out of the cleaning box and is fixed to a cleaning piece arranged directly below the cleaning box. A plurality of strip-shaped grooves and hole grooves are annularly arrayed along the axis inside the cleaning piece, and the hole grooves are distributed between the strip-shaped grooves. And grinding blocks and magnets are respectively fixedly connected inside the strip-shaped grooves and the hole grooves. The grinding blocks are T-shaped, and the lower surfaces have grinding patterns and are flush with the lower surface of the cleaning piece. The height of the magnets is higher than the lower port of the hole grooves.

[0007] Preferably, the lifting frame is a rail structure with a cross-shaped chute inside, and the lower end is bolted to the surface of the mounting block of the lower electrode of the spot welder and is adaptively set away from the electrode according to the volume of the workpiece. The spring rod is composed of a telescopic rod and a spring sleeved on the telescopic rod, and the lower end of the spring rod is fixed to a baffle below the interior of the lifting frame. The spring member is composed of a sliding rod and a spring sleeved on the sliding rod.

[0008] Preferably, the push block is a T-shaped slider, and the end passing through the double-sided toothed plate is provided with an inclined surface that slopes from top to bottom and from front to back.

[0009] Preferably, the angle of the auxiliary dynamic pressure rod inclined plane is the same as that of the push block, and the upper end of the reset rod is provided with an inclined plane with the same inclination angle as the push block.

[0010] Preferably, each ratchet gear is composed of a ratchet wheel and a tooth ring sleeved and fixed on the ratchet wheel, and the rotation directions of the two ratchet wheels under force are opposite.

[0011] Preferably, the lower end of the clicking rod passes through the clicking air pipe, and a hard high-temperature-resistant plastic sphere is rotatably arranged at the passing-out end through a ball seat. And initially, there is a spacing between the clicking rod and the workpiece. An exhaust hole communicating through is opened at the position of the side surface of the clicking air pipe where the clicking rod is located in the chute, and the position of the exhaust hole is set according to the distance between the clicking rod and the electrode and the thickness of the workpiece.

[0012] Preferably, at least a ring channel allowing the valve body pipe to rotate by 90 degrees is opened on the surface of the ball end of the cleaning air pipe according to the pipe body of the valve body pipe.

[0013] Preferably, the telescopic pipe is composed of a pipe body and a sphere integrally arranged at one end of the pipe body. Wherein, an L-shaped valve hole is opened inside the sphere from the output end of the cleaning air pipe to the input end of the pipe body.

[0014] Preferably, the telescopic pipe is composed of a telescopic hose and mounting pipes fixed at both ends of the hose. Wherein, a lifting electric push rod is fixedly arranged on the upper end surface of the mounting pipe, and the output rod of the lifting electric push rod extends into the interior of the telescopic pipe to the lower mounting pipe and is fixed to the cleaning box.

[0015] Preferably, the cleaning piece is composed of a circular plate and a friction piece fixed on the bottom surface of the circular plate. And a fence-shaped infiltration pore channel is opened inside the circular plate towards the friction piece, and a liquid supply bottle for liquid supply is fixedly arranged at the output end of the infiltration pore channel.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the settings of the lifting frame, double-sided toothed plate, spring rod, reset rod, push block, spring member, auxiliary driving pressure rod, sliding box, ratchet gear, reciprocating lead screw, reciprocating sliding seat, air extraction pipe, one-way valve, double-headed piston rod, compressed air airway, cleaning air pipe, position adjustment motor, valve body pipe, telescopic pipe, lifting electric push rod, cleaning box, air-pushing air path, impeller, cleaning piece, cutting and grinding block, and magnet, during the pre-pressing and moving process of the electrode, under the push of the auxiliary driving pressure rod, the double-sided toothed plate can be pushed downward in cooperation with the push block. Then, the downward-moving push block is used to engage and drive the ratchet gear, which coaxially drives the reciprocating lead screw to reciprocally drive the reciprocating sliding seat and the double-headed piston rod. During the reciprocating movement, in cooperation with the one-way valve and the pressure relief valve, external gas is sucked in and the sucked gas is compressed and output to the inside of the cleaning air pipe. Then, the pressurized gas passes through the valve body pipe, telescopic pipe to the air-pushing air path to blow the impeller. Thus, driven by the rotating impeller for the cleaning piece, in cooperation with the cleaning liquid and the cutting and grinding block, not only can the oil stains, impurities and oxide layers at the welding position be effectively removed, making the welding surface cleaner, but also the surface of the workpiece can be made flatter, increasing the contact area between automotive parts, enabling the current to be more evenly distributed in the welding area, reducing local overheating and spatter phenomena, increasing the bonding force between metals during welding, reducing welding defects caused by the presence of impurities, significantly improving the welding effect between automotive parts, ensuring the quality and reliability of the welded joint, reducing the rejection rate, and improving the production efficiency and product consistency; 2. Through the settings of the lifting frame, double-sided toothed plate, spring rod, reset rod, push block, spring member, auxiliary driving pressure rod, sliding box, ratchet gear, reciprocating lead screw, reciprocating sliding seat, air extraction pipe, one-way valve, double-headed piston rod, compressed air airway, clicking air pipe, clicking rod, and reset spring, during the welding process, the movement of the double-sided toothed plate drives the left ratchet gear to drive the reciprocating lead screw, causing the double-headed piston rod to press air into the clicking air pipe, pushing the lower end of the clicking rod to strike the rear side of the spot welding position on the surface of the automotive part. This micro-vibration effect can effectively eliminate the bubbles between the molten metals, making the distribution of the molten metals more uniform. By improving the metal fusion state, problems such as looseness and reduced strength of the welding point caused by the residual bubbles are avoided, enhancing the density and mechanical properties of the spot welding part, improving the overall structural strength and stability of the automotive part after spot welding, and ensuring the safety and durability of the vehicle during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural view of the present invention.

[0018] Figure 2 It is a schematic diagram of the spot welder and the auxiliary driving pressure rod of the present invention.

[0019] Figure 3 It is a schematic diagram of the spot welding auxiliary structure of the present invention.

[0020] Figure 4 Schematic diagram of the lifting frame and its connection structure of the present invention.

[0021] Figure 5 Schematic cross-sectional view of the double-sided toothed plate of the present invention.

[0022] Figure 6 Cross-sectional view of the sliding box, exhaust pipe, clicking air pipe and cleaning air pipe of the present invention.

[0023] Figure 7 Exploded view of the sliding box, exhaust pipe, clicking air pipe and cleaning air pipe of the present invention.

[0024] Figure 8 Schematic diagram of the cleaning sheet and its connection structure of the present invention.

[0025] In the figure: 1. Spot welder; 2. Spot welding auxiliary structure; 21. Lifting frame; 211. Double-sided toothed plate; 212. Spring rod; 213. Reset rod; 214. Push block; 2141. Spring member; 215. Auxiliary driving pressure rod; 22. Sliding box; 221. Ratchet gear; 222. Reciprocating lead screw; 223. Reciprocating sliding seat; 23. Exhaust pipe; 231. Check valve; 232. Double-headed piston rod; 2321. Compressed air airway; 24. Clicking air pipe; 241. Clicking rod; 242. Return spring; 25. Cleaning air pipe; 251. Position adjustment motor; 252. Valve body pipe; 253. Telescopic pipe; 254. Lifting electric push rod; 255. Cleaning box; 2551. Air-pushing air path; 2552. Impeller; 256. Cleaning sheet; 2561. Liquid replenishing bottle; 2562. Cutting and grinding block; 2563. Magnet. Detailed implementation manners

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

[0027] Please refer to Figures 1 to 8 , the present invention provides a technical solution for a spot welding device: A spot welding device, comprising: A spot welder 1, mainly composed of a transformer, electrodes, a controller and a fuselage; The spot welding auxiliary structure 2 is arranged between the upper and lower electrodes of the spot welding machine 1 and is fixed to one side of the lower electrode by bolts; Among them, the spot welding auxiliary structure 2 includes a lifting frame 21, which is a rail structure with a cross-shaped slide groove inside, and the lower end is fixed to the surface of the mounting block of the lower electrode of the spot welding machine 1 by bolts, and is set away from the electrode according to the volume adaptability of the workpiece. A double-sided toothed plate 211 is slidably arranged on the upper part of the lifting frame 21, and the lower end of the double-sided toothed plate 211 is fixedly connected to a spring rod 212, which is composed of a telescopic rod and a spring sleeved on the telescopic rod, and the lower end of the spring rod 212 is fixed to the baffle at the lower part of the lifting frame 21, and a T-shaped slide groove is opened in the middle and upper position of the left side of the double-sided toothed plate 211, and The inside of the slide groove is provided with a push block 214 by slidingly limiting the spring member 2141. The spring member 2141 is composed of a slide rod and a spring sleeved on the slide rod. The push block 214 is a T-shaped slider, and one end of the push block 214 passing through the double-sided tooth plate 211 is provided with an inclined surface inclined from top to bottom and from front to back. The bottom surface of the upper electrode of the spot welding machine 1 is fixedly provided with an auxiliary pressure rod 215 for pushing the push block 214 downward according to the position of the push block 214, and the angle of the inclined surface of the auxiliary pressure rod 215 is the same as that of the push block 214. The surface of the lifting frame 21 is connected to a reset rod 213 by bolts directly below the push block 214, and the upper end of the reset rod 213 is set The inclined surface with the same inclination angle as the push block 214 is used to push the push block 214 to slide inside the double-sided toothed plate 211. The lower part of the two tooth sides of the double-sided toothed plate 211 is meshed with a ratchet gear 221, and the wheel axle of the ratchet gear 221 is fixed to the reciprocating screw rod 222 rotatably arranged inside the slide box 22. The ratchet gear 221 is composed of a ratchet wheel and a toothed ring sleeved and fixed on the ratchet wheel, and the two ratchet wheels are subjected to force and rotate in opposite directions. A reciprocating slide 223 is provided on the rod body of the reciprocating screw rod 222 for reciprocating transmission, and the reciprocating slide 223 is slidingly limited in a slide chamber opened inside the slide box 22, and the two reciprocating slides 223 are respectively The double-headed piston rod 232 disposed inside the exhaust pipe 23 is fixed at the center position on the left and right sides by connecting rods and sliding seals, and the double-headed piston rod 232 is driven to reciprocate linearly inside the exhaust pipe 23. Both ends of the exhaust pipe 23 are open, and a one-way valve 231 is installed inside the exhaust pipe 23 at the end away from the electrode. A compressed air passage 2321 is axially penetrated at the axial center position inside the double-headed piston rod 232, and a pressure relief valve is installed inside the compressed air passage 2321. The two exhaust pipes 23 are respectively connected at the opposite ends of the one-way valve 231 with a click air pipe 24 and a cleaning air pipe 25. One end of the cleaning air pipe 25 is set to be spherical, and a spherical rotating groove is formed inside the spherical end. The spherical end of the telescopic pipe 253 is rotatably connected with the rotating groove. At least a ring channel allowing the valve body pipe 252 to rotate 90 degrees is formed on the surface of the spherical end of the cleaning air pipe 25 according to the pipe body of the valve body pipe 252. An adjusting motor 251 is connected to the upper surface of the spherical end of the cleaning air pipe 25 through an integrally arranged mounting seat and bolts. The shaft of the adjusting motor 251 is fixedly connected to the spherical end of the valve body pipe 252 through a coupling to drive and adjust the position of the valve body pipe 252. The telescopic pipe 253 is composed of a pipe body and a sphere integrally arranged at one end of the pipe body. An L-shaped valve hole is formed inside the sphere from the output end of the cleaning air pipe 25 to the input end of the pipe body. One end of the pipe body is fixedly communicated and arranged above the side surface of the telescopic pipe 253. The telescopic pipe 253 is composed of a telescopic hose and mounting pipes fixed at both ends of the hose. An elevating electric push rod 254 is fixedly arranged on the upper end surface of the mounting pipe. The output rod of the elevating electric push rod 254 extends into the interior of the telescopic pipe 253 to the lower mounting pipe and is fixed to the cleaning box 255. The lower mounting pipe is fixed at the center position of the upper end surface of the cleaning box 255. An air-pushing air path 2551 is formed inside the cleaning box 255 and extends downward in an S shape from the communicating end with the telescopic pipe 253. The air-pushing air path 2551 is composed of an S-shaped input air duct, a rotating chamber, and air outlet holes communicating the rotating chamber with the outside. An impeller 2552 is rotatably arranged inside the rotating chamber. The lower port of the input air duct is inclinedly formed toward the blades of the impeller 2552. The rotating shaft of the impeller 2552 extends out of the cleaning box 255 and is fixed to the cleaning piece 256 arranged directly below the cleaning box 255. The cleaning piece 256 is composed of a circular plate and a friction piece fixed to the bottom surface of the circular plate. A fence-shaped infiltration pore channel is formed inside the circular plate toward the friction piece. A liquid replenishing bottle 2561 for supplying liquid is fixedly arranged at the output end of the infiltration pore channel. A plurality of strip-shaped grooves and hole grooves are annularly arranged along the axis inside the cleaning piece 256. The hole grooves are distributed between the strip-shaped grooves. Grinding blocks 2562 and magnets 2563 are fixedly connected to the interiors of the strip-shaped grooves and hole grooves respectively. The grinding block 2562 is T-shaped, and the lower surface has grinding lines and is flush with the lower surface of the cleaning piece 256. The height of the magnet 2563 is higher than the lower port of the hole groove.

[0028] During operation, start the spot welder 1. The upper electrode descends. The auxiliary pressure lever 215 pushes the push block 214, driving the double-sided toothed plate 211 to move downward, compressing the spring rod 212. At the same time, it drives the right-side ratchet gear 221, driving the reciprocating lead screw 222 to rotate, causing the reciprocating slide 223 to drive the double-headed piston rod 232 to reciprocate inside the suction pipe 23 to pump air. The gas enters the air-pushing air path 2551 through a series of pipes, blowing the impeller 2552, driving the cleaning piece 256 to rotate, and cooperating with the cleaning liquid and the cutting and grinding block 2562 to process the welding position, improving the welding effect. As the upper electrode continues to descend and approaches the lifting electric push rod 254, the lifting electric push rod 254 lifts the cleaning box 255 to reset, and the position-adjusting motor 251 drives the relevant structure to return to the initial position. Finally, place the parts properly, and the upper electrode continues to descend, pressing against the upper surface of the parts with a specified pressure. At this time, the left-side ratchet gear 221 idles.

[0029] In summary, through the settings of the lifting frame 21, double-sided toothed plate 211, spring rod 212, reset rod 213, push block 214, spring piece 2141, auxiliary pressure lever 215, sliding box 22, ratchet gear 221, reciprocating lead screw 222, reciprocating slide 223, suction pipe 23, one-way valve 231, double-headed piston rod 232, compressed air airway 2321, cleaning air pipe 25, position-adjusting motor 251, valve body pipe 252, telescopic pipe 253, lifting electric push rod 254, cleaning box 255, air-pushing air path 2551, impeller 2552, cleaning piece 256, cutting and grinding block 2562, and magnet 2563, during the downward movement of the electrode under pre-pressure, under the push of the auxiliary pressure lever 215, in cooperation with the push block 214, the double-sided toothed plate 211 can be pushed downward. Then, the downward-moving push block 214 is used to engage and drive the ratchet gear 221, enabling it to coaxially drive the reciprocating lead screw 222 to reciprocally drive the reciprocating slide 223 and the double-headed piston rod 232. During the reciprocating movement, in cooperation with the one-way valve 231 and the pressure relief valve, external gas is pumped in and the pumped-in gas is compressed and output to the inside of the cleaning air pipe 25. Then, the pressurized gas passes through the valve body pipe 252 and the telescopic pipe 253 to the air-pushing air path 2551 to blow the impeller 2552. Thus, under the drive of the rotating impeller 2552 on the cleaning piece 256, in cooperation with the cleaning liquid and the cutting and grinding block 2562, not only can the oil stains, impurities, and oxide layers at the welding position be effectively removed, making the welding surface cleaner, but also the surface of the workpiece can be made smoother, increasing the contact area between automotive parts, enabling the current to be more evenly distributed in the welding area, reducing local overheating and spatter phenomena, increasing the bonding force between metals during welding, reducing welding defects caused by the presence of impurities, significantly improving the welding effect between automotive parts, ensuring the quality and reliability of the welding joint, reducing the rejection rate, and improving the production efficiency and product consistency.

[0030] As an embodiment of the present invention, as Figures 3 to 7As shown, the clicking air pipe 24 has an S-shaped pipeline structure. A T-shaped limiting chute is provided inside it near the lower port. Above the inside of the chute, a return spring 242 is fixedly arranged. The lower end of the return spring 242 is fixed to the clicking rod 241 that is slidably sealed inside the chute, so as to limit and reset the clicking rod 241 inside the chute. The lower end of the clicking rod 241 passes through the clicking air pipe 24, and a hard high-temperature-resistant plastic sphere is rotatably arranged at the passing-out end through a ball seat. Initially, there is a spacing between the clicking rod 241 and the workpiece. An exhaust hole is provided on the pipe side of the clicking air pipe 24 at the position of the chute where the clicking rod 241 is located, and the position of the exhaust hole is set according to the clicking rod 241, the electrode spacing, and the thickness of the workpiece.

[0031] During operation, the upper and lower electrodes pre-press and energize the automotive parts for welding. The push block 214 is docked with the reset rod 213, and the push block 214 is pressed to retract into the double-sided toothed plate 211. The auxiliary moving pressure rod 215 stops pushing down. The double-sided toothed plate 211 quickly moves upward and resets along the lifting frame 21 under the action of the spring rod 212, driving the left-side ratchet gear 221, driving the reciprocating lead screw 222 to make the reciprocating slide block 223 move in a reciprocating straight line. The reciprocating slide block 223 drives the double-headed piston rod 232 to draw air in the air extraction pipe 23 and press air into the clicking air pipe 24. The air presses the clicking rod 241 to move downward. The lower end of the clicking rod 241 hits the rear side of the spot welding position on the surface of the automotive parts, and uses micro-vibration to discharge bubbles and homogenize the molten metal, improving the spot welding quality.

[0032] In summary, through the settings of the lifting frame 21, double-sided toothed plate 211, spring rod 212, reset rod 213, push block 214, spring member 2141, auxiliary moving pressure rod 215, sliding box 22, ratchet gear 221, reciprocating lead screw 222, reciprocating slide block 223, air extraction pipe 23, one-way valve 231, double-headed piston rod 232, air pressure airway 2321, clicking air pipe 24, clicking rod 241, and return spring 242, during the welding process, the movement of the double-sided toothed plate 211 drives the left-side ratchet gear 221 to drive the reciprocating lead screw 222 to move, enabling the double-headed piston rod 232 to press air into the clicking air pipe 24, pushing the lower end of the clicking rod 241 to hit the rear side of the spot welding position on the surface of the automotive parts. This micro-vibration effect can effectively discharge the bubbles between the molten metals, making the molten metals more evenly distributed. By improving the metal fusion state, problems such as looseness and reduced strength of the welding points caused by bubble residues are avoided, enhancing the density and mechanical properties of the spot welding part, improving the overall structural strength and stability of the automotive parts after spot welding, and ensuring the safety and durability of the vehicle during use.

[0033] Working principle: During operation, first place the automotive parts to be spot-welded stably between the upper and lower electrodes of the spot welder 1 with the aid of a fixture. At the same time, ensure that the spot-welding position of the automotive parts is aligned with the electrodes, and the lower surface of the automotive parts contacts the lower electrode at the welding position. Then, the positioning motor 251 will rotate to drive the valve body tube 252, the cleaning box 255 and their connected structures, so that the valve body tube 252, the cleaning box 255 and their connected structures rotate and move to directly above the welding point of the automotive parts. Then, the lifting electric push rod 254 will push the cleaning box 255 and the cleaning piece 256 downward, so that the cleaning piece 256 adheres to the position of the welding point of the automotive parts. Then, start the spot welder 1. The spot welder 1 will push the upper electrode downward. At the same time, the auxiliary pressure rod 215 fixed to the bottom surface of the upper electrode assembly will contact the push block 214, push the push block 214 downward, and synchronously drive the double-sided toothed plate 211 connected to the push block 214 to move linearly downward along the lifting frame 21. During the upward movement of the double-sided toothed plate 211, the spring rod 212 will be compressed. At the same time, the downward-moving double-sided toothed plate 211 will drive the right-side ratchet gear 221 to rotate. The driven right-side ratchet gear 221 will coaxially drive the reciprocating lead screw 222 to rotate. The rotating reciprocating lead screw 222 will drive the reciprocating slider 223 to move linearly back and forth along the sliding box 22. The reciprocatingly moving reciprocating slider 223 will drive the double-headed piston rod 232 to move back and forth along the inner wall of the suction pipe 23. During the movement, air will be sucked into the pipe from the outside. Specifically, when the double-headed piston rod 232 moves forward, inside the suction pipe 23, the space between the rear end of the double-headed piston rod 232 and the one-way valve 231 increases. Since no other substances or gases are introduced into this space, a negative pressure environment will occur, which will force the one-way valve 231 to open and suck external air into the inside of the suction pipe 23. When the double-headed piston rod 232 moves to the right, the gas sucked into the inside of the suction pipe 23 will be squeezed. As the pressure increases, it will force the pressure relief valve provided inside the air compression air passage 2321 of the double-headed piston rod 232 to open. Then, the gas will enter the inside of the cleaning air pipe 25 from the pressure relief valve, and will enter the inside of the air push air path 2551 along the cleaning air pipe 25 through the valve body tube 252 and the telescopic tube 253, and blow on the surface of the blades of the impeller 2552, forcing the impeller 2552 to rotate (the gas is discharged from the air holes). The rotating impeller 2552 will coaxially drive the cleaning piece 256 to rotate. Then, the cleaning piece 256 will cooperate with the specified cleaning liquid to clean the welding position, remove the oxide layer, etc. At the same time, the grinding block 2562 driven by the cleaning piece 256 will cut and polish the spot-welding position during rotation, increasing the flatness of the spot-welding position of the automotive parts and reducing the surface undulation, which can increase the contact area between the automotive parts during spot welding and is more conducive to improving the welding effect between the automotive parts. The magnet 2563 will adsorb the metal chips generated by grinding. As the upper electrode of the spot welder 1 continues to move downward, when the lower end of the electrode approaches the lifting electric push rod 254,The lifting electric push rod 254 will pull the cleaning box 255 upward to lift it back to its original position, and then the positioning motor 251 will rotate the ball end of the driving valve body tube 252, so that it drives the lifting electric push rod 254, the telescopic tube 253, the cleaning box 255 and their connecting structure to rotate and reset to the initial position along the ball end, and then place the automobile parts to be spot welded in the cleaned position, and then the upper electrode of the spot welding machine 1 will continue to move downward and press against the upper surface of the automobile parts to be spot welded with a specified pressure. In this process, the ratchet gear 221 on the left side will rotate on the double-sided tooth plate 211. The push block 214 is driven to idle under the drive of the double-sided toothed plate 211, and will not drive the reciprocating screw rod 222 to rotate. While the upper and lower electrodes are pre-pressing and energizing the two automobile parts for welding, the upper inclined surface of the push block 214 is butted against the lower inclined surface of the reset rod 213, and the push block 214 is pressed to compress the spring member 2141 to retract into the double-sided toothed plate 211. As the push block 214 retracts, the auxiliary pressure rod 215 will not be able to continue to push the push block 214 downward, and then the double-sided toothed plate 211 will quickly move upward and reset along the lifting frame 21 under the action of the spring rod 212, and the double-sided toothed plate 211 will move upward and reset. During the process, the ratchet gear 221 on the left side will be meshed and driven, and the rotating ratchet gear 221 will coaxially drive the reciprocating screw rod 222 to drive the reciprocating slide 223 to reciprocate linearly, and then the reciprocating slide 223 will drive the double-headed piston rod 232 to extract air into the exhaust pipe 23, and pressurize air into the click air pipe 24. The gas entering the click air pipe 24 will press on the upper end of the click rod 241, so that the click rod 241 quickly stretches the reset spring 242 along the wall of the click air pipe 24 and moves downward, and the lower end of the downward moving click rod 241 The electrode tip will hit the surface of the auto parts and is located at the rear side of the spot welding position. After the hit, the gas will be discharged through the pores. This will continue, and the micro-vibration effect transmitted after the continuous hit on the surface of the auto parts will be used to discharge the bubbles between the molten metal and homogenize the molten metal, which is more conducive to improving the quality of spot welding. After the power is turned on for a specified time, the electrode will be turned off and maintained for a period of time to solidify the molten metal. After solidification, the auto parts after spot welding can be removed, and the next group of auto parts or the next point can be spot welded.

[0034] It should be noted that the cleaning sheet 256 can be adaptively modified according to the lower electrode of the spot welding machine 1 and the spot welding position of the automobile parts.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spot welding device, comprising: Spot welder, mainly composed of a transformer, electrodes, a controller and a fuselage; characterized in that: Spot welding auxiliary structure, arranged between the upper and lower electrodes of the spot welder, and fixed on one side of the lower electrode by bolts; Among them, the spot welding auxiliary structure includes a lifting frame. A double-sided toothed plate is slidably arranged above the inside of the lifting frame, and a spring rod is fixedly connected to the lower end of the double-sided toothed plate. A push block is slidably limited by a spring member at the middle upper position on the left side inside the double-sided toothed plate. A secondary driving pressure rod for pushing down the push block is fixedly arranged on the bottom surface of the upper electrode of the spot welder according to the position of the push block. A reset rod is connected by bolts on the surface of the lifting frame directly below the push block. Ratchet gears are meshingly driven below both tooth sides of the double-sided toothed plate, and the axles of the ratchet gears are fixedly connected to reciprocating lead screws rotatably arranged inside the sliding box. A reciprocating sliding seat is reciprocatingly driven on the rod body of the reciprocating lead screw, and the reciprocating sliding seat is slidably limited in a sliding chamber opened inside the sliding box. The two reciprocating sliding seats are respectively fixedly connected to a double-headed piston rod slidingly sealed inside the air extraction pipe at the central positions on the left and right sides through connecting rods. One end of the air extraction pipe is equipped with a one-way valve. An air pressure relief valve is assembled inside the air pressure channel axially penetrating through the central position inside the double-headed piston rod. The two air extraction pipes are respectively integrally connected and communicated with a clicking air pipe and a cleaning air pipe at the opposite ends of the one-way valve; Among them, a clicking rod is slidably sealed and limited inside the clicking air pipe in cooperation with a reset spring near the lower end; The spherical end of the cleaning air pipe is rotatably connected to the spherical end of the telescopic pipe. A positioning motor is fixed on the upper surface of the spherical end of the cleaning air pipe, and the shaft of the positioning motor is fixedly connected to the spherical end of the valve body pipe through a coupling. And one end of the valve body pipe is fixedly connected and communicated with the upper side of the side surface of the telescopic pipe. The lower end of the telescopic pipe is fixed at the center of the upper end surface of the cleaning box. An air-pushing air path is opened downward from the communicating end with the telescopic pipe inside the cleaning box. An impeller is rotatably arranged inside the rotating chamber of the air-pushing air path. The rotating shaft of the impeller extends out of the cleaning box and is fixed to a cleaning piece arranged directly below the cleaning box. A plurality of strip grooves and hole grooves are annularly arranged along the axis inside the cleaning piece, and the hole grooves are distributed between the strip grooves. And grinding blocks and magnets are respectively fixedly connected to the inside of the strip grooves and the hole grooves.

2. The spot welding device according to claim 1, wherein: The lifting frame is a rail structure with a cross-shaped sliding groove inside, and the lower end is fixed on the surface of the mounting block of the lower electrode of the spot welder by bolts, and is arranged away from the electrode according to the volume adaptability of the workpiece. The spring rod is composed of a telescopic rod and a spring sleeved on the telescopic rod, and the lower end of the spring rod is fixed to the baffle below the inside of the lifting frame. The spring member is composed of a sliding rod and a spring sleeved on the sliding rod.

3. The spot welding device according to claim 1, characterized in that: The push block is a T-shaped slider, and the end protruding out of the double-sided toothed plate is provided with an inclined surface that slopes from top to bottom and from front to back.

4. A spot welding device according to claim 1, characterized in that: The angle of the inclined surface of the secondary driving pressure rod is the same as that of the push block, and the upper end of the reset rod is provided with an inclined surface with the same inclination angle as the push block.

5. A spot welding device according to claim 4, characterized in that: The ratchet gears are all composed of a ratchet and a tooth ring sleeved and fixed on the ratchet, and the two ratchets rotate in opposite directions when stressed.

6. The spot welding device according to claim 5, wherein: The lower end of the clicking rod passes through the clicking air pipe, and a hard high-temperature-resistant sphere made of plastic is rotatably arranged at the passing-out end through a ball seat. And initially, there is a spacing between the clicking rod and the workpiece. An exhaust hole is provided in the side surface of the clicking air pipe at the position of the chute where the clicking rod is located, and the position of the exhaust hole is set according to the clicking rod, the electrode spacing, and the thickness of the workpiece.

7. A spot welding device according to claim 1, characterized in that: The cleaning air pipe is provided with an annular channel on the surface of the ball end according to the pipe body of the valve body pipe, which can at least allow the valve body pipe to rotate 90 degrees.

8. The spot welding device according to claim 7, characterized in that: The telescopic pipe is composed of a pipe body and a sphere integrally arranged at one end of the pipe body. Among them, an L-shaped valve hole is provided inside the sphere from the output end of the cleaning air pipe to the input end of the pipe body.

9. A spot welding device according to claim 8, characterized in that: The telescopic pipe is composed of a telescopic hose and mounting pipes fixed at both ends of the hose. Among them, a lifting electric push rod is fixedly arranged on the upper end surface of the mounting pipe, and the output rod of the lifting electric push rod extends into the interior of the telescopic pipe to the lower mounting pipe and is fixed to the cleaning box.

10. A spot welding device according to claim 1, characterized in that: The cleaning piece is composed of a circular plate and a friction piece fixed to the bottom surface of the circular plate. And a fence-shaped infiltration channel is provided inside the circular plate towards the friction piece, and a liquid replenishing bottle for supplying liquid is fixedly arranged at the output end of the infiltration channel. The grinding block is T-shaped, and the lower surface has grinding lines, and the lower surface is flush with the lower surface of the cleaning piece. The height of the magnet is higher than the lower port of the hole groove.

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