Spot welding equipment for automobile part machining

Abstract

The invention relates to the technical field of automobile part machining, and discloses spot welding equipment for automobile part machining, the 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 automobile parts processing, in particular to spot welding equipment for automobile parts processing. 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] Therefore, a spot welding device for processing automobile parts is proposed. Summary of the invention

[0005] The object of the present invention is to provide a spot welding device for processing automobile parts, so as 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 for processing automobile parts, 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 on the upper part 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 and upper position on the left side of the double-sided toothed plate, and an auxiliary pressure rod for pushing the push block downward is fixedly arranged on the bottom surface of the upper electrode of the spot welding machine according to the position of the push block, a reset rod is connected to the surface of the lifting frame by bolts directly below the push block, ratchet gears are meshed and transmitted below both tooth sides of the double-sided toothed plate, and the wheel axles of the ratchet gears are all rotatably arranged inside the slide box. The reciprocating screw is fixed, and a reciprocating slide is arranged on the rod body of the reciprocating screw for reciprocating transmission, and the sliding limit of the reciprocating slide is arranged in a sliding chamber opened inside the slide box, and the two reciprocating slides are respectively fixed at the center positions of the left and right sides through connecting rods and sliding seals to a double-headed piston rod arranged inside the exhaust pipe, one end of the exhaust pipe is equipped with a one-way valve, and an air compression passage is opened axially through the axial position inside the double-headed piston rod, and a pressure relief valve is arranged inside the air compression passage, and the two exhaust pipes are respectively connected at the opposite ends of the one-way valves to form a click air pipe and a cleaning air pipe; Wherein, the interior of the click air pipe cooperates with the return spring to slide and seal near the lower end to define a click rod; The spherical end of the cleaning air pipe is rotatably connected with the spherical end of the telescopic tube, and the cleaning air pipe is fixed with a positioning motor on the upper surface of the spherical end, and the machine shaft of the positioning motor is fixed with the spherical end of the valve body tube in cooperation with the coupling, and one end of the valve body tube is fixedly connected and arranged above the side of the telescopic tube, and the lower end of the telescopic tube is fixed at the center position of the circle of the upper end surface of the cleaning box, and the interior of the cleaning box is provided with an air-push air path extending downward from the connecting end with the telescopic tube, and an impeller is rotatably arranged inside the rotating chamber of the air-push air path, and the rotating shaft of the impeller extends through the cleaning box and is fixed to a cleaning sheet arranged directly below the cleaning box, and the interior of the cleaning sheet is provided with a plurality of strip grooves and hole grooves along the axial annular array, and the hole grooves are distributed between the strip grooves, and the interiors of the strip grooves and the hole grooves are respectively fixedly connected with a cutting and grinding block and a magnet, the cutting and grinding block is T-shaped, and the lower surface has a grinding pattern, and the lower surface is flush with the lower surface of the cleaning sheet, and the height of the magnet is higher than the lower port of the hole groove.

[0007] Preferably, the lifting frame 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 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 at the bottom of the lifting frame, and 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 one end passing through the double-sided tooth plate is provided with an inclined surface inclined from top to bottom and from front to back.

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

[0010] Preferably, the ratchet gears are 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.

[0011] Preferably, the lower end of the click rod passes through the click air pipe, and a hard and high-temperature resistant ball made of plastic is rolledly arranged at the passing end through a ball seat, and initially, there is a distance between the click rod and the workpiece, and a through exhaust hole is opened on the side surface of the click air pipe at the position of the slide groove where the click rod is located, and the position of the exhaust hole is set according to the click rod, the electrode spacing and the thickness of the workpiece.

[0012] Preferably, the surface of the cleaning air pipe at the ball end is provided with a ring channel according to the tube body of the valve body tube, which can allow the valve body tube to rotate by at least 90 degrees.

[0013] Preferably, the telescopic tube is composed of a tube body and a sphere integrally arranged at one end of the tube body, wherein 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 tube body.

[0014] Preferably, the telescopic tube consists of a telescopic hose and mounting tubes fixed at both ends of the hose, wherein a lifting electric push rod is fixedly provided on the upper end surface of the mounting tube, and the output rod of the lifting electric push rod extends into the interior of the telescopic tube to the mounting tube below and is fixed to the cleaning box.

[0015] Preferably, the cleaning sheet is composed of a circular plate and a friction plate fixed on the bottom surface of the circular plate, and a fence-shaped infiltration channel is opened inside the circular plate toward the friction plate, and a liquid replenishing bottle for liquid supply is fixedly provided at the output end of the infiltration channel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can be configured with a lifting frame, a double-sided toothed plate, a spring rod, a reset rod, a push block, a spring part, an auxiliary pressure rod, a slide box, a ratchet gear, a reciprocating screw rod, a reciprocating slide seat, an air extraction pipe, a one-way valve, a double-headed piston rod, an air compression airway, a cleaning airway, a positioning motor, a valve body pipe, a telescopic pipe, a lifting electric push rod, a cleaning box, an air-pushing airway, an impeller, a cleaning sheet, a cutting and grinding block and a magnet. During the process of electrode pre-pressing downward movement, the double-sided toothed plate can be pushed downward by the push block under the push of the auxiliary pressure rod, and then the ratchet gear can be meshed and driven by the downward push block, so that the ratchet gear can be coaxially driven by the reciprocating screw rod to reciprocate the reciprocating slide seat and the double-headed piston rod. In the process of reciprocating movement, the one-way valve and the pressure relief valve can be used to realize the suction of external gas and the compression of the sucked gas. After the gas is retracted, it is outputted to the inside of the cleaning air pipe, and then the pressurized gas will pass through the valve body pipe, the telescopic pipe to the air push air path to blow the impeller. Under the driving of the cleaning sheet by the rotating impeller, in combination with the cleaning liquid and the cutting and grinding block, it can not only effectively remove the oil, impurities and oxide layer at the welding position, which makes the welding surface cleaner, but also makes the surface of the workpiece smoother, increases the contact area between automobile parts, and enables the current to be more evenly distributed in the welding area, reducing local overheating and spattering, increasing the bonding force between metals during welding, and reducing welding defects caused by the presence of impurities. It significantly improves the welding effect between automobile parts, ensures the quality and reliability of the welding joint, reduces the scrap rate, and improves production efficiency and product consistency; 2. The present invention is provided with a lifting frame, a double-sided toothed plate, a spring rod, a reset rod, a push block, a spring part, an auxiliary pressure rod, a slide box, a ratchet gear, a reciprocating screw rod, a reciprocating slide seat, an exhaust pipe, a one-way valve, a double-headed piston rod, a compressed air duct, a click air pipe, a click rod and a reset spring. During the welding process, the movement of the double-sided toothed plate drives the left ratchet gear to drive the reciprocating screw rod to move, so that the double-headed piston rod presses air to the click air pipe, and pushes the lower end of the click rod to hit the rear side of the spot welding position on the surface of the automobile part. This micro-vibration effect can effectively eliminate bubbles between the molten metal and make the molten metal more evenly distributed. By improving the metal fusion state, the problems of loose welding points and reduced strength caused by residual bubbles are avoided, the density and mechanical properties of the spot welding parts are enhanced, the overall structural strength and stability of the automobile parts after spot welding are improved, and the safety and durability of the automobile during use are ensured. 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 welding machine and the auxiliary 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 It is a schematic diagram of the lifting frame and its connection structure of the present invention.

[0021] Figure 5 It is a cross-sectional schematic diagram of the double-sided tooth plate of the present invention.

[0022] Figure 6 It is a cross-sectional view of the slide box, the air extraction pipe, the click air pipe and the cleaning air pipe of the present invention.

[0023] Figure 7 This is a disassembly diagram of the slide box, the air extraction pipe, the click air pipe and the cleaning air pipe of the present invention.

[0024] Figure 8 It is a schematic diagram of the cleaning sheet of the present invention and its connection structure.

[0025] In the figure: 1. Spot welding machine; 2. Spot welding auxiliary structure; 21. Lifting frame; 211. Double-sided tooth plate; 212. Spring rod; 213. Reset rod; 214. Push block; 2141. Spring member; 215. Auxiliary pressure rod; 22, slide box; 221, ratchet gear; 222, reciprocating screw rod; 223, reciprocating slide seat; 23, air extraction pipe; 231, one-way valve; 232, double-ended piston rod; 2321, compressed air channel; 24. Click air pipe; 241. Click rod; 242. Return spring; 25. Cleaning air pipe; 251. Positioning motor; 252. Valve body tube; 253. Telescopic tube; 254. Lifting electric push rod; 255. Cleaning box; 2551. Air push air circuit; 2552. Impeller; 256. Cleaning sheet; 2561. Fluid replenishing bottle; 2562. Cutting and grinding block; 2563. Magnet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figures 1 to 8 The present invention provides a technical solution for spot welding equipment for automobile parts processing: A spot welding device for processing automobile parts, comprising: The spot welding machine 1 is mainly composed of a transformer, an electrode, a controller and a body; 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. Among them, one end of the cleaning air pipe 25 is set to be spherical, and a spherical rotation groove is opened inside the ball end, and the rotation groove is rotatably connected with the ball end of the telescopic tube 253. The surface of the ball end of the cleaning air pipe 25 is provided with a ring channel that allows the valve body tube 252 to rotate at least 90 degrees according to the tube body of the valve body tube 252, and the cleaning air pipe 25 is connected with a positioning motor 251 on the upper surface of the ball end in cooperation with an integrally arranged mounting seat and bolts, and the machine shaft of the positioning motor 251 is fixed with the ball end of the valve body tube 252 by a coupling to drive the valve body tube 252 to adjust the position, and the telescopic tube 253 is connected with the ball end of the valve body tube 252 to drive the valve body tube 252 to adjust the position. 53 is composed of a tube body and a sphere integrally arranged at one end of the tube body, wherein an L-shaped valve hole is opened inside the sphere from the output end of the cleaning air pipe 25 to the input end of the tube body, and one end of the tube body is fixedly connected and arranged above the side of the telescopic tube 253, and the telescopic tube 253 is composed of a telescopic hose and a mounting tube fixed at both ends of the hose, wherein a lifting electric push rod 254 is fixedly arranged on the upper end surface of the mounting tube, and the output rod of the lifting electric push rod 254 extends into the interior of the telescopic tube 253 to the mounting tube below and is fixed to the cleaning box 255, and the mounting tube below is fixed to the cleaning box 25 5, the interior of the cleaning box 255 is provided with an air-pushing air path 2551 extending downward in an S-shape from the end communicating with the telescopic tube 253, and the air-pushing air path 2551 is composed of an S-shaped input air passage, a rotating chamber, and an air outlet connecting the rotating chamber with the outside, wherein an impeller 2552 is rotatably arranged inside the rotating chamber, and the lower end of the input air passage is inclined toward the blades of the impeller 2552, and the rotating shaft of the impeller 2552 extends out of the cleaning box 255 and is fixed to a cleaning sheet 256 arranged just below the cleaning box 255, and the cleaning sheet 256 is composed of a circular plate and a friction plate fixed on the bottom surface of the circular plate. The cleaning plate 256 is composed of a plate, and a fence-shaped infiltration channel is opened inside the circular plate toward the friction plate, and a fluid replenishing bottle 2561 for fluid supply is fixedly arranged at the output end of the infiltration channel, a plurality of strip grooves and hole grooves are opened inside the cleaning plate 256 along the axial ring array, and the hole grooves are distributed between the strip grooves, and the insides of the strip grooves and the hole grooves are respectively fixedly connected with a cutting and grinding block 2562 and a magnet 2563, the cutting and grinding block 2562 is T-shaped, and the lower surface has a grinding texture, and the lower surface is flush with the lower surface of the cleaning plate 256, and the height of the magnet 2563 is higher than the lower end of the hole groove.

[0028] When working, the spot welding machine 1 is started, the upper electrode descends, the auxiliary pressure rod 215 pushes the push block 214, drives the double-sided tooth plate 211 to move downward, compresses the spring rod 212, and drives the right ratchet gear 221 at the same time, drives the reciprocating screw rod 222 to rotate, and makes the reciprocating slide 223 drive the double-headed piston rod 232 to move back and forth in the exhaust pipe 23 to exhaust air. The gas enters the gas push gas path 2551 through a series of pipelines, blows the impeller 2552, drives the cleaning sheet 256 to rotate, cooperates with the cleaning liquid and the cutting and grinding block 2562 to process the welding position, and improves the welding effect. As the upper electrode continues to move downward and approaches the lifting electric push rod 254, the lifting electric push rod 254 pulls the cleaning box 255 to reset, and the positioning motor 251 drives the relevant structure to return to the initial position. Finally, the parts are placed, and the upper electrode continues to move downward, pressing against the upper surface of the parts with a specified pressure. At this time, the left ratchet gear 221 is idle.

[0029] In summary, through the lifting frame 21, the double-sided tooth plate 211, the spring rod 212, the reset rod 213, the push block 214, the spring member 2141, the auxiliary pressure rod 215, the slide box 22, the ratchet gear 221, the reciprocating screw rod 222, the reciprocating slide seat 223, the exhaust pipe 23, the one-way valve 231, the double-headed piston rod 232, the compressed air channel 2321, the cleaning air pipe 25, the positioning motor 251, the valve body tube 252, the telescopic tube 253, the lifting electric push rod 254, the cleaning The arrangement of the box 255, the air push air path 2551, the impeller 2552, the cleaning sheet 256, the cutting and grinding block 2562 and the magnet 2563 can be used to push the double-sided toothed plate 211 downward under the push of the auxiliary pressure rod 215 during the electrode pre-pressing downward movement, and then the downward push block 214 is used to mesh the ratchet gear 221, so that the reciprocating screw rod 222 coaxially drives the reciprocating slide 223 and the double-headed piston rod 232 to reciprocate. , and in the process of reciprocating movement, the one-way valve 231 and the pressure relief valve are cooperated to realize the suction of external gas and the output of the sucked gas to the inside of the cleaning air pipe 25 after compression, and then the pressurized gas will pass through the valve body tube 252 and the telescopic tube 253 to the air push air path 2551 to blow the impeller 2552, so that under the driving of the cleaning sheet 256 by the rotating impeller 2552, in conjunction with the cleaning liquid and the cutting and grinding block 2562, not only can the oil, impurities and oxide layer at the welding position be effectively removed, which makes the welding surface cleaner, but also can make the surface of the workpiece smoother, increase the contact area between automobile parts, make the current more evenly distributed in the welding area, reduce local overheating and splashing, increase the bonding force between metals during welding, reduce welding defects caused by the presence of impurities, significantly improve the welding effect between automobile parts, ensure the quality and reliability of welding joints, reduce the scrap rate, and improve production efficiency and product consistency.

[0030] As an embodiment of the present invention, Figures 3 to 7As shown, the click air pipe 24 is an S-shaped pipeline structure, and a T-shaped limiting groove is opened inside it near the lower port, and a reset spring 242 is fixedly arranged on the upper part of the inside of the groove, and the lower end of the reset spring 242 is fixed to the click rod 241 which is slidingly sealed and arranged inside the groove, so as to limit and reset the click rod 241 inside the groove, and the lower end of the click rod 241 passes through the click air pipe 24, and a hard and high-temperature resistant ball made of plastic is rolled at the passing end through the ball seat, and initially, there is a distance between the click rod 241 and the workpiece, and a through exhaust hole is opened on the side surface of the click air pipe 24 at the position of the groove where the click rod 241 is located, and the position of the exhaust hole is set according to the click rod 241, the electrode spacing and the thickness of the workpiece.

[0031] During operation, the upper and lower electrodes pre-press and energize the automobile parts for welding, the push block 214 docks with the reset rod 213, and the push block 214 is forced to retract into the double-sided toothed plate 211, and the auxiliary pressure rod 215 stops pushing down. The double-sided toothed plate 211 is quickly moved up and reset along the lifting frame 21 under the action of the spring rod 212, driving the left ratchet gear 221, driving the reciprocating screw rod 222 to make the reciprocating slide 223 reciprocate linearly, and the reciprocating slide 223 drives the double-headed piston rod 232 to exhaust air in the exhaust pipe 23 and press air to the click air pipe 24, and the gas compresses the click rod 241 to move downward, and the lower end of the click rod 241 hits the rear side of the spot welding position on the surface of the automobile parts, and uses micro-vibration to discharge bubbles and homogenize the molten metal, thereby improving the spot welding quality.

[0032] In summary, through the arrangement of the lifting frame 21, the double-sided toothed plate 211, the spring rod 212, the reset rod 213, the push block 214, the spring member 2141, the auxiliary pressure rod 215, the slide box 22, the ratchet gear 221, the reciprocating screw rod 222, the reciprocating slide seat 223, the exhaust pipe 23, the one-way valve 231, the double-headed piston rod 232, the compressed air channel 2321, the click air pipe 24, the click rod 241 and the reset spring 242, during the welding process, the movement of the double-sided toothed plate 211 drives the left ratchet gear 221 to drive the reciprocating screw rod 222 The double-headed piston rod 232 presses air toward the click air pipe 24, pushing the lower end of the click rod 241 to hit the rear side of the spot welding position on the surface of the automobile part. This micro-vibration can effectively eliminate the bubbles between the molten metals, making the molten metal more evenly distributed. By improving the metal fusion state, the problems of loose welding points and reduced strength caused by residual bubbles are avoided, the density and mechanical properties of the spot welding parts are enhanced, the overall structural strength and stability of the automobile parts after spot welding are improved, and the safety and durability of the automobile during use are ensured.

[0033] Working principle: When working, first place the automobile parts to be spot welded with the fixture stably between the upper and lower electrodes of the spot welding machine 1. At the same time, it is necessary to ensure that the spot welding position of the automobile parts is opposite to the electrode setting, and make the lower surface of the automobile parts contact the lower electrode at the welding position, then the positioning motor 251 will rotate and drive the valve body tube 252, the cleaning box 255 and the connected structure, so that the valve body tube 252, the cleaning box 255 and the connected structure rotate and move to the top of the welding point of the automobile parts, then the lifting electric push rod 254 will push the cleaning box 255 and the cleaning sheet 256 downward, so that the cleaning sheet 256 is attached to the position of the welding point of the automobile parts, and then start the spot welding machine 1, the spot welding machine 1 will push the upper electrode down, and at the same time, it is fixed at the bottom of the upper electrode assembly. The auxiliary pressure rod 215 on the surface 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, and the double-sided toothed plate 211 will compress the spring rod 212 during the upward movement. At the same time, the downwardly moved double-sided toothed plate 211 will drive the ratchet gear 221 on the right side to rotate, and the driven ratchet gear 221 on the right side will coaxially drive the reciprocating screw rod 222 to rotate, and the rotating reciprocating screw rod 222 will drive the reciprocating slide 223 to move reciprocatingly along the slide box 22. The reciprocating reciprocating slide 223 will drive the double-headed piston rod 232 to move reciprocatingly along the wall of the exhaust pipe 23, and during the movement, air is extracted from the outside to the inside of the pipe. When the double-headed piston rod 232 moves forward, the space between the rear end of the double-headed piston rod 232 and the one-way valve 231 inside the exhaust pipe 23 increases. Since no other substances or gas are introduced into the space to supplement, a negative pressure environment will appear, which will force the one-way valve 231 to open and draw external air into the exhaust pipe 23. When the double-headed piston rod 232 moves to the right, the gas drawn into the exhaust pipe 23 will be squeezed. As the pressure increases, the pressure relief valve provided in the compressed air channel 2321 of the double-headed piston rod 232 will be forced to open. Then the gas will enter the interior of the cleaning air pipe 25 through the pressure relief valve, and enter the interior of the air push air path 2551 along the cleaning air pipe 25 through the valve body pipe 252 and the telescopic pipe 253, and blow on the impeller 25 The blade surface of 52 forces the impeller 2552 to rotate (the gas is discharged from the pores), and the rotating impeller 2552 will coaxially drive the cleaning sheet 256 to rotate, and then the cleaning sheet 256 will cooperate with the specified cleaning liquid to clean the welding position, remove the oxide layer, etc. At the same time, the cutting and grinding block 2562 driven by the cleaning sheet 256 will cut and grind the spot welding position during the rotation process, increase the flatness of the spot welding position of the automobile parts, reduce the surface undulations, and increase the contact area between the automobile parts during spot welding, which is more conducive to improving the welding effect between the automobile parts, and the magnet 2563 will absorb the metal debris generated by grinding. As the upper electrode of the spot welding machine 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 for automobile parts processing, comprising: The spot welding machine (1) is mainly composed of a transformer, an electrode, a controller and a machine body; and is characterized in that: A 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 means of bolts; The spot welding auxiliary structure (2) comprises a lifting frame (21), a double-sided toothed plate (211) is slidably arranged at the upper part of the lifting frame (21), and a spring rod (212) is fixedly connected to the lower end of the double-sided toothed plate (211), a push block (214) is slidably arranged at the middle upper position on the left side of the double-sided toothed plate (211) through a spring member (2141), an auxiliary pressure rod (215) is fixedly arranged on the bottom surface of the upper electrode of the spot welding machine (1) according to the position of the push block (214) for pushing the push block (214) downward, a reset rod (213) is bolted to the surface of the lifting frame (21) directly below the push block (214), ratchet gears (221) are meshed and arranged below both tooth sides of the double-sided toothed plate (211), and the wheel axles of the ratchet gears (221) are rotatably arranged on the slide box ( 22) The reciprocating screw rod (222) inside is fixed, and a reciprocating slide seat (223) is arranged on the rod body of the reciprocating screw rod (222) for reciprocating transmission, and the reciprocating slide seat (223) is slidingly limited and arranged in a slide chamber opened inside the slide box (22), and the two reciprocating slide seats (223) are fixed to a double-headed piston rod (232) arranged inside the exhaust pipe (23) at the center position of the left and right sides respectively through a connecting rod and a sliding seal, and one end of the exhaust pipe (23) is equipped with a one-way valve (231), and 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 arranged inside the compressed air passage (2321), and the two exhaust pipes (23) are respectively connected at the opposite ends of the one-way valve (231) and are integrally connected with a click air pipe (24) and a cleaning air pipe (25); The click air pipe (24) is internally matched with a return spring (242) and is slidably sealed at a position near the lower end to define a click rod (241); The ball end of the cleaning air pipe (25) is rotatably connected to the ball end of the telescopic tube (253); a positioning motor (251) is fixed on the upper surface of the ball end of the cleaning air pipe (25); the shaft of the positioning motor (251) is fixed to the ball end of the valve body tube (252) through a coupling; one end of the valve body tube (252) is fixedly connected and arranged above the side of the telescopic tube (253); the lower end of the telescopic tube (253) is fixed to the center of the upper end surface of the cleaning box (255); the interior of the cleaning box (255) is connected to the telescopic tube (253) An air-push air path (2551) is extended downward from the connecting end, an impeller (2552) is rotatably arranged inside the rotating chamber of the air-push air path (2551), a rotating shaft of the impeller (2552) extends through the cleaning box (255) and is fixed to a cleaning sheet (256) arranged directly below the cleaning box (255), a plurality of strip grooves and hole grooves are arranged in an axial annular array inside the cleaning sheet (256), and the hole grooves are distributed between the strip grooves, and a cutting and grinding block (2562) and a magnet (2563) are fixedly connected to the inside of the strip grooves and the hole grooves, respectively.

2. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The lifting frame (21) 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 arranged away from the electrode according to the volume adaptability of the workpiece. The spring rod (212) 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 bottom of the lifting frame (21), and the spring member (2141) is composed of a slide rod and a spring sleeved on the slide rod.

3. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The push block (214) is a T-shaped slide block, and one end of the push block that passes through the double-sided tooth plate (211) is provided with an inclined surface that is inclined from top to bottom and from front to back.

4. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The angle of the inclined surface of the auxiliary pressure rod (215) is the same as that of the push block (214), and the upper end of the reset rod (213) is arranged as an inclined surface with the same inclination angle as that of the push block (214).

5. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The ratchet gears (221) are 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.

6. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The lower end of the click rod (241) passes through the click air pipe (24), and a hard, high-temperature-resistant ball made of plastic is rolled and arranged at the passing end through a ball seat, and initially, there is a distance between the click rod (241) and the workpiece, and a through exhaust hole is opened on the side surface of the click air pipe (24) at the position of the slide groove where the click rod (241) is located, and the position of the exhaust hole is set according to the click rod (241), the electrode distance and the thickness of the workpiece.

7. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The surface of the cleaning air pipe (25) at the ball end is provided with a ring channel according to the tube body of the valve body tube (252) that allows the valve body tube (252) to rotate at least 90 degrees.

8. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The telescopic tube (253) is composed of a tube body and a sphere integrally arranged at one end of the tube body, wherein an L-shaped valve hole is provided inside the sphere from the output end of the cleaning air pipe (25) to the input end of the tube body.

9. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The telescopic tube (253) is composed of a telescopic hose and mounting tubes fixed at both ends of the hose, wherein a lifting electric push rod (254) is fixedly provided on the upper end surface of the mounting tube, and an output rod of the lifting electric push rod (254) extends through the interior of the telescopic tube (253) to the mounting tube below and is fixed to the cleaning box (255).

10. The spot welding equipment for automobile parts processing according to claim 1, characterized in that: The cleaning sheet (256) is composed of a circular plate and a friction plate fixed on the bottom surface of the circular plate, and a fence-shaped infiltration channel is opened inside the circular plate toward the friction plate, and a liquid replenishing bottle (2561) for supplying liquid is fixedly arranged at the output end of the infiltration channel. The cutting and grinding block (2562) is T-shaped, and has a grinding pattern on the lower surface, and the lower surface is flush with the lower surface of the cleaning sheet (256), and the height of the magnet (2563) is higher than the lower end of the hole slot.

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