Spot welding apparatus

Abstract

The present application relates to a spot welding equipment, mainly by spot welding machine and spot welding auxiliary structure, spot welding machine contains transformer, electrode, controller and conventional components such as body, spot welding auxiliary structure is placed between upper and lower electrodes of spot welding machine and is fixed to one side of lower electrode, its core components include lifting frame, double-sided toothed plate, spring rod, push block, auxiliary driving pressure rod, reset rod, sliding box, ratchet gear, reciprocating screw rod, reciprocating sliding seat, air extraction pipe, click air pipe, cleaning air pipe, telescopic pipe, cleaning box, impeller, cleaning piece and the like, the present application is provided through the setting of spot welding auxiliary structure, the quality and efficiency of automobile parts spot welding are significantly improved, and the present application has important promoting effect on automobile manufacturing industry parts processing link, has obvious advantage in guaranteeing product quality and improving production benefit, and provides reliable equipment solution for automobile parts 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 due to 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 requirements of large-scale automobile production.

[0003] When spot welding automotive parts with current spot welding machines, the workpiece surface is not an absolutely smooth plane, so there will be bumps and depressions. 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, and gas cavities may sometimes exist between the molten metals. In this case, the stability of the workpieces after spot welding is greatly 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 as mentioned in the background art.

[0006] To achieve the above object, the present invention provides the following technical solution: a spot welding device comprising:

[0007] Spot welding machine, mainly composed of transformer, electrode, controller and machine body;

[0008] 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;

[0009] Among them, the spot welding auxiliary structure includes a lifting frame, a double-sided toothed plate is slidingly provided on the upper part of the lifting frame, and the lower end of the double-sided toothed plate is fixedly connected to a spring rod, and a push block is slidingly limited by a spring member at the middle upper position on the left side of the double-sided toothed plate. The bottom surface of the upper electrode of the spot welding machine is fixedly provided with an auxiliary pressure rod for pushing the push block downward according to the position of the push block, and a reset rod is connected to the surface of the lifting frame by a bolt just below the push block, and ratchet gears are meshed and driven below both tooth sides of the double-sided toothed plate, and the wheel axles of the ratchet gears are all rotated with the gears arranged inside the slide box. The reciprocating screw is fixed, and a reciprocating slide is provided on the rod body of the reciprocating screw for reciprocating transmission, and the reciprocating slide is limitedly provided 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 a connecting rod and a sliding seal on 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 axially penetrated at the axial center position inside the double-headed piston rod, and a pressure relief valve is provided inside the air compression passage, and the two exhaust pipes are respectively connected to a click air pipe and a cleaning air pipe at the opposite ends of the one-way valve.

[0010] 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;

[0011] The top end of the piston rod of the piston rod is connected with the piston rod of the piston rod and the piston rod of the piston rod is connected with the piston rod of the piston rod. The piston rod of the piston rod is connected with the piston rod of the piston rod.

[0012] 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. The spring member is composed of a slide rod and a spring sleeved on the slide rod.

[0013] 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.

[0014] 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 set to be an inclined surface with the same inclination angle as that of the push block.

[0015] Preferably, the ratchet gears are composed of a ratchet wheel and a toothed ring fixed on the ratchet wheel, and the two ratchet wheels are rotated in opposite directions when subjected to force.

[0016] Preferably, the lower end of the click rod passes through the click air pipe, and a hard, high-temperature resistant ball made of plastic is rolled on the ball seat at the passing end, and initially, there is a distance between the click rod and the workpiece, and a through exhaust hole is opened on the side 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.

[0017] 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 at least ninety degrees.

[0018] Preferably, the telescopic tube is composed of a tube body and a sphere integrally provided 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.

[0019] 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.

[0020] 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 fluid replenishing bottle for fluid supply is fixed at the output end of the infiltration channel.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. 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, an air pressure airway, a cleaning airway, a position adjustment motor, a valve body tube, a telescopic tube, 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 auxiliary pressure rod can cooperate with the push block to push the double-sided toothed plate downward, and then the downward push block is used to engage the ratchet gear, so that the ratchet gear is coaxially driven by the reciprocating screw rod to drive the reciprocating slide seat and the double-headed piston rod back and forth. In the process of reciprocating movement, the one-way valve and the pressure relief valve are cooperated to realize the suction of external gas and the compression of the sucked gas. After the air is retracted, the output inside the cleaning air pipe is cleaned, and then the pressurized gas will pass through the valve body tube and the telescopic tube to the air push air path to blow the impeller. Under the driving force of the cleaning piece by the rotating impeller, combined with the cleaning fluid 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 workpiece surface smoother, increases the contact area between automobile parts, and makes the current 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 welded joints, reduces the scrap rate, and improves production efficiency and product consistency.

[0023] 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, a reciprocating slide seat, an exhaust pipe, a one-way valve, a double-headed piston rod, a compressed air duct, a click air duct, 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 to move, so that the double-headed piston rod presses air into the click air duct, pushing 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, it avoids the problems of loose welding points and reduced strength caused by residual bubbles, enhances the density and mechanical properties of the spot welding parts, improves the overall structural strength and stability of the automobile parts after spot welding, and ensures the safety and durability of the automobile during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural view of the present invention.

[0025] Figure 2 It is a schematic diagram of the spot welding machine and the auxiliary pressure rod of the present invention.

[0026] Figure 3 It is a schematic diagram of the spot welding auxiliary structure of the present invention.

[0027] Figure 4 It is a schematic diagram of the lifting frame and its connection structure of the present invention.

[0028] Figure 5 It is a cross-sectional schematic diagram of the double-sided tooth plate of the present invention.

[0029] 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.

[0030] Figure 7 This is a disassembly diagram of the slide box, air extraction pipe, click air pipe and cleaning air pipe of the present invention.

[0031] Figure 8 Schematic diagram of the cleaning sheet and its connection structure of the present invention.

[0032] In the picture:

[0033] 1. Spot welding machine;

[0034] 2. Spot welding auxiliary structure;

[0035] 21. Lifting frame; 211. Double-sided tooth plate; 212. Spring rod; 213. Reset rod; 214. Push block; 2141. Spring member; 215. Auxiliary pressure rod;

[0036] 22. Slide box; 221. Ratchet gear; 222. Reciprocating screw; 223. Reciprocating slide;

[0037] 23. Exhaust pipe; 231. One-way valve; 232. Double-ended piston rod; 2321. Compressed air duct;

[0038] 24. Click air pipe; 241. Click rod; 242. Return spring;

[0039] 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 line; 2552. Impeller; 256. Cleaning sheet; 2561. Fluid replenishing bottle; 2562. Cutting and grinding block; 2563. Magnet. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] See also Figures 1 to 8 , the present invention provides a technical solution for spot welding equipment:

[0042] A spot welding device comprising:

[0043] The spot welding machine 1 is mainly composed of a transformer, an electrode, a controller and a body;

[0044] 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;

[0045] 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 tooth plate 211 is slidingly set on the upper part of the lifting frame 21, and the lower end of the double-sided tooth 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 bottom of the lifting frame 21, and a T-shaped slide groove is opened in the upper middle position on the left side of the double-sided tooth plate 211, and The interior 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 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 just 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 tooth plate 211. The lower part of the two tooth sides of the double-sided tooth plate 211 is meshed with a ratchet gear 221, and the wheel axles of the ratchet gear 221 are fixed to the reciprocating screw rod 222 that is rotatably set inside the slide box 22. The ratchet gear 221 is composed of a ratchet wheel and a toothed ring fixed on the ratchet wheel, and the two ratchet wheels are forced to 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. The two reciprocating slides 223 are respectively The double-headed piston rod 232 is fixed at the center position of the left and right sides by a connecting rod and a sliding seal inside the exhaust pipe 23, and the double-headed piston rod 232 is driven to and fro in 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 channel 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 channel 2321. The two exhaust pipes 23 are connected to the opposite ends of the one-way valve 231, respectively, with a click air pipe 24 and a cleaning air pipe 25.

[0046] 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 to 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 ninety degrees according to the tube body of the valve body tube 252, and the cleaning air pipe 25 is connected to the upper surface of the ball end with an integral mounting seat and bolts with a positioning motor 251, and the shaft of the positioning motor 251 is fixed with the coupling and the ball end of the valve body tube 252 to drive the valve body tube 252 to adjust the position, and the telescopic tube 253 is connected to the telescopic tube 253. 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. 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. The mounting tube below is fixed to the cleaning box 25 5. At the center of the circle on the upper end face, the interior of the cleaning box 255 is provided with an air-pushing air path 2551 extending downward in an S-shape from the communicating end with the telescopic tube 253. The air-pushing air path 2551 is composed of an S-shaped input air channel, a rotating chamber, and an air outlet connecting the rotating chamber with the outside world. An impeller 2552 is provided for rotation inside the rotating chamber. The lower end of the input air channel is inclined 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 a cleaning piece 256 provided just below the cleaning box 255. The cleaning piece 256 is composed of a circular plate and a friction member fixed to the bottom surface of the circular plate. The cleaning plate 256 is composed of a plurality of plates, and a fence-shaped infiltration channel is provided inside the circular plate toward the friction plate, and a fluid replenishing bottle 2561 for fluid supply is fixedly provided at the output end of the infiltration channel. The interior of the cleaning plate 256 is provided with a plurality of strip grooves and hole grooves along the axial ring 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 2562 and a magnet 2563. The cutting and grinding block 2562 is T-shaped, and the lower surface has a grinding pattern, 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.

[0047] During operation, 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 toothed 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. The gas enters the gas push air path 2551 through a series of pipes, blows the impeller 2552, drives the cleaning piece 256 to rotate, cooperates with the cleaning liquid and the cutting and grinding block 2562 to process the welding position and improve the welding effect. As the upper electrode continues to move downward, when it 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, the upper electrode continues to move downward, and is pressed against the upper surface of the parts with a specified pressure. At this time, the left ratchet gear 221 is idling.

[0048] In summary, through the lifting frame 21, double-sided gear plate 211, spring rod 212, reset rod 213, push block 214, spring member 2141, auxiliary pressure rod 215, slide box 22, ratchet gear 221, reciprocating screw rod 222, reciprocating slide seat 223, exhaust pipe 23, one-way valve 231, double-headed piston rod 232, compressed air channel 2321, cleaning air pipe 25, position adjustment motor 251, valve body tube 252, telescopic tube 253, lifting electric push rod 254, 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 push block 214 is used to mesh the ratchet gear 221, so that it coaxially drives the reciprocating screw 222 to reciprocate the reciprocating slide 223 and the double-headed piston rod 232. , 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. Under the driving force of the cleaning sheet 256 by the rotating impeller 2552, in combination 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 the workpiece surface can be smoother, the contact area between automobile parts is increased, and the current can be more evenly distributed in the welding area, reducing local overheating and spattering, increasing the bonding strength between metals during welding, reducing welding defects caused by the presence of impurities, significantly improving the welding effect between automobile parts, ensuring the quality and reliability of the welding joint, reducing the scrap rate, and improving production efficiency and product consistency.

[0049] 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 return spring 242 is fixedly arranged above the inside of the groove, and the lower end of the return spring 242 is fixed to the click rod 241 with a sliding seal set 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 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.

[0050] 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 tooth plate 211. The auxiliary pressure rod 215 stops pushing down, and the double-sided tooth 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 pressurize air to the click air pipe 24. 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 part, using micro-vibration to expel bubbles, homogenize the molten metal, and improve the spot welding quality.

[0051] 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 movement causes the double-headed piston rod 232 to pressurize 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 effect can effectively eliminate bubbles between the molten metal, making the molten metal distribution more even. By improving the metal fusion state, it avoids problems such as loose welding points and reduced strength caused by residual bubbles, enhances the density and mechanical properties of the spot welding part, improves the overall structural strength and stability of the automobile part after spot welding, and ensures the safety and durability of the automobile during use.

[0052] Working principle: When working, first place the automobile parts that need to be spot welded with the clamp 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 the lower surface of the automobile parts is in contact with 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 to rotate and move the valve body tube 252, the cleaning box 255 and the connected structure 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. Then start the spot welding machine 1, the spot welding machine 1 will push the upper electrode down, and at the same time, it will be fixed at the bottom of the upper electrode assembly. The auxiliary pressure rod 215 on the surface will contact the push block 214, pushing the push block 214 downward, and thereby synchronously driving 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 downward-moving 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 back and forth linearly along the slide box 22, and the reciprocating reciprocating slide 223 will drive the double-headed piston rod 232 to move back and forth 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 this space to supplement, a negative pressure environment will appear, which will then 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 path 2551 along the cleaning air pipe 25 through the valve body tube 252 and the telescopic tube 253, and be blown onto the impeller 25 The blade surface of 52 forces the impeller 2552 to rotate (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 automotive parts, reduce the surface undulations, increase the contact area between the automotive parts during spot welding, and be more conducive to improving the welding effect between the automotive 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 gear plate 211. The double-sided toothed plate 211 is moved upwards and resets as the push block 214 is pressed downwards. During the process, the ratchet gear 221 on the left side will be engaged and driven, and the rotating ratchet gear 221 will coaxially drive the reciprocating screw rod 222 to drive the reciprocating slide 223 back and forth 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 inside of the click air pipe 24. The gas entering the click air pipe 24 will press on the upper end of the click rod 241, causing the click rod 241 to quickly stretch the reset spring 242 along the wall of the click air pipe 24 and move downward, and the lower end of the downward moving click rod 241 The electrode tip will strike the surface of the auto part, located behind the spot welding position. After the strike, the gas will be discharged through the pores. This process is continuously performed, and the micro-vibration effect transmitted after the continuous strike on the surface of the auto part is used to discharge 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 on for a specified time, the power will be turned off to the electrode and maintained for a period of time to allow the molten metal to solidify. After solidification, the auto part can be removed after spot welding, and the next group of auto parts or the next point can be spot welded.

[0053] 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.

[0054] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A spot welding device comprising: The spot welding machine consists of a transformer, an electrode, a controller and a machine body; its characteristics are: 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 tooth plate is slidingly set on the upper part of the lifting frame, and the lower end of the double-sided tooth plate is fixedly connected to a spring rod, and a push block is set at the upper middle position of the left side of the double-sided tooth plate through the sliding limit of a spring part. The bottom surface of the upper electrode of the spot welding machine is fixedly provided with an auxiliary pressure rod for pushing the push block downward according to the position of the push block, and the surface of the lifting frame is connected to a reset rod by a bolt just below the push block, and ratchet gears are meshed and driven below both tooth sides of the double-sided tooth plate, and the wheel axles of the ratchet gears are all connected with the rotating shaft arranged inside the slide box. The reciprocating screw rod is fixed, and a reciprocating slide is provided on the rod body of the reciprocating screw rod for reciprocating transmission, and the sliding limit of the reciprocating slide is set in a slide 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 a connecting rod and a sliding seal on a double-headed piston rod set 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 axis center position inside the double-headed piston rod, and a pressure relief valve is installed inside the air compression passage, and the two exhaust pipes are respectively connected to a click air pipe and a cleaning air pipe at the opposite ends of the one-way valve. 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 ball end of the cleaning air pipe is rotatably connected to the ball end of the telescopic tube, and a positioning motor is fixed on the upper surface of the ball end of the cleaning air pipe, and the shaft of the positioning motor is fixed to the ball end of the valve body tube with a 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 face of the cleaning box, and the interior of the cleaning box is provided with an air-pushing 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-pushing air path, and the rotating shaft of the impeller extends out of the cleaning box and is fixed to a cleaning piece arranged just below the cleaning box, and the interior of the cleaning piece is provided with several strip grooves and hole grooves along the axial ring 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 cutting and grinding blocks and magnets.

2. A spot welding device according to claim 1, characterized in that: 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 set 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. The spring part is composed of a slide rod and a spring sleeved on the slide rod.

3. A spot welding device according to claim 1, characterized in that: The push block is a T-shaped sliding block, and one end of the push block passing through the double-sided tooth plate is provided with an inclined surface inclined 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 auxiliary pressure rod is the same as that of the push block, and the upper end of the reset rod is set to be an inclined surface with the same inclination angle as that of the push block.

5. A spot welding device according to claim 4, characterized in that: The ratchet gears are composed of a ratchet wheel and a toothed ring fixed on the ratchet wheel, and the two ratchet wheels rotate in opposite directions when subjected to force.

6. A spot welding device according to claim 5, characterized in that: The lower end of the click rod passes through the click air pipe, and a hard, high-temperature resistant ball made of plastic is rolled on the ball seat at the passing end. Initially, there is a distance between the click rod and the workpiece, and a through exhaust hole is opened on the side 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.

7. The spot welding equipment according to claim 1, characterized in that: The surface of the cleaning air pipe at the ball end is provided with a ring channel according to the pipe body of the valve body pipe, which can at least allow the valve body pipe to rotate ninety degrees.

8. A spot welding device according to claim 7, characterized in that: 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 opened inside the sphere from the output end of the cleaning air pipe to the input end of the tube body.

9. The spot welding device according to claim 8, characterized in that: 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.

10. The spot welding equipment according to claim 1, characterized in that: The cleaning sheet consists of a circular plate and a friction plate fixed on the bottom of the circular plate. A fence-shaped infiltration channel is opened inside the circular plate towards the friction plate, and a liquid replenishing bottle for liquid supply is fixed at the output end of the infiltration channel. The cutting and grinding block is T-shaped, and the lower surface has a polished texture. The lower surface is flush with the lower surface of the cleaning sheet, and the height of the magnet is higher than the lower end of the hole slot.

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