Welding device for production of automobile seat framework and welding process of welding device

Abstract

The embodiment of the invention provides a welding device for automobile seat framework production and a welding process thereof, and relates to the technical field of welding. A sliding groove is formed in the bottom face of an inner cavity of a wire feeding box, a base is further connected to the bottom face of the inner cavity of the wire feeding box in a sliding mode, a sliding block fixedly connected to the bottom face of the base is in sliding connection with the sliding groove, and two first supports are further fixed to the base. A wire feeding wheel is connected to the front face of the first support, a lower pressing wheel is further oppositely arranged above the wire feeding wheel, a threaded sleeve is fixedly connected to one side of the upper surface of the base, a first motor is further fixed to the bottom face of an inner cavity of the wire feeding box, a threaded rod extends from the output end of the first motor to the base, and the threaded rod is in threaded connection with the threaded sleeve. When the welding gun breaks away from welding, the controller starts the first motor, the welding wire retracts from the welding gun head by a certain distance, adhesion with a workpiece or a molten pool is avoided, and it is guaranteed that the welding wire is smoothly sent out during next welding.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, and in particular relates to a welding device and a welding process for producing an automobile seat frame. Background Art

[0002] In the automobile manufacturing industry, the production of automobile seat frames is a key link, and its quality directly affects the safety, comfort and durability of the seats. As one of the core processes in the production of automobile seat frames, welding technology is widely used in the connection and fixation of frames. Traditional automobile seat frame welding devices usually include welding arms, welding wire feeding systems, control systems and other parts. The welding arm is responsible for performing the welding operation, and the welding wire feeding system ensures that the welding wire can be continuously and stably supplied to the welding point.

[0003] In the prior art (for example, the patent application with announcement number CN116423012A and patent name of a reciprocating welding wire feeding device), the welding head moves under the action of the welding manipulator to draw a welding track, and the wire feeding speed is changed at different times according to the requirements of the welding track, thereby improving the welding quality, avoiding slag inclusion and welding instability, and being more efficient than manual operation, and not requiring high professional skills of the operator. In the process of implementing this technical solution, it is found that there are at least the following problems in the prior art.

[0004] In the above patent, when the welding device is performing welding, the welding wire is transported by the wire feeding mechanism. When the welding is completed in a short distance, the welding wire cannot be retracted, and the welding wire will be fused with the welding pool, which will affect the subsequent welding quality. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems in the prior art that the welding wire cannot be retracted. To this end, the present application proposes a welding device and a welding process for producing a car seat frame.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the present invention is as follows: a welding device for producing automobile seat frames, comprising a wire feeding box and a winding roller connected to one side of the wire feeding box, a slide groove is provided on the bottom surface of the inner cavity of the wire feeding box, and a base is also slidably connected to the bottom surface of the inner cavity of the wire feeding box, a slider fixedly connected to the bottom surface of the base forms a sliding connection with the slide groove, two brackets 1 are respectively fixed on the base, a wire feeding wheel is connected to the front of the bracket 1, and a lower pressure wheel is relatively arranged above the wire feeding wheel, the lower pressure wheel is supported and connected by a rotating shaft frame extending from the bracket 1, a threaded sleeve is fixedly connected to one side of the upper surface of the base, a motor 1 is also fixed to the bottom surface of the inner cavity of the wire feeding box, a screw rod extends from the output end of the motor 1 toward the base, and the screw rod and the threaded sleeve form a threaded connection.

[0007] Preferably, a rotating shaft passes through one side of the bracket, and a connecting rod is connected to the end of the rotating shaft. A threaded connection is formed between the connecting rod and the rotating shaft through bolts, and a bearing ring is connected to the connecting rod at the position where the bolt passes, and the end of the connecting rod is connected to the center of the winding roller.

[0008] Preferably, a lower pressure cover is sleeved on the lower pressure wheel, one end of the lower pressure cover is connected through the rotating shaft frame, a worm gear 1 is fixed at the penetration point of the lower pressure cover, and a worm shaft is meshed under the two worm gears 1, and the worm shaft is fixedly supported by a bracket 2 extending from the rotating shaft frame.

[0009] Preferably, the center of the wire feeding wheel is penetrated by one end of a rotating shaft, a worm gear 2 is fixed to one end of the rotating shaft, and a worm gear 1 is meshed above the two worm gears 2.

[0010] Preferably, the end of the rotating shaft frame is fixedly connected with the bracket one through the bracket three, and one end of the worm gear one passes through one side of the bracket three, and the end of one side of the worm gear one is connected to the motor two, and a limiting column is located on the inner wall of the wire feeding box and extends toward the direction of the motor two.

[0011] Preferably, a conduit 2 is fixed between the two brackets 1, and the middle part of the conduit 2 is opened through, and electromagnetic valve telescopic rods are fixed above and below the penetration point of the conduit 2, and clamping blocks for supporting the welding wire are also fixed at the ends of the two opposite electromagnetic valve telescopic rods.

[0012] Preferably, a piston rod extends upward from the upper surface of the base, the piston rod is symmetrically arranged on the left and right sides, and a piston piece is fixed to the end of the piston rod, and a pressurized tube is sleeved on the outer circumference of the left and right piston rods.

[0013] Preferably, the two pressurized tubes extend out of the cover plate and have air pipes extending toward the wire feeding box, and an air cylinder with an internal hollow structure is fixed at the end of the air pipe. The lower part of the air cylinder is placed inside the wire feeding box and faces the welding wire area.

[0014] Preferably, an exhaust pipe is fixed at the end of the gas cylinder, and an exhaust hole for exhausting gas is opened on the outer circumference of the exhaust pipe facing the inside of the gas cylinder. Valve pipes are also fixed on the outer circumferences of the two pressurizing pipes, and the insides of the valve pipes and the pressurizing pipes are respectively provided with a one-way valve 2 and a one-way valve 1 for controlling the flow direction of gas.

[0015] An automobile welding process, S1: During welding, the lower pressure wheel presses down and feeds the wire through the wire feeding wheel, and the welding gun performs welding. After welding is completed, the motor drives the screw rod, the welding wire is tightened by the clamping block, and the welding wire retracts from the welding gun head to avoid adhesion to the workpiece or the molten pool; S2: When the base moves, the piston rod and the piston member squeeze the gas in the pressurized tube, the gas enters the gas cylinder and increases the pressure, and is finally discharged through the exhaust hole to clean the impurities in the wire feeding box; S3: Worm one drives pulley two to rotate, and the rotating rod rotates through the belt. Worm two drives worm wheel three to rotate. When the air hole on the rotary valve is connected to the exhaust hole, the pressurized gas is quickly discharged to further clean the impurities in the wire feeding box.

[0016] A sewage treatment agent spreading device of the present invention: 1. The welding device for producing automobile seat frames, when the automobile seat frame is welded by the welding gun, the welding wire is continuously fed by the wire feeding wheel. When the welding gun needs to be separated from welding, the motor is controlled by the controller to run, and then the motor drives the screw, and the screw and the threaded sleeve form a threaded connection, so that the base can be retracted along the direction of the slide groove. Since the welding wire is pressed down and tightened by the wire feeding wheel and the lower pressure wheel, the welding wire can be retracted from the welding gun head for a distance, so that the welding wire can avoid sticking to the workpiece or the molten pool, ensuring that the welding wire can be smoothly fed out during the next welding. In addition, since the winding roller retracts and moves together through the connecting rod, the welding wire is prevented from twisting and deformation.

[0017] 2. For the welding device used in the production of automobile seat frames, before the welding wire stops being conveyed and needs to be conveyed again, the controller controls the operation of the telescopic rod of the solenoid valve, and then the telescopic rod of the solenoid valve is in a power-off state, and the clamping block fixedly connected at its end can clamp the welding wire. Then, when the screw rotates to retract the welding wire, the retraction and fixation of the welding wire is further improved by the clamping block to prevent slipping. Before the welding wire needs to be welded again, the screw is reversed, and after the welding wire moves to the initial position, the telescopic rod of the solenoid valve is energized to make the clamping block release the clamped welding wire, and then the welding wire is conveyed by the wire feeding wheel.

[0018] 3. The welding device for producing automobile seat frames, as the base is driven to move by the screw, the piston rod fixedly connected above the base can move together. During the movement of the piston rod, the piston member fixedly connected to the end of the piston rod squeezes the gas inside the pressurized tube, and then the gas inside the pressurized tube can enter the interior of the gas cylinder. As the pressure inside the gas cylinder continues to increase, the airflow can be discharged through the exhaust hole, and then some impurities inside the wire feeding box are discharged from the holes opened on the surface of the filter plate.

[0019] 4. The welding device for producing automobile seat frames, after the base is driven to reciprocate by the screw, its piston squeezes the air flow inside the pressurized tube, and the air flow can enter the interior of the air cylinder. As the welding wire is driven and transported by the worm one again, the worm one drives the pulley two to rotate, and the pulley two can make the rotating rod rotate continuously through the belt. After the rotating rod rotates, the worm two makes the worm wheel three rotate. As the air hole on the rotary valve is connected with the exhaust hole, the pressurized gas inside can be quickly discharged, thereby cleaning the impurities inside the wire feeding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the explosion structure of the wire feeding box of the present invention; Figure 3 It is a schematic diagram of the structure of the wire feeding wheel and the lower pressing wheel of the present invention; Figure 4 It is an exploded schematic diagram of the internal structure of the wire feeding box of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle; Figure 6 It is a schematic diagram of the connecting rod structure of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure of the middle BB section; Figure 8 It is a schematic diagram of the structure of the wire feeding box from top view of the present invention; Fig. 9 It is a schematic diagram of the structure of the base of the present invention when viewed from above; Fig.10 It is a schematic diagram of the piston rod structure of the present invention; Fig.11 It is a schematic diagram of the structure of a worm of the present invention; Fig.12 It is a partial perspective structural diagram of the gas cylinder of the present invention; Fig.13 It is a schematic diagram of the trachea structure of the present invention; Fig.14 For the present invention Fig.13 Schematic diagram of the AA section structure; Fig.15 It is a schematic diagram of the exhaust pipe structure of the present invention; Fig.16 For the present invention Fig.11 The enlarged structural diagram at B in the middle; Fig.17 It is a schematic diagram of the structure of the rotary valve of the present invention.

[0022] Explanation of the markings in the figure: 1. Base; 11. Welding arm; 12. Welding gun; 13. Wire feeding box; 131. Cover plate; 132. Filter plate; 14. Conduit 1; 15. Slide; 16. Bracket 4; 161. Limiting column; 2. Wire feeding wheel; 21. Lower pressure wheel; 211. Lower pressure cover; 212. Worm gear 1; 22. Base; 221. Bracket 1; 222. Slider; 223. Piston rod; 224. Piston member; 23. Worm gear 2; 231. Rotating shaft; 24. Worm gear 1; 241. Motor 2; 242. Pulley 2; 243. Rectangular block; 244. Belt; 25. Rotating shaft frame; 251. Worm shaft; 252, bracket two; 253, bracket three; 26, crossbeam; 261, guide tube two; 262, solenoid valve telescopic rod; 263, clamping block; 3, winding roller; 31, connecting rod; 311, bolt; 312, bearing ring; 4, motor one; 41, screw; 42, threaded sleeve; 5, air cylinder; 51, exhaust cylinder; 511, exhaust hole; 52, air pipe; 521, pressurized pipe; 522, valve pipe; 523, one-way valve one; 524, one-way valve two; 53, bracket five; 6, rotating rod; 61, pulley one; 62, worm two; 7, rotating valve; 71, worm gear three; 72, air hole. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 3As shown, the welding device for producing the automobile seat frame of the present invention is composed of a welding gun 12 and a welding arm 11 capable of performing displacement welding on the welding gun 12. One end of the welding gun 12 is connected to one end of the welding arm 11, and moves with the movement of the welding arm 11. At the same time, the free end of the welding arm 11 is supported and fixed by the base 1, so that the welding device can perform welding processing on the automobile seat. A wire feeding box 13 is also fixed on one side of the outer surface of the welding arm 11, and the inside of the wire feeding box 13 continuously feeds wire to the welding gun 12 through a wire feeding mechanism. At the same time, a winding roller 3 is also connected to one side of the wire feeding box 13, and a guide tube 14 is fixed on both sides of the outer surface of the wire feeding box 13. When the seat needs to be welded, the rolled welding wire is placed on the axis, and the welding wire passes through the guide tube 14 and is transported by the wire feeding mechanism, so that the welding wire can be transported continuously. A controller is also fixed on the welding arm 11 , and is used to control the operation of the welding device, including the movement of the welding arm 11 .

[0025] The interior of the wire feeding box 13 is hollow in structure, and one side is open. A cover plate 131 is fastened to the opening by bolts, and a filter plate 132 is connected below the cover plate 131. The surface of the filter plate 132 is open to filter the passing air.

[0026] like Figures 3 to 9 As shown, the wire feeding mechanism is composed of two lower pressure wheels 21 and a wire feeding wheel 2 which are arranged opposite to each other in the upper and lower directions, and the two lower pressure wheels 21 are arranged adjacent to each other at intervals on the left and right, and the wire feeding wheels 2 are arranged in the same manner, and a bracket 221 is attached to the back of the two wire feeding wheels 2, and one end of a rotating shaft 231 for driving the wire feeding wheel 2 to rotate passes through the upper end surface of the bracket 221, and a worm gear 23 is fixed at one end of the rotating shaft 231, and the other end of the rotating shaft 231 passes through the center of the wire feeding wheel 2, and a base 22 is fixed at the bottom of the bracket 221, and the base 22 is slidably connected to the bottom surface of the inner cavity of the wire feeding box 13, and the connection is placed in the inside of the slide groove 15 through a slider 222, thereby forming a sliding fit, and one side of the slider 222 is fixedly connected to the bottom surface of the base 22, and the slide groove 15 is opened on the bottom surface of the inner cavity of the wire feeding box 13, so that the base 22 can slide and displace along the length direction of the slide groove 15.

[0027] A crossbeam 26 is connected between the two brackets 221, and the two ends of the crossbeam 26 are fixedly connected to the surface of the bracket 221 respectively. At the same time, a bracket 3 253 extends upward from the upper surface of the crossbeam 26, and two rotating shaft frames 25 are symmetrically located on the outer circumference of the bracket 3 253. One end of the lower pressure cover 211 used to press down the lower pressure wheel 21 is penetrated and connected by one of the rotating shaft frames 25, so that the lower pressure cover 211 can rotate around the rotating shaft frame 25 as the axis, and the center of the circle of the lower pressure wheel 21 is connected to the lower pressure cover 211. A worm gear 212 is fixed at the penetration point of the lower pressure cover 211, and a worm shaft 251 is meshed under the two worm gears 212. The worm shaft 251 is fixedly supported by the bracket 2 252 extending from the rotating shaft frame 25. Therefore, when the welding wire passes through the conduit 14 and passes between the wire feeding wheel 2 and the lower pressure wheel 21, the worm shaft 251 can be rotated at this time. As the worm shaft 251 rotates, the worms at both ends of the worm shaft 251 can respectively and synchronously drive the two lower pressure wheels 21, thereby facilitating adjustment. At the same time, a conduit 261 is fixed on the surface of the bracket 3 253 between the two wire feeding wheels 2, and the welding wire is further guided and transported through the conduit 261 to prevent deviation.

[0028] A connecting rod 31 is connected to the end of the rotating shaft 231, and a threaded connection is formed between the connecting rod 31 and the rotating shaft 231 through a bolt 311, and a bearing ring 312 is connected to the connecting rod 31 where the bolt 311 passes through, so when the rotating shaft 231 rotates, the bearing ring 312 can prevent the connecting rod 31 from causing movement, and the end of the connecting rod 31 is connected to the center of the winding roller 3. Therefore, when the bracket 221 moves to one side, the winding roller 3 can be moved together through the connecting rod 31.

[0029] A worm 1 24 is meshed above the two worm wheels 23, and one end of the worm 1 24 passes through one side of the bracket 3 253 and can rotate along the center of the circle through which the worm 1 24 passes. Therefore, when the bracket 3 253 moves, the worm 1 24 can move with it. A motor 241 is connected to one end of the worm 1 24, and a limiting column 161 is extended toward the motor 241 from the inner wall of the wire feeding box 13. When the motor 241 is running, the motor 241 makes the worm 1 24 rotate, and the worm 1 24 rotates along with the two worm wheels 23, thereby making the wire feeding wheel 2 transport the welding wire.

[0030] A motor 4 is also fixed on the bottom surface of the inner cavity of the wire feeding box 13. A screw 41 extends from the output end of the motor 4 to the base 22. The screw 41 is threadedly connected to a threaded sleeve 42 fixedly connected to one side of the upper surface of the base 22. The motor 4 is preferably a servo motor. When the automobile seat frame is welded by the welding gun 12, the welding wire is continuously fed by the wire feeding wheel 2. When the welding gun 12 needs to be separated from welding, the motor 4 is controlled by the controller to operate. Then the motor 4 drives the screw 41, and the screw 41 is threadedly connected to the threaded sleeve 42, so that the base 22 can be retracted along the direction of the slide groove 15. Since the welding wire is pressed down and tightened by the wire feeding wheel 2 and the lower pressure wheel 21, the welding wire can be retracted from the head of the welding gun 12 for a distance, so that the welding wire is prevented from sticking to the workpiece or the molten pool, ensuring that the welding wire can be smoothly delivered during the next welding. In addition, since the winding roller 3 is retracted and displaced together through the connecting rod 31, the welding wire is prevented from being twisted and deformed.

[0031] like Figure 5 As shown, the middle part of the conduit 261 is penetrated and opened, and the electromagnetic valve telescopic rod 262 is fixed at the upper and lower parts of the conduit 261, and the two opposite ends of the electromagnetic valve telescopic rod 262 are also fixed with clamping blocks 263 for holding the welding wire. The electromagnetic valve telescopic rod 262 is controlled and connected by the controller. Before the welding wire stops being conveyed and needs to be conveyed again, the controller controls the operation of the electromagnetic valve telescopic rod 262, and then the electromagnetic valve telescopic rod 262 is in a power-off state, and the clamping block 263 fixedly connected at its end can clamp the welding wire. Then, when the screw 41 rotates to retract the welding wire, the retraction and fixation of the welding wire is further improved by the clamping block 263 to prevent slippage. Before the welding wire needs to be welded again, the screw 41 is reversed. After the welding wire moves to the initial position, the electromagnetic valve telescopic rod 262 is energized to release the clamped welding wire by the clamping block 263, and then the welding wire is conveyed by the wire feeding wheel.

[0032] like Figures 10 to 14 As shown, a piston rod 223 extends upward from the upper surface of the base 22, and the piston rod 223 is symmetrically arranged on the left and right sides, and a piston member 224 is fixed to the end of the piston rod 223. At the same time, a pressurizing tube 521 is sleeved on the outer circumference of the left and right piston rods 223. The two pressurizing tubes 521 extend out of the cover plate 131 and extend an air pipe 52 to the wire feeding box 13. An air cylinder 5 with an internal hollow structure is fixed to the end of the air pipe 52. The lower part of the air cylinder 5 is placed inside the wire feeding box 13 and faces the welding wire area.

[0033] At the same time, an exhaust cylinder 51 is fixed at the end of the gas cylinder 5, and an exhaust hole 511 for exhaust is opened on the outer peripheral surface of the exhaust cylinder 51 toward the inside of the gas cylinder 5. A valve tube 522 is also fixed on the outer peripheral surface of the two pressurizing tubes 521, and the inside of the valve tube 522 and the pressurizing tube 521 are respectively provided with a check valve 2 524 and a check valve 1 523 for controlling the flow direction of gas. As the base 22 is driven to move by the screw 41, the piston rod 223 fixedly connected above the base 22 can move together. During the movement of the piston rod 223, the piston member 224 fixedly connected at the end of the piston rod 223 squeezes the gas inside the pressurizing tube 521, and then the gas inside the pressurizing tube 521 can enter the inside of the gas cylinder 5. As the pressure inside the gas cylinder 5 continues to increase, the air flow can be discharged through the exhaust hole 511, and then some impurities inside the wire feeding box 13 are discharged from the holes opened on the surface of the filter plate 132.

[0034] like Figure 8 and Figures 15 to 17 As shown, when gas is stored inside the gas cylinder 5, the pressure inside the gas cylinder 5 will rise accordingly. After the pressure inside the gas cylinder 5 rises, it cannot be discharged regularly with the operation of the equipment. The interior of the exhaust cylinder 51 is hollow, and a rotary valve 7 for rotation is arranged inside. At the same time, the outer peripheral surface of the rotary valve 7 is penetrated with an air hole 72 that communicates with the exhaust hole 511. A worm gear 71 is located at one end of the rotary valve 7 and extends out of the exhaust cylinder 51.

[0035] A bracket 53 is fixed on one side of the outer circumference of the exhaust pipe 51, and one end of a rotating rod 6 for rotation passes through the bracket 53, and one end of a worm 2 62 driving the worm gear 3 71 is connected to the end of the rotating rod 6. A pulley 1 61 is also fixed to the other end of the rotating rod 6, so when the rotating rod 6 rotates, the worm gear 3 71 can be rotated through the worm 2 62.

[0036] A rectangular block 243 is fixed on one side of the outer circumference of the worm 1 24, and a pulley 242 is sleeved on the outer circumference of the rectangular block 243. At the same time, the rotation support of the pulley 242 is supported by the bracket 416 fixed on the inner wall of the wire feeding box 13, and the belt 244 is directly sleeved between the pulley 242 and the pulley 1 61. After the base 22 is driven to reciprocate by the screw 41, the piston 224 squeezes the air flow inside the pressurized tube 521, and the air flow can enter the inside of the gas cylinder 5. When the welding wire is driven and transported by the worm 1 24 again, the worm 1 24 drives the pulley 242 to rotate. The pulley 242 can make the rotating rod 6 rotate continuously through the belt 244. After the rotating rod 6 rotates, the worm gear 3 71 rotates through the worm 2 62. After the air hole 72 on the rotary valve 7 is connected with the exhaust hole 511, the pressurized gas inside it can be quickly discharged, and then it plays a role in cleaning the impurities inside the wire feeding box 13.

[0037] Automobile seat welding process, when the seat needs to be welded, the lower pressure wheel 21 is pressed down, and the wire is fed through the wire feeding wheel 2, and then the welding process is performed through the welding gun 12. When the welding is completed, the motor 4 drives the screw rod 41, and the screw rod 41 forms a threaded connection with the threaded sleeve 42, and then the base 22 is retracted along the direction of the slide groove 15. Since the welding wire is pressed down and tightened by the clamping block 263, the welding wire can be retracted from the head of the welding gun 12 for a distance, and then the welding wire is prevented from sticking to the workpiece or the molten pool. As the base 22 is driven to move by the screw rod 41, the piston rod 223 fixedly connected to the top of the base 22 can move together. During the movement of the piston rod 223, the piston member 224 fixedly connected to the end of the piston rod 223 squeezes the inside of the pressurized tube 521 The gas in the pressurized tube 521 can then enter the interior of the gas cylinder 5. As the pressure inside the gas cylinder 5 continues to increase, the airflow can be discharged through the exhaust hole 511, and then some impurities in the wire feeding box 13 are discharged from the holes opened on the surface of the filter plate 132; when the airflow enters the interior of the gas cylinder 5, the welding wire is driven and transported by the worm 24 again. At this time, the worm 24 drives the pulley 242 to rotate, and the pulley 242 can make the rotating rod 6 rotate continuously through the belt 244. After the rotating rod 6 rotates, the worm gear 3 71 is rotated through the worm 2 62. After the air hole 72 on the rotary valve 7 is connected with the exhaust hole 511, the pressurized gas inside it can be quickly discharged, and then it plays a role in cleaning the impurities inside the wire feeding box 13.

[0038] The working principle of the welding device for the production of automobile seat frames: when the seat needs to be welded, the lower pressure wheel 21 is pressed down, and the wire is fed through the wire feeding wheel 2, and then the welding process is performed through the welding gun 12. When the welding is completed, the motor 4 drives the screw rod 41, and the screw rod 41 forms a threaded connection with the threaded sleeve 42, and then the base 22 is retracted along the direction of the slide groove 15. Since the welding wire is pressed down and tightened by the clamping block 263, the welding wire can be retracted from the head of the welding gun 12 for a distance, and then the welding wire is prevented from sticking to the workpiece or the molten pool. As the base 22 is driven to move by the screw rod 41, the piston rod 223 fixedly connected to the top of the base 22 can move together. During the movement of the piston rod 223, the piston member 224 fixedly connected to the end of the piston rod 223 squeezes the pressurized tube The gas inside 521 and then the gas inside the pressurized tube 521 can enter the interior of the gas cylinder 5. As the pressure inside the gas cylinder 5 continues to increase, the air flow can be discharged through the exhaust hole 511, and then some impurities inside the wire feeding box 13 are discharged from the holes opened on the surface of the filter plate 132; when the air flow enters the interior of the gas cylinder 5, the welding wire is driven and transported by the worm 24 again. At this time, the worm 24 drives the pulley 242 to rotate, and the pulley 242 can make the rotating rod 6 rotate continuously through the belt 244. After the rotating rod 6 rotates, the worm gear 3 71 is rotated through the worm 2 62. After the air hole 72 on the rotary valve 7 is connected with the exhaust hole 511, the pressurized gas inside it can be quickly discharged, and then the impurities inside the wire feeding box 13 are cleaned.

[0039] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention.

Claims

1. A welding device for producing an automobile seat frame, comprising a wire feeding box (13), and a winding roller (3) connected to one side of the wire feeding box (13), characterized in that: A slide groove (15) is provided on the bottom surface of the inner cavity of the wire feeding box (13), and a base (22) is slidably connected to the bottom surface of the inner cavity of the wire feeding box (13). A slider (222) fixedly connected to the bottom surface of the base (22) forms a sliding connection with the slide groove (15). Two brackets (221) are fixed on the base (22). A wire feeding wheel (2) is connected to the front of the bracket (221), and a lower pressure wheel (21) is relatively arranged above the wire feeding wheel (2). The lower pressure wheel (21) is supported and connected by a rotating shaft frame (25) extending from the bracket (221). A threaded sleeve (42) is fixedly connected to one side of the upper surface of the base (22). A motor (4) is also fixed on the bottom surface of the inner cavity of the wire feeding box (13). A screw (41) extends from the output end of the motor (4) toward the base (22), and the screw (41) and the threaded sleeve (42) form a threaded connection.

2. The welding device for producing a car seat frame according to claim 1, characterized in that: A rotating shaft (231) passes through one side of the bracket (221); the end of the rotating shaft (231) is connected to a connecting rod (31); the connecting rod (31) and the rotating shaft (231) are threadedly connected via a bolt (311); a bearing ring (312) is connected to the connecting rod (31) at a position where the bolt (311) passes through; and the end of the connecting rod (31) is connected to the center of the winding roller (3).

3. The welding device for producing automobile seat frames according to claim 2 is characterized in that: The lower pressing wheel (21) is sleeved with a lower pressing cover (211), one end of which is penetrated and connected by a rotating shaft frame (25), a worm gear 1 (212) is fixed at the penetration point of the lower pressing cover (211), and a worm shaft (251) is meshed below the two worm gears 1 (212), and the worm shaft (251) is fixedly supported by a bracket 2 (252) extending from the rotating shaft frame (25).

4. The welding device for producing a car seat frame according to claim 3 is characterized in that: One end of a rotating shaft (231) passes through the center of the wire feeding wheel (2), a worm gear 2 (23) is fixed to one end of the rotating shaft (231), and a worm gear 1 (24) is meshed above the two worm gears 2 (23).

5. The welding device for producing automobile seat frames according to claim 4 is characterized in that: The end of the rotating shaft frame (25) is fixedly connected to the bracket one (221) through the bracket three (253), and one end of the worm gear one (24) passes through one side of the bracket three (253), and the end of the one side of the worm gear one (24) is connected to the motor two (241), and a limiting column (161) is extended from the inner wall of the wire feeding box (13) toward the direction of the motor two (241).

6. The welding device for producing a car seat frame according to claim 5, characterized in that: A second conduit (261) is fixed between the two first brackets (221), and a through-opening is formed in the middle of the second conduit (261). Solenoid valve telescopic rods (262) are respectively fixed above and below the through-opening of the second conduit (261), and clamping blocks (263) for holding the welding wire are also respectively fixed at the ends of the two opposite solenoid valve telescopic rods (262).

7. The welding device for producing a car seat frame according to claim 6, characterized in that: A piston rod (223) extends upward from the upper surface of the base (22). The piston rod (223) is symmetrically arranged on the left and right sides, and a piston member (224) is fixed to the end of the piston rod (223). At the same time, a pressurizing tube (521) is sleeved on the outer circumference of the left and right piston rods (223).

8. The welding device for producing a car seat frame according to claim 7, characterized in that: The two pressurizing tubes (521) extend out of the cover plate (131) and extend toward the wire feeding box (13) to form an air pipe (52). An air cylinder (5) with an internal hollow structure is fixed at the end of the air pipe (52). The lower part of the air cylinder (5) is placed inside the wire feeding box (13) and faces the welding wire area.

9. The welding device for producing a car seat frame according to claim 8, characterized in that: An exhaust cylinder (51) is also fixed at the end of the gas cylinder (5), and an exhaust hole (511) for exhausting gas is provided on the outer peripheral surface of the exhaust cylinder (51) toward the inside of the gas cylinder (5). A valve tube (522) is also fixed on the outer peripheral surface of the two pressurizing tubes (521), and a second check valve (524) and a first check valve (523) for controlling the flow direction of gas are respectively provided inside the valve tube (522) and the pressurizing tube (521).

10. An automobile welding process, based on the welding device for producing an automobile seat frame according to any one of claims 1 to 9, characterized in that: Said S1: During welding, the lower pressure wheel (21) is pressed down and the wire is fed through the wire feeding wheel (2), and the welding gun (12) performs welding. After welding, the motor (4) drives the screw (41), the welding wire is fastened by the clamping block (263), and the welding wire is retracted from the head of the welding gun (12) to avoid adhesion to the workpiece or the molten pool; S2: When the base (22) moves, the piston rod (223) and the piston member (224) squeeze the gas in the pressurized tube (521), the gas enters the gas cylinder (5) and increases the pressure, and is finally discharged through the exhaust hole (511), cleaning the impurities in the wire feeding box (13); S3: The worm gear 1 (24) drives the pulley 2 (242) to rotate, and the rotating rod (6) is rotated through the belt (244), and the worm gear 2 (62) drives the worm gear 3 (71) to rotate. When the air hole (72) on the rotary valve (7) is connected to the exhaust hole (511), the pressurized gas is quickly discharged to further clean the impurities in the wire feeding box (13).

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