Automobile part spot welding robot

Abstract

The invention relates to the technical field of automobile part spot welding, in particular to an automobile part spot welding robot which comprises a fixed conveying mechanism and a positioning welding mechanism, the fixed conveying mechanism is placed on the ground, and the positioning welding mechanism is arranged on the rear side of the fixed conveying mechanism; according to the automobile door inner plate surface cleaning device, intermittent conveying and moving are conducted on an automobile door inner plate through the fixed conveying mechanism, and meanwhile surface cleaning is conducted, so that the situation that full attachment of the automobile door inner plate and a reinforcing rib is affected by particle dirt is prevented; and then the two sides of a welding point and a welding head are sequentially subjected to stable and sufficient welding of local compression and pressure maintaining after spot welding, and the welding effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts spot welding, in particular to an automobile parts spot welding robot. Background Art

[0002] Spot welding is a resistance welding method that generates heat by passing an electric current through the contact points of two or more metal workpieces to melt the metal and form welds. Spot welding is widely used in automobile manufacturing, especially in the body assembly process. The reinforcement ribs of the door inner panel are installed through spot welding technology. The reinforcement ribs of the door inner panel play a key role in the automobile structure. Most of them use long cap-shaped reinforcement ribs, which not only enhance the rigidity and impact resistance of the door, but also improve the stability of the overall body.

[0003] During the spot welding and installation process of the door inner panel and the reinforcement rib, the welding position of the door inner panel was not cleaned, and there was dirt on the door inner panel, which affected the full fit between the door inner panel and the reinforcement rib, thereby reducing the strength of the spot welding; secondly, the door inner panel and the reinforcement rib were only limited and fixed as a whole, and the two sides of the welding point between the door inner panel and the reinforcement rib were not tightened, which resulted in gaps at the welding position during spot welding, affecting the connection strength. Summary of the invention

[0004] Technical problem to be solved: The present invention provides an automobile parts spot welding robot, which can solve the difficult problems pointed out in the above background technology.

[0005] Technical solution: To achieve the above objectives, the present invention adopts the following technical solution: a spot welding robot for automotive parts, comprising a fixed conveying mechanism and a positioning welding mechanism, wherein the fixed conveying mechanism is placed on the ground, and a positioning welding mechanism is arranged at the rear side of the fixed conveying mechanism.

[0006] The fixed conveying mechanism includes a conveyor, a front baffle is installed on the front side of the conveyor, a rear baffle is installed on the rear side of the conveyor, the middle part of the rear baffle is a stepped plate structure with the left side lower and the right side higher, a cleaning component for cleaning the welding position is arranged on the right side of the rear baffle, and a clamping edge component for flexibly fixing the inner panel of the vehicle door is detachably installed on the conveyor.

[0007] The positioning welding mechanism includes a mounting base, which is arranged on the ground. A sliding track is provided on the upper end surface of the mounting base. A sliding pillar is slidably installed in the sliding track. A limiting component for positioning and fixing the reinforcing rib is installed on the upper end of the sliding pillar. A spot welding component for welding and fixing the door inner panel and the reinforcing rib is arranged on the limiting component.

[0008] Further, the cleaning assembly includes a U-shaped plate which is arranged with an opening facing forward. Brush hairs are evenly arranged at the upper and lower ends inside the U-shaped plate, and the brush hairs at the upper and lower positions are arranged in a staggered manner up and down. Adsorption holes are evenly formed at the positions between the brush hairs at the upper and lower ends inside the U-shaped plate. A storage box is detachably arranged at the position corresponding to the rear end face of the rear baffle and the U-shaped plate. An air suction pump is installed on the storage box, and all the adsorption holes are communicated with the storage box.

[0009] Further, the clamping edge assembly includes a fixed frame. Clamping plates are symmetrically installed on the upper and lower inner walls of the upper part of the fixed frame. An air bag is installed on the lower end face of the upper clamping plate. A plurality of rollers are rotatably embedded at the positions between the two clamping plates on the left and right inner walls of the fixed frame.

[0010] Further, the fixed frame and the clamping plates are both U-shaped structures with openings facing backward. Semi-circular protrusions are arranged in the middle of the outer end faces of the fixed frames. Card position groups are evenly arranged on the conveyor belt of the conveyor.

[0011] Further, the card position groups are a plurality of card position blocks corresponding to the positions of the semi-circular protrusions of the fixed frames. Semi-circular grooves are formed on the card position blocks and are matched with the semi-circular protrusions of the fixed frames.

[0012] Further, the limiting assembly includes an L-shaped frame. The bottom of the vertical section of the L-shaped frame is installed on a sliding support column. Positioning plates are symmetrically installed on the left and right of the end face of the vertical section of the L-shaped frame close to the card position group. An electric telescopic rod is installed on the lower end face of the horizontal section of the L-shaped frame. A cross plate is installed at the telescopic end of the electric telescopic rod. Connecting rods are installed at the positions close to the left and right sides of the lower end face of the cross plate. A pressing plate is jointly installed at the lower ends of the two connecting rods. A trapezoidal groove is formed at the position between the two connecting rods at the lower end of the pressing plate. A stabilizing rib is arranged between the connecting rod and the pressing plate.

[0013] Further, a card position long hole is formed at the front part of the positioning plate. Stopping blocks are installed on the opposite faces of the front parts of the two positioning plates. A positioning groove is formed at the position corresponding to the pressing plate on the upper end face of the positioning plate. A support rod is jointly connected to the lower end faces of the front parts of the two positioning plates.

[0014] Further, the spot welding assembly includes a telescopic cylinder. The telescopic cylinder is embedded and installed at the middle position between the two positioning plates on the vertical section of the L-shaped frame. Support telescopic rods are embedded and installed on the left and right sides of the telescopic cylinder. A displacement box is jointly installed at the telescopic ends of the telescopic cylinder and the support telescopic rods. An installation groove is formed at the middle of the front end of the displacement box. A transverse screw rod is rotatably installed in the installation groove. One end of the transverse screw rod extends outside the displacement box. An intermittent rotation motor is installed on the displacement box through a motor seat. The output shaft of the intermittent rotation motor is connected to the transverse screw rod extending outside the displacement box. An installation frame is threadedly connected to the transverse screw rod. The installation frame is a U-shaped structure with an opening facing forward.

[0015] Furthermore, a limit groove is vertically provided on the front end face of the vertical section of the mounting frame, and two sliding long blocks are symmetrically slidably arranged in the limit groove, and welding heads are installed on the opposite sides of the two sliding long blocks. The mounting frame is provided with linkage grooves on the left and right sides of the limit groove, and two-way threaded rods are rotatably installed in the linkage grooves. The upper ends of the two-way threaded rods extend outside the mounting frame, and the rotating motor is installed on the mounting frame through a motor seat. The upper end of one of the two-way threaded rods is connected to the output shaft of the rotating motor, and the outer walls of the two-way threaded rods extending outside the mounting frame are connected through a pulley group. The outer walls of the two-way threaded rods are symmetrically threaded with linkage blocks, and a plurality of connecting strips are evenly arranged on the opposite surfaces of the left and right adjacent linkage blocks from front to back. Vertical through holes are provided at the corresponding positions of the side end faces of the sliding long blocks and the connecting strips, and the middle part of the connecting strip is slidably arranged in the vertical through holes.

[0016] Furthermore, spring telescopic rods are installed on the upper and lower opposite surfaces of the linkage block at positions corresponding to the welding head, and a clamping plate is installed at the telescopic end of the spring telescopic rod. The length of the welding head is smaller than the length of the spring telescopic rod. A plurality of convex plates arranged from front to back are commonly installed on the two adjacent linkage blocks on the left and right, and extrusion springs are installed at the raised positions of the convex plates, and the other end of the extrusion spring is installed on the sliding long block.

[0017] Beneficial effects:

[0018] 1. The door inner panel is intermittently transported and moved by a fixed conveying mechanism while the surface is cleaned to prevent particles and dirt from affecting the full fit between the door inner panel and the reinforcement rib. The door inner panel and the reinforcement rib are first positioned and fixed as a whole by a positioning welding mechanism, and then the two sides of the welding point and the welding head are locally pressed to achieve stable and full welding, and the pressure is maintained after spot welding, which improves the welding effect.

[0019] 2. Use the brush of the cleaning component to clean the upper and lower sides of the door inner panel. The cleaned particles and debris are sucked into the storage box from the adsorption hole through the suction pump for collection. This can prevent the particles and debris from affecting the full fit between the door inner panel and the reinforcement rib, resulting in insufficient welding.

[0020] 3. Through the coordination of multiple connecting strips, convex plates and extrusion springs in the welding assembly, the clamping plate first presses the reinforcing rib and the door inner panel, and then the welding head contacts the corresponding reinforcing rib and the door inner panel. The clamping plate locally presses up and down on both sides of the welding point of the reinforcing rib and the door inner panel to ensure the close contact between the welding point of the reinforcing rib and the door inner panel. After that, the linkage block continues to move to make the extrusion spring further elastically press the welding head to ensure the clamping force of the welding head. As the welding position moves, the clamping plate can press up and down on the previous spot welding position to maintain pressure, which greatly improves the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a partial structural diagram of the present invention. Figure 1 .

[0022] Figure 2 For the present invention Figure 1 A magnified view of a top view cross-sectional view.

[0023] Figure 3 For the present invention Figure 1 B is a magnified view of .

[0024] Figure 4 For the present invention Figure 1 C magnified view.

[0025] Figure 5 It is a schematic diagram of the partial structure of the present invention Figure 2 .

[0026] Figure 6 For the present invention Figure 1 Top view of the .

[0027] Figure 7 For the present invention Figure 6 DD section view.

[0028] Figure 8 For the present invention Figure 7 E magnified view.

[0029] Fig. 9 It is a schematic structural diagram of the spot welding assembly of the present invention.

[0030] In the figure: 1. fixed conveying mechanism; 11. conveyor; 12. front baffle; 13. rear baffle; 14. cleaning assembly; 141. L-shaped plate; 142. bristles; 143. adsorption hole; 144. storage box; 15. clamping edge assembly; 151. fixed frame; 152. clamping plate; 153. air bag; 154. roller; 155. semicircular protrusion; 156. clamping block; 2. positioning welding mechanism; 21. mounting base; 22. sliding track; 23. sliding support; 24. limiting assembly; 241. L-shaped frame; 242. positioning plate; 243. electric telescopic rod; 244. horizontal plate; 245. connecting rod; 246. pressure plate; 247. stabilizing rib ; 248, block; 249, support rod; 25, spot welding assembly; 251, telescopic cylinder; 252, support telescopic rod; 253, displacement box; 254, transverse screw; 255, intermittent rotating motor; 256, mounting frame; 257, limit groove; 258, sliding long block; 259, linkage groove; 2510, two-way threaded rod; 2511, rotating motor; 2512, pulley set; 2513, linkage block; 2514, connecting strip; 2515, spring telescopic rod; 2516, clamping plate; 2517, convex plate; 2518, extrusion spring; 2519, vertical through hole; 2520, welding head; 3, door inner panel; 4, reinforcement rib. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1 , Figure 4 , Figure 5 , Figure 6The present invention provides a technical solution: a spot welding robot for automobile parts, comprising a fixed conveying mechanism 1 and a positioning welding mechanism 2, wherein the fixed conveying mechanism 1 is placed on the ground, and the positioning welding mechanism 2 is arranged at the rear side of the fixed conveying mechanism 1; the fixed conveying mechanism 1 comprises a conveyor 11, a front baffle 12 is arranged at the front side of the conveyor 11, and a rear baffle 13 is arranged at the rear side of the conveyor 11, and the middle part of the rear baffle 13 is a stepped plate structure with the left side lower and the right side higher, and a cleaning group for cleaning the welding position is arranged at the right side of the rear baffle 13 Part 14, a clamping assembly 15 for flexibly fixing the door inner panel 3 is detachably installed on the conveyor 11; the positioning welding mechanism 2 includes a mounting base 21, the mounting base 21 is arranged on the ground, a sliding track 22 is provided on the upper end surface of the mounting base 21, a sliding support 23 is slidably installed in the sliding track 22, a limiting assembly 24 for positioning and fixing the reinforcing rib 4 is installed on the upper end of the sliding support 23, and a spot welding assembly 25 for welding and fixing the door inner panel 3 and the reinforcing rib 4 is arranged on the limiting assembly 24. During operation, the door inner panel 3 is placed on the edge clamping assembly 15, and the edge clamping assembly 15 clamps and fixes the edge position of the door inner panel 3. The edge clamping assembly 15 and the door inner panel 3 are intermittently moved to the left by the conveyor 11. During the movement, they pass through the cleaning assembly 14, and the positions to be welded are cleaned and adsorbed and collected by the cleaning assembly 14. When moving to the position of the positioning welding mechanism 2, the conveyor 11 stops intermittently, and moves through the sliding track 22 and the sliding support 23 to move the limiting assembly 24 to the specified position. The limiting assembly 24 first limits the placement of the reinforcement rib 4, and then places the reinforcement rib 4 in the limiting position manually or by a robot, and then the reinforcement rib 4 is pressed and fixed by the limiting assembly 24, and finally the spot welding assembly 25 performs spot welding on the reinforcement rib 4 and the door inner panel 3 in multiple positions in sequence.

[0033] See also Figure 2 , Figure 5, in this embodiment, the cleaning component 14 includes a U-shaped plate 141 with an opening facing forward. The upper and lower ends inside the U-shaped plate 141 are evenly provided with bristles 142, and the bristles 142 at the upper and lower positions are arranged in a staggered manner up and down. The upper and lower ends inside the U-shaped plate 141 are evenly provided with adsorption holes 143 at positions between the bristles 142. A storage box 144 is detachably arranged at a position corresponding to the rear end face of the rear baffle 13 and the U-shaped plate 141. An air suction pump (not shown in the figure) is installed on the storage box 144, and all the adsorption holes 143 are communicated with the storage box 144. During operation, when the inner door panel 3 moves past the inside of the U-shaped plate 141, the upper and lower brushes clean the upper and lower sides of the welding position of the inner door panel 3. The cleaned particulate debris is sucked into the storage box 144 through the existing air suction pump from the adsorption holes 143 for collection, thereby improving the cleaning effect. By cleaning the surface of the welding position of the inner door panel 3, it can prevent particulate debris from affecting the full fit between the inner door panel 3 and the reinforcing rib 4, resulting in insufficient welding.

[0034] Please refer to Figure 7 , in this embodiment, the clamping edge component 15 includes a fixed frame 151. The upper inner walls of the upper part of the fixed frame 151 are symmetrically installed with clamping plates 152. An airbag 153 is installed on the lower end face of the upper clamping plate 152. A plurality of rollers 154 are rotatably embedded at positions between the two clamping plates 152 on the left and right inner walls of the fixed frame 151. The fixed frame 151 and the clamping plates 152 are both U-shaped structures with openings facing backward. Semi-circular protrusions 155 are arranged in the middle of the outer end faces of the fixed frame 151. Positioning groups are evenly arranged on the conveyor belt of the conveyor 11. During operation, through the plurality of rollers 154 provided, when the inner door panel 3 enters the fixed frame 151, it can play a role in guiding and reducing friction, facilitating entry and placement. Subsequently, the airbag 153 is activated, and the airbag 153 cooperates with the lower clamping plate 152 to flexibly clamp the multiple edge positions of the inner door panel 3 inside the fixed frame 151, thereby stably fixing the inner door panel 3. The positioning group is a plurality of positioning blocks 156 corresponding to the positions of the semi-circular protrusions 155 of the fixed frame 151. Semi-circular grooves are provided on the positioning blocks 156 to cooperate with the semi-circular protrusions 155 of the fixed frame 151. By the cooperation of the semi-circular grooves on the plurality of positioning blocks 156 and the semi-circular protrusions 155 of the fixed frame 151, the fixed frame 151 can be limited on the conveyor 11, ensuring stability during movement.

[0035] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 8In this embodiment, the limiting assembly 24 includes an L-shaped frame 241, the bottom of the vertical section of the L-shaped frame 241 is installed on the sliding pillar 23, and the vertical section of the L-shaped frame 241 is symmetrically installed with a positioning plate 242 on the left and right sides of the end surface near the clamping group, and the lower end surface of the horizontal section of the L-shaped frame 241 is installed with an electric telescopic rod 243, and the telescopic end of the electric telescopic rod 243 is installed with a cross plate 244, and the lower end surface of the cross plate 244 is near the left and right sides. Connecting rods 245 are installed at the positions of the lower end surface of the cross plate 244 near the left and right sides, and a pressing plate 246 is installed at the lower ends of the two connecting rods 245. A trapezoidal groove is opened at the lower end of the pressing plate 246 between the two connecting rods 245, and a stabilizing rib 247 is arranged between the connecting rod 245 and the pressing plate 246; the stabilizing rib 247 improves the stability of the connection between the connecting rod 245 and the pressing plate 246. The front of the positioning plate 242 is provided with a long locking hole, and the front opposite surfaces of the two positioning plates 242 are both installed with a stopper 248. A positioning groove is provided at the upper end surface of the positioning plate 242 corresponding to the pressure plate 246, and the front lower end surfaces of the two positioning plates 242 are commonly connected with a support rod 249; when working, when the sliding support 23 drives the L-shaped frame 241 to move to the specified position, the front of the positioning plate 242 moves to the position where welding is required, and the position for placing the reinforcing rib 4 is limited by the front upper part of the positioning plate 242 and the stopper 248. The front lower part of the positioning plate 242 and the support rod 24 9 provides stable support for the door inner panel 3 to prevent the downward pressure of the pressure plate 246 from causing deformation of the door inner panel 3, and then puts in the reinforcing rib 4, and then the upper electric telescopic rod 243 is extended outward, driving the cross plate 244, the connecting rod 245 and the pressure plate 246 to move downward, and the pressure plate 246 moves downward into the positioning groove to clamp and limit the position of the positioning plate 242. At the same time, the lower end of the pressure plate 246 is pressed tightly on the upper part of the reinforcing rib 4. The trapezoidal groove cooperates with the structure of the reinforcing rib 4, and can also limit the front and rear directions of the reinforcing rib 4 to a certain extent, thereby improving the stability of the fixing of the reinforcing rib 4.

[0036] See also Figure 1 , Fig. 9, in this embodiment, the spot welding assembly 25 includes a telescopic cylinder 251. The vertical section of the L-shaped frame 241 is embedded and installed with a telescopic cylinder 251 at the middle position between the two positioning plates 242. Support telescopic rods 252 are embedded and installed on the left and right sides of the telescopic cylinder 251 to improve the stability of movement. A displacement box 253 is jointly installed on the telescopic ends of the telescopic cylinder 251 and the support telescopic rods 252. An installation groove is formed in the middle of the front end of the displacement box 253, and a transverse screw rod 254 is rotatably installed in the installation groove. One end of the transverse screw rod 254 extends outside the displacement box 253. An intermittent rotation motor 255 is installed on the displacement box 253 through a motor base. The output shaft of the intermittent rotation motor 255 is connected to the transverse screw rod 254 extending outside the displacement box 253. An installation frame 256 is threadedly connected to the transverse screw rod 254. The installation frame 256 is a U-shaped structure with an opening facing forward; a limiting groove 257 is vertically formed on the front end face of the vertical section of the installation frame 256. Two sliding long blocks 258 are symmetrically and slidably arranged up and down in the limiting groove 257. A welding head 2520 is installed on the front side of the opposite faces of the two sliding long blocks 258. Linkage grooves 259 are formed at the positions on the left and right sides of the installation frame 256 where the limiting groove 257 is located. Bidirectional threaded rods 2510 are rotatably installed in the linkage grooves 259. The upper ends of the bidirectional threaded rods 2510 all extend outside the installation frame 256. A rotation motor 2511 is installed on the installation frame 256 through a motor base. The upper end of one of the bidirectional threaded rods 2510 is connected to the output shaft of the rotation motor 2511. The outer walls of the two bidirectional threaded rods 2510 extending outside the installation frame 256 are connected through a pulley group 2512. Linkage blocks 2513 are symmetrically and threadedly connected to the outer walls of the bidirectional threaded rods 2510 up and down. A plurality of connecting strips 2514 are evenly arranged from front to back on the opposite faces of the adjacent linkage blocks 2513 on the left and right. Vertical through holes 2519 are formed at the corresponding positions of the side end faces of the sliding long blocks 258. The middle parts of the connecting strips 2514 slide up and down in the vertical through holes 2519.The upper and lower opposite surfaces of the linkage block 2513 are installed with spring telescopic rods 2515 at the positions corresponding to the welding head 2520, and the telescopic ends of the spring telescopic rods 2515 are installed with clamping plates 2516. The length of the welding head 2520 is smaller than the length of the spring telescopic rods 2515. The two adjacent linkage blocks 2513 on the left and right are jointly installed with a plurality of convex plates 2517 arranged from front to back, and the convex positions of the convex plates 2517 are installed with extrusion springs 2518, and the other end of the extrusion springs 2518 is installed on the sliding long block 258. When working, after the reinforcing rib 4 is fixed, it is extended outward through the telescopic cylinder 251, driving the supporting telescopic rods 252 on both sides to extend outward synchronously, so that the displacement box 253 When the welding head 2520 is moved to the welding position, the rotating motor 2511 is started to drive the two bidirectional threaded rods 2510 to rotate synchronously through the pulley group 2512, so that the upper and lower corresponding linkage blocks 2513 move toward each other. When the multiple convex plates 2517 and the extrusion springs 2518 cooperate, the linkage blocks 2513 drive the corresponding sliding long blocks 258 to move synchronously while moving, thereby driving the welding head 2520 and the clamping plate 2516 to approach the position of the door inner panel 3. During the movement, the clamping plate 2516 first contacts the reinforcing rib 4 and the door inner panel 3, and then continues to move to squeeze the spring telescopic rod 2515, and then the welding head 2520 also contacts the corresponding reinforcing rib 4 The linkage block 2513 continues to drive the clamping plate 2516 to move downward to further squeeze the spring telescopic rod 2515. At this time, the welding head 2520 cannot move further, and the connecting strip 2514 slides in the vertical through hole 2519. At the same time, the convex plate 2517 presses the squeezing spring 2518. The welding head 2520 is further elastically compressed by the force of the squeezing spring 2518 to ensure the compression force of the welding head 2520. The clamping plate 2516 is used to press the two sides of the welding point of the reinforcing rib 4 and the inner door panel 3 up and down to ensure that the reinforcing rib 4 and the inner door panel 3 are fully compressed and contacted, the gap is reduced, and the welding stability is improved. When the welding of this welding point is completed, The clamping plate 2516 and the welding head 2520 return to their original positions, and the intermittent rotating motor 255 is started to drive the transverse screw 254 to rotate forward and drive the mounting frame 256 to move to the left to the next position where welding is required, and the above operations are repeated to perform spot welding in sequence. When spot welding is performed on the next position, the clamping plate 2516 can continuously press up and down to maintain the pressure on the previous spot welding position, and this is repeated. When all the spot welding on the rear side of the reinforcement rib 4 is completed, the telescopic cylinder 251 extends outward for a distance, so that the clamping plate 2516 and the welding head 2520 move to the front side of the reinforcement rib 4, and the intermittent rotating motor 255 drives the transverse screw 254 to reverse and perform spot welding on the front side of the reinforcement rib 4 to the right in sequence.

[0037] During specific operation, the inner door panel 3 is smoothly guided into the fixed frame 151 by multiple rollers 154. Subsequently, the airbag 153 is activated. The airbag 153 cooperates with the lower clamping plate 152 to flexibly clamp multiple edge positions of the inner door panel 3 within the fixed frame 151, ensuring both the stability of clamping and not damaging the inner door panel 3. Then, the conveyor 11 moves the edge clamping assembly 15 and the inner door panel 3 to the left intermittently. During the movement, they pass through the cleaning assembly 14. When the inner door panel 3 moves through the inside of the U-shaped plate 141, the upper and lower brushes clean the upper and lower sides of the welding position of the inner door panel 3. The cleaned particulate debris is sucked into the storage box 144 through the existing suction pump from the adsorption holes 143 for collection, thereby improving the cleaning effect. By cleaning the surface of the welding position of the inner door panel 3, it can prevent particulate debris from affecting the full fit between the inner door panel 3 and the reinforcing rib 4, resulting in insufficient welding. When the conveyor 11 drives the edge clamping assembly 15 and the inner door panel 3 to move to the positioning and welding mechanism 2, the conveyor 11 stops intermittently. The limiting component 24 is moved to the designated position by the cooperation of the sliding track 22 and the sliding support column 23. At this time, the front part of the positioning plate 242 moves to the welding position. The position for placing the reinforcing rib 4 is limited by the cooperation of the positioning plate 242 and the stop block 248. Subsequently, the reinforcing rib 4 is placed. Then, the upper electric telescopic rod 243 extends outward, driving the cross plate 244, the connecting rod 245, and the pressing plate 246 to move downward. The pressing plate 246 moves downward into the positioning groove to clamp and limit the position of the positioning plate 242. At the same time, the lower end of the pressing plate 246 presses against the upper part of the reinforcing rib 4. The structure of the trapezoidal groove cooperates with the reinforcing rib 4, and can also limit the front and rear directions of the reinforcing rib 4 to a certain extent, improving the stability of the fixing of the reinforcing rib 4.After the reinforcing rib 4 is fixed, the telescopic cylinder 251 is extended outward, driving the supporting telescopic rods 252 on both sides to extend outward synchronously, so that the displacement box 253 is close to the welding position. After moving to the welding position, the rotating motor 2511 is started to drive the two bidirectional threaded rods 2510 to rotate synchronously through the pulley group 2512, so that the upper and lower corresponding linkage blocks 2513 move toward each other. When the multiple convex plates 2517 and the extrusion springs 2518 cooperate, the linkage blocks 2513 move and drive the corresponding sliding long blocks 258 to move synchronously, thereby The welding head 2520 and the clamping plate 2516 are driven to approach the position of the door inner panel 3. During the movement, the clamping plate 2516 first contacts the reinforcing rib 4 and the door inner panel 3, and then continues to move to squeeze the spring telescopic rod 2515. After that, the welding head 2520 also conflicts with the corresponding reinforcing rib 4 and the door inner panel 3. The linkage block 2513 continues to drive the clamping plate 2516 to move downward to further squeeze the spring telescopic rod 2515. At this time, the welding head 2520 cannot move further, and the connecting strip 2514 slides in the vertical through hole 2519. At the same time, the convex plate 2517 compresses the extrusion spring 2518, and further elastically compresses the welding head 2520 through the force of the extrusion spring 2518 to ensure the clamping force of the welding head 2520, and compresses the two sides of the welding point of the reinforcing rib 4 and the door inner panel 3 up and down through the clamping plate 2516 to ensure that the reinforcing rib 4 and the door inner panel 3 are fully compressed and contacted, the gap is reduced, and the welding stability is improved; when the welding of this welding point is completed, the clamping plate 2516 and the welding head 2520 return to the original position, and the intermittent rotating motor 255 is started to drive the transverse screw 254 to rotate forward to drive The mounting frame 256 moves to the left to the next position to be welded, and repeats the above operation to perform spot welding in sequence. When spot welding is performed on the next position, the clamping plate 2516 can continuously press and hold the previous spot welding position up and down, and repeat this process. When all spot welding is completed on the rear side of the reinforcing rib 4, the telescopic cylinder 251 extends outward for a distance, so that the clamping plate 2516 and the welding head 2520 move to the front side of the reinforcing rib 4, and the intermittent rotating motor 255 drives the transverse screw 254 to reverse and perform spot welding on the front side of the reinforcing rib 4 in sequence to the right. ;

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0039] 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 robot for automobile parts, comprising a fixed conveying mechanism (1) and a positioning welding mechanism (2), characterized in that: The fixed conveying mechanism (1) is placed on the ground, and a positioning and welding mechanism (2) is arranged at the rear of the fixed conveying mechanism (1); The fixed conveying mechanism (1) includes a conveyor (11). A front baffle (12) is installed on the front side of the conveyor (11), and a rear baffle (13) is installed on the rear side of the conveyor (11). The middle part of the rear baffle (13) is a stepped plate structure with the left side lower and the right side higher. A cleaning component (14) for cleaning the welding position is arranged at the right side position of the rear baffle (13). A clamping edge component (15) for flexibly fixing the inner door panel (3) is installed on the conveyor (11) in a detachable manner; The positioning and welding mechanism (2) includes a mounting base (21). The mounting base (21) is arranged on the ground. A sliding track (22) is opened on the upper end surface of the mounting base (21). A sliding pillar (23) is slidably installed in the sliding track (22). A limiting component (24) for positioning and fixing the reinforcing rib (4) is installed at the upper end of the sliding pillar (23). A spot welding component (25) for welding and fixing the inner door panel (3) and the reinforcing rib (4) is arranged on the limiting component (24).

2. The automotive parts spot welding robot according to claim 1, characterized in that: The cleaning component (14) includes a U-shaped plate (141). The U-shaped plate (141) is arranged with an opening facing forward. Brush hairs (142) are uniformly arranged at the upper and lower ends inside the U-shaped plate (141). The brush hairs (142) at the upper and lower positions are arranged in a staggered manner up and down. Suction holes (143) are uniformly opened at the positions between the brush hairs (142) at the upper and lower ends inside the U-shaped plate (141). A storage box (144) is detachably arranged at the position corresponding to the rear end face of the rear baffle (13). An air suction pump is installed on the storage box (144). All the suction holes (143) are communicated with the storage box (144).

3. The automotive parts spot welding robot according to claim 1, characterized in that: The clamping edge component (15) includes a fixed frame (151). Clamping plates (152) are symmetrically installed on the upper and lower inner walls of the upper part of the fixed frame (151). An air bag (153) is installed on the lower end face of the upper clamping plate (152). A plurality of rollers (154) are rotatably embedded at the positions between the two clamping plates (152) on the left and right inner walls of the fixed frame (151).

4. The automotive parts spot welding robot according to claim 3, characterized in that: Both the fixed frame (151) and the clamping plate (152) are U-shaped structures with openings facing backward. Semi-circular protrusions (155) are arranged in the middle of the outer end faces of the fixed frames (151). Positioning groups are uniformly arranged on the conveyor belt of the conveyor (11).

5. The automotive parts spot welding robot according to claim 4, characterized in that: The positioning group is a plurality of positioning blocks (156) corresponding to the positions of the semi-circular protrusions (155) of the fixed frame (151). Semi-circular grooves matched with the semi-circular protrusions (155) of the fixed frame (151) are opened on the positioning blocks (156).

6. The automotive parts spot welding robot according to claim 1, characterized in that: The limiting component (24) includes an L-shaped frame (241). The bottom of the vertical section of the L-shaped frame (241) is installed on the sliding support column (23). On the end face of the vertical section of the L-shaped frame (241) near the clamping group, positioning plates (242) are symmetrically installed on the left and right. An electric telescopic rod (243) is installed on the lower end face of the horizontal section of the L-shaped frame (241). A cross plate (244) is installed at the telescopic end of the electric telescopic rod (243). Connecting rods (245) are installed at positions near the left and right sides of the lower end face of the cross plate (244). A pressing plate (246) is jointly installed at the lower ends of the two connecting rods (245). A trapezoidal groove is formed at the position between the two connecting rods (245) at the lower end of the pressing plate (246). A stabilizing rib (247) is arranged between the connecting rod (245) and the pressing plate (246).

7. The automotive parts spot welding robot according to claim 5, characterized in that: A clamping long hole is formed in the front part of the positioning plate (242). Stopping blocks (248) are installed on the opposite front faces of the two positioning plates (242). A positioning groove is formed at the position corresponding to the upper end face of the positioning plate (242) and the pressing plate (246). A support rod (249) is jointly connected to the lower end faces of the front parts of the two positioning plates (242).

8. The automotive parts spot welding robot according to claim 7, characterized in that: The spot welding component (25) includes a telescopic cylinder (251). The telescopic cylinder (251) is embedded and installed at the middle position between the two positioning plates (242) on the vertical section of the L-shaped frame (241). Support telescopic rods (252) are embedded and installed on the left and right sides of the telescopic cylinder (251). A displacement box (253) is jointly installed on the telescopic ends of the telescopic cylinder (251) and the support telescopic rods (252). An installation groove is formed in the middle of the front end of the displacement box (253). A transverse screw rod (254) is rotatably installed in the installation groove. One end of the transverse screw rod (254) extends outside the displacement box (253). An intermittent rotation motor (255) is installed on the displacement box (253) through a motor base. The output shaft of the intermittent rotation motor (255) is connected to the transverse screw rod (254) extending outside the displacement box (253). An installation frame (256) is threadedly connected to the transverse screw rod (254). The installation frame (256) is in a U-shaped structure with an opening facing forward.

9. The automotive parts spot welding robot according to claim 8, characterized in that: A limiting groove (257) is vertically provided on the front end surface of the vertical section of the mounting frame (256), and two sliding long blocks (258) are symmetrically arranged in the limiting groove (257) for sliding upward and downward movement. A welding head (2520) is installed on the opposite front sides of the two sliding long blocks (258). The mounting frame (256) is provided with linkage grooves (259) at the positions on the left and right sides of the limiting groove (257), and bidirectional threaded rods (2510) are rotatably installed in the linkage grooves (259), and the upper ends of the bidirectional threaded rods (2510) extend outside the mounting frame (256). The rotating motor (2511) is installed on the mounting frame (256) through a motor seat, and one of the bidirectional threaded rods (2511) is provided with a rotating motor (2511). The upper end of the threaded rod (2510) is connected to the output shaft of the rotating motor (2511), and the outer walls of the two bidirectional threaded rods (2510) extending outside the mounting frame (256) are connected through a pulley set (2512). The outer walls of the bidirectional threaded rods (2510) are symmetrically threaded with linkage blocks (2513) in upper and lower directions, and the opposite surfaces of the left and right adjacent linkage blocks (2513) are evenly provided with a plurality of connecting strips (2514) from front to back. The side end surface of the sliding long block (258) and the corresponding position of the connecting rod (245) are both provided with vertical through holes (2519), and the middle part of the connecting strip (2514) is slidably arranged in the vertical through hole (2519) up and down.

10. The automotive parts spot welding robot according to claim 9, characterized in that: The upper and lower opposite surfaces of the linkage block (2513) are both installed with spring telescopic rods (2515) at positions corresponding to the welding head (2520); the telescopic end of the spring telescopic rod (2515) is installed with a clamping plate (2516); the length of the welding head (2520) is smaller than the length of the spring telescopic rod (2515); a plurality of convex plates (2517) arranged from front to back are commonly installed on two adjacent linkage blocks (2513) on the left and right; the convex positions of the convex plates (2517) are both installed with extrusion springs (2518); the other end of the extrusion spring (2518) is installed on the sliding long block (258).

Images