Automatic welding device for light axle housing rear cover

Abstract

The invention relates to the field of automobile part machining, and discloses an automatic welding device for a light automobile axle housing rear cover, a first roller conveyor is arranged to convey an axle housing main body and a rear cover which are connected together through spot welding, so that the axle housing main body enters a position on a bearing plate to stop conveying; then, a jacking air cylinder stretches to drive a lifting plate, a rotating shaft and a bearing plate to vertically ascend along a sliding rod to jack up the axle housing main body workpiece till a rear cover is tightly attached to the concave position of a fixing block, then a micro motor drives a second gear to rotate, and therefore a first gear, the rotating shaft and the bearing plate are driven to rotate for welding work, and people do not need to rotate around the axle housing main body for welding; after external welding is completed, the micro motor stops rotating, the bearing plate is made to be distributed in an original cross shape, the jacking air cylinder shrinks to drive the bearing plate to return to the original position, and at the moment, the first roller conveyor is started to convey the workpiece to the overturning station. The device has the advantages and effects that automatic overturning of the axle housing is achieved, manual rotating ring welding is not needed, and welding is rapid and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts processing, in particular to an automatic welding device for a rear cover of a light vehicle axle housing. Background Art

[0002] The axle housing is the assembly base for installing the main reducer, differential, half-axles and wheels on the vehicle. It is an important component of the drive axle and one of the main components of the running system. The axle housing of an ordinary non-disconnecting drive axle is a rigid hollow beam supported on the left and right drive wheels. The cavity in the middle of the axle housing is used to install various components. One side of the cavity is provided with a pipa hole for users to assemble and repair components, and the other side is provided with a rear cover to close the cavity.

[0003] Since the bridge housing needs to reasonably install multiple components, the appearance of the bridge housing is usually complex and changeable. The bridge housing and the rear cover are not suitable for integrated production. When producing the bridge housing, welding is usually selected to connect the bridge housing and the rear cover. When welding, the outside of the connection between the bridge housing and the rear cover is first spot-welded, then the entire outside is welded, and finally the inside is welded. However, the existing technology generally hoists the spot-welded workpiece to the respective workstations of external welding and internal welding, and then manually rotates the workpiece for welding. The manual labor is large, and the workpiece needs to be manually flipped and hoisted between internal welding and external welding, resulting in low welding efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic welding device for the rear cover of a light vehicle axle housing, which can solve the above technical problems, realize automatic flipping of the axle housing, eliminate the need for manual circle welding, and achieve fast and efficient welding.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic welding device for a rear cover of a light vehicle axle housing, comprising a bracket, a first roller conveyor is provided on the bracket, the first roller conveyor comprises a first conveying roller, a cross-shaped accommodating space is formed in the middle of the plurality of first conveying rollers, a cross-shaped carrying plate is provided in the accommodating space, a lifting plate is provided below the first conveying roller, sliding rods are fixedly provided at four right angles at the bottom of the lifting plate, a rotating shaft is provided for rotation in the middle, the rotating shaft is fixedly connected to the cross-shaped carrying plate, the bracket comprises a connecting plate, a lifting cylinder is symmetrically provided in the middle of the connecting plate, the piston rod of the lifting cylinder is fixedly connected to the lifting plate, the sliding rod is slidably connected to the connecting plate, a gear 1 is fixedly provided on the outer wall of the rotating shaft, a micro motor is fixedly provided on the lifting plate, a gear 2 is fixedly provided at the output end of the micro motor, and the gear 2 is meshed with the gear 1;

[0006] The jacking device includes a U-shaped frame located on both sides of the bracket, a crossbar is connected between the U-shaped frames, a fixed block is rotatably provided on the crossbar, the bottom of the fixed block is concave and adapted to the bottom of the rear cover, and the piston rod of the jacking cylinder is extended and abuts against the rear cover in the fixed block;

[0007] The turning device includes a workbench located at the tail of the first conveying transfer device, with circular rings rotatably provided at the front and rear ends of the workbench, an upper fixed plate is obliquely and symmetrically fixed between the inner walls of the two circular rings, and a lower fixed plate is horizontally provided, a downward pressure cylinder is symmetrically fixed at the front and rear ends of the upper fixed plate, a movable plate is fixed at the end of the downward pressure cylinder, a second roller conveyor is provided on the movable plate, and the two second roller conveyors are symmetrically arranged in a V shape, a side of the lower fixed plate close to the second roller conveyor is symmetrically provided with straight triangular prisms, and the inclined surfaces of the two straight triangular prisms are arranged oppositely to limit the bridge housing body, and an internal welding device is provided on the rear side of the turning device;

[0008] The driving device includes a stepping motor, a gear 3 is fixedly provided at the output end of the stepping motor, a rack is fixedly provided on the outer wall of the ring, and the gear and the rack are meshed and connected;

[0009] By adopting the above technical solution, a first roller conveyor is set to convey the bridge housing body and the rear cover that have been spot-welded together, so that the bridge housing body enters the position on the carrying plate and stops conveying, and then the lifting cylinder extends to drive the lifting plate, the rotating shaft, and the carrying plate to rise vertically along the sliding rod to lift the bridge housing body workpiece until the rear cover is close to the recessed position of the fixed block, and then the micro motor drives the gear 2 to rotate, thereby driving the gear 1, the rotating shaft, and the carrying plate to rotate for welding. There is no need for people to rotate around the bridge housing body for welding, which saves manpower and has high welding efficiency. Since the rear cover abuts against the recessed position of the fixed block, it can also ensure that there is no welding seam at the welding point, thereby improving the welding quality; after the external welding is completed, the micro motor stops rotating, and makes the carrying plate assume the original cross-shaped distribution, and the lifting cylinder contracts to drive the carrying plate to return to its original position. At this time, the first roller conveyor is started to convey the workpiece to the flipping station;

[0010] By providing a turning device, the first roller conveyor conveys the workpiece to the lower fixed plate. Before turning over, the two inclined surfaces of the right triangular prism are opposite to each other, so that the workpiece will not be deflected during vertical conveying. Even if there is a tendency to deflect, it will be blocked by the inclined surface and restored to its original position. The workpiece position can be always located in the middle of the lower fixed plate without manual adjustment, thus avoiding skewed workpiece transportation and improving welding efficiency. The piston rod of the downward pressure cylinder is extended to drive the second roller conveyor to move downward, limiting the workpiece in the limited space between the right triangular prism and the second roller conveyor and fixing it to achieve stable turning. The stepper motor drives the workpiece to rotate vertically. The movable ring rotates 180 degrees to flip the workpiece. The flipped workpiece is placed on the second roller conveyor. Starting the second roller conveyor can steadily convey it forward to the inner welding station, so that the bridge housing body that has completed external welding can be automatically flipped, further improving the overall welding efficiency. Since the parameters of the rear cover on the bridge housing body of different car models are different, the extension and contraction of the cylinder piston rod can be adjusted when the flipping is completed to drive the bridge housing body to move up and down, so that the second roller conveyor can smoothly convey the workpiece to the subsequent inner welding station, which can adapt to the flipping of various models of bridge housing rear covers.

[0011] The present invention is further configured such that the internal welding device includes a mounting plate, a column is provided on the mounting plate, a U-shaped frame 2 is rotatably provided between the two columns, a steering motor is provided on the outside, the output end of the steering motor is fixedly connected to the U-shaped frame 2, a carrying plate is fixedly provided in the middle of the U-shaped frame 2, a rotating base is rotatably provided in the middle of the carrying plate, and a rotating motor is fixedly provided at the bottom, the rotating motor is used to drive the rotating base to rotate and a steering rod is provided on the rotating base, a rear cover accommodating groove is provided in the middle of the steering rod, clamping components are provided at both ends, an internal welding robotic arm is provided behind the column, and an internal welding welding joint is provided at the tail end of the internal welding robotic arm.

[0012] By adopting the above technical solution, when the flipping is completed, the U-shaped frame 2 is in a vertical state, and the rotating motor is driven to drive the rotating base and the steering rod to rotate 90 degrees, so that the steering rod is located on the extension line of the second roller conveyor. At this time, a tower crane is used to assist in transferring the workpiece through the clamping components to the rotating rod until the rear cover is located in the rear cover accommodating groove. The clamping component clamps the workpiece, and the rotating motor drives the steering rod to reset. Then, the steering motor is adjusted to rotate the U-shaped frame 2 so that the rear cover opening of the workpiece is aligned with the internal welding joint, and the internal welding joint is adjusted to enter the interior of the rear cover for welding. Finally, the rotating motor is started to rotate one circle to complete the internal welding work, realize the automation of the internal welding process, and improve welding efficiency.

[0013] The present invention is further configured as follows: the clamping assembly includes a bidirectional screw rod rotatably connected to the steering rod, the two ends of the bidirectional screw rod rotate in opposite directions and are both threadedly connected to a moving block, a clamping plate is fixed on the top of the moving block, and the clamping plate is provided with an arc-shaped clamping groove for clamping the bridge housing body.

[0014] By adopting the above technical solution, the two moving blocks are driven to move away from or closer to each other by rotating the bidirectional screw. When they move away from each other, the bridge housing body is loosened. When they move closer to each other, the bridge housing body is clamped in the arc-shaped clamping groove to limit the workpiece, ensuring the relative stability and safety of the rear cover and the internal welding joint during internal welding, thereby facilitating internal welding work.

[0015] The present invention is further configured as follows: when the turning rod is placed horizontally, the height of the turning rod is equal to the height of the rollers of the second roller conveyor.

[0016] By adopting the above technical solution, it is ensured that the second roller conveyor can stably convey the workpiece onto the turning rod during transportation.

[0017] The present invention is further configured to include an external welding device, the external welding device includes an external welding robot arm, and an external welding joint is provided at the tail end of the external welding robot arm.

[0018] By adopting the above technical solution, the external welding joint is installed on the external welding robot arm to realize automated external welding and improve welding efficiency and accuracy.

[0019] The present invention is further configured such that the center lines of the two right triangular prisms coincide with the center lines of the two second roller conveyors.

[0020] By adopting the above technical solution, it is ensured that the workpiece is stably fixed between the right triangular prism and the second roller conveyor.

[0021] The present invention is further configured as follows: the bearing plate comprises a long vertical plate and a short horizontal plate; limiting plates are symmetrically provided on both sides of the long vertical plate, and the limiting plates are arranged to tilt upward toward the outside.

[0022] By adopting the above technical solution, the limit plate is set at an angle, so that the workpiece will not be deflected when it is transported vertically on the limit plate. Even if there is a tendency to deflect, it will be blocked by the inclined surface of the top of the limit plate and restored to its original position. There is no need to manually adjust the position of the workpiece, so that the workpiece can always be located on the long vertical plate of the load-bearing plate and will not roll off, which makes it convenient for the subsequent lifting cylinder to lift it up and the rear cover and the recessed part of the fixed block to abut against each other, further improving the welding efficiency and ensuring the welding safety.

[0023] The present invention is further configured as follows: four support columns are provided on the workbench, a rotating wheel is fixedly provided on the top of the support columns, and the outer wall of the circular ring is rotatably connected to the rotating wheel.

[0024] By adopting the above technical solution, the rotation support of the ring is achieved.

[0025] The present invention is further configured such that the distance between the two rings is smaller than the length of the axle housing body.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present application arranges a first roller conveyor to transport the bridge housing body and the rear cover that have been spot-welded together, so that the bridge housing body enters the position on the carrying plate and stops transporting, and then the lifting cylinder extends to drive the lifting plate, the rotating shaft, and the carrying plate to rise vertically along the sliding rod to lift the bridge housing body workpiece until the rear cover is close to the recess of the fixed block, and then the micro motor drives the gear 2 to rotate, thereby driving the gear 1, the rotating shaft, and the carrying plate to rotate for welding. There is no need for people to rotate around the bridge housing body for welding, which saves manpower and has high welding efficiency. Since the rear cover abuts against the recess of the fixed block, it can also ensure that there is no welding seam at the welding point, thereby improving the welding quality; after the external welding is completed, the micro motor stops rotating, and makes the carrying plate assume the original cross-shaped distribution, and the lifting cylinder contracts to drive the carrying plate to return to its original position. At this time, the first roller conveyor is started to transport the workpiece to the flipping station.

[0028] 2. The present application is provided with a flipping device, and the first roller conveyor conveys the workpiece to the lower fixed plate. Before flipping, the two inclined surfaces of the right triangular prism are opposite to each other, so that the workpiece will not be deflected during vertical transportation. Even if there is a tendency to deflect, it will be blocked by the inclined surface and return to its original position. There is no need to manually adjust the position of the workpiece, so that the workpiece can always be located in the middle of the lower fixed plate, avoiding skewed transportation of the workpiece and improving welding efficiency; the piston rod of the downward pressure cylinder is extended to drive the second roller conveyor to move downward, and the workpiece is limited in the limited space between the straight triangular prism and the second roller conveyor and is fixed to achieve stable flipping. The stepper motor drives the ring to rotate 180 degrees to realize the flipping of the workpiece. The flipped workpiece is located on the second roller conveyor. Starting the second roller conveyor can continue to transport it forward stably to the inner welding station, so that the bridge shell body after external welding can be automatically flipped, further improving the overall welding efficiency.

[0029] 3. Since the parameters of the rear cover on the axle housing body of different car models are different, the extension and contraction of the cylinder piston rod can be adjusted to drive the axle housing body to move up and down after the flipping is completed, so that the second roller conveyor can smoothly transport the workpiece to the subsequent internal welding station, which can adapt to the flipping of various models of axle housing rear covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 This invention Figure 1 Partial schematic diagram of AA.

[0033] Figure 3 Schematic diagram of the carrier plate of the present invention.

[0034] Figure 4 It is a schematic diagram of the supporting plate of the present invention from another angle.

[0035] Figure 5 It is a schematic diagram of the turning device of the present invention after turning over.

[0036] Figure 6 It is a schematic diagram of the turning device of the present invention before turning over.

[0037] In the figure, 1, bracket; 100, connecting plate; 2, first roller conveyor; 200, first conveyor roller; 3, carrying plate; 300, long vertical plate; 301, short horizontal plate; 302, limit plate; 4, lifting plate; 5, sliding rod; 6, rotating shaft; 7, lifting cylinder; 8, gear 1; 9, micro motor; 900, gear 2; 10, pressing device; 1001, U-shaped frame 1; 1002, cross bar; 1003, fixed block; 11, turning device; 1101, workbench; 1102, ring; 1103, upper fixed plate; 1104, lower fixed plate; 1105, pressing cylinder; 1106, moving plate; 1107, second roller conveyor; 1108, right triangular prism; 1109, support column; 1 110. Rotating wheel; 12. Internal welding device; 1201. Mounting plate; 1202. Column; 1203. U-shaped frame 2; 1204. Steering motor; 1205. Carrying plate; 1206. Rotating base; 1207. Rotating motor; 1208. Steering rod; 1209. Rear cover receiving slot; 1210. Internal welding robot arm; 1211. Internal welding joint; 13. Driving device; 1301. Stepping motor; 1302. Gear 3; 1303. Rack; 14. Clamping assembly; 1401. Bidirectional screw; 1402. Moving block; 1403. Clamping plate; 1404. Arc-shaped clamping slot; 15. External welding device; 1501. External welding robot arm; 1502. External welding joint; 16. Bridge housing body. DETAILED DESCRIPTION

[0038] The technical solutions of the present invention will be described clearly and completely below with reference to specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0039] Embodiment, an automatic welding device for a light vehicle axle housing rear cover, such as Figures 1-6 As shown, it includes a bracket 1, on which a first roller conveyor 2 is provided, the first roller conveyor 2 includes a first conveying roller 200, a cross-shaped accommodating space is formed in the middle of the multiple first conveying rollers 200, a cross-shaped carrying plate 3 is provided in the accommodating space, a lifting plate 4 is provided below the first conveying roller 200, four right angles of the bottom of the lifting plate 4 are fixed with sliding rods 5, a rotating shaft 6 is provided in the middle, the rotating shaft 6 is fixedly connected to the cross-shaped carrying plate 3, the bracket 1 includes a connecting plate 100, a lifting cylinder 7 is symmetrically provided in the middle of the connecting plate 100, the piston rod of the lifting cylinder 7 is fixedly connected to the lifting plate 4, the sliding rod 5 is slidably connected to the connecting plate 100, a gear 1 8 is fixed on the outer wall of the rotating shaft 6, a micro motor 9 is fixed on the lifting plate 4, a gear 2 900 is coaxially fixed to the output end of the micro motor 9, and the gear 2 900 is meshed with the gear 1 8;

[0040] The jacking device 10 comprises a U-shaped frame 1001 located on both sides of the bracket 1, a crossbar 1002 is connected between the U-shaped frame 1001, a fixed block 1003 is rotatably provided on the crossbar 1002, the bottom of the fixed block 1003 is concave and adapted to the bottom of the rear cover, and when the piston rod of the jacking cylinder (7) is extended, the rear cover is abutted against the fixed block 1003;

[0041] The turning device 11 includes a workbench 1101 located at the tail of the first conveying device, with circular rings 1102 rotatably provided at the front and rear ends of the workbench 1101, an upper fixed plate 1103 is fixedly and obliquely symmetrically with the inner walls of the two circular rings 1102, and a lower fixed plate 1104 is fixedly provided horizontally, a downward pressure cylinder 1105 is symmetrically fixedly provided at the front and rear ends of the upper fixed plate 1103, a movable plate 1106 is fixedly provided at the end of the downward pressure cylinder 1105, a second roller conveyor 1107 is provided on the movable plate 1106, and the two second roller conveyors are symmetrically arranged in a V shape, and a straight triangular prism 1108 is symmetrically provided on one side of the lower fixed plate 1104 close to the second roller conveyor 1107, and the inclined surfaces of the two straight triangular prisms 1108 are arranged opposite to each other for limiting the bridge housing body 16, and an internal welding device 12 is provided on the rear side of the turning device 11;

[0042] The driving device 13 includes a stepping motor 1301. A gear 3 1302 is fixedly provided at the output end of the stepping motor 1301. A rack 1303 is fixedly provided on the outer wall of the ring 1102. The gear and the rack 1303 are meshed and connected.

[0043] The internal welding device 12 includes a mounting plate 1201, on which a column 1202 is provided, a U-shaped frame 1203 is rotatably provided between the two columns 1202, a steering motor 1204 is provided on the outside, an output end of the steering motor 1204 is fixedly connected to the U-shaped frame 1203, a carrying plate 1205 is fixedly provided in the middle of the U-shaped frame 1203, a rotating base 1206 is rotatably provided in the middle of the carrying plate 1205, and a rotating motor 1207 is fixedly provided at the bottom, the rotating motor 1207 is used to drive the rotating base 1206 to rotate, and a steering rod 1208 is provided on the rotating base 1206, a rear cover receiving groove 1209 is provided in the middle of the steering rod 1208, and clamping assemblies 14 are provided at both ends, an internal welding robot arm 1210 is provided behind the column 1202, and an internal welding welding joint 1211 is provided at the tail end of the internal welding robot arm 1210;

[0044] The clamping assembly 14 includes a bidirectional screw rod 1401 rotatably connected to the steering rod 1208. The two ends of the bidirectional screw rod 1401 rotate in opposite directions and are both threadedly connected to a moving block 1402. A clamping plate 1403 is fixed to the top of the moving block 1402. The clamping plate 1403 has an arc-shaped clamping groove 1404 for clamping the axle housing body 16.

[0045] When the turning rod 1208 is laid flat, it is at the same height as the rollers of the second roller conveyor 1107 .

[0046] The external welding device 15 includes an external welding robot arm 1501 , and an external welding joint 1502 is provided at the tail end of the external welding robot arm 1501 .

[0047] The center lines of the two right triangular prisms 1108 coincide with the center lines of the two second roller conveyors 1107 .

[0048] The supporting plate 3 includes a long vertical plate 300 and a short horizontal plate 301 . Limiting plates 302 are symmetrically provided on both sides of the long vertical plate 300 . The limiting plates 302 are arranged to be tilted upward toward the outside.

[0049] Specifically, four support columns 1109 are provided on the workbench 1101 , and a rotating wheel 1110 is fixedly provided on the top of the support columns 1109 . The outer wall of the ring 1102 is rotatably connected to the rotating wheel 1110 .

[0050] Specifically, the distance between the two rings 1102 is smaller than the length of the axle housing body 16 .

[0051] Its working principle is: First, external welding work: start the first roller conveyor 2 to convey the bridge housing body 16 and the rear cover that have been spot-welded together, so that the bridge housing body 16 enters the position on the bearing plate 3 and stops conveying. Due to the inclined setting of the limit plate 302, the workpiece will not be deflected when it is conveyed vertically on the limit plate 302. Even if there is a deflection trend, it will be blocked by the top inclined surface of the limit plate 302 to restore to its original position. There is no need to manually adjust the position of the workpiece, so that the workpiece can always be located on the long vertical plate 300 of the bearing plate 3 and will not roll down, which is convenient for the subsequent lifting cylinder 7 to lift it up and the rear cover will just abut against the fixed block 1003. Start the lifting cylinder 7 to stretch and drive the lifting plate 4, the rotating shaft 6, and the bearing The plate 3 rises vertically along the sliding rod 5 to lift the bridge housing body 16 workpiece until the rear cover is close to the recess of the fixed block 1003. Then the micro motor 9 drives the gear 2 900 to rotate, thereby driving the gear 1 8, the rotating shaft 6, and the bearing plate 3 to rotate for welding. The external welding work is performed using the external welding welding head 1502 on the external welding robot arm 1501. There is no need for people to rotate around the bridge housing body 16 for welding, which saves manpower and has high welding efficiency. Since the rear cover abuts the recess of the fixed block 1003, it can also ensure that there is no welding seam at the welding point, thereby improving the welding quality. After the external welding is completed, the micro motor 9 stops rotating, and the bearing plate 3 is distributed in the original cross shape. The lifting cylinder 7 contracts to drive the bearing plate 3 to return to its original position.

[0052] Secondly, the flipping operation: the first roller conveyor 2 continues to convey the workpiece to between the two inclined surfaces of the straight triangular prism 1108 on the lower fixed plate 1104, so that the workpiece will not be deflected during horizontal and vertical conveyance. Even if there is a tendency to deflect, it will be blocked by the inclined surface and restored to its original position. The workpiece position can be kept in the middle of the lower fixed plate 1104 without manual adjustment, thus avoiding skewed conveyance of the workpiece. Then, the piston rod of the downward-pressing cylinder 1105 is extended to drive the second roller conveyor 1107 to move downward, limiting the workpiece to the position of the straight triangular prism 1108. The workpiece is fixed in the limited space between the second roller conveyor 1107 and the second roller conveyor 1107 to achieve stable flipping. The stepper motor 1301 drives the ring 1102 to rotate 180 degrees to flip the workpiece. The flipped workpiece is located on the second roller conveyor 1107. The extension and contraction of the cylinder piston rod is adjusted to drive the bridge housing body 16 to move up and down until the bottom of the workpiece on the second roller conveyor 1107 is flush with the bottom of the horizontal steering rod 1208. The second roller conveyor 1107 is started and the workpiece is transferred to the inner welding station with the help of a tower crane.

[0053] Finally, the internal welding work: when the flip is completed, the U-shaped frame 1203 is in a vertical state, and the rotating motor 1207 is driven to drive the rotating base 1206 and the steering rod 1208 to rotate 90 degrees, so that the steering rod 1208 is located on the extension line of the second roller conveyor 1105. At this time, the tower crane is used to assist in transferring the workpiece through the clamping components 14 to the rotating rod until the rear cover is located in the rear cover receiving groove 1209. The two-way screw rod 1401 is rotated to drive the two moving blocks 1402 to move closer to each other to clamp the bridge housing body 16. The workpiece is limited in the arc-shaped clamping groove 1404 to ensure the relative stability and safety of the rear cover and the internal welding joint during internal welding, which facilitates the internal welding work. The rotating motor 1207 drives the steering rod 1208 to reset, and then the steering motor 1204 is adjusted to mobilize the U-shaped frame 1203 to rotate, so that the opening of the rear cover of the workpiece is aligned with the internal welding joint, and the internal welding joint is adjusted to enter the interior of the rear cover for welding. Finally, the rotating motor 1207 is started to rotate one circle to complete the internal welding work, realize the automation of the internal welding process, and improve welding efficiency.

Claims

1. An automatic welding device for a light vehicle axle housing rear cover, characterized by: The invention comprises a bracket (1), wherein a first roller conveyor (2) is provided on the bracket (1), wherein the first roller conveyor (2) comprises a first conveying roller (200), wherein a plurality of the first conveying rollers (200) form a cross-shaped accommodation space in the middle, wherein a cross-shaped bearing plate (3) is provided in the accommodation space, and a lifting plate (4) is provided below the first conveying roller (200), wherein sliding rods (5) are fixed at four right angles at the bottom of the lifting plate (4), and a rotating shaft (6) is provided in the middle for rotation, wherein the rotating shaft (6) is fixedly connected to the cross-shaped bearing plate The plate (3) is provided with a support (1) and a connecting plate (100). A lifting cylinder (7) is symmetrically provided on the middle portion of the connecting plate (100). The piston rod of the lifting cylinder (7) is fixedly connected to the lifting plate (4). The sliding rod (5) is slidably connected to the connecting plate (100). A gear 1 (8) is fixedly provided on the outer wall of the rotating shaft (6). A micro motor (9) is fixedly provided on the lifting plate (4). A gear 2 (900) is fixedly provided on the output end of the micro motor (9). The gear 2 (900) is meshed with the gear 1 (8). The jacking device (10) comprises a U-shaped frame (1001) located on both sides of the bracket (1), a crossbar (1002) being connected between the U-shaped frame (1001), a fixed block (1003) being rotatably provided on the crossbar (1002), the bottom of the fixed block (1003) being concave and adapted to the bottom of the rear cover, and the rear cover being abutted against the fixed block (1003) when the piston rod of the jacking cylinder (7) is extended; The turning device (11) comprises a workbench (1101) located at the tail of the first conveying device, wherein the workbench (1101) is provided with a circular ring (1102) at both ends thereof for rotation, an upper fixed plate (1103) is fixedly provided obliquely and symmetrically between the inner walls of the two circular rings (1102), and a lower fixed plate (1104) is fixedly provided horizontally, and a downward pressure cylinder (1105) is fixedly provided symmetrically at both ends thereof, and a movable plate ( 1106), a second roller conveyor (1107) is provided on the movable plate (1106), and the two second roller conveyors (1107) are symmetrically arranged in a V shape. A straight triangular prism (1108) is symmetrically provided on one side of the lower fixed plate (1104) close to the second roller conveyor (1107), and the slope surfaces of the two straight triangular prisms (1108) are arranged oppositely to limit the position of the bridge housing body (16). An internal welding device (12) is provided on the rear side of the turning device (11); The driving device (13) comprises a stepping motor (1301), wherein a gear 3 (1302) is fixedly provided at the output end of the stepping motor (1301), a rack (1303) is fixedly provided on the outer wall of the ring (1102), and the gear is meshedly connected with the rack (1303).

2. The automatic welding device for a light vehicle axle housing rear cover according to claim 1, characterized in that: The internal welding device (12) comprises a mounting plate (1201), a column (1202) is provided on the mounting plate (1201), a U-shaped frame (1203) is rotatably provided between the two columns (1202), a steering motor (1204) is provided on the outside, an output end of the steering motor (1204) is fixedly connected to the U-shaped frame (1203), a bearing plate (1205) is fixedly provided in the middle of the U-shaped frame (1203), and a rotating base (120 6) A rotating motor (1207) is fixedly provided at the bottom, and the rotating motor (1207) is used to drive the rotating base (1206) to rotate. The rotating base (1206) is provided with a steering rod (1208), the middle of the steering rod (1208) is provided with a rear cover receiving groove (1209), and both ends are provided with clamping components (14). An internal welding mechanical arm (1210) is provided behind the column (1202), and the tail end of the internal welding mechanical arm (1210) is provided with an internal welding joint (1211).

3. The automatic welding device for a light vehicle axle housing rear cover according to claim 2, characterized in that: The clamping assembly (14) includes a bidirectional screw rod (1401) rotatably connected to a steering rod (1208), the two ends of the bidirectional screw rod (1401) rotate in opposite directions and are both threadedly connected to a moving block (1402), a clamping plate (1403) is fixed on the top of the moving block (1402), and the clamping plate (1403) is provided with an arc-shaped clamping groove (1404) for clamping the bridge housing body (16).

4. The automatic welding device for a light vehicle axle housing rear cover according to claim 2, characterized in that: When the turning rod (1208) is laid flat, the height thereof is equal to that of the rollers of the second roller conveyor (1107).

5. The automatic welding device for a light vehicle axle housing rear cover according to claim 1, characterized in that: It also includes an external welding device (15), the external welding device (15) includes an external welding robot arm (1501), and the tail end of the external welding robot arm (1501) is provided with an external welding joint (1502).

6. The automatic welding device for a light vehicle axle housing rear cover according to claim 1, characterized in that: The center lines of the two right triangular prisms (1108) coincide with the center lines of the two second roller conveyors (1107).

7. The automatic welding device for a light vehicle axle housing rear cover according to claim 1, characterized in that: The bearing plate (3) comprises a long vertical plate (300) and a short horizontal plate (301), and limiting plates (302) are symmetrically provided on both sides of the long vertical plate (300), and the limiting plates (302) are arranged to tilt upward toward the outside.

8. The automatic welding device for a light vehicle axle housing rear cover according to claim 1, characterized in that: Four support columns (1109) are provided on the workbench (1101), a rotating wheel (1110) is fixedly provided on the top of the support columns (1109), and the outer wall of the ring (1102) is rotatably connected to the rotating wheel (1110).

9. The automatic welding device for a light vehicle axle housing rear cover according to claim 1, characterized in that: The distance between the two circular rings (1102) is smaller than the length of the bridge housing body (16).

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