An automatic welding machine and method for powder tank truck fender support tubes

Abstract

The present application relates to the field of pipe welding processing, in particular to a kind of automatic welding machine and method of powder tank truck mudguard support pipe, including chain conveyor, hydraulic press and two automatic welding manipulator, still including pipe conveying assembly, pipe conveying assembly includes to and fro platform, lifting platform, first feeding clamp, special-shaped bracket, turnover horizontal pipe and second feeding clamp, first positioning clamp and second positioning clamp are fixedly arranged respectively in the side of hydraulic press and the two sides of special-shaped bracket, turnover horizontal pipe one end coaxially is provided with turnover disc and five pulleys, limiting guide rail is fixedly arranged between hydraulic press and special-shaped bracket.The present application realizes the automation and sequentially welds several support pipes forward, realizes the synchronous welding of different triangular plate and support pipe different welding position, higher processing efficiency, and only need simple manual operation to place support pipe on carrier block throughout, not too much rely on manpower.

Description

Technical Field

[0001] This invention relates to the field of pipe welding and processing, specifically to an automatic welding machine and method for mudguard support pipes of powder tank trucks. Background Technology

[0002] Mudguards on powder tank trucks are mostly not installed directly onto the vehicle body, but rather secured using support components. One type of mudguard uses a uniquely shaped support tube. This support tube is generally cylindrical, but to accommodate the unique structure of the powder tank truck body, it has a curved section in the middle. This results in the two ends of the support tube being horizontally oriented, one higher than the other. Furthermore, this type of support tube is not directly installed onto the vehicle body to fix the mudguard. Instead, a triangular plate is first welded to one end of the support tube to better secure it to the vehicle body. Before welding the triangular plate to the support tube, a hydraulic press is used to press the triangular plate onto the support tube, causing the center of the flat triangular plate to bulge upwards, forming an upward-convex arc structure to fit the support tube's structure. Finally, the connection between the triangular plate and the support tube is welded for fixation.

[0003] Traditional welding devices for this support tube have the following shortcomings: First, due to the special shape of the support tube, traditional welding devices cannot easily and smoothly transport the support tube to the hydraulic press. During the transport of the support tube, manual assistance is often required to fix it in place. Second, since the triangular plate needs to be pressed onto the support tube before welding its upper and lower sides, existing welding devices typically perform initial spot welding at the upper connection point after pressing the support tube and triangular plate together. Then, they transport the support tube and triangular plate to the next process for complete welding of the upper and lower sides of the triangular plate. This process is cumbersome, with significant separation between pressing and welding the triangular plate, resulting in low processing efficiency. Furthermore, the pressing and welding steps are almost completely separated during transport, causing the welding speed to be much lower than the pressing speed, which affects the finished product rate of the support tube. Therefore, it is necessary to design a new welding device to solve these problems. Summary of the Invention

[0004] Therefore, it is necessary to provide an automatic welding machine and method for mudguard support pipes of powder tank trucks to address the existing technical problems.

[0005] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0006] An automatic welding machine for mudguard support pipes of powder tank trucks includes a horizontally fixed chain conveyor belt, a hydraulic press fixedly mounted at the tail end of the chain conveyor belt, and two automatic welding robots. Several support pipes are transported from the head end to the tail end of the chain conveyor belt. The machine also includes a pipe-carrying assembly mounted at the tail end of the chain conveyor belt. This assembly includes a horizontally positioned reciprocating platform capable of moving back and forth along the forward direction of the chain conveyor belt; a vertically lifting platform mounted on the reciprocating platform near the head end of the chain conveyor belt; a first feeding clamp fixedly mounted on the lifting platform for clamping the corresponding support pipes at the tail end of the chain conveyor belt onto the hydraulic press; a shaped bracket mounted on the reciprocating platform away from the chain conveyor belt; a horizontally axially connected tilting cross tube mounted on the reciprocating platform away from the head end of the chain conveyor belt; and a component fixedly mounted on the tilting cross tube. The upper part is used to clamp the support tube on the hydraulic press onto the irregular bracket. The first positioning clamp and the second positioning clamp for assisting in clamping the corresponding support tube are fixedly installed on the side of the hydraulic press and the sides of the irregular bracket, respectively. The end of the flipping horizontal tube near the hydraulic press is coaxially fixed to a flipping disc. Two pulleys are axially connected to one side of the flipping disc, and three pulleys are axially connected to the other side of the flipping disc. A limiting guide rail for cooperating with the five pulleys and driving the flipping horizontal tube to rotate 180 degrees is fixedly installed between the hydraulic press and the irregular bracket. The triangular plate is fed in from the hydraulic press and pressed by the hydraulic press to the corresponding end of the support tube. Two automatic welding robots are fixedly installed on the side of the hydraulic press and the irregular bracket and weld the triangular plate to the support tube. The irregular bracket can rotate around its lower end and push the support tube to the side of the irregular bracket away from the chain conveyor belt for collection.

[0007] Preferably, two symmetrically arranged slide rails are fixedly installed below the tail end of the chain conveyor belt, and three sliders are fixedly connected to both sides of the bottom of the reciprocating platform. The three sliders on each side are slidably arranged on the corresponding slide rails. A hydraulic cylinder is also fixedly installed below this end of the chain conveyor belt, and the length direction of the output shaft of the hydraulic cylinder is parallel to the length direction of the chain conveyor belt. The output end of the hydraulic cylinder is fixedly connected to the reciprocating platform.

[0008] Preferably, the lifting platform is horizontally positioned above the reciprocating platform, and four evenly distributed limiting vertical shafts are fixedly connected to the lower end of the lifting platform. Each limiting vertical shaft is slidably mounted on the reciprocating platform in a vertical direction. A threaded vertical shaft is fixedly connected to the center of the bottom of the lifting platform. A first shaft seat and a second shaft seat, which are distributed vertically at intervals, are fixedly connected to the reciprocating platform via a first fixed frame and a second fixed frame, respectively. A threaded sleeve is axially mounted on the threaded vertical shaft between the first shaft seat and the second shaft seat, and the threaded vertical shaft is threadedly connected inside the threaded sleeve. A first gear is also coaxially fixedly connected to the outside of the threaded sleeve. A reduction motor with its output shaft pointing vertically upward is also fixedly connected to the reciprocating platform, and a second gear that meshes with the first gear is coaxially fixedly connected to the output shaft of the reduction motor.

[0009] Preferably, the first feeding fixture includes a first gripper, an inclined gripper, and a second gripper arranged sequentially at intervals along the width direction of the chain conveyor belt. The first gripper, the inclined gripper, and the second gripper have the same structure and are all pneumatic fingers. Each pneumatic finger has an arc-shaped clamping plate fixedly connected to its two output ends. The inclined gripper and the second gripper are respectively fixedly mounted on the top of the lifting platform through an inclined bracket and a first bracket.

[0010] Preferably, the second feeding fixture includes two third grippers fixedly disposed at both ends of the tilting horizontal tube and having different heights. The third grippers are Y-shaped pneumatic fingers, and clamping blocks are fixedly connected to both output ends of the Y-shaped pneumatic fingers. A second bracket is fixedly disposed at one end of the reciprocating platform away from the head end of the chain conveyor belt, and the tilting horizontal tube is axially disposed on the second bracket in a horizontal state.

[0011] Preferably, the hydraulic press includes a vertically lifting pressure block and two symmetrically arranged dual-axis cylinders. The lower end of the pressure block has an arc-shaped surface for bending the triangular plate and pressing it against the support tube. The output end of each dual-axis cylinder is vertically upward, and a limiting baffle for limiting the triangular plate is fixedly connected to the output end of each dual-axis cylinder. The top of the limiting baffle has a limiting groove for preventing the triangular plate from moving forward.

[0012] Preferably, the limiting guide rail includes two vertical strips that are vertically positioned and spaced apart along the width of the chain conveyor belt. One of the vertical strips has a first upper protrusion formed on it, and both sides of the first upper protrusion have first lower concave portions formed to avoid the descent of the corresponding two pulleys. The other vertical strip has two second upper protrusions formed on it, and a second lower concave portion that slides between the two second upper protrusions is formed to cooperate with the corresponding pulley. A number of spaced reinforcing ribs are fixedly arranged between the two vertical strips, and the two vertical strips are fixedly mounted on the ground by a fourth fixing frame.

[0013] Preferably, the irregular bracket includes a long curved plate and a short curved plate spaced apart along the width direction of the chain conveyor belt, with the short curved plate located on the side of the long curved plate closer to the hydraulic press. The lower ends of the long curved plate and the short curved plate are fixedly connected to each other by two vertically spaced connecting horizontal shafts. The lower connecting horizontal shaft is mounted on the ground by two shaft seats. A single-axis cylinder is also provided on the side of the lower connecting horizontal shaft closer to the chain conveyor belt. The output shaft of the single-axis cylinder is obliquely upward and hinged to the upper connecting horizontal shaft. The lower end of the single-axis cylinder is hinged to the ground by a hinge seat. The upper ends of both the long curved plate and the short curved plate are formed with an upwardly bent curved plate structure for pushing the support tube.

[0014] A method for using an automatic welding machine for mudguard support pipes of powder tank trucks, the method comprising the following steps:

[0015] S1, the staff places several support tubes one by one on the carrier block at the head end of the chain conveyor belt, and manually pushes the support tubes to the state of contacting the limit plate. During the movement, the chain conveyor belt continuously drives several support tubes to the position detected by the proximity switch, and after the proximity switch detects the support tubes, the chain conveyor belt stops conveying.

[0016] S2, the reciprocating platform moves toward the head end of the chain conveyor belt. When there is a support pipe at the hydraulic press, the first feeding clamp releases the corresponding support pipe. The reciprocating platform, in conjunction with the lifting platform, drives the first feeding clamp to move to the support pipe detected by the proximity switch. The first feeding clamp clamps the corresponding support pipe. At the same time, the reciprocating platform drives the second feeding clamp to move to the hydraulic press. When there is a support pipe with a welded triangular plate at the hydraulic press, the second feeding clamp automatically clamps the support pipe at the hydraulic press, and at the same time, the first positioning clamp releases the support pipe.

[0017] S3, the reciprocating platform moves away from the chain conveyor belt, while the lifting platform moves in coordination to send the support pipe held by the first feeding fixture to the hydraulic press. At the same time, the first positioning fixture clamps the support pipe, and the hydraulic press presses the triangular plate to the corresponding end of the support pipe. Then, the corresponding automatic welding robot welds the corresponding connection between the triangular plate and the support pipe. Before the reciprocating platform moves, if there is already a support pipe with a welded triangular plate at the hydraulic press, while the reciprocating platform moves, the second feeding fixture clamps and moves the corresponding support pipe away from the chain conveyor belt. After rotating the support pipe 180 degrees, the support pipe is sent to the irregular bracket. At the same time, the second positioning fixture clamps the support pipe, and the corresponding automatic welding robot welds the corresponding connection between the triangular plate and the support pipe.

[0018] S4. After the support tube and triangular plate at the irregular bracket are welded, the second feeding fixture and the second positioning fixture release the corresponding support tube. The single-axis cylinder drives the upper end of the irregular bracket to rotate and pushes the support tube down the irregular bracket. Then the output shaft of the single-axis cylinder retracts and drives the irregular bracket back to its original position.

[0019] S5, repeat the steps described in S2 to S4 continuously.

[0020] The beneficial effects of this invention compared to the prior art are:

[0021] Firstly, in this invention, a chain conveyor belt with two conveyor chains of different heights is set up, and a universal coupling is used to drive the two conveyor chains to transmit synchronously. A bottom fixing block is set on the conveyor chain to connect the carrier block, so that the carrier block makes a circular motion with the transport of the conveyor chain, thereby driving the support tube to move horizontally. A proximity switch is set to stop the support tube.

[0022] Secondly, the present invention automatically transfers the support tube at the end of the chain conveyor belt to the hydraulic press through the cooperation of the reciprocating platform, the lifting platform and the first feeding clamp, and sets a liftable limit baffle on the hydraulic press, which not only does not affect the entry and exit of the support tube, but also limits the triangular plate to ensure the precise pressing of the triangular plate and the support tube.

[0023] Thirdly, this invention uses a limiting guide rail in conjunction with five pulleys to achieve a 180-degree rotation of the horizontal tube during the reciprocating motion of the platform, thereby rotating the support tube onto the irregular bracket to weld it to the other side of the triangular plate.

[0024] Fourth, in this invention, the combination of chain conveyor belt, reciprocating platform, lifting platform and hydraulic press realizes the automation of conveying several support pipes forward and welding them in sequence, realizing the synchronous welding of different triangular plates and support pipes at different welding positions, which improves processing efficiency. Moreover, the whole process only requires simple manual operation to place the support pipes on the carrier block, without relying too much on manpower. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the support tube and triangular plate in an embodiment.

[0026] Figure 2 This is a three-dimensional structural diagram of an embodiment.

[0027] Figure 3 This is an exploded three-dimensional view of the chain conveyor belt and support tube in the embodiment.

[0028] Figure 4 yes Figure 3 Enlarged view of the local structure at point A1.

[0029] Figure 5 yes Figure 3 Enlarged view of the local structure at point A2.

[0030] Figure 6 This is a three-dimensional structural diagram of the operation and management component in an embodiment.

[0031] Figure 7 yes Figure 6 Enlarged view of the local structure at point B1.

[0032] Figure 8 yes Figure 6 Enlarged view of the local structure at point B2.

[0033] Figure 9 This is an exploded three-dimensional view of the reciprocating platform, support pipe, and hydraulic press in the embodiment.

[0034] Figure 10 yes Figure 9 Enlarged view of the local structure at point C1.

[0035] Figure 11 yes Figure 9 Enlarged view of the local structure at point C2.

[0036] Figure 12 yes Figure 9 Enlarged view of the local structure at point C3.

[0037] Figure 13 yes Figure 9 Enlarged view of the local structure at C4.

[0038] Figure 14 This is an exploded three-dimensional view of the reciprocating platform and threaded sleeve in the embodiment.

[0039] Figure 15 yes Figure 14 Enlarged view of the local structure at point D1.

[0040] Figure 16 yes Figure 14 Enlarged view of the local structure at point D2.

[0041] Figure 17 yes Figure 14 Enlarged view of the local structure at point D3.

[0042] Figure 18 This is a three-dimensional structural diagram of the flipping horizontal tube, flipping disc, and long vertical plate in the embodiment.

[0043] The following components are labeled in the diagram: 1. Chain conveyor belt; 2. Hydraulic press; 3. Support pipe; 4. Pipe transport assembly; 5. Reciprocating platform; 6. Lifting platform; 7. First feeding fixture; 8. Irregular bracket; 9. Tilting horizontal pipe; 10. Second feeding fixture; 11. First positioning fixture; 12. Second positioning fixture; 13. Tilting disc; 14. Pulley; 15. Limiting guide rail; 16. Triangular plate; 17. Bottom fixing block; 18. Carrier block; 19. Limiting top plate; 20. Proximity switch; 21. Slide rail; 22. Slider; 23. Hydraulic cylinder; 24. Limiting vertical shaft; 25. Threaded vertical shaft; 26. First fixing frame; 27. Second fixing frame; 28. First shaft seat; 29. ​​Second shaft seat; 30. Threaded sleeve; 31. First gear; 32. Gear motor; 33. Second gear; 34. First gripper; 35. Inclined gripper; 36. Second gripper; 37. Arc-shaped clamping plate; 38. Inclined bracket; 39. First bracket; 40. Third gripper; 41. Clamping block; 42. Second bracket; 43. Fixed gripper; 44. Third fixed frame; 45. Pressure block; 46. Dual-axis cylinder; 47. Arc-shaped surface; 48. Limiting baffle; 49. Limiting groove; 50. Long vertical plate; 51. First upper convex part; 52. First lower concave part; 53. Second upper convex part; 54. Second lower concave part; 55. Reinforcing rib; 56. Fourth fixed frame; 57. Long curved plate; 58. Short curved plate; 59. Connecting horizontal shaft; 60. Shaft seat; 61. Single-axis cylinder; 62. Hinge seat. Detailed Implementation

[0044] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0045] refer to Figures 1 to 18The automatic welding machine for mudguard support pipes of a powder tanker truck, as shown, includes a horizontally fixed chain conveyor belt 1, a hydraulic press 2 fixedly mounted at the tail end of the chain conveyor belt 1, and two automatic welding robots. Several support pipes 3 are transported from the head end to the tail end of the chain conveyor belt 1. The machine also includes a pipe transport assembly 4 mounted at the tail end of the chain conveyor belt 1. The pipe transport assembly 4 includes a horizontally positioned reciprocating platform 5 capable of moving back and forth along the forward direction of the chain conveyor belt 1; a vertically lifting platform 6 mounted on the reciprocating platform 5 near the head end of the chain conveyor belt 1; a first feeding clamp 7 fixedly mounted on the lifting platform 6 for clamping the corresponding support pipe 3 at the tail end of the chain conveyor belt 1 onto the hydraulic press 2; a shaped bracket 8 mounted on the reciprocating platform 5 away from the chain conveyor belt 1; a horizontally mounted tilting cross tube 9 axially connected to the reciprocating platform 5 away from the head end of the chain conveyor belt 1; and a hydraulic press 2 fixedly mounted on the tilting cross tube 9 for... The upper support tube 3 is clamped onto the irregular bracket 8 by the second feeding clamp 10. The hydraulic press 2 and the irregular bracket 8 are respectively fixedly provided with the first positioning clamp 11 and the second positioning clamp 12 for assisting in clamping the corresponding support tube 3. The end of the flipping horizontal tube 9 near the hydraulic press 2 is coaxially fixedly connected to the flipping disc 13. Two pulleys 14 are axially connected on one side of the flipping disc 13, and three pulleys 14 are axially connected on the other side of the flipping disc 13. A limiting guide rail 15 is fixedly provided between the hydraulic press 2 and the irregular bracket 8 to cooperate with the five pulleys 14 and drive the flipping horizontal tube 9 to rotate 180 degrees. The triangular plate 16 is fed in by the hydraulic press 2 and pressed by the hydraulic press 2 to the corresponding end of the support tube 3. Two automatic welding robots are respectively fixedly provided on the sides of the hydraulic press 2 and the irregular bracket 8 and weld the triangular plate 16 to the support tube 3. The irregular bracket 8 can rotate around its lower end and push the support tube 3 to the side of the irregular bracket 8 away from the chain conveyor belt 1 for collection.

[0046] The automatic welding machine is also equipped with a controller (not shown in the figure) connected to the chain conveyor belt 1 and the automatic welding robot. The support tube 3 is in the form of... Figure 1 The structure shown has a bent tube structure in its middle, and the triangular plate 16 is welded to one end of the support tube 3 (i.e. Figure 1 The state shown, Figure 1 The diagram shows two triangular plates 16. The upper triangular plate 16 is not pressed against the support tube 3, while the lower triangular plate 16 is fully pressed against the support tube 3. After being fully pressed against the support tube 3, the middle part of the triangular plate 16 is pressed into an upward-convex arc-shaped structure. Therefore, in order to ensure that both ends of the support tube 3 can be transported in a horizontal state, the chain conveyor belt 1 is... Figure 3The structure shown has two conveyor chains of different heights, one higher and one lower, which synchronously transport the two ends of the support tube 3. Each conveyor chain 1 is equipped with several gears for rotating the chain. A drive motor (electrically connected to a controller) is mounted on the conveyor chain 1 to drive one of these gears. This gear is connected to a corresponding gear on the other conveyor chain via a universal coupling. Several carriers are also fixedly connected to each conveyor chain. Each carrier includes two L-shaped bases fixed to the chain links. The system includes a fixed block 17 and a T-shaped carrier block 18 fixed to the two bottom fixed blocks 17. The carrier block 18 has a semi-circular groove adapted to the structure of the support tube 3. Limiting plates 19 and proximity switches 20 (electrically connected to the controller) are fixedly installed at the head and tail ends of the chain conveyor belt 1, respectively. The chain conveyor belt 1 operates at a relatively slow speed. Each time the corresponding carrier block 18 moves close to the limiting plate 19, the operator places the support tube 3 into the semi-circular groove on the corresponding two carrier blocks 18 and pushes the support tube 3 so that the corresponding end of the support tube 3 abuts against the limiting plate 19, thereby ensuring the subsequent... After the support tube 3 moves onto the hydraulic press 2, it maintains a precise upward position along its axis, ensuring that the subsequent triangular plate 16 can be pressed down to the corresponding position of the support tube 3. The proximity switch 20 is used to detect the position of the support tube 3. Each time a support tube 3 is sent close to the proximity switch 20, the proximity switch 20 detects the arrival of the support tube 3 and sends a signal to the controller. The controller receives the signal and sends a signal to the drive motor, thereby stopping the chain conveyor belt 1 from conveying the support tube 3. The drive motor synchronously drives two gears to rotate through the universal coupling, which in turn drives the two conveyor chains to rotate simultaneously. The machine rotates step by step, which in turn drives the support tube 3 forward. Each time the support tube 3 moves to the end of the chain conveyor belt 1 and is detected by the proximity switch 20, it is subsequently gripped by the first feeding clamp 7. In conjunction with the lifting of the lifting platform 6 and the movement of the reciprocating platform 5 towards the irregular bracket 8, the support tube 3 is moved onto the hydraulic press 2 and fixed by the first positioning clamp 11. Two automatic welding robots are not shown in the figure. One of the automatic welding robots is set on the hydraulic press 2, and it is used to press the triangular plate 16 on the hydraulic press 2 completely onto the support tube 3, and then to fix the connection between the triangular plate 16 and the support tube 3 (specifically... Figure 10Welding is performed at the location indicated by point a) to fix the corresponding end of the triangular plate 16 to the support tube 3. The automatic welding robot can rotate around the axis of the support tube 3 on the hydraulic press 2 to ensure that the corresponding connection between the triangular plate 16 and the support tube 3 is completely welded. After the support tube 3 is picked up by the second feeding clamp 10, it moves towards the irregular bracket 8 as the reciprocating platform 5 moves. With the cooperation of the four pulleys 14 and the limiting guide rail 15, the support tube 3 rotates 180 degrees with the flipping horizontal tube 9 during the movement, so that the triangular plate 16 moves to below the corresponding end of the support tube 3. Another automatic welding robot is located on the side of the irregular bracket 8 near the hydraulic press 2. After the support tube 3 is fed onto the irregular bracket 8 by the second feeding clamp 10, the second positioning clamp 12 fixes the support tube 3, and then the automatic welding robot welds the connection between the triangular plate 16 and the support tube 3 (specifically... Figure 11 Welding is performed at the location indicated by b in the middle (the automatic welding robot here consists of two symmetrically arranged welding guns that can synchronously translate along the axis of the corresponding ends of the support tube 3; the two welding guns weld the two joints of the triangular plate 16 and the support tube 3 in turn). After welding is completed, the second positioning clamp 12 releases the support tube 3, and the irregular bracket 8 rotates around its lower end in a direction away from the chain conveyor belt 1, thereby sending the support tube 3 and the triangular plate 16 to the corresponding side for collection. The hydraulic press 2 first presses the triangular plate 16, and then presses the triangular plate 16 and the support tube 3 together. For the welding of pipe 3, the triangular plate 16 and the support pipe 3 are welded first at the irregular bracket 8. Then, the irregular bracket 8 pushes down and collects the support pipe 3. The processing speed of the hydraulic press 2 and the irregular bracket 8 on the support pipe 3 is similar. Each time the triangular plate 16 and the support pipe 3 on the hydraulic press 2 are completely welded, the support pipe 3 on the irregular bracket 8 is also pushed down. The reciprocating platform 5 moves again and sends the support pipe 3 on the hydraulic press 2 to the irregular bracket 8. At the same time, the support pipe 3 on the chain conveyor belt 1 is sent to the hydraulic press 2. This process is repeated to process several support pipes 3.

[0047] To achieve the reciprocating translation of platform 5, the following features were specifically set:

[0048] Two symmetrically arranged slide rails 21 are fixedly installed below the tail end of the chain conveyor belt 1. Three sliders 22 are fixedly connected to both sides of the bottom of the reciprocating platform 5. The three sliders 22 on each side are slidably arranged on the corresponding slide rail 21. A hydraulic cylinder 23 is also fixedly installed below this end of the chain conveyor belt 1. The length direction of the output shaft of the hydraulic cylinder 23 is parallel to the length direction of the chain conveyor belt 1. The output end of the hydraulic cylinder 23 is fixedly connected to the reciprocating platform 5.

[0049] The hydraulic cylinder 23 is electrically connected to the controller. Since the reciprocating platform 5 is fixedly equipped with devices such as the lifting platform 6, the tilting horizontal tube 9, the first feeding clamp 7, and the second feeding clamp 10, and considering that the reciprocating platform 5 is relatively heavy, the slide rail 21 and the slider 22 are used to limit the reciprocating platform 5 first, and then the hydraulic cylinder 23 is used to drive the reciprocating platform 5 to move horizontally. The extreme position of the reciprocating platform 5 can be controlled by the position sensor in conjunction with the controller. This is a mature existing technology and will not be described in detail here.

[0050] To achieve vertical lifting of the lifting platform 6 on the reciprocating platform 5, the following features are specifically designed:

[0051] The lifting platform 6 is horizontally positioned above the reciprocating platform 5, and four evenly distributed limiting vertical shafts 24 are fixedly connected to the lower end of the lifting platform 6. Each limiting vertical shaft 24 is slidably mounted on the reciprocating platform 5 in a vertical direction. A threaded vertical shaft 25 is fixedly connected to the center of the bottom of the lifting platform 6. A first shaft seat 28 and a second shaft seat 29, which are distributed vertically at intervals, are fixedly connected to the reciprocating platform 5 through a first fixed frame 26 and a second fixed frame 27, respectively. A threaded sleeve 30 is axially mounted between the first shaft seat 28 and the second shaft seat 29 and is coaxially sleeved on the threaded vertical shaft 25. The threaded vertical shaft 25 is threadedly connected inside the threaded sleeve 30. A first gear 31 is also coaxially fixed to the outside of the threaded sleeve 30. A reduction motor 32 with its output shaft pointing vertically upward is also fixedly connected to the reciprocating platform 5. A second gear 33 that meshes with the first gear 31 is coaxially fixed to the output shaft of the reduction motor 32.

[0052] The geared motor 32 is electrically connected to the controller. The first bearing seat 28 and the second bearing seat 29 are both planar bearing seats with embedded bearings. The threaded sleeve 30 is clamped between the first bearing seat 28 and the second bearing seat 29, allowing the threaded sleeve 30 to rotate only in place on the reciprocating platform 5. After the geared motor 32 starts, it can drive the threaded sleeve 30 to rotate through the cooperation of the second gear 33 and the first gear 31. The threaded vertical shaft 25 is threadedly connected inside the threaded sleeve 30, and the lifting platform 6 is limited on the reciprocating platform 5 by four limiting vertical shafts 24. Therefore, after the threaded sleeve 30 rotates, it can drive the threaded vertical shaft 25 to move vertically up and down, thereby... The lifting platform 6 moves vertically. When the reciprocating platform 5 moves the lifting platform 6 close to the chain conveyor belt 1 and directly below the support tube 3 detected by the proximity switch 20, the controller controls the reduction motor 32 to work, so that the lifting platform 6 drives the first feeding clamp 7 to rise and finally clamp the support tube 3. Then the lifting platform 6 continues to rise, thereby avoiding the carrier block 18 and the proximity switch 20, so that the support tube 3 can leave the chain conveyor belt 1 and move towards the hydraulic press 2. With the cooperation of the reciprocating platform 5 and the lifting platform 6, the first feeding clamp 7 drives the support tube 3 to move onto the hydraulic press 2 to wait for the triangular plate 16 to be pressed.

[0053] In order to achieve stable clamping of the support tube 3 by the first feeding fixture 7, the following features are specifically designed:

[0054] The first feeding fixture 7 includes a first gripper 34, an inclined gripper 35, and a second gripper 36 arranged sequentially at intervals along the width direction of the chain conveyor belt 1. The first gripper 34, the inclined gripper 35, and the second gripper 36 have the same structure and are all pneumatic fingers. Each pneumatic finger has an arc-shaped clamping plate 37 fixedly connected to its two output ends. The inclined gripper 35 and the second gripper 36 are fixedly mounted on the top of the lifting platform 6 by the inclined bracket 38 and the first bracket 39, respectively.

[0055] The first gripper 34, the inclined gripper 35, and the second gripper 36 are all electrically connected to the controller. The controller controls the gripping or releasing of the support tube 3. Due to the special structure of the support tube 3, and the fact that one end of the support tube 3 is higher than the other when it is transported forward on the chain conveyor belt 1, the triangular plate 16 is welded to the higher end of the support tube 3 on the chain conveyor belt 1. The arc-shaped clamping plate 37, the first gripper 34, the inclined gripper 35, the second gripper 36, the first bracket 39, and the inclined bracket 38 are arranged in a certain order. Figure 6 , Figure 7 and Figure 9 As shown in the structure and position, the inclined gripper 35 is inclined relative to the lifting platform 6, thereby gripping the curved section of the support pipe 3. The first gripper 34 is lower than the second gripper 36, so it is directly fixed to the lifting platform 6 without the use of a bracket for fixation. The pneumatic fingers are wide pneumatic fingers, which drive the two arc-shaped clamps 37 to move closer and further away simultaneously, thereby stably gripping the support pipe 3.

[0056] In order to enable the second feeding fixture 10 to clamp the support tube 3 and connect the tilting horizontal tube 9 and the reciprocating platform 5, the following features are specifically designed:

[0057] The second feeding fixture 10 includes two third grippers 40 fixedly installed at both ends of the flipping horizontal tube 9 and of different heights. The third grippers 40 are Y-shaped pneumatic fingers, and clamping blocks 41 are fixedly connected to both output ends of the Y-shaped pneumatic fingers. A second bracket 42 is fixedly installed at one end of the reciprocating platform 5 away from the head end of the chain conveyor belt 1. The flipping horizontal tube 9 is axially connected to the second bracket 42 in a horizontal state.

[0058] The third gripper 40 is electrically connected to the controller. The controller controls the two third grippers 40 to grip or release the support tube 3. When the reciprocating platform 5 moves the tilting horizontal tube 9 to the closest and furthest points from the hydraulic press 2, both third grippers 40 are in a horizontal state. When the tilting horizontal tube 9 is closest to the hydraulic press 2, the third gripper 40 closer to the hydraulic press 2 is higher than the other third gripper 40, thus gripping the two ends of the support tube 3 at different heights respectively. The first positioning fixture 11 and the second positioning fixture 12 both include two fixed grippers 43 spaced apart along the width direction of the chain conveyor belt 1. Each fixed gripper 43 is fixedly mounted on the ground by a third fixing frame 44 (e.g., Figure 9 As shown in the figure, the fixed gripper 43 is also a Y-shaped pneumatic finger. The two output ends of the fixed gripper 43 are also fixedly connected with clamping blocks 41. The first positioning clamp 11 and the second positioning clamp 12 are used to assist in clamping the support tube 3 after the support tube 3 is sent to the hydraulic press 2 and the irregular bracket 8, so as to facilitate the subsequent connection of the triangular plate 16 and the support tube 3. At the same time, it also ensures that when the first feeding clamp 7 and the second feeding clamp 10 send the corresponding support tube 3 to the hydraulic press 2 and the irregular bracket 8 respectively, the first feeding clamp 7 and the second feeding clamp 10 can release the support tube 3 and continue to send the subsequent support tube 3.

[0059] In order to press the triangular plate 16 firmly onto the support tube 3, the following features are specifically designed:

[0060] The hydraulic press 2 includes a vertically lifting pressure block 45 and two symmetrically arranged dual-axis cylinders 46. The lower end of the pressure block 45 is provided with an arc-shaped surface 47 for bending the triangular plate 16 and pressing it against the support tube 3. The output end of each dual-axis cylinder 46 is vertically upward, and a limiting baffle 48 for limiting the triangular plate 16 is fixedly connected to the output end of each dual-axis cylinder 46. The top of the limiting baffle 48 is provided with a limiting groove 49 for preventing the triangular plate 16 from moving forward.

[0061] Hydraulic press 2 and the two twin-shaft cylinders 46 are all electrically connected to the controller, and hydraulic press 2 and triangular plate 16 are in a position... Figure 9The structure shown has clearance slots for the triangular plates 16 to enter. Several triangular plates 16 are stacked on the back side of the hydraulic press 2 (not shown in the figure), and are pushed into the hydraulic press 2 by push plates (not shown in the figure) on their output ends driven by cylinders (not shown in the figure). The triangular plates 16 are kept horizontal throughout the process and are eventually pushed onto two limit baffles 48. When the support pipe 3 has not entered the hydraulic press 2, the output ends of the two dual-shaft cylinders 46 descend vertically and drive the two limit baffles 48 to their lowest positions, thus allowing the support pipe 3 to smoothly enter and exit the hydraulic press 2. When the support pipe 3 is fully inserted into the hydraulic press 2, the two... The dual-axis cylinder 46 then drives the two limit baffles 48 to rise to the designated height. Subsequently, the triangular plate 16 is fed into the hydraulic press 2 and finally stops after contacting the limit groove 49. Then, the hydraulic press 2 drives the pressure block 45 to press vertically downwards onto the upper surface of the triangular plate 16. The hydraulic press 2 and the two dual-axis cylinders 46 then move synchronously, causing the pressure block 45 and the two limit baffles 48 to descend synchronously. This presses the middle part of the triangular plate 16 tightly onto the support tube 3, then bends the middle part of the triangular plate 16 upwards into a convex arc shape, ensuring that the middle part of the triangular plate 16 is completely fitted onto the support tube 3, while the two sides of the triangular plate 16 maintain a flat structure (see reference). Figure 10 (as shown in the diagram), and then the triangular plate 16 and the support tube 3 are welded together.

[0062] In order for the limiting guide rail 15 to work with the five pulleys 14 to drive the rotating disc 13 and the rotating horizontal tube 9 to rotate 180 degrees, the following features are specifically designed:

[0063] The limiting guide rail 15 includes two vertical strips 50 that are vertically arranged and spaced apart along the width of the chain conveyor belt 1. One of the vertical strips 50 has a first upper protrusion 51 formed on it, and both sides of the first upper protrusion 51 have first lower concave portions 52 formed to avoid the descent of the corresponding two pulleys 14. The other vertical strip 50 has two second upper protrusions 53 formed on it, and a second lower concave portion 54 that slides between the two second upper protrusions 53 is formed to cooperate with the corresponding pulley 14. A number of reinforcing ribs 55 are fixedly arranged between the two vertical strips 50 at intervals, and the two vertical strips 50 are fixedly arranged on the ground by a fourth fixing frame 56.

[0064] Two long vertical plates 50, a rotating disc 13, and five pulleys 14 are arranged in a 50-degree configuration. Figure 16 and Figure 18As shown in the structure and position, the rotating disc 13 has three pulleys 14 axially connected to one end near the rotating horizontal tube 9, and two pulleys 14 axially connected to the other side. Two second upper protrusions 53 are formed on the long vertical plate 50 near the rotating horizontal tube 9, while a first upper protrusion 51 is formed on the long vertical plate 50 away from the rotating horizontal tube 9. When the reciprocating platform 5 moves to the point furthest from the head of the chain conveyor belt 1, the two third grippers 40 are located at the end of the rotating horizontal tube 9 furthest from the chain conveyor belt 1. At this time, the two lower pulleys 14 on both sides of the rotating disc 13 slide on the two long vertical plates 50 respectively. When the rotating horizontal tube 9 moves towards the head of the chain conveyor belt 1 under the influence of the reciprocating platform 5, the two lower pulleys 14 slide on the two long vertical plates 50, keeping the rotating horizontal tube 9 from rotating. Then, the pulley 14 on the side of the rotating disc 13 closest to the rotating horizontal tube 9 and near the chain conveyor belt 1 first passes the first second upper protrusion 53, and then moves away from the chain conveyor belt on the same side. The lower pulley 14 of the belt 1 begins to contact the second upper protrusion 53, while the lower pulley 14 on the opposite side begins to slide into the first lower recess 52. Blocked by the second upper protrusion 53, the corresponding pulley 14 slides along the upper surface of the second upper protrusion 53, driving the rotating disc 13 to rotate. The corresponding pulley 14 falls into the first lower recess 52 simultaneously. The upper pulley 14 on the side of the rotating disc 13 away from the rotating horizontal tube 9 begins to cross the first upper protrusion 51, and the lower pulley 14 on that side crosses the first lower recess 52 and contacts the first upper protrusion 51. Similarly, under the action of the first upper protrusion 51, it continues to drive the rotating disc 13 to rotate, and gradually drives the pulley 14 that has crossed the first second upper protrusion 53 into the second lower recess 54. In this way, the rotating disc 13 rotates 90 degrees under the action of the five pulleys 14. Subsequently, with the movement of the reciprocating platform 5, the rotating disc 13 rotates 90 degrees again, so that the rotating horizontal tube 9 rotates 180 degrees as a whole. The same applies when the reciprocating platform 5 moves in the opposite direction.

[0065] In order to enable the irregular bracket 8 to push the support tube 3 away from the chain conveyor belt 1, the following features are specifically designed:

[0066] The irregular bracket 8 includes a long curved plate 57 and a short curved plate 58 spaced apart along the width direction of the chain conveyor belt 1. The short curved plate 58 is located on the side of the long curved plate 57 closer to the hydraulic press 2. The lower ends of the long curved plate 57 and the short curved plate 58 are fixedly connected to each other by two vertically spaced connecting horizontal shafts 59. The lower connecting horizontal shaft 59 is mounted on the ground by two shaft seats 60. A single-axis cylinder 61 is also provided on the side of the lower connecting horizontal shaft 59 closer to the chain conveyor belt 1. The output shaft of the single-axis cylinder 61 is obliquely upward and hinged to the upper connecting horizontal shaft 59. The lower end of the single-axis cylinder 61 is hinged on the ground by a hinge seat 62. The upper ends of the long curved plate 57 and the short curved plate 58 are both formed with an upwardly bent curved plate structure for pushing the support tube 3.

[0067] Long curved plate 57 and short curved plate 58 are in the form of Figure 6 , Figure 12 and Figure 13 In the structure shown, the upper curved plate structures of the long curved plate 57 and the short curved plate 58 are adapted to the outer walls of both ends of the support pipe 3, ensuring that the support pipe 3 can be supported at both ends. This also prevents the support pipe 3 from detaching from the irregular bracket 8 towards the chain conveyor belt 1 after the irregular bracket 8 rotates. The upper end of the long curved plate 57 is higher than the upper end of the short curved plate 58. Because the support pipe 3 is rotated 180 degrees and sent to the irregular bracket 8, the end of the support pipe 3 near the hydraulic press 2 is lower than the other end. Therefore, long curved plates 57 and short curved plates 58 of different heights are used to support the support pipe 3. The support pipe 3 is then sent to the irregular bracket 8. On bracket 8, with triangular plate 16 and support tube 3 completely welded, after the second feeding clamp 10 and the second positioning clamp 12 release the support tube 3, the output shaft of single-axis cylinder 61 extends out. The two ends of single-axis cylinder 61 adaptively rotate at hinge seat 62 and upper connecting horizontal axis 59 respectively, thereby driving short bending plate 58 and long bending plate 57 to rotate around their lower ends, thereby driving support tube 3 to move away from chain conveyor belt 1, and finally leave long bending plate 57 and short bending plate 58 under the action of inertial force. After the support tube 3 falls, it accumulates in the corresponding position and is eventually collected by the staff.

[0068] A method for using an automatic welding machine for mudguard support pipes of powder tank trucks, the method comprising the following steps:

[0069] S1, the staff places several support tubes 3 one by one on the carrier block 18 at the head end of the chain conveyor belt 1, and manually pushes the support tubes 3 to the state of contacting the limit plate 19. During the movement, the chain conveyor belt 1 continuously drives several support tubes 3 to the position detected by the proximity switch 20. After the proximity switch 20 detects the support tubes 3, the chain conveyor belt 1 stops conveying.

[0070] S2, the reciprocating platform 5 moves toward the head end of the chain conveyor belt 1. When there is a support pipe 3 at the hydraulic press 2, the first feeding clamp 7 releases the corresponding support pipe 3. The reciprocating platform 5, together with the lifting platform 6, drives the first feeding clamp 7 to move to the support pipe 3 detected by the proximity switch 20. The first feeding clamp 7 clamps the corresponding support pipe 3. At the same time, the reciprocating platform 5 drives the second feeding clamp 10 to move to the hydraulic press 2. When there is a support pipe 3 with a welded triangular plate 16 at the hydraulic press 2, the second feeding clamp 10 automatically clamps the support pipe 3 at the hydraulic press 2. At the same time, the first positioning clamp 11 releases the support pipe 3.

[0071] S3, the reciprocating platform 5 moves away from the chain conveyor belt 1, while the lifting platform 6 lifts and lowers to send the support pipe 3 held by the first feeding clamp 7 to the hydraulic press 2. At the same time, the first positioning clamp 11 clamps the support pipe 3, and the hydraulic press 2 presses the triangular plate 16 to the corresponding end of the support pipe 3. Then, the corresponding automatic welding robot welds the corresponding connection between the triangular plate 16 and the support pipe 3. Before the reciprocating platform 5 moves, if the support pipe 3 with the triangular plate 16 already welded at the hydraulic press 2, while the reciprocating platform 5 moves, the second feeding clamp 10 clamps and drives the corresponding support pipe 3 away from the chain conveyor belt 1. After driving the support pipe 3 to rotate 180 degrees, the support pipe 3 is sent to the irregular bracket 8. At the same time, the second positioning clamp 12 clamps the support pipe 3, and the corresponding automatic welding robot welds the corresponding connection between the triangular plate 16 and the support pipe 3.

[0072] S4. After the support tube 3 and triangular plate 16 at the irregular bracket 8 are welded, the second feeding clamp 10 and the second positioning clamp 12 both release the corresponding support tube 3. The single-axis cylinder 61 drives the upper end of the irregular bracket 8 to rotate and pushes the support tube 3 down the irregular bracket 8. Then the output shaft of the single-axis cylinder 61 retracts and drives the irregular bracket 8 back to its original position.

[0073] S5, repeat the steps described in S2 to S4 continuously.

[0074] Working principle: Step 1, the staff places several support tubes 3 one by one on the carrier block 18 at the head end of the chain conveyor belt 1 from a specific direction, and manually pushes the support tubes 3 to the state of contacting the limit plate 19. During the movement, the chain conveyor belt 1 continuously drives several support tubes 3 to the position detected by the proximity switch 20. After the proximity switch 20 detects the support tubes 3, the chain conveyor belt 1 stops conveying.

[0075] Step 2: The controller controls the output shaft of the hydraulic cylinder 23 to retract, driving the reciprocating platform 5 to move towards the head end of the chain conveyor belt 1. When there is a support pipe 3 at the hydraulic press 2, the controller controls the first gripper 34, the tilting gripper 35, and the second gripper 36 to release the corresponding support pipe 3. Then, the controller controls the reduction motor 32 to work, and the reciprocating platform 5, together with the lifting platform 6, drives the first feeding clamp 7 to move to the support pipe 3 detected by the proximity switch 20. The first feeding clamp 7 clamps the corresponding support pipe 3. At the same time, the reciprocating platform 5 drives the second feeding clamp 10 to move to the hydraulic press 2. When there is a support pipe 3 with a welded triangular plate 16 at the hydraulic press 2, the controller controls the two third grippers 40 to automatically clamp the support pipe 3 at the hydraulic press 2, and at the same time controls the first positioning clamp 11 to release the support pipe 3.

[0076] Step 3: The controller controls the output shaft of the hydraulic cylinder 23 to extend, and the reciprocating platform 5 moves away from the chain conveyor belt 1. At the same time, the controller controls the lifting platform 6 to lift and lower, sending the support tube 3 clamped by the first feeding clamp 7 to the hydraulic press 2. Simultaneously, the controller controls the first positioning clamp 11 to clamp the support tube 3, and controls the hydraulic press 2 to press the triangular plate 16 to the corresponding end of the support tube 3. Then, the controller controls the corresponding automatic welding robot to weld the corresponding connection between the triangular plate 16 and the support tube 3. Before the reciprocating platform 5 moves, if the support tube 3 with the triangular plate 16 already welded is already at the hydraulic press 2, while the reciprocating platform 5 moves, the controller controls the second feeding clamp 10 to clamp and move the corresponding support tube 3 away from the chain conveyor belt 1. After the support tube 3 is rotated 180 degrees, it is sent to the irregular bracket 8. At the same time, the controller controls the second positioning clamp 12 to clamp the support tube 3, and then controls the corresponding automatic welding robot to weld the corresponding connection between the triangular plate 16 and the support tube 3.

[0077] Step 4: After the support tube 3 and triangular plate 16 at the irregular bracket 8 are welded, the controller controls the second feeding clamp 10 and the second positioning clamp 12 to release the corresponding support tube 3. At the same time, the controller drives the single-axis cylinder 61 to rotate the upper end of the irregular bracket 8 and push the support tube 3 off the irregular bracket 8. Then, the controller controls the output shaft of the single-axis cylinder 61 to retract so that the irregular bracket 8 returns to its original position.

[0078] Then, by repeatedly performing steps two through four, several support tubes 3 and triangular plates 16 can be continuously welded together.

[0079] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A powder tank truck fender support pipe automatic welding machine, comprising a chain conveyor (1) fixedly arranged in a horizontal state, a hydraulic machine (2) and two automatic welding mechanical hands fixedly arranged at the tail end of the chain conveyor (1), and a plurality of support pipes (3) transported from the head end to the tail end of the chain conveyor (1), wherein a bent pipe structure exists in the middle of the support pipe (3), characterized in that, Further comprising a pipe conveying assembly (4) arranged at the tail end of the chain conveyor (1), the pipe conveying assembly (4) comprising a shuttle platform (5) horizontally arranged and capable of reciprocating along the advancing direction of the chain conveyor (1), a lifting platform (6) arranged at the side of the shuttle platform (5) close to the tail end of the chain conveyor (1) and capable of lifting along the vertical direction, a first feeding clamp (7) fixedly arranged on the lifting platform (6) and used for clamping the corresponding support pipe (3) at the tail end of the chain conveyor (1) to the hydraulic machine (2), a special-shaped bracket (8) arranged at the side of the shuttle platform (5) away from the chain conveyor (1), a turnover cross pipe (9) horizontally arranged and shaft-connected at the side of the shuttle platform (5) away from the head end of the chain conveyor (1), and a second feeding clamp (10) fixedly arranged on the turnover cross pipe (9) and used for clamping the support pipe (3) on the hydraulic machine (2) to the special-shaped bracket (8), first and second positioning clamps (11) and (12) are fixedly arranged at the sides of the hydraulic machine (2) and the special-shaped bracket (8) respectively and used for assisting in clamping the corresponding support pipe (3), one end of the turnover cross pipe (9) close to the hydraulic machine (2) is coaxially fixedly connected with a turnover disc (13), two pulleys are shaft-connected at one side of the turnover disc (13), three pulleys are shaft-connected at the other side of the turnover disc (13), a limiting guide rail (15) is fixedly arranged between the hydraulic machine (2) and the special-shaped bracket (8) and used for cooperating with the five pulleys and driving the turnover cross pipe (9) to turn by one hundred and eighty degrees, a triangular plate (16) is sent from the hydraulic machine (2) and pressed by the hydraulic machine (2) to the corresponding end of the support pipe (3), two automatic welding manipulators are fixedly arranged at the sides of the hydraulic machine (2) and the special-shaped bracket (8) respectively and used for welding the triangular plate (16) on the support pipe (3), and the special-shaped bracket (8) can rotate around the lower end thereof and push the support pipe (3) to the side of the special-shaped bracket (8) away from the chain conveyor (1) for collection; The limiting guide rail (15) comprises two long strip vertical plates (50) vertically arranged and spaced apart along the width direction of the chain conveyor (1), one of the long strip vertical plates (50) is formed with a first upper convex part (51), and the two sides of the first upper convex part (51) are formed with first lower concave parts (52) for avoiding the corresponding two pulleys to descend, the other long strip vertical plate (50) is formed with two second upper convex parts (53), and a second lower concave part (54) is further formed between the two second upper convex parts (53) and used for slidingly cooperating with the corresponding pulley, a plurality of reinforcing ribs (55) are fixedly arranged between the two long strip vertical plates (50), and the two long strip vertical plates (50) are fixedly arranged on the ground through a fourth fixing frame (56).

2. A powder tank truck mudguard support pipe automatic welding machine according to claim 1, characterized in that, Two symmetrical slide rails (21) are fixedly arranged below the tail end of the chain conveyor (1), three slide blocks (22) are fixedly connected to the bottom of the shuttle platform (5), the three slide blocks (22) on each side are slidingly arranged on the corresponding slide rail (21), a hydraulic cylinder (23) is further fixedly arranged below the tail end of the chain conveyor (1), the length direction of the output shaft of the hydraulic cylinder (23) is parallel to the length direction of the chain conveyor (1), the output end of the hydraulic cylinder (23) is fixedly connected with the shuttle platform (5), and the head end and the tail end of the chain conveyor (1) are respectively fixedly provided with a limiting top plate (19) and a proximity switch (20).

3. A powder tank truck mudguard support tube automatic welding machine according to claim 1, characterized in that, The lifting platform (6) is arranged above the shuttle platform (5) in a horizontal state, four evenly distributed limiting vertical shafts (24) are fixedly connected to the lower end of the lifting platform (6), each limiting vertical shaft (24) is slidingly arranged on the shuttle platform (5) in a vertical direction, a threaded vertical shaft (25) is fixedly connected to the bottom center of the lifting platform (6), the shuttle platform (5) is respectively fixedly connected with a first shaft seat (28) and a second shaft seat (29) which are spaced apart in an up-down direction through a first fixing frame (26) and a second fixing frame (27), a threaded sleeve (30) is coaxially arranged on the threaded vertical shaft (25) and arranged in a shaft connection manner between the first shaft seat (28) and the second shaft seat (29), the threaded vertical shaft (25) is threadedly connected in the threaded sleeve (30), a first gear (31) is further coaxially fixedly connected outside the threaded sleeve (30), and a speed reduction motor (32) with an output shaft vertically upward is further fixedly connected to the shuttle platform (5), and a second gear (33) engaged with the first gear (31) is coaxially fixedly connected to the output shaft of the speed reduction motor (32).

4. A powder tank truck mudguard support tube automatic welding machine according to claim 1, characterized in that, The first feeding clamp (7) comprises a first clamping jaw (34), an inclined clamping jaw (35) and a second clamping jaw (36) which are sequentially and spaced apart in the width direction of the chain conveyor (1), the first clamping jaw (34), the inclined clamping jaw (35) and the second clamping jaw (36) are identical in structure and are all pneumatic fingers, arc-shaped clamping plates (37) are fixedly connected to the two output ends of each pneumatic finger, and the inclined clamping jaw (35) and the second clamping jaw (36) are fixedly arranged on the top of the lifting platform (6) through inclined supports (38) and first supports (39).

5. A powder tank truck mudguard support tube automatic welding machine according to claim 1, characterized in that, The second feeding clamp (10) comprises two third clamping jaws (40) fixedly arranged at the two ends of the turnover horizontal pipe (9) and having different heights, the third clamping jaw (40) is a Y-shaped pneumatic finger, clamping blocks (41) are fixedly connected to the two output ends of the Y-shaped pneumatic finger, a second support (42) is fixedly arranged at the end of the shuttle platform (5) away from the head end of the chain conveyor (1), and the turnover horizontal pipe (9) is arranged in a horizontal state and in a shaft connection manner on the second support (42).

6. A powder tank truck mudguard support tube automatic welding machine according to claim 1, characterized in that, The hydraulic machine (2) comprises a vertically liftable pressing block (45) and two symmetrically arranged double-shaft air cylinders (46), the lower end of the pressing block (45) is provided with an arc surface (47) for pressing and bending the triangular plate (16) and tightly attaching the triangular plate (16) to the support pipe (3), the output end of each double-shaft air cylinder (46) is vertically upward, and the output end of each double-shaft air cylinder (46) is fixedly connected with a limiting baffle (48) for limiting the triangular plate (16), and the top of the limiting baffle (48) is provided with a limiting groove (49) for blocking the triangular plate (16) from continuing to advance.

7. A powder tank truck mudguard support tube automatic welding machine according to claim 2, characterized in that, The special-shaped bracket (8) comprises long bent plates (57) and short bent plates (58) which are arranged at intervals along the width direction of the chain conveyor (1), and the short bent plates (58) are located on the side of the long bent plates (57) close to the hydraulic machine (2), the lower ends of the long bent plates (57) and the short bent plates (58) are fixedly connected with each other through two upper and lower spaced connecting horizontal shafts (59), the lower connecting horizontal shaft (59) is arranged on the ground through two shaft seats (60), and a single-shaft air cylinder (61) is further arranged on the side of the lower connecting horizontal shaft (59) close to the chain conveyor (1), the output shaft of the single-shaft air cylinder (61) is obliquely upward and is hingedly connected with the upper connecting horizontal shaft (59), the lower end of the single-shaft air cylinder (61) is hingedly arranged on the ground through a hinge seat (62), and the upper ends of the long bent plates (57) and the short bent plates (58) are formed with bent plate structures which are upwardly bent and used for pushing the support pipe (3).

8. A method of using a powder tank truck fender support tube automatic welding machine, using the powder tank truck fender support tube automatic welding machine according to claim 7, characterized in that, The use method comprises the following steps: S1, the staff places a plurality of support pipes (3) on the carrier block (18) at the head end of the chain conveyor (1) one by one, and manually pushes the support pipes (3) to abut against the limiting top plate (19), the chain conveyor (1) continuously drives a plurality of support pipes (3) to the position detected by the proximity switch (20) in the movement process, and stops conveying after the proximity switch (20) detects the support pipe (3); S2, the reciprocating platform (5) moves towards the head end of the chain conveyor (1), in the case that the hydraulic machine (2) has a support pipe (3), the first feeding clamp (7) releases the corresponding support pipe (3), the reciprocating platform (5) drives the first feeding clamp (7) to move to the support pipe (3) detected by the proximity switch (20) in cooperation with the lifting platform (6), the first feeding clamp (7) clamps the corresponding support pipe (3), the reciprocating platform (5) drives the second feeding clamp (10) to move to the hydraulic machine (2) at the same time, in the case that the hydraulic machine (2) has a support pipe (3) with a welded triangular plate (16), the second feeding clamp (10) automatically clamps the support pipe (3) at the hydraulic machine (2), and the first positioning clamp (11) releases the support pipe (3); S3, the reciprocating platform (5) moves away from the chain conveyor (1) and the lifting platform (6) lifts the first feeding clamp (7) to send the support pipe (3) to the hydraulic machine (2), and the first positioning clamp (11) clamps the support pipe (3), the hydraulic machine (2) presses the triangular plate (16) to the corresponding end of the support pipe (3), and then the corresponding automatic welding manipulator welds the corresponding connection between the triangular plate (16) and the support pipe (3), before the reciprocating platform (5) moves, if the hydraulic machine (2) has a support pipe (3) welded with a triangular plate (16), the second feeding clamp (10) clamps and drives the corresponding support pipe (3) away from the chain conveyor (1) while the reciprocating platform (5) moves, and after the support pipe (3) is turned one hundred and eighty degrees, the second feeding clamp (10) sends the support pipe (3) to the special-shaped bracket (8), and the second positioning clamp (12) clamps the support pipe (3), and the corresponding automatic welding manipulator welds the corresponding connection between the triangular plate (16) and the support pipe (3); S4, after the support pipe (3) and the triangular plate (16) are welded at the special-shaped bracket (8), the second feeding clamp (10) and the second positioning clamp (12) are loosened, the single-shaft air cylinder (61) drives the upper end of the special-shaped bracket (8) to rotate and pushes the support pipe (3) off the special-shaped bracket (8), and then the output shaft of the single-shaft air cylinder (61) is retracted to drive the special-shaped bracket (8) to return to the original position; S5, S2 to S4 are repeatedly performed.

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