A multi-station welding device for excavator boom

Abstract

The present invention relates to the technical field of excavator production, and discloses a multi-station welding device for an excavator boom, comprising a mounting frame, wherein a bidirectional threaded rod is rotatably connected inside the mounting frame, and a plurality of sliding blocks are threadedly matched on the outer surface of the bidirectional threaded rod. The multi-station welding device for the excavator boom is configured such that the boom is placed under the mounting frame, and then the boom is automatically fed to a welding processing position through the cooperation of a boom feeding and fixing mechanism, and then the bidirectional threaded rod is driven to rotate through a second transmission mechanism, driving a first mounting ring and a second mounting ring on both sides to move toward the middle, and then the surface of the boom is fully welded and processed through the multi-station welding mechanism and the surface processing mechanism in the first mounting ring and the second mounting ring, and at the same time, the middle position of the boom is welded in cooperation with the boom feeding mechanism, thereby realizing comprehensive welding of the boom, and greatly improving the welding efficiency and welding effect of the boom.

Description

Technical Field

[0001] The invention relates to the technical field of excavator production, and in particular to a multi-station welding device for an excavator boom. Background Art

[0002] Excavators are now common heavy equipment with a wide range of uses. The boom of an excavator plays a major role in bearing force, and its strength directly affects the use effect. Therefore, high-strength materials are needed to weld and assemble the boom of the excavator. Existing excavator boom welding generally uses a positioner and a welding robot for automated welding.

[0003] However, the welding action of the existing welding robot is mainly performed by the robot welding arm. When the boom of the excavator to be processed needs to be flipped, it is not flexible enough to rely solely on the robot welding arm to perform the corresponding welding action. At the same time, the welding station is also greatly limited. Only local welding processing can be performed on the boom, and the boom cannot be fully automated. The welding efficiency of the boom is low. Summary of the invention

[0004] The object of the present invention is to provide a multi-station welding device for an excavator boom to solve the problems in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A multi-station welding device for an excavator boom comprises a mounting frame, wherein a bidirectional threaded rod is rotatably connected in the mounting frame, a plurality of sliders are threadedly matched on the outer surface of the bidirectional threaded rod, a guide rod fixedly connected to the mounting frame is slidably connected in the slider, a first mounting ring is fixedly connected to one side of the slider, a second mounting ring fixedly connected to the slider is arranged behind the first mounting ring, a transmission ring is rotatably connected in the first mounting ring and the second mounting ring, a first transmission mechanism is transmission-connected to the outer surface of the transmission ring, the first transmission mechanism is used to drive the transmission ring to rotate, a plurality of welding mechanisms are arranged on the transmission ring in the first mounting ring, the welding mechanisms are used to weld the boom, a surface treatment mechanism is arranged on the transmission ring in the second mounting ring, the surface treatment mechanism is used to grind and stress-relieve the welding position;

[0007] The mounting frame is provided with a boom loading and fixing mechanism, which is used to load and fix the boom. The outer surface of the bidirectional threaded rod is transmission-connected with a second transmission mechanism connected to the mounting frame, and the second transmission mechanism is used to drive the bidirectional threaded rod to rotate.

[0008] As a further solution of the present invention: the welding mechanism includes a plurality of first mounting platforms fixedly connected to the transmission ring inside the first mounting circle, a first robotic arm is fixedly connected to the first mounting platform, an output end of the first robotic arm is fixedly connected to a welding head, and an input end of the welding head is fixedly connected to a welding machine fixedly connected to the first mounting platform.

[0009] As a further solution of the present invention: the first transmission mechanism includes a first transmission motor fixedly connected to the first mounting ring and the second mounting ring, the output end of the first transmission motor is fixedly connected to the first transmission shaft through a coupling, the outer surface of the first transmission shaft is fixedly sleeved with a first gear, the outer surface of the first gear is meshingly connected with a transmission gear ring, and a connecting ring fixedly connected to the transmission ring is fixedly connected inside the transmission gear ring.

[0010] As a further solution of the present invention: the feeding mechanism includes a plurality of first electric hydraulic rods fixedly connected to the mounting frame, the mounting frame is provided with two mounting grooves on the top, a transmission plate is slidably connected in the mounting groove, a second electric hydraulic rod fixedly connected to the mounting groove is fixedly connected to one side of the transmission plate, a third electric hydraulic rod is fixedly connected to the bottom of the transmission plate, the bottom ends of the first electric hydraulic rod and the third electric hydraulic rod are fixedly connected to a clamping frame, a fourth electric hydraulic rod is fixedly connected in the clamping frame, and one end of the fourth electric hydraulic rod is fixedly connected to a clamping block.

[0011] As a further solution of the present invention: a rubber buffer pad is fixedly connected to one side of the clamping block.

[0012] As a further solution of the present invention: the surface treatment mechanism includes a plurality of second mounting platforms fixedly connected to the transmission ring in the second mounting ring, a second mechanical arm is fixedly connected to the second mounting platform, one end of the second mechanical arm is fixedly connected to the mounting box, one side of the mounting box is fixedly connected to the second transmission motor, the output end of the second transmission motor is fixedly connected to the second transmission shaft rotatably connected to the mounting box through a coupling, a cam is fixedly sleeved on the outer surface of the second transmission shaft, a transmission block is slidably connected to the outer surface of the cam, a transmission column slidably connected to the mounting box on one side of the transmission block, a first spring fixedly sleeved on the outer surface of the transmission column is fixedly connected to the transmission block, one end of the transmission column is fixedly connected to the first connecting block, one side of the first connecting block is fixedly connected to the first telescopic rod, one end of the first telescopic rod is fixedly connected to the mounting frame, a knocking wheel is rotatably connected in the mounting frame, and the outer surface of the first telescopic rod is fixedly sleeved with the second spring fixedly connected to the first connecting block.

[0013] As a further solution of the present invention: the outer surface of the second transmission shaft is fixedly sleeved with a first bevel gear, the outer surface of the first bevel gear is meshingly connected with a second bevel gear, the middle of the second bevel gear is fixedly sleeved with a third transmission shaft rotatably connected to the mounting box, one end of the third transmission shaft is fixedly connected with a second connecting block, one end of the second connecting block is fixedly connected with a second telescopic rod, one end of the second telescopic rod is fixedly connected with a third connecting block, the outer surface of the second telescopic rod is fixedly sleeved with a third spring fixedly connected to the third connecting block, and one side of the third connecting block is fixedly connected with a grinding wheel.

[0014] As a further solution of the present invention: the second transmission mechanism includes a third motor fixedly connected to the mounting frame, the output end of the third motor is fixedly connected to the fourth transmission shaft through a coupling, the outer surface of the fourth transmission shaft is fixedly sleeved with a second gear, and the outer surface of the second gear is meshingly connected with the third gear fixedly sleeved with the bidirectional threaded rod.

[0015] Beneficial effects of the present invention:

[0016] (1) The boom is placed under the mounting frame, and then the boom is automatically loaded to the welding processing position through the cooperation of the boom loading and fixing mechanism. Then, the bidirectional threaded rod is driven to rotate through the second transmission mechanism, and the first mounting ring and the second mounting ring on both sides are driven to move toward the middle. Then, the surface of the boom is fully welded and processed through the multi-station welding mechanism and the surface treatment mechanism in the first mounting ring and the second mounting ring. At the same time, the boom loading mechanism is cooperated to perform welding processing on the middle position of the boom, thereby realizing comprehensive welding of the boom, which greatly improves the welding efficiency and welding effect of the boom.

[0017] (2) After the boom is subjected to multi-station welding by the welding structure in the first mounting circle, the welding joints of the boom are then knocked by the surface treatment mechanism in the second mounting circle to release the stress at the welds, thereby reducing the stress that causes cracks at the welds and leads to poor welding effect. At the same time, the welds are polished to make the surface of the welds smooth, which is convenient for the subsequent painting of the boom surface, thereby achieving effective multi-station automatic processing of the welds of the boom after welding, greatly improving the welding effect of the boom.

[0018] (3) The boom is automatically loaded and fixed through the loading and fixing mechanism, which is convenient for the workers to weld the boom. There is no need for manual loading, which greatly reduces the labor intensity of the workers. At the same time, the clamping position of the boom is automatically adjusted, which improves the flexibility of the boom clamping and fixing, and further improves the welding efficiency of the boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a first stereogram of the external structure of the present invention;

[0021] Figure 2 is a second stereoscopic diagram of the external structure of the present invention;

[0022] Figure 3 is a third stereogram of the external structure of the present invention;

[0023] Figure 4 is a side view of the internal structure of the installation box of the present invention;

[0024] Figure 5 The present invention Figure 2 A magnified view of middle;

[0025] Figure 6 The present invention Figure 3 Enlarged view of middle B;

[0026] Figure 7 The present invention Figure 5 Enlarged view of C in the middle.

[0027] In the figure: 1, mounting frame; 2, bidirectional threaded rod; 3, slider; 4, guide rod; 5, first mounting ring; 6, second mounting ring; 7, transmission ring; 11, first mounting platform; 12, first mechanical arm; 13, welding head; 21, first transmission motor; 22, first transmission shaft; 23, first gear; 24, transmission gear ring; 25, connecting ring; 31, first electric hydraulic rod; 32, mounting groove; 33, transmission plate; 34, second electric hydraulic rod; 35, third electric hydraulic rod; 36, clamping frame; 37, fourth electric hydraulic rod; 38, clamping block; 41, second mechanical arm; 42, mounting box ; 43. second transmission motor; 44. second transmission shaft; 45. cam; 46. transmission block; 47. transmission column; 48. first spring; 49. first connecting block; 490. first telescopic rod; 491. mounting frame; 492. knocking wheel; 493. second spring; 494. second mounting platform; 51. first bevel gear; 52. second bevel gear; 53. third transmission shaft; 54. second connecting block; 55. second telescopic rod; 56. third connecting block; 57. grinding wheel; 58. third spring; 61. third motor; 62. fourth transmission shaft; 63. second gear; 64. third gear. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 7 As shown, the present invention is a multi-station welding device for an excavator boom, comprising a mounting frame 1, a bidirectional threaded rod 2 is rotatably connected in the mounting frame 1, the threads at both ends of the bidirectional threaded rod 2 are opened in opposite directions, a plurality of sliders 3 are threadedly matched on the outer surface of the bidirectional threaded rod 2, a guide rod 4 fixedly connected to the mounting frame 1 is slidably connected in the slider 3, a first mounting ring 5 is fixedly connected to one side of the slider 3, a second mounting ring 6 fixedly connected to the slider 3 is arranged behind the first mounting ring 5, a transmission ring 7 is rotatably connected in the first mounting ring 5 and the second mounting ring 6, the outer surface of the transmission ring 7 is transmission-connected with a first transmission mechanism, the first transmission mechanism is used to drive the transmission ring 7 to rotate, a plurality of welding mechanisms are arranged on the transmission ring 7 in the first mounting ring 5, the welding mechanism is used to weld the boom, a surface treatment mechanism is arranged on the transmission ring 7 in the second mounting ring 6, the surface treatment mechanism is used to grind and stress-relieve the welding position;

[0031] The mounting frame 1 is provided with a boom loading and fixing mechanism, which is used to load and fix the boom. The outer surface of the bidirectional threaded rod 2 is transmission-connected with a second transmission mechanism connected to the mounting frame 1, and the second transmission mechanism is used to drive the bidirectional threaded rod 2 to rotate.

[0032] The second transmission mechanism includes a third motor 61 fixedly connected to the mounting frame 1. The third motor 61 is controlled by a PLC programming program, and can be controlled to rotate forward and reverse and rotate at an angle. The output end of the third motor 61 is fixedly connected to a fourth transmission shaft 62 through a coupling. The outer surface of the fourth transmission shaft 62 is fixedly sleeved with a second gear 63. The outer surface of the second gear 63 is meshingly connected with a third gear 64 fixedly sleeved with the bidirectional threaded rod 2.

[0033] The fourth transmission shaft 62 is driven to rotate by the third motor 61 , and the fourth transmission shaft 62 drives the bidirectional threaded rod 2 to rotate forward and reversely through the second gear 63 and the third gear 64 .

[0034] The excavator boom is placed under the mounting frame 1, and then the boom is clamped by the boom loading and fixing mechanism and moved upward to the welding position, and then the bidirectional threaded rod 2 is driven to rotate by the second transmission mechanism, and the bidirectional threaded rod 2 drives the sliders 3 on both sides to move closer to each other, and the sliders 3 on both sides drive the first mounting ring 5 and the second mounting ring 6 to move, and then the first transmission mechanism on the first mounting ring 5 drives the transmission ring 7 to rotate, and at the same time, the multi-station welding mechanism on the transmission ring 7 performs welding processing on the boom, so as to realize multi-station comprehensive welding of the boom, and at the same time, the boom is welded in two directions and at the same time, the welding efficiency of the boom is greatly improved. At the same time, after welding, The first transmission mechanism on the second mounting circle 6 behind the first mounting circle 5 drives the transmission circle 7 to rotate, and the transmission circle 7 drives the surface treatment mechanism to rotate. The surface treatment mechanism treats the welding part on the boom to make the welding effect of the weld after welding better. When the first mounting circle 5 is about to move to the middle position, the two sides of the boom are clamped by the boom feeding and fixing mechanism, and the middle position of the boom is no longer clamped. Then, the boom is driven to move to the left by the boom feeding and fixing mechanism, so that it moves a certain distance, so that the welding mechanism and surface treatment mechanism in the first mounting circle 5 and the second mounting circle 6 perform welding treatment on the middle position of the boom, thereby realizing comprehensive welding of the boom, which greatly improves the welding efficiency and welding effect of the boom.

[0035] Embodiment 2

[0036] Based on Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the welding mechanism includes a plurality of first mounting platforms 11 fixedly connected to the transmission ring 7 inside the first mounting ring 5, a first robotic arm 12 is fixedly connected to the first mounting platform 11, a welding head 13 is fixedly connected to the output end of the first robotic arm 12, and an input section of the welding head 13 is fixedly connected to a welding machine fixedly connected to the first mounting platform 11.

[0037] The first transmission mechanism includes a first transmission motor 21 fixedly connected to the first mounting ring 5 and the second mounting ring 6. The first transmission motor 21 is controlled by a PLC programming program to control the first transmission motor 21 to rotate forward and reverse and rotate at an angle. The output end of the first transmission motor 21 is fixedly connected to a first transmission shaft 22 through a coupling. A first gear 23 is fixedly sleeved on an outer surface of the first transmission shaft 22. A transmission gear ring 24 is meshedly connected to an outer surface of the first gear 23. A connecting ring 25 fixedly connected to the transmission ring 7 is fixedly connected inside the transmission gear ring 24.

[0038] The first transmission shaft 22 is driven to rotate by the first transmission motor 21 , the first transmission shaft 22 drives the transmission gear ring 24 to rotate through the first gear 23 , and the transmission gear ring 24 drives the connecting ring 25 and the transmission ring 7 to rotate.

[0039] The feeding mechanism includes a plurality of first electric hydraulic rods 31 fixedly connected to the mounting frame 1, two mounting grooves 32 are provided on the top of the mounting frame 1, a transmission plate 33 is slidably connected in the mounting groove 32, a second electric hydraulic rod 34 fixedly connected to the mounting groove 32 is fixedly connected on one side of the transmission plate 33, a third electric hydraulic rod 35 is fixedly connected to the bottom of the transmission plate 33, a clamping frame 36 is fixedly connected to the bottom ends of the first electric hydraulic rod 31 and the third electric hydraulic rod 35, a fourth electric hydraulic rod 37 is fixedly connected in the clamping frame 36, and a clamping block 38 is fixedly connected to one end of the fourth electric hydraulic rod 37.

[0040] A rubber buffer pad is fixedly connected to one side of the clamping block 38 .

[0041] The boom is placed into the mounting frame 1, and then the first electric hydraulic rod 31 in the middle position of the mounting frame 1 drives the clamping frame 36 to move downward, so that the middle position of the boom enters the clamping frame 36, and then the fourth electric hydraulic rod 37 drives the clamping block 38 to clamp and fix the boom, and then the first electric hydraulic rod 31 drives the clamping frame 36 to move upward, so that the boom is lifted upward to realize automatic loading of the boom, and then the first mounting ring 5 and the second mounting ring 6 are driven to move so that they are inserted into the outside of the boom. At the same time, during the processing, the first electric hydraulic rod 31 can also be used to drive the boom to move up and down to adjust the position of the boom, so that the welding mechanism and surface treatment mechanism in the first mounting ring 5 and the second mounting ring 6 can perform welding processing on the surface of the boom. When the welding process reaches the middle position, the clamping frame 36 blocks the middle position of the boom, so that the middle position of the boom cannot be welded. Then, the clamping frame 36 is driven downward by the third electric hydraulic rod 35, so that the clamping frame 36 will be inserted into the positions on both sides of the boom, and then the clamping block 38 is driven by the fourth electric hydraulic rod 37 to clamp and fix the two sides of the boom. Then, the clamping block 38 in the clamping frame 36 on the first electric hydraulic rod 31 in the middle position of the mounting frame 1 no longer clamps the boom, and drives the clamping frame 36 to move upward, and then the transmission plate 33 is driven to move by the second electric hydraulic rod 34, and the transmission plate 33 drives the third electric hydraulic rod 35 to move, thereby driving the boom to move to a certain position, and then the two-way threaded rod 2 is driven to move in the opposite direction by the second transmission mechanism, and the first mounting ring 5 and the second mounting ring 6 are driven to move, and the middle position of the boom is processed, so as to realize the comprehensive processing of the boom, thereby realizing automatic loading and fixing of the boom and the position movement of the boom, which is convenient for the welding mechanism and the surface treatment mechanism to fully process the boom.

[0042] Embodiment 3

[0043] Based on Example 2, please refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, by driving the first mounting circle 5 to move, multiple first mechanical arms 12 on the transmission circle 7 in the first mounting circle 5 are moved on the surface of the movable arm, and at the same time, the transmission circle 7 is driven to rotate by the first transmission mechanism to adjust the rotation of the mechanical arm, and then the welding head 13 is driven to move by the first mechanical arm 12, so that the welding head 13 welds the welding position of the movable arm, thereby realizing simultaneous welding of multiple positions of the movable arm, and also realizing comprehensive welding of the surface of the movable arm without dead angles, which greatly improves the welding efficiency and welding effect of the movable arm.

[0044] The surface treatment mechanism includes a plurality of second mounting platforms 494 fixedly connected to the transmission ring 7 inside the second mounting ring 6, a second mechanical arm 41 fixedly connected to the second mounting platform 494, one end of the second mechanical arm 41 fixedly connected to the mounting box 42, one side of the mounting box 42 fixedly connected to the second transmission motor 43, the output end of the second transmission motor 43 is fixedly connected to the second transmission shaft 44 rotatably connected to the mounting box 42 through a coupling, the outer surface of the second transmission shaft 44 is fixedly sleeved with a cam 45, the outer surface of the cam 45 is slidably connected to a transmission block 46, and the transmission One side of the block 46 is fixedly connected with a transmission column 47 which is slidably connected to the installation box 42, the outer surface of the transmission column 47 is fixedly sleeved with a first spring 48 which is fixedly connected to the transmission block 46, one end of the transmission column 47 is fixedly connected with a first connecting block 49, one side of the first connecting block 49 is fixedly connected with a first telescopic rod 490, one end of the first telescopic rod 490 is fixedly connected with a mounting frame 491, a knocking wheel 492 is rotatably connected inside the mounting frame 491, and the outer surface of the first telescopic rod 490 is fixedly sleeved with a second spring 493 which is fixedly connected to the first connecting block 49.

[0045] The outer surface of the second transmission shaft 44 is fixedly sleeved with the first bevel gear 51, the outer surface of the first bevel gear 51 is meshedly connected with the second bevel gear 52, the middle of the second bevel gear 52 is fixedly sleeved with the third transmission shaft 53 rotatably connected to the mounting box 42, one end of the third transmission shaft 53 is fixedly connected with the second connecting block 54, one end of the second connecting block 54 is fixedly connected with the second telescopic rod 55, one end of the second telescopic rod 55 is fixedly connected with the third connecting block 56, the outer surface of the second telescopic rod 55 is fixedly sleeved with the third spring 58 fixedly connected to the third connecting block 56, and one side of the third connecting block 56 is fixedly connected with a grinding wheel 57.

[0046] By driving the second mounting ring 6 to move, and then driving the transmission ring 7 to rotate through the first transmission mechanism, the transmission ring 7 drives the second mechanical arm 41 to rotate, and the second mechanical arm 41 is rotated and adjusted, and then the second mechanical arm 41 drives the surface treatment mechanism to move, so that the surface treatment mechanism processes the welding position, so as to realize multi-station surface treatment of the movable arm surface, and improve the efficiency of the surface treatment of the movable arm after welding. During the surface treatment process, the second mechanical arm 41 drives the mounting box 42 to move to the welding position, and then the second transmission motor 43 drives the second transmission shaft 44 to rotate, and the second transmission shaft 44 drives the cam 45 to rotate, and the cam 45 drives the transmission column 47 to reciprocate through the transmission block 46, and then the transmission column 47 drives the first connecting block 49 to reciprocate, and the transmission block 46 drives the first telescopic rod 490 and the mounting box 490 to rotate. The mounting frame 491 moves back and forth, the first telescopic rod 490 and the second spring 493 perform telescopic buffering, so that the knocking wheel 492 on the mounting frame 491 knocks the weld just welded, so that the concentrated stress of the weld during the welding process is released, and the stress is reduced to cause cracking at the weld, resulting in poor welding effect. At the same time, the second transmission shaft 44 drives the third transmission shaft 53 to rotate through the first bevel gear 51 and the second bevel gear 52, and the third transmission shaft 53 drives the second connecting block 54 to rotate, and the second connecting block 54 drives the second telescopic rod 55 and the third connecting block 56 to rotate, and at the same time, the second telescopic rod 55 and the third spring 58 perform telescopic buffering, and then the third connecting block 56 drives the grinding wheel 57 to grind the weld position, so that the weld position is flat, which is convenient for subsequent boom surface painting, and prevents the raised lines at the weld from causing bubbling after painting. Thereby, effective multi-station automatic processing of the weld after the boom is welded is realized, which greatly improves the welding effect of the boom.

[0047] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A multi-station welding device for an excavator boom, comprising a mounting frame, characterized in that: A bidirectional threaded rod is rotatably connected in the mounting frame, and a plurality of sliders are matched with threads on the outer surface of the bidirectional threaded rod. A guide rod fixedly connected to the mounting frame is slidably connected in the slider, a first mounting ring is fixedly connected to one side of the slider, a second mounting ring fixedly connected to the slider is arranged behind the first mounting ring, a transmission ring is rotatably connected in the first mounting ring and the second mounting ring, a first transmission mechanism is transmission-connected to the outer surface of the transmission ring, the first transmission mechanism is used to drive the transmission ring to rotate, a plurality of welding mechanisms are arranged on the transmission ring in the first mounting ring, the welding mechanism is used to weld the boom, a surface treatment mechanism is arranged on the transmission ring in the second mounting ring, the surface treatment mechanism is used to grind and stress-relieve the welding position; The mounting frame is provided with a boom loading and fixing mechanism, which is used to load and fix the boom, and the outer surface of the bidirectional threaded rod is transmission-connected with a second transmission mechanism connected to the mounting frame, and the second transmission mechanism is used to drive the bidirectional threaded rod to rotate; The boom loading fixing mechanism includes a plurality of first electric hydraulic rods fixedly connected to the mounting frame, two mounting grooves are provided on the top of the mounting frame, a transmission plate is slidably connected in the mounting groove, a second electric hydraulic rod fixedly connected to the mounting groove is fixedly connected to one side of the transmission plate, a third electric hydraulic rod is fixedly connected to the bottom of the transmission plate, a clamping frame is fixedly connected to the bottom ends of the first electric hydraulic rod and the third electric hydraulic rod, a fourth electric hydraulic rod is fixedly connected in the clamping frame, and a clamping block is fixedly connected to one end of the fourth electric hydraulic rod; The surface treatment mechanism includes a plurality of second mounting platforms fixedly connected to a transmission ring in the second mounting ring, a second mechanical arm fixedly connected to the second mounting platform, one end of the second mechanical arm fixedly connected to a mounting box, one side of the mounting box fixedly connected to a second transmission motor, an output end of the second transmission motor fixedly connected to a second transmission shaft rotatably connected to the mounting box through a coupling, a cam fixedly sleeved on an outer surface of the second transmission shaft, a transmission block slidably connected to an outer surface of the cam, a transmission column slidably connected to the mounting box on one side of the transmission block, a first spring fixedly sleeved on an outer surface of the transmission column, a first connecting block fixedly connected to one end of the transmission column, a first telescopic rod fixedly connected to one side of the first connecting block, one end of the first telescopic rod fixedly connected to a mounting frame, a knocking wheel rotatably connected in the mounting frame, and a second spring fixedly connected to the first connecting block on an outer surface of the first telescopic rod; The outer surface of the second transmission shaft is fixedly sleeved with the first bevel gear, the outer surface of the first bevel gear is meshed with the second bevel gear, the middle of the second bevel gear is fixedly sleeved with the third transmission shaft rotatably connected to the mounting box, one end of the third transmission shaft is fixedly connected with the second connecting block, one end of the second connecting block is fixedly connected with the second telescopic rod, one end of the second telescopic rod is fixedly connected with the third connecting block, the outer surface of the second telescopic rod is fixedly sleeved with a third spring fixedly connected to the third connecting block, and one side of the third connecting block is fixedly connected with a grinding wheel.

2. According to the multi-station welding device of excavator boom of claim 1, it is characterized in that: The welding mechanism includes a plurality of first mounting platforms fixedly connected to the transmission ring inside the first mounting ring, a first mechanical arm fixedly connected to the first mounting platform, a welding head fixedly connected to the output end of the first mechanical arm, and a welding machine fixedly connected to the first mounting platform at the input end of the welding head.

3. According to the multi-station welding device of excavator boom of claim 1, it is characterized in that: The first transmission mechanism includes a first transmission motor fixedly connected to the first mounting ring and the second mounting ring. The output end of the first transmission motor is fixedly connected to the first transmission shaft through a coupling. The outer surface of the first transmission shaft is fixedly sleeved with a first gear. The outer surface of the first gear is meshedly connected with a transmission gear ring. A connecting ring fixedly connected to the transmission ring is fixedly connected inside the transmission gear ring.

4. According to the multi-station welding device of excavator boom of claim 1, it is characterized in that: A rubber buffer pad is fixedly connected to one side of the clamping block.

5. According to the multi-station welding device for excavator boom of claim 1, it is characterized in that: The second transmission mechanism includes a third motor fixedly connected to the mounting frame, the output end of the third motor is fixedly connected to the fourth transmission shaft through a coupling, the outer surface of the fourth transmission shaft is fixedly sleeved with a second gear, and the outer surface of the second gear is meshingly connected with the third gear fixedly sleeved with the bidirectional threaded rod.

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