Welding tool for piling arm of excavator

Abstract

The invention relates to the technical field of piling arm welding, in particular to an excavator piling arm welding tool which comprises a placing frame, a bracket installed in the middle of the placing frame and a moving frame arranged above the placing frame in a sliding mode, two sliding grooves are symmetrically formed in the upper side of the moving frame, and a plurality of control devices are symmetrically arranged in the two sliding grooves in a sliding mode. The control device comprises a rope, a magnetic positioning assembly is installed at the end of the rope, and the control device is used for controlling adjustment of the position of the magnetic positioning assembly. The magnetic positioning assembly comprises an electrified magnetic block; the electrified magnetic block is used for magnetically fixing the piling arm part; a limiting assembly is arranged on the electrified magnetic block and comprises a magnetic sheet, an extrusion bag, a through pipe and a telescopic extrusion pipe. By means of the magnetic attraction connecting and positioning mode, the strength can be rapidly adjusted, parts can be fixed, deformation of the parts is avoided, and meanwhile the safety in the welding process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pile driving arm welding, and in particular to a welding tool for an excavator pile driving arm. Background Art

[0002] The pile driving arm is an arm-shaped device on the excavator used for pile driving. It uses the power and hydraulic system of the excavator to sink the pile into the ground through high-frequency vibration or hydraulic pressure, so as to achieve the purpose of strengthening the foundation and supporting the building. During the forming process of the pile driving arm, multiple large parts need to be welded together, and suitable welding tooling is required.

[0003] The patent with publication number CN112676752A discloses a boom fixing welding device, including a machine base, a supporting device, a positioning clamping device, a traction device, a crossbeam device, and a welding device. The crossbeam device includes a supporting mechanism for installing a top plate clamp and a lifting mechanism for adjusting the lifting of the supporting mechanism. The use of automated positioning welding can effectively avoid deformation of the product after welding, ensure the size requirements of the product, and improve the product quality.

[0004] However, since most of the parts needed for the pile driving arm are large and heavy, a very large force needs to be applied through the clamping device to fix and transfer the parts, which not only easily causes deformation of the parts, but also makes the parts inconvenient to move, and there are also safety hazards in the process of moving the parts. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that a very large force needs to be applied to fix and transfer parts, which not only easily causes deformation of the parts, but also makes the parts inconvenient to move and there are also safety hazards in the process of moving the parts. A welding tool for an excavator pile driving arm is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A welding tool for an excavator pile driving arm, comprising: a placing frame, a bracket installed in the middle of the placing frame, and a moving frame slidably arranged above the placing frame, wherein two slide grooves are symmetrically opened on the upper side of the moving frame, and a plurality of control devices are symmetrically slidably arranged inside the two slide grooves, wherein the control device comprises a rope, and a magnetic positioning component is installed at the end of the rope, and the control device is used to control the adjustment of the position of the magnetic positioning component; The magnetic positioning assembly includes an electromagnetic block, which is used to magnetically fix the pile driving arm parts; A limit assembly is provided on the electromagnetic block, and the limit assembly includes a magnetic sheet, an extrusion bag, a through tube and a telescopic extrusion tube. The extrusion bag is fixedly installed on a side of the electromagnetic block away from the control device, the magnetic sheet is fixedly connected to a side of the extrusion bag away from the electromagnetic block, the telescopic extrusion tube is fixedly connected to an end of the electromagnetic block close to the control device, the through tube is arranged inside the electromagnetic block, and the two ends are respectively connected to the extrusion bag and the telescopic extrusion tube, the telescopic extrusion tube is sleeved on the rope and used to fix the rope.

[0007] Preferably, the mobile frame includes a mounting frame, two supporting legs, two bottom wheels and a plurality of driving wheels. The mounting frame is a horizontally arranged U-shaped frame, the two supporting legs are vertically fixedly connected to the bending part of the mounting frame, the two bottom wheels are rotatably installed at the bottom ends of the two supporting legs, the plurality of driving wheels are symmetrically installed on both sides of the bottom surface of the mounting frame, and the limited sliding is arranged on the upper side of the placement frame to drive the mounting frame to move.

[0008] Preferably, the control device also includes a frame plate, a control wheel, a lifting column, a bent arm and a traction end. The control wheel is rotatably installed at the bottom of the frame plate, and the control wheel is limitedly slidably arranged inside the slide groove. The lifting column is vertically fixedly connected to the upper end of the frame plate, and the bent arm is rotatably installed at the top of the lifting column. The traction end is installed at the execution end of the bent arm and is used for retracting and releasing ropes. The rope is arranged inside the traction end.

[0009] Preferably, the magnetic positioning assembly also includes a control module, two side panels and two side magnetic blocks. The side edge of the electromagnetic block is symmetrically provided with two mounting openings. The two side panels are fixedly mounted on the mounting openings, and the side panels are provided with through holes. The side magnetic blocks are symmetrically mounted inside the two mounting openings through stretching parts. The control module is fixedly mounted on the upper end of the electromagnetic block for controlling the power supply of the electromagnetic block and the side magnetic blocks.

[0010] Preferably, the stretching member includes an elastic shaft and a pull rope, the elastic shaft is rotatably mounted inside the mounting opening, the pull rope is arranged on the elastic shaft, and the end portion passes through the side plate and is fixedly connected to the side magnetic block.

[0011] Preferably, a current-carrying conductor is arranged inside the pull rope, and a magnetic plate is arranged on the side of the side magnetic block away from the pull rope.

[0012] Preferably, a locking assembly is provided below the through hole, and the locking assembly is used to fix the position of the draw cord inside the through hole.

[0013] Preferably, a sliding opening is provided at the bottom of the perforation, and the locking assembly includes a connecting ring and two abutment plates, the connecting ring is sleeved on the extrusion bag, the two abutment plates are vertically fixedly connected to the connecting ring, and the upper ends are slidably arranged inside the sliding opening, and the upper side of the abutment plates is provided with latch teeth.

[0014] Preferably, the extrusion capsule is in a truncated cone shape and is made of a wear-resistant material, the magnetic sheet is made of a flexible material, and the bottom of the extrusion capsule is fixedly connected to the magnetic sheet.

[0015] Preferably, the telescopic extrusion tube is composed of a plurality of interconnected annular tubes, and when the telescopic extrusion tube expands, the end of the rope is fixed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: It can perform multi-point magnetic fixation on parts of various shapes and sizes. At the same time, the fixing force of the parts can be quickly changed by changing the amount of electricity. This fixing method can quickly and safely complete the fixing of the parts without causing excessive extrusion of the parts, ensuring the appearance of the parts; the electromagnetic block is magnetically fixed to the surface of the part. When fixing, the extrusion bag will be squeezed, and the gas inside the extrusion bag will be squeezed into the telescopic extrusion tube. The telescopic extrusion tube will expand and extend, limiting the connection position of the rope and the magnetic positioning component, so that the rope remains straight, avoiding the swing of the rope during movement, and improving the stability of movement; two freely stretchable side magnetic blocks can simultaneously fix the position of the electromagnetic block The upper and lower sides or left and right sides are magnetically fixed, thereby adjusting the fixed center of gravity, increasing the force points during the lifting process, dispersing gravity and transferring the force center of gravity, improving the stability of the entire part fixation, reducing the shaking of the part during movement and welding, and improving the stability during welding; the electromagnetic block and the magnetic sheet are squeezed to make the back plate slide inside the sliding mouth, and the pull rope is contacted and fixed through the clamping teeth, so that the pull rope is clamped inside the perforation to complete the fixation of the pull rope, avoiding the shaking of the parts during welding and transfer, and improving the stability during transfer; because the extrusion bag is an elastic air bag made of wear-resistant material, while ensuring the service life, it ensures the flexible contact between the fixed position and the part, and avoids deformation of the magnetic suction position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front structural schematic diagram of an excavator pile driving arm welding tooling proposed by the present invention; Figure 2 This is a schematic diagram of the structure of a placement frame for an excavator pile driving arm welding tooling proposed by the present invention; Figure 3 This is a schematic diagram of the unfolded structure of a placement frame and a moving frame of a welding tooling for an excavator pile driving arm proposed by the present invention; Figure 4 This is a schematic structural diagram of a magnetic positioning assembly of an excavator pile driving arm welding tooling proposed by the present invention; Figure 5 This is a schematic diagram of the structure of a control device for an excavator pile driving arm welding tooling proposed by the present invention; Figure 6This is a schematic diagram of the structure of a limit assembly of an excavator pile driving arm welding tooling proposed by the present invention; Figure 7 This is a schematic diagram of the internal structure of a magnetic positioning assembly of an excavator pile driving arm welding tooling proposed by the present invention; Figure 8 This is a schematic diagram of the structure of a tensile member of a welding tooling for an excavator pile driving arm proposed by the present invention; Fig. 9 The present invention is a schematic diagram of the locking assembly structure of an excavator pile driving arm welding tooling.

[0018] In the figure: 1. placement rack; 2. mobile rack; 21. mounting rack; 22. support leg; 23. bottom wheel; 24. driving wheel; 3. control device; 31. rope; 32. rack plate; 33. control wheel; 34. lifting column; 35. bending arm; 36. traction end; 4. magnetic positioning assembly; 41. electromagnetic block; 42. control module; 43. side plate; 44. side magnetic block; 5. limit assembly; 51. magnetic sheet; 52. extrusion bag; 53. through pipe; 54. telescopic extrusion tube; 6. stretching member; 61. elastic shaft rod; 62. pull rope; 7. locking assembly; 71. connecting ring; 72. stop plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] The terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present invention are only for the convenience of description and are not used to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of the present invention without substantially changing the technical content.

[0021] Reference Figure 1-Figure 9 , a welding tool for an excavator pile driving arm, comprising: a placing frame 1, a bracket installed in the middle of the placing frame 1 and a mobile frame 2 slidably arranged above the placing frame 1, two slide grooves are symmetrically opened on the upper side of the mobile frame 2, and a plurality of control devices 3 are symmetrically slidably arranged inside the two slide grooves, the control device 3 comprises a rope 31, a magnetic positioning component 4 is installed at the end of the rope 31, and the control device 3 is used to control the adjustment of the position of the magnetic positioning component 4; The magnetic positioning assembly 4 includes an electromagnetic block 41, and the electromagnetic block 41 is used to magnetically fix the pile driving arm parts; A limit assembly 5 is provided on the electromagnetic block 41, and the limit assembly 5 includes a magnetic sheet 51, an extrusion capsule 52, a through tube 53 and a telescopic extrusion tube 54. The extrusion capsule 52 is fixedly mounted on a side of the electromagnetic block 41 away from the control device 3, the magnetic sheet 51 is fixedly connected to a side of the extrusion capsule 52 away from the electromagnetic block 41, the telescopic extrusion tube 54 is fixedly connected to an end of the electromagnetic block 41 close to the control device 3, the through tube 53 is arranged inside the electromagnetic block 41, and the two ends are respectively connected to the extrusion capsule 52 and the telescopic extrusion tube 54, the telescopic extrusion tube 54 is sleeved on the rope 31, and is used to fix the rope 31.

[0022] In the embodiment of the application of the above technical solution, the position of the electromagnetic block 41 can be quickly changed by controlling the control device 3, so that parts of various shapes and sizes can be fixed by multi-point magnetic attraction. At the same time, the fixing force of the parts can be quickly changed by changing the size of the electric power. This fixing method can quickly and safely fix the parts without causing excessive squeezing of the parts, thereby ensuring the appearance of the parts.

[0023] However, after the electromagnetic block 41 is connected by the rope 31, the position of the connection point will shake during the movement of the part, affecting the safety and stability of welding. When the electromagnetic block 41 is not energized, the magnetic positioning component 4 is first adsorbed on the surface of the part through the magnetic sheet 51 to complete the preliminary positioning. When the position is determined, the electromagnetic block 41 is energized, and the electromagnetic block 41 is magnetically fixed to the surface of the part. When fixed, the extrusion bag 52 will be squeezed, and the gas inside the extrusion bag 52 will be squeezed into the telescopic extrusion tube 54. The telescopic extrusion tube 54 will expand and extend, limiting the connection position of the rope 31 and the magnetic positioning component, so that the rope 31 remains straight, avoiding the swing of the rope 31 during movement, and improving the stability of movement.

[0024] The present invention uses a magnetic connection and positioning method, which can not only quickly adjust the strength to complete the fixation of parts and avoid deformation of parts, but also improve the safety during the welding process.

[0025] The preferred technical solution in this embodiment is: Reference Figure 1-3 The mobile frame 2 includes a mounting frame 21, two supporting legs 22, two bottom wheels 23 and a plurality of driving wheels 24. The mounting frame 21 is a horizontally arranged U-shaped frame. The two supporting legs 22 are vertically fixedly connected to the bending part of the mounting frame 21. The two bottom wheels 23 are rotatably installed at the bottom ends of the two supporting legs 22 respectively. The plurality of driving wheels 24 are symmetrically installed on both sides of the bottom surface of the mounting frame 21, and the limited sliding is arranged on the upper side of the placement frame 1 to drive the mounting frame 21 to move.

[0026] Since the parts required for welding the pile driving arm are of large mass and volume, the placing frame 1 will be subjected to increased pressure during the lifting and transfer process. By providing the mobile frame 2, part of the weight of the parts is shared, thereby avoiding deformation of the placing frame 1.

[0027] During use, the movement of the driving wheel 24 is controlled to drive the mounting frame 21 to slide. After the mounting frame 21 is moved out, the parts are magnetically fixed by the multiple magnetic positioning components 4 on the mounting frame 21. After the parts are moved up, the mounting frame 21 is moved to the upper side of the placement frame 1, and the parts to be welded are transferred to the bracket to support the bottom of the parts, thereby facilitating the adjustment of the position of the parts and reducing the force on the magnetic positioning component 4 to ensure the welding of the parts.

[0028] Reference Figure 4-5 The control device 3 also includes a frame plate 32, a control wheel 33, a lifting column 34, a curved arm 35 and a traction end 36. The control wheel 33 is rotatably installed at the bottom of the frame plate 32, and the control wheel 33 is limitedly slidably arranged inside the slide groove. The lifting column 34 is vertically fixedly connected to the upper end of the frame plate 32. The curved arm 35 is rotatably installed at the top of the lifting column 34. The traction end 36 is installed at the execution end of the curved arm 35 for retracting and releasing the rope 31. The rope 31 is arranged inside the traction end 36.

[0029] Since different parts have different sizes and different positions to be moved, the control wheel 33 is used to drive the entire control device 3 to move on the mounting frame 21, so that parts of different lengths can be fixed. Then, by rotating the bending arm 35, the traction end 36 is bent and rotated, and the rope 31 is retracted and released through the traction end 36, so that the parts can be driven to move up and down, and the parts to be welded can be lifted, and the parts can be quickly transferred to the position to be welded, thereby improving the rapid transportation of parts of different sizes and shapes.

[0030] Reference Figure 6-8 The magnetic positioning assembly 4 further includes a control module 42, two side plates 43 and two side magnetic blocks 44. The electromagnetic block 41 has two symmetrical mounting openings on its side. The two side plates 43 are fixedly mounted on the mounting openings, and the side plates 43 are provided with through holes. The side magnetic blocks 44 are symmetrically mounted inside the two mounting openings through the stretching member 6. The control module 42 is fixedly mounted on the upper end of the electromagnetic block 41 to control the power supply of the electromagnetic block 41 and the side magnetic blocks 44. The stretching member 6 includes an elastic shaft 61 and a pull rope 62. The elastic shaft 61 is rotatably mounted inside the mounting opening. The pull rope 62 is arranged on the elastic shaft 61, and the end of the pull rope passes through the side plate 43 and is fixedly connected to the side magnetic block 44. A conducting wire is disposed inside the pull rope 62 , and a magnetic plate is disposed on a side of the side magnetic block 44 away from the pull rope 62 .

[0031] Since the lengths of parts of different types of pile driving arms are different, the electromagnetic block 41 used for individual fixing is subjected to greater force, and during the process of part transfer and welding, it is easy to cause the parts to shake and shift, resulting in a shift in the center of gravity, affecting the welding efficiency.

[0032] By arranging two freely stretchable side magnetic blocks 44 on both sides of the electromagnetic block 41, the upper and lower sides or the left and right sides of the fixed position of the electromagnetic block 41 can be magnetically fixed at the same time, thereby adjusting the fixed center of gravity, increasing the force points during the lifting process, dispersing gravity and shifting the force center of gravity, thereby improving the stability of the fixation of the entire part, reducing the shaking during part movement and welding, and improving the stability during welding.

[0033] During the welding process, the side magnetic block 44 is pulled out from the side plate 43 by pulling the pull rope 62, and the side magnetic block 44 is adhered to the position where it needs to be pulled. At the same time, the pull rope 62 will automatically reel in the excess wire under the elastic rotation of the elastic shaft 61, thereby ensuring that the pull rope 62 is in a straight state. When the part is started to be lifted and transferred, the side magnetic block 44 is energized to generate a strong magnetic force to magnetically fix the part. When the transfer welding is completed, the side magnetic block 44 is separated from the part by cutting off the power, and the pull rope 62 automatically contracts to complete the recovery of the side magnetic block 44, which is convenient for use.

[0034] Reference Fig. 9 A locking assembly 7 is provided below the perforation, and the locking assembly 7 is used to fix the position of the pull rope 62 inside the perforation; A sliding opening is provided at the bottom of the perforation, and the locking assembly 7 includes a connecting ring 71 and two abutment plates 72. The connecting ring 71 is sleeved on the extrusion bag 52, and the two abutment plates 72 are vertically fixedly connected to the connecting ring 71, and the upper ends are slidably arranged inside the sliding opening, and the upper side of the abutment plates 72 is provided with latch teeth.

[0035] Since collision and shaking may occur during the welding process, if the pull rope 62 is not fixed, it is easy to cause shaking, which poses a safety hazard.

[0036] When the positions of the electromagnetic block 41 and the side magnetic block 44 are fixed, the control module 42 controls the electromagnetic block 41 and the side magnetic block 44 to be energized, thereby completing the magnetic fixation of the parts. When the electromagnetic block 41 starts to be energized, the electromagnetic block 41 and the magnetic sheet 51 will be squeezed, so that the abutment plate 72 slides inside the sliding mouth and is fixed to the pull rope 62 through the locking teeth, so that the pull rope 62 is clamped inside the perforation, completing the fixation of the pull rope 62, avoiding the shaking of the parts during welding and transfer, and improving the stability during the transfer process.

[0037] Reference Fig. 9 , the extrusion capsule 52 is truncated cone-shaped and made of wear-resistant material, the magnetic sheet 51 is made of flexible material, and the bottom of the extrusion capsule is fixedly connected to the magnetic sheet 51; The telescopic extrusion tube 54 is composed of a plurality of interconnected annular tubes, and when the telescopic extrusion tube 54 expands, the end of the rope 31 is fixed.

[0038] The truncated cone-shaped extrusion bag 52 can quickly introduce the internal gas of the extrusion bag 52 into the telescopic extrusion tube 54 through the through pipe 53 when the electromagnetic block 41 and the magnetic sheet 51 are squeezed. At the same time, since the extrusion bag 52 is an elastic air bag made of wear-resistant material, while ensuring the service life, it ensures flexible contact between the fixed position and the parts, avoiding deformation of the magnetic suction position.

[0039] After the extrusion bag 52 introduces gas into the telescopic extrusion tube 54, the telescopic extrusion tube 54 will expand and extend, limiting the connection position between the rope 31 and the magnetic positioning assembly, so that the rope 31 remains straight, avoiding the rope 31 from swinging during movement, and improving the stability of movement.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An excavator pile driving arm welding tool, comprising: A placement rack (1), a bracket installed in the middle of the placement rack (1), and a movable rack (2) slidably arranged above the placement rack (1), characterized in that two slide grooves are symmetrically opened on the upper side of the movable rack (2), and a plurality of control devices (3) are symmetrically slidably arranged inside the two slide grooves, and the control device (3) includes a rope (31), and a magnetic positioning component (4) is installed at the end of the rope (31), and the control device (3) is used to control the adjustment of the position of the magnetic positioning component (4); The magnetic positioning assembly (4) comprises an electromagnetic block (41), and the electromagnetic block (41) is used to magnetically fix the pile driving arm parts; A limit assembly (5) is provided on the electromagnetic block (41), the limit assembly (5) comprising a magnetic sheet (51), an extrusion capsule (52), a through tube (53) and a telescopic extrusion tube (54); the extrusion capsule (52) is fixedly mounted on a side of the electromagnetic block (41) away from the control device (3); the magnetic sheet (51) is fixedly connected to a side of the extrusion capsule (52) away from the electromagnetic block (41); the telescopic extrusion tube (54) is fixedly connected to an end of the electromagnetic block (41) close to the control device (3); the through tube (53) is provided inside the electromagnetic block (41), and its two ends are respectively connected to the extrusion capsule (52) and the telescopic extrusion tube (54); the telescopic extrusion tube (54) is sleeved on the rope (31) and is used to fix the rope (31).

2. The excavator pile driving arm welding tool according to claim 1, characterized in that: The mobile frame (2) comprises a mounting frame (21), two supporting legs (22), two bottom wheels (23) and a plurality of driving wheels (24); the mounting frame (21) is a horizontally arranged U-shaped frame; the two supporting legs (22) are vertically fixedly connected to the bending part of the mounting frame (21); the two bottom wheels (23) are rotatably mounted on the bottom ends of the two supporting legs (22); the plurality of driving wheels (24) are symmetrically mounted on both sides of the bottom surface of the mounting frame (21); and the limiting sliding is arranged on the upper side of the placement frame (1) to drive the mounting frame (21) to move.

3. The excavator pile driving arm welding tool according to claim 1, characterized in that: The control device (3) further comprises a frame plate (32), a control wheel (33), a lifting column (34), a bent arm (35) and a traction end (36); the control wheel (33) is rotatably mounted on the bottom of the frame plate (32), and the control wheel (33) is limitedly slidably arranged inside a slide groove; the lifting column (34) is vertically fixedly connected to the upper end of the frame plate (32); the bent arm (35) is rotatably mounted on the top of the lifting column (34); the traction end (36) is mounted on the execution end of the bent arm (35) and is used for retracting and releasing a rope (31); and the rope (31) is arranged inside the traction end (36).

4. The excavator pile driving arm welding tool according to claim 1, characterized in that: The magnetic positioning assembly (4) further comprises a control module (42), two side plates (43) and two side magnetic blocks (44); the electromagnetic block (41) is symmetrically provided with two mounting openings on its side; the two side plates (43) are fixedly mounted on the mounting openings, and the side plates (43) are provided with through holes; the side magnetic blocks (44) are symmetrically mounted inside the two mounting openings via a stretching member (6); the control module (42) is fixedly mounted on the upper end of the electromagnetic block (41) and is used to control the power supply of the electromagnetic block (41) and the side magnetic blocks (44).

5. The excavator pile driving arm welding tool according to claim 4, characterized in that: The stretching member (6) comprises an elastic shaft (61) and a pull rope (62); the elastic shaft (61) is rotatably mounted inside the mounting opening; the pull rope (62) is arranged on the elastic shaft (61) and has an end portion passing through the side plate (43) and fixedly connected to the side magnetic block (44).

6. The excavator pile driving arm welding tool according to claim 5, characterized in that: An electric conducting wire is arranged inside the pull rope (62), and a magnetic plate is arranged on a side of the side magnetic block (44) away from the pull rope (62).

7. The excavator pile driving arm welding tool according to claim 4, characterized in that: A locking assembly (7) is provided below the through hole, and the locking assembly (7) is used to fix the position of the pull rope (62) inside the through hole.

8. The excavator pile driving arm welding tool according to claim 7, characterized in that: A sliding opening is provided at the bottom of the perforation, and the locking assembly (7) comprises a connecting ring (71) and two abutment plates (72). The connecting ring (71) is sleeved on the extrusion bag (52), and the two abutment plates (72) are vertically fixedly connected to the connecting ring (71), and the upper ends are slidably arranged inside the sliding opening, and the upper sides of the abutment plates (72) are provided with latch teeth.

9. The excavator pile driving arm welding tool according to claim 1, characterized in that: The extrusion capsule (52) is in a truncated cone shape and is made of a wear-resistant material; the magnetic sheet (51) is made of a flexible material; and the bottom of the extrusion capsule is fixedly connected to the magnetic sheet (51).

10. The excavator pile driving arm welding tool according to claim 1, characterized in that: The telescopic extrusion tube (54) is composed of a plurality of interconnected annular tubes, and when the telescopic extrusion tube (54) is expanded, the end of the rope (31) is fixed.

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