Automatic welding mechanism for tower crane standard section

Abstract

The invention discloses an automatic welding mechanism for tower crane standard knots.The automatic welding mechanism comprises a supporting rod placing mechanism, a supporting rod alignment mechanism, a clamping mechanism, a spot welding mechanism and a welding mechanism, the supporting rod placing mechanism is arranged on one side of the supporting rod alignment mechanism, and a set of various supporting rods needed by the standard knotsare placed on the supporting rod placing mechanism; a clamping mechanism is arranged on one side of the supporting rod alignment mechanism, namely a six-axis industrial mechanical arm, supporting rods are clamped and carried through the six-axis industrial mechanical arm, and a rotary clamping tool is installed on the ground; and therefore, the machining efficiency of the standard knot is improved, and manual operation is not needed.

Description

Technical Field

[0001] The invention relates to the field of automated processing equipment for tower crane standard sections, and in particular to an automated welding mechanism for tower crane standard sections. Background Art

[0002] In the past, the processing of standard sections of tower cranes mainly involved installing the four main limbs in a rectangular array on a rotating clamping fixture through a rotating clamping fixture, manually placing the support rods between the main limbs, and having welding workers weld the support rods to the main limbs. During welding, one worker was required to place the rods while another worker was required to weld. This required the cooperation of two workers, which resulted in low welding efficiency and high labor costs. When the standard section was large, the workers could not lift the support rods, so they needed to use a gantry truck to transport and place the rods, which was even more inefficient. Summary of the invention

[0003] In view of the above-mentioned deficiencies of the prior art, the present invention proposes an automated welding mechanism for a tower crane standard section, which facilitates the automatic assembling and welding of support rods, thereby improving the processing efficiency of the standard section without manual operation.

[0004] To achieve the above-mentioned purpose, the scheme of the present invention is as follows: an automated welding mechanism for a standard section of a tower crane, comprising a support rod placing mechanism, a support rod alignment mechanism, a clamping mechanism, a spot welding mechanism and a welding mechanism, wherein a support rod placing mechanism is arranged on one side of the support alignment mechanism, a group of multiple support rods required for the standard section are placed on the support rod placing mechanism, a clamping mechanism is arranged on one side of the support rod alignment mechanism, the clamping mechanism is a six-axis industrial robot arm, the support rods are clamped and transported by the six-axis industrial robot arm, a rotary clamping tool is installed on the ground, the rotary clamping tool clamps four main limbs, the support rods are clamped by the six-axis industrial robot arm and swung on the main limbs, spot welding mechanisms that can be lifted and lowered are arranged at the upper and lower ends of the rotary clamping tool, the spot welding mechanism performs spot welding on the support rods and the main limbs, a welding mechanism is arranged on one side of the rotary clamping tool, the welding mechanism is a welding robot, and full welding is performed by the welding mechanism.

[0005] Preferably, the support rod placement mechanism includes a mounting seat, a placement groove and a slot. A mounting seat is arranged on the ground, and two placement grooves are arranged on the mounting seat. A positive support rod is placed in the placement groove, and a slot is also arranged on the mounting seat, in which the oblique support rod is inserted into the slot, and the positive support rod in the placement groove and the oblique support rod in the slot are clamped by a six-axis industrial robot arm; the support rod alignment mechanism includes an alignment plate, a lifting assembly and an alignment module. An alignment plate is installed on the ground on one side of the mounting seat, multiple groups of lifting assemblies are installed at one end of the alignment plate, and multiple groups of alignment modules are installed at the other end of the alignment plate, wherein each group of alignment modules is arranged opposite to the lifting assembly, and multiple groups of V-shaped brackets arranged side by side are installed on the alignment plate, and the V-shaped brackets are located between the alignment module and the lifting assembly.

[0006] Preferably, the alignment module includes a rotating disk, a semi-cylindrical alignment head and a cylindrical bevel alignment head. Multiple groups of rotating disks driven by stepper motors are installed on the alignment plate, and corresponding semi-cylindrical alignment heads or cylindrical bevel alignment heads are installed on the rotating disk. The semi-cylindrical alignment heads or the cylindrical bevels are used to align the positive support rods and the oblique support rods respectively. The jacking assembly is a lifting plate driven by a cylinder. The top push-end surfaces of the positive support rods and the oblique support rods are aligned with the alignment module through jacking, thereby ensuring the position of the six-axis industrial robot arm to clamp the positive support rods and the oblique support rods.

[0007] Preferably, a positioning plate or a positioning bevel is also installed on the rotating disk, wherein the positioning plane and the semi-cylindrical alignment head are installed on the same rotating disk, and the positioning bevel and the cylindrical bevel alignment head are installed on the same rotating disk, and the alignment module is switched by rotating the rotating disk to cope with different standard sections.

[0008] Preferably, the spot welding mechanism is divided into a top spot welding assembly, a bottom spot welding assembly and a welding frame, wherein the top spot welding assembly and the bottom spot welding assembly are respectively installed above and below the rotary clamping tooling, the top spot welding mechanism and the bottom spot welding mechanism both include a sliding track, a welding slide, a lead screw and a spot welding module driven by a stepper motor, the sliding track of the top spot welding assembly is installed above the rotary clamping tooling through a suspension rod, the bottom spot welding assembly is installed on the ground and above the bottom spot welding assembly clamping tooling, a translation assembly is arranged between the sliding track and the ground or the suspension rod, a welding slide that translates on the sliding track is installed on each sliding track, a lead screw is installed between the welding slide and the sliding track, the welding slide is driven to move by the lead screw, a spot welding module is installed on the welding slide, the spot welding module includes a spot welding pen, a telescopic rod and a swing assembly, a telescopic rod is installed on each welding slide, a welding pen is hinged at each end that is telescopic away from the welding slide, a telescopic assembly is arranged between the telescopic rod and the welding slide, and a swing assembly is arranged between the telescopic rod and the welding pen.

[0009] Preferably, the rotary installation tooling includes a rotating component and a clamping head, wherein the rotating component is divided into two groups and the two groups of rotating components are arranged opposite to each other, the rotating component includes a rotating plate, a rotating shaft and a clamping seat, a rotating shaft is installed on the back side of the rotating plate, the rotating shaft passes through the clamping seat and the clamping seat rotates in cooperation with the rotating shaft, a motor for driving the rotating shaft to rotate is installed on the rotating shaft, a moving component is installed between the clamping seat and the ground, and the rotating component clamps the two ends of the main limb through the moving component, and a plurality of clamping heads distributed in a ring array are installed on each group of rotating components, each clamping head is divided into four clamping blocks and a clamping plate, the clamping plate slides in cooperation with the rotating component, a spring is arranged between the clamping plate and the rotating component, four slide grooves are opened on the clamping plate, a clamping block is installed in each slide groove, one end of the clamping block is on the rotating plate, an inclined groove inclined outward is opened on the clamping block, a sliding rod is stuck in the inclined groove, and the sliding rod is fixed on the inner wall of the slide groove.

[0010] Compared with the prior art, the invention has the advantages of facilitating automatic arranging and welding of support rods, thereby improving the processing efficiency of standard sections without manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a top view without installing the spot welding mechanism of the present invention.

[0012] Figure 2 It is a three-dimensional view of the support rod placement mechanism of the present invention.

[0013] Figure 3 It is a top view of the support rod alignment mechanism of the present invention.

[0014] Figure 4 It is a schematic diagram of the position of the spot welding mechanism and the standard joint of the present invention.

[0015] Figure 5 It is a schematic diagram of the top spot welding assembly of the present invention.

[0016] Figure 6 It is a schematic diagram of the rotating plate and the clamping head of the present invention.

[0017] Figure 7 It is a cross-sectional view of the clamping head of the present invention.

[0018] Figure 8 It is a schematic diagram of the rectangular rod standard section and the cylindrical standard section of the present invention.

[0019] Among them: 1. support rod placement mechanism, 2. mounting seat, 3. placement slot, 4. slot, 5. support rod alignment mechanism, 6. alignment plate, 7. lifting assembly, 8. lifting plate, 9. alignment module, 10. rotating disk, 11. semi-cylindrical alignment head, 12. cylindrical inclined alignment head, 13. positioning plate, 14. positioning inclined surface, 15. V-shaped bracket, 16. clamping mechanism, 17. six-axis industrial robot arm, 18. spot welding mechanism, 19. top spot welding assembly, 20. bottom spot welding assembly, 21. translation assembly, 22. , sliding track, 23, welding slide, 24, lead screw, 25, spot welding module, 26, spot welding pen, 27, telescopic rod, 28, telescopic assembly, 29, swing assembly, 30, welding frame, 31, welding mechanism, 32, welding robot, 33, rotary clamping fixture, 34, rotating assembly, 35, rotating plate, 36, rotating shaft, 37, clamping seat, 38, moving assembly, 39, clamping head, 40, clamping block, 41, clamping plate, 42, slide groove, 43, inclined groove, 44, sliding rod, 45, sliding rod. DETAILED DESCRIPTION

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] like Figure 1-8The invention discloses an automated welding mechanism 31 for a standard section of a tower crane, comprising a support rod placing mechanism 1, a support rod alignment mechanism 5, a clamping mechanism 16, a spot welding mechanism 18 and a welding mechanism 31, wherein a support rod placing mechanism 1 is arranged on one side of the support alignment mechanism, and a group of multiple support rods required for a standard section are placed on the support rod placing mechanism 1 (the support rods are divided into two groups, and the two groups of support rods are respectively positive support rods and oblique support rods, and the positive support rods are eight, which are mainly welded at both ends of the main limbs, and the oblique support rods are eight, which are mainly obliquely welded between the main limbs and are located between the two main support rods), and a clamping mechanism 16 is arranged on one side of the support rod alignment mechanism 5. The clamping mechanism 16 is a six-axis industrial robot arm 17, and the support rods are clamped and transported by the six-axis industrial robot arm 17. The six-axis industrial robot arm 17 first clamps the support rods on the support rod placing mechanism 1, and then the six-axis industrial robot arm 17 places the support rods on the support rod alignment mechanism The structure 5 is positioned. After the positioning is completed, the six-axis industrial robot arm 17 continues to clamp the support rod. A rotary clamping tool 33 is installed on the ground. The rotary clamping tool 33 clamps the four main limbs. The support rod that has been clamped and positioned by the six-axis industrial robot arm 17 is placed on the main limb. A spot welding mechanism 18 that can be lifted and lowered is arranged at the upper and lower ends of the rotary clamping tool 33. The spot welding mechanism 18 spot welds the support rod and the main limb. In this way, the main limb and the two ends of the support rod are fixed. The six-axis industrial robot arm 17 releases the support rod and clamps the next support rod. A welding mechanism 31 is arranged on the ground on one side of the rotary clamping tool 33 away from the three-axis industrial robot by bolt fastening. The welding mechanism 31 is the welding robot 32 currently available on the market (welding robot 32LHZ2000-C-6, welding is performed through a preset welding route). The spot-welded support rod and the main limb are fully welded by the welding mechanism 31.

[0022] The support rod placement mechanism 1 includes a mounting seat 2, a placement slot 3 and a slot 4. The mounting seat 2 is placed on the ground, and a roller is installed at the bottom of the mounting seat 2. The mounting seat 2 is moved by the roller. A positioning slot that can be lifted and lowered is installed on the ground by bolt fastening. Positioning plates are installed at both ends of the mounting seat 2 by bolt fastening. The positioning slot and the positioning plate are both trapezoidal. A hydraulic cylinder is installed between the positioning slot and the ground by bolt fastening. The jacking of the positioning slot is realized by the hydraulic cylinder. When the positioning plate of the mounting seat 2 moves to the top of the positioning slot, the hydraulic cylinder jacks up, so that the positioning plate is stuck in the positioning slot to complete the positioning and the mounting seat 2 cannot move; two placement slots 3 arranged side by side are fixed on the top surface of the mounting seat 2 by welding, and a notch is opened on the outer wall of the placement slot 3 for the six-axis industrial robot arm 17 to extend into, four positive support rods are placed in each placement slot 3 and the four positive support rods are arranged up and down, and a plurality of slots 4 arranged side by side are installed on the top surface of the mounting seat 2 by bolt fastening, in which the oblique support rods are vertically inserted into In the slot 4, the six-axis industrial robot arm 17 is used to clamp the positive support rod in the placement slot 3 and the oblique support rod in the slot 4; the support rod alignment mechanism 5 includes an alignment plate 6, a jacking assembly 7 and an alignment module 9, an alignment plate 6 is installed on the ground on one side of the mounting seat 2 by bolt fastening, a plurality of groups of jacking assemblies 7 are installed on one end of the alignment plate 6 by bolt fastening, and a plurality of groups of alignment modules 9 are installed on the other end of the alignment plate 6 by bolt fastening, wherein each group of alignment modules 9 is arranged opposite to the jacking assembly 7, A plurality of groups of V-shaped brackets 15 arranged side by side are installed on the alignment plate 6 by bolt fastening. The V-shaped bracket 15 is located between the alignment module 9 and the jacking assembly 7. The support rod is placed on the V-shaped bracket 15 during positioning. The support rod on the V-shaped bracket 15 is pushed toward the alignment module 9 by the jacking assembly 7. In this way, one end of the support rod contacts the alignment module 9 for positioning. In this way, the position of the support rod is limited, which is convenient for the six-axis industrial robot arm 17 to clamp the support rod and facilitate the lap welding of the support rod and the main limb.

[0023] The alignment module 9 includes a rotating disk 10, a semi-cylindrical alignment head 11 and a cylindrical bevel alignment head 12. A plurality of rotating disks 10 driven by a stepper motor are installed on the alignment plate 6. The rotating disk 10 is installed on the alignment plate 6 through a bearing. When the main limb is a cylinder, a corresponding semi-cylindrical alignment head 11 or a cylindrical bevel alignment head 12 is installed on the rotating disk 10, that is, the rotating disk 10 is divided into two groups, and a semi-cylindrical alignment head 11 and a cylindrical bevel alignment head 12 are respectively installed on each group of rotating disks 10 by bolt fastening (the semi-cylindrical alignment head 11 is mainly used for alignment of the positive support rod, and the cylindrical bevel alignment head 12 is mainly used for alignment of the oblique support rod). The top surfaces of the positive support rods and the oblique support rods are respectively aligned. The lifting assembly 7 is a lifting plate 8 driven by a cylinder. The cylinder body that drives the lifting plate 8 to move is installed on the alignment plate 6 by bolts, and the piston rod of the cylinder is fixed to the back of the lifting plate 8 by bolt fastening. The top surfaces of the positive support rods and the oblique support rods are aligned with the alignment module 9 by lifting, so as to ensure that the six-axis industrial robot arm 17 clamps the positions of the positive support rods and the oblique support rods. When positioning, the support rods are first placed in the V-shaped bracket 15, and then the lifting plate 8 pushes the support rods toward the alignment module 9, so that the end of the support rod away from the lifting plate 8 is in close contact with the alignment module 9, thereby completing the positioning of the support rods, which is convenient for subsequent placement.

[0024] When the main limb is a rectangular rod, a positioning plate 13 or a positioning slope 14 is also installed on the semi-cylinder of the rotating disk 10, wherein the positioning plane and the semi-cylindrical alignment head 11 are installed on the same rotating disk 10 by bolt fastening, and the positioning slope 14 and the cylindrical slope alignment head 12 are installed on the same rotating disk 10 by bolt fastening, and the alignment module 9 is switched by rotating the rotating disk 10 to cope with different standard sections.

[0025] The spot welding mechanism 18 is divided into a top spot welding assembly 19, a bottom spot welding assembly 20 and a welding frame 30, wherein the top spot welding assembly 19 and the bottom spot welding assembly 20 are respectively installed above and below the rotating clamping fixture 33, and the top spot welding mechanism 18 and the bottom spot welding mechanism 18 both include a sliding track 22, a welding slide 23, a lead screw 24 and a spot welding module 25 driven by a stepper motor, the sliding track 22 of the top spot welding assembly 19 is installed above the rotating clamping fixture 33 through a suspension rod, the bottom spot welding assembly 20 is installed on the ground and above the clamping fixture of the bottom spot welding assembly 20, and a translation assembly 21 is arranged between the sliding track 22 and the ground or the suspension rod, and the translation assembly 21 includes a guide rod and a guide seat, wherein two guide rods arranged side by side are installed on the inner wall of the roof and the ground by bolts, a guide seat moving on the guide rod is sleeved on the guide rod, a hydraulic cylinder is installed between the guide seat and the guide rod by bolts, and the movement of the guide seat is realized by the hydraulic cylinder, a suspension rod is fixed on the guide seat on the inner wall of the roof by welding, a welding slide 23 that moves horizontally on the sliding rail 22 is installed on each sliding track 22, a lead screw 24 is installed between the welding slide 23 and the sliding track 22, the welding slide 23 is driven to move by the lead screw 24, the lead screw 24 passes through the welding slide 23, and the lead screw 24 and the welding slide 23 are threadedly matched The two ends of the lead screw 24 are installed on the sliding track 22 through bearings, one end of the lead screw 24 is connected to the output shaft of the motor by welding, and the lead screw is driven by the motor to rotate, so that the welding slide 23 can be moved. A spot welding module 25 is installed on the welding slide 23, and the spot welding module 25 includes a spot welding pen 26, a telescopic rod 27 and a swing assembly 29. A telescopic rod 27 is installed at the bottom of each welding slide 23, and a welding pen is hinged at one end of each telescopic rod 27 away from the welding slide 23. A telescopic assembly 28 is arranged between the telescopic rod 27 (the telescopic rod 27 is a straight rod) and the welding slide 23, and the telescopic rod 27 passes through the welding slide 23 upward. Extension, the telescopic component 28 is a cylinder, the cylinder body of the telescopic component 28 is installed on the welding slide 23 by bolts, the piston rod of the telescopic component 28 is installed on the top surface of the telescopic rod 27 by bolts, the telescopic rod 27 is lifted and lowered by the telescopic component 28, a swing component 29 is arranged between the telescopic rod 27 and the welding pen, the swing component 29 includes a pull rod and a moving ring, wherein a moving ring is sleeved on each telescopic rod 27, a pull rod is hinged between the moving ring and the welding pen, a spring is fixed between the moving ring and the welding slide 23 by welding, when the telescopic rod 27 moves toward the main limb, the welding pen swings upward, and the welding pen is against the contact point between the support rod and the main limb for welding.

[0026] The rotary assembly tooling includes a rotary assembly 34 and a clamping head 39, wherein the rotary assembly 34 is divided into two groups and the two groups of rotary assemblies 34 are arranged opposite to each other, and the four main limbs are clamped between the two groups of rotary assemblies 34, and the main limbs are rotated by the rotary assembly 34. The rotary assembly 34 includes a rotary plate 35, a rotating shaft 36 and a clamping seat 37. The rotating shaft 36 is installed on the back of the rotary plate 35 by welding, and the rotating shaft 36 passes through the clamping seat 37, and the clamping seat 37 and the rotating shaft 36 are rotatably matched (the rotating shaft 36 is installed on the clamping seat 37 through a bearing and a bearing seat, and the rotating shaft 36 rotates with the clamping seat 37), and a driving shaft 36 is installed on the rotating shaft 36. 6 rotating motor, the output shaft of the motor is connected to the rotating shaft 36 by welding, so that the rotation of the rotating shaft 36 is realized, and a moving assembly 38 is installed between the clamping seat 37 and the ground (the moving assembly 38 includes a moving track and a moving slider, wherein the moving track is multi-track and the multi-track moving track is fixed to the ground by bolts, and a moving slider on the moving track is clamped on the moving track, and a hydraulic cylinder is installed between the moving slider and the ground by bolts, and the rotating assembly 34 is lifted by the hydraulic cylinder to complete the clamping of the main limbs), and the rotating assembly 34 is clamped at both ends of the main limbs by the moving assembly 38, and each group Four clamping heads 39 distributed in a circular array are installed on the front of the rotating plate 35 of the rotating assembly 34. The multiple clamping heads 39 rotate around the rotating shaft 36 as the central axis. Each clamping head 39 is divided into four clamping blocks 40 and a clamping plate 41. The clamping plate 41 is slidably matched with the rotating assembly 34 (a sliding rod is fixed on the back of the clamping plate 41 by welding, and the sliding rod passes through the rotating plate 35 for sliding matching). A spring is arranged between the clamping plate 41 and the rotating assembly 34. The spring is sleeved on the sliding rod 45 and the spring is located between the clamping plate 41 and the rotating plate 35. Four slide grooves 42 are opened on the clamping plate 41, and the four slide grooves 42 are in a circular shape. The clamping block 40 is distributed in an array, and a clamping block 40 is installed in each slide groove 42. The clamping block 40 slides in the slide groove 42, and one end of the clamping block 40 is against the rotating plate 35. An inclined groove 43 inclined to the outside is opened on the clamping block 40, and a sliding rod 44 is inserted in the inclined groove 43. The sliding rod 44 is fixed to the inner wall of the slide groove 42 by welding. When the rotating plate 35 clamps the main limb, the clamping plate 41 moves toward the rotating plate 35. Since the clamping block 40 is pushed outward of the clamping plate 41, the clamping block 40 moves inward to clamp the main limb due to the inclined groove 43 and the sliding rod 44, thus achieving clamping.

Claims

1. An automated welding mechanism for a tower crane standard section, comprising a support rod placement mechanism, a support rod alignment mechanism, a clamping mechanism, a spot welding mechanism and a welding mechanism, characterized in that: A support rod placing mechanism is arranged on one side of the support alignment mechanism, and a group of various support rods required for a standard section are placed on the support rod placing mechanism; a clamping mechanism is arranged on one side of the support rod alignment mechanism, and the clamping mechanism is a six-axis industrial robot arm, which is used to clamp and transport the support rods; a rotary clamping fixture is installed on the ground, which clamps the four main limbs, and the support rods are clamped and placed on the main limbs by the six-axis industrial robot arm; spot welding mechanisms that can be raised and lowered are arranged at the upper and lower ends of the rotary clamping fixture, and the spot welding mechanism spot-welds the support rods and the main limbs; a welding mechanism is arranged on one side of the rotary clamping fixture, and the welding mechanism is a welding robot, which performs full welding.

2. The automatic welding mechanism for a tower crane standard section according to claim 1 is characterized in that: The support rod placement mechanism includes a mounting seat, a placement groove and a slot. A mounting seat is arranged on the ground. Two placement grooves are arranged on the mounting seat. A positive support rod is placed in the placement groove. A slot is also arranged on the mounting seat. The oblique support rod is inserted into the slot. The positive support rod in the placement groove and the oblique support rod in the slot are clamped by a six-axis industrial robot arm; the support rod alignment mechanism includes an alignment plate, a lifting assembly and an alignment module. An alignment plate is installed on the ground on one side of the mounting seat. Multiple groups of lifting assemblies are installed at one end of the alignment plate, and multiple groups of alignment modules are installed at the other end of the alignment plate, wherein each group of alignment modules is arranged opposite to the lifting assembly. Multiple groups of V-shaped brackets arranged side by side are installed on the alignment plate, and the V-shaped brackets are located between the alignment modules and the lifting assemblies.

3. The automatic welding mechanism for a tower crane standard section according to claim 2 is characterized in that: The alignment module includes a rotating disk, a semi-cylindrical alignment head and a cylindrical inclined surface alignment head. Multiple groups of rotating disks driven by stepper motors are installed on the alignment plate, and corresponding semi-cylindrical alignment heads or cylindrical inclined surface alignment heads are installed on the rotating disk. The semi-cylindrical alignment heads or cylindrical inclined surfaces are used to align the positive support rods and the oblique support rods respectively. The jacking assembly is a lifting plate driven by a cylinder. The top push-end surfaces of the positive support rods and the oblique support rods are aligned with the alignment module through jacking, thereby ensuring the position of the six-axis industrial robot arm to clamp the positive support rods and the oblique support rods.

4. The automatic welding mechanism for a tower crane standard section according to claim 3 is characterized in that: A positioning plate or a positioning bevel is also installed on the rotating disk, wherein the positioning plane and the semi-cylindrical alignment head are installed on the same rotating disk, and the positioning bevel and the cylindrical bevel alignment head are installed on the same rotating disk. The alignment module is switched by rotating the rotating disk to cope with different standard sections.

5. The automatic welding mechanism for a tower crane standard section according to claim 4 is characterized in that: The spot welding mechanism is divided into a top spot welding assembly, a bottom spot welding assembly and a welding frame, wherein the top spot welding assembly and the bottom spot welding assembly are respectively installed above and below the rotary clamping fixture, and the top spot welding mechanism and the bottom spot welding mechanism both include a sliding track, a welding slide, a lead screw and a spot welding module driven by a stepper motor, the sliding track of the top spot welding assembly is installed above the rotary clamping fixture through a suspension rod, the bottom spot welding assembly is installed on the ground and above the bottom spot welding assembly clamping fixture, a translation assembly is arranged between the sliding track and the ground or the suspension rod, a welding slide that translates on the sliding track is installed on each sliding track, a lead screw is installed between the welding slide and the sliding track, the welding slide is driven to move by the lead screw, a spot welding module is installed on the welding slide, the spot welding module includes a spot welding pen, a telescopic rod and a swing assembly, a telescopic rod is installed on each welding slide, a welding pen is hinged at each end that is telescopic away from the welding slide, a telescopic assembly is arranged between the telescopic rod and the welding slide, and a swing assembly is arranged between the telescopic rod and the welding pen.

6. The automatic welding mechanism for a tower crane standard section according to claim 5, characterized in that: The rotary installation tooling includes a rotating component and a clamping head, wherein the rotating component is divided into two groups and the two groups of rotating components are arranged opposite to each other, the rotating component includes a rotating plate, a rotating shaft and a clamping seat, a rotating shaft is installed on the back of the rotating plate, the rotating shaft passes through the clamping seat and the clamping seat rotates in cooperation with the rotating shaft, a motor for driving the rotating shaft to rotate is installed on the rotating shaft, a moving component is installed between the clamping seat and the ground, and the rotating component clamps the two ends of the main limb through the moving component, and a plurality of clamping heads distributed in a circular array are installed on each group of rotating components, each clamping head is divided into four clamping blocks and a clamping plate, the clamping plate slides in cooperation with the rotating component, a spring is arranged between the clamping plate and the rotating component, four slide grooves are opened on the clamping plate, a clamping block is installed in each slide groove, one end of the clamping block is on the rotating plate, an inclined groove inclined outward is opened on the clamping block, a sliding rod is inserted in the inclined groove, and the sliding rod is fixed on the inner wall of the slide groove.

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