Welding machine and welding method thereof

Abstract

The invention discloses a welding machine and a welding method thereof, and relates to the technical field of welding, the welding machine comprises a base, a rack and a bottom plate, the top end of the rack is fixedly connected with a fixing frame, the welding machine further comprises an adjusting mechanism and welding equipment arranged at the end of the adjusting mechanism, and the adjusting mechanism comprises a transverse moving assembly fixedly connected to the upper surface of the fixing frame; the longitudinal moving assembly is fixedly connected to the movable end of the transverse moving assembly, and the vertical moving assembly is fixedly connected to the movable end of the longitudinal moving assembly. By arranging the adjusting mechanism, movement in the three-axis direction can be achieved, the position, making contact with a pipe fitting, of welding equipment can be changed under control, and by arranging the transverse moving assembly, the longitudinal moving assembly and the vertical moving assembly, the effect of movement in the X-axis direction, the Y-axis direction and the Z-axis direction can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a welding machine and a welding method thereof. Background Art

[0002] The welding machine is a key equipment in the field of modern industrial pipe connection, which is highly professional and important. It uses advanced welding technology, such as arc welding, laser welding or resistance welding, and flexibly selects the appropriate process according to different pipe materials, specifications and welding requirements. Its structure is exquisitely designed and equipped with precise pipe clamping and positioning devices, which can firmly stabilize the pipes, ensure the precise alignment of the seams during the welding process, and effectively improve the welding quality and consistency.

[0003] The Chinese patent with application number CN202211175411.5 discloses a multi-station annular pipe circumferential laser welding machine, including a laser welding mechanism and a pipe. A three-base rotating body providing three welding stations is rotatably installed between the two end frames, and a clamping rotating mechanism is fixedly assembled on the three sides of the three-base rotating body. A piece-by-piece cooling structure is fixedly assembled between the two end frames and below the three-base rotating body. A receiving box for collecting finished pipes is movably arranged directly below the piece-by-piece cooling structure, and an air-cooling component for driving the flow of cooling water is arranged on the inner side of one of the end frames. The above invention provides multiple welding stations, and the installation of the next workpiece can be completed during the welding work, thereby improving the efficiency of the welding work. In addition, a clamping disc that can save disassembly time is provided. Finally, the cooling of a single pipe can be realized, solving the problem of multiple pipes coexisting and reducing the cooling effect.

[0004] Although the above invention realizes the rotation effect of the pipe by setting up a three-base rotating body and fixing and assembling a clamping rotating mechanism on the three sides of the three-base rotating body, during the rotation process, the pipe joint cannot be accurately aligned with the welding head of the welding equipment, resulting in difficulty in ensuring the uniformity of the weld, and the weld may be uneven in width and height, which seriously weakens the strength and sealing of the welded joint.

[0005] Therefore, the present invention provides a welding machine and a welding method thereof to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a welding machine and a welding method thereof, which can solve the technical problems raised in the above-mentioned background technology through a limiting component and a guiding component.

[0007] To achieve the above object, the present invention provides the following technical solution: a welding machine, comprising a base, a frame, and a bottom plate, wherein the top of the frame is fixedly connected to a fixing frame, and further comprising: An adjustment mechanism, and a welding device arranged at the end of the adjustment mechanism, wherein the adjustment mechanism comprises a lateral moving assembly fixedly connected to the upper surface of a fixed frame, a longitudinal moving assembly fixedly connected to the movable end of the lateral moving assembly, and a vertical moving assembly fixedly connected to the movable end of the longitudinal moving assembly, and the welding position of the welding device and the pipe fitting is adjusted by moving the lateral moving assembly, the longitudinal moving assembly and the vertical moving assembly; A dust removal mechanism, the dust removal mechanism comprising a connecting pipe penetrating the outer side of the base, the end of the connecting pipe being fixedly connected to a transfer box, the inner wall of the transfer box being fixedly connected to an exhaust fan, and the exhaust fan is used to absorb the fume generated by welding; The positioning mechanism includes a fixed column fixedly connected to the upper surface of the base, a placement component located on the upper surface of the base, and a clamping component arranged directly above the placement component. The top of the fixed column is fixedly connected to a fixed bracket, and the inner wall of the fixed bracket is fixedly connected to a fifth servo motor. The pipe is positioned by adjusting the placement component and the clamping component.

[0008] Preferably, the base plate is fixedly connected to the outer side surface of the base, a servo control cabinet is fixedly connected to the side of the upper surface of the base plate away from the base, a circulating control cooling water tank is fixedly connected to the middle part of the upper surface of the base plate, a plasma welding machine control cabinet is fixedly connected to the side of the upper surface of the base plate close to the base, the outer surface of the frame is fixedly connected to a limit frame, a bending rod is rotatably connected to the inner cavity of the limit frame, and the top of the bending rod is fixedly connected to an operation box, and the lateral movement assembly includes a first support frame and a second support frame, the first support frame is fixedly connected to the side of the upper surface of the fixed frame, the second support frame is fixedly connected to the side of the upper surface of the fixed frame away from the first support frame, the outer side surface of the first support frame is fixedly connected to the first fixed frame, the outer surface of the first fixed frame is fixedly connected to the first servo motor, the output end of the first servo motor is installed with a first reciprocating screw through a coupling, and the end of the first reciprocating screw is rotatably connected to the inner cavity of the second support frame.

[0009] Preferably, a limit rod is fixedly connected between the opposite surfaces of the first support frame and the second support frame, the outer surface of the limit rod is slidably connected with a sliding sleeve, the outer surface of the first reciprocating screw is threadedly connected with the first threaded sleeve, the first threaded sleeve is connected to the sliding sleeve, and the longitudinal movement assembly includes a connecting frame, the connecting frame is fixedly connected to the upper surface of the sliding sleeve, the end of the connecting frame is fixedly connected to the second fixed frame, the upper surface of the second fixed frame is provided with a second servo motor, the output end of the second servo motor is installed with a second reciprocating screw through a coupling, the outer surface of the second reciprocating screw is threadedly connected with the second threaded sleeve, the outer surface of the second threaded sleeve is rotatably connected to the limit frame, the end of the limit frame is fixedly connected with a vertical rod, the outer surface of the vertical rod is fixedly connected with a track bar, the inner cavity of the track bar is slidably connected with a sliding block, and the sliding block is fixedly connected to the outer surface of the second fixed frame.

[0010] Preferably, the bottom end of the vertical rod is fixedly connected to a horizontal frame, the outer surface of the horizontal frame is fixedly connected to a third fixed frame, the inner wall of the third fixed frame is fixedly connected to a third servo motor, the output end of the third servo motor is installed with a third reciprocating screw through a coupling, the outer surface of the third reciprocating screw is slidably connected with a third threaded sleeve, the third threaded sleeve is slidably connected to the inner cavity of the horizontal frame, the vertical moving assembly includes a vertical frame, the vertical frame is fixedly connected to the outer surface of the third threaded sleeve, the upper surface of the vertical frame is fixedly connected with a fourth servo motor, the output end of the fourth servo motor is installed with a fourth reciprocating screw through a coupling, the outer surface of the fourth reciprocating screw is threadedly connected with a fourth threaded sleeve, the outer surface of the fourth threaded sleeve is fixedly connected to a sliding frame, the sliding frame is slidably connected to the outer surface of the vertical frame, and the welding equipment is fixedly connected to the outer surface of the sliding frame.

[0011] Preferably, the placement assembly includes a first position limiting tube, which is located directly above the breathable net, a first sliding plate is slidably connected to the inner cavity of the first position limiting tube, a first spring is fixedly connected to the lower surface of the first sliding plate, a bottom end of the first spring is fixedly connected to the bottom surface of the inner cavity of the first position limiting tube, a moving column is fixedly connected to the upper surface of the first sliding plate, a placement pad is fixedly connected to the top of the moving column, a first support rod is symmetrically fixedly connected to the outer side surface of the first sliding plate, and a tooth plate is fixedly connected to the end of the first support rod.

[0012] Preferably, a rotating rod is installed at the output end of the fifth servo motor through a coupling, and the end of the rotating rod passes through a fixed bracket, and the end of the rotating rod is fixedly connected to a flange shaft, and the clamping assembly includes a rotating disk, and the rotating disk is fixedly connected to the flange shaft, and the lower surface of the rotating disk is fixedly connected to a connecting plate, and the bottom end of the connecting plate is fixedly connected to the outer surface of the first limiting tube, and the outer surface of the rotating disk is fixedly connected to a positioning frame, and the number of the positioning frames is several, and the several positioning frames are evenly distributed, and a fixing ring passes through the outer surface of the rotating disk, and a rolling bearing is rotatably connected to the inner cavity of the fixing ring, and a rotating column is fixedly connected to the inner ring of the rolling bearing, and the end of the rotating column is fixedly connected to a gear, and the gear is meshed with a toothed plate, and the end of the rotating column away from the gear is fixedly connected to the second limiting tube.

[0013] Preferably, a second sliding plate is slidably connected to the inner cavity of the second limiting tube, a second spring is fixedly connected to the upper surface of the second sliding plate, a top end of the second spring is fixedly connected to the inner cavity of the second limiting tube, a second support rod is fixedly connected to the outer surface of the rotating disk, an extrusion block is fixedly connected to the end of the second support rod, the extrusion block is extruded and adapted to the lower surface of the second sliding plate, a cone block is fixedly connected to the upper surface of the second sliding plate, a fixed disk is fixedly connected to the top of the second limiting tube, and two symmetrically arranged first sliding grooves are provided on the upper surface of the fixed disk, a movable part is slidably connected to the interior of each of the first sliding grooves, a first accommodating cavity is provided in the interior of each of the movable parts, and each of the first accommodating cavities The first and second sliding grooves are symmetrically arranged, and the two second sliding grooves correspond to the positions of the two movable parts one by one. The third sliding plate is slidably connected to the interior of each second sliding groove, and the end of each third sliding plate away from the second sliding groove is fixedly connected to a connecting rod, and each connecting rod is fixedly connected to the corresponding movable part.

[0014] Preferably, the outer wall of the second limiting tube is fixedly connected to a fixing rod, a connecting piece is fixedly connected to the fixing rod, a second accommodating chamber is provided inside the connecting piece, a second piston is slidably connected inside the second accommodating chamber, a second sliding column is fixedly connected to one side of the second piston, an end of the second sliding column away from the second piston passes through the connecting piece and is fixedly connected to an anti-slip piece, a fourth spring is connected between the anti-slip piece and the connecting piece, a guide groove is provided inside the fixing rod, the guide groove is connected to the second accommodating chamber, a guide pipe is fixedly connected to the bottom of one of the movable parts, and the guide pipe is connected to the guide groove.

[0015] Preferably, an air intake pipe penetrates the upper surface of the transfer box, a collection frame is slidably connected to the inner cavity of the base, an air-permeable plate penetrates the side of the collection frame close to the connecting pipe, and an air-permeable net is fixedly connected to the axis of the upper surface of the base.

[0016] The present invention also provides a welding method, comprising the following steps: Step 1: Place the pipe to be welded on the upper surface of the placement pad, and align the outer surface of the pipe with the multiple positioning frames. Under the action of the gravity of the pipe, the clamping assembly will be inserted into the pipe to complete the positioning of the pipe. Step 2: Control the servo control cabinet and adjust the welding equipment until the welding equipment is located at the position where the pipe fitting needs to be welded, and then control the plasma welding machine control cabinet to make the welding equipment weld the pipe fitting interface position; Step 3: Control the fifth servo motor to make the rotating rod drive the flange shaft and the rotating disk to rotate. When the rotating disk rotates, the joint of the pipe fitting will be fully in contact with the welding equipment.

[0017] The beneficial effects of the present invention are: 1. The present invention can realize movement in three axes by setting an adjustment mechanism, and can change the contact position between the welding equipment and the pipe fitting. By setting a lateral movement component, a longitudinal movement component and a vertical movement component, the effect of movement in the three axes of XYZ can be achieved respectively.

[0018] 2. The present invention provides a dust removal mechanism, which can absorb the fume and welding slag generated by pipe welding when starting work, thereby preventing the waste gas and slag generated by welding from splashing and causing harm to operators. By providing an exhaust fan, airflow can be generated after the power is connected and the switch is turned on, and the air around the pipe can be absorbed.

[0019] 3. The present invention can position the pipes to be welded by setting a positioning mechanism, and automatically squeeze the two ends of the pipes after the pipes are placed, so that the pipes are tightly positioned, and can drive the clamped pipes to rotate, so as to achieve the effect of making the pipe joints fully contact with the welding equipment. By setting a fixed column and a fixed bracket, the fifth servo motor can be fixed. By setting the fifth servo motor, the output end can be rotated after the power is connected and the switch is turned on.

[0020] 4. The present invention sets an anti-slip part. When placing the welding pipe fitting, the two ends of the pipe fitting need to be placed between the soft pad and the anti-slip part. The third sliding plates on both sides slide in the second sliding groove, which can make the two movable parts move in the corresponding first sliding groove in the direction away from each other. In this process, the two soft pads will preferentially contact and squeeze the inner wall of the pipe fitting, so that the soft pad can push the connecting rod to move in the direction close to the cone block, and can squeeze the hydraulic oil inside the first accommodating chamber, so that the hydraulic oil passes through the guide pipe and the guide groove and enters the interior of the second accommodating chamber. The hydraulic oil can push the second piston to move in the direction of the fixed disk, and the anti-slip part can limit and clamp the outer wall of the pipe fitting to avoid excessive squeezing of the pipe fitting by the soft pad, prevent the gap at the welding point of the pipe fitting from becoming larger, and improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a rear view of the welding machine structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the local structure of the welding machine of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the lateral moving component of the present invention.

[0025] Figure 5 It is a schematic diagram of the local structure of the lateral movement component of the present invention.

[0026] Figure 6 It is a schematic diagram of the structure of the longitudinal moving component of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the vertical moving component of the present invention.

[0028] Figure 8 It is a schematic diagram of the dust removal mechanism structure of the present invention.

[0029] Fig. 9 It is a schematic diagram of the positioning mechanism structure of the present invention.

[0030] Fig.10 It is a schematic diagram of the local structure of the positioning mechanism of the present invention.

[0031] Fig.11 This is a schematic diagram of the cross-sectional structure of the components placed in the present invention.

[0032] Fig.12 It is a schematic diagram of the structure of the clamping assembly of the present invention.

[0033] Fig.13 It is a schematic diagram of the local structure of the clamping assembly of the present invention.

[0034] Fig.14 It is a schematic diagram of the partial cross-sectional structure of the clamping assembly of the present invention.

[0035] Fig.15 For the present invention Fig.14 Enlarged view of the structure of part A in the middle.

[0036] The accompanying drawings are marked as follows: 1. Base; 2. Frame; 3. Fixed frame; 4. Adjustment mechanism; 5. Welding equipment; 6. Dust removal mechanism; 7. Positioning mechanism; 8. Bottom plate; 9. Servo control cabinet; 10. Circulation control cooling water tank; 11. Plasma welding machine control cabinet; 12. Limit frame; 13. Bending rod; 14. Operation box; 41. Horizontal moving assembly; 42. Longitudinal moving assembly; 43. Vertical moving assembly; 411. First support frame; 412. Second support frame; 413. First fixed frame; 414. First servo motor; 415. First reciprocating screw rod; 416. Limit rod; 417. First threaded sleeve; 418. Sliding sleeve; 421. Connection Frame; 422, second fixed frame; 423, second servo motor; 424, second reciprocating screw rod; 425, second threaded sleeve; 426, limit frame; 427, vertical rod; 428, sliding block; 429, track bar; 4210, horizontal frame; 4211, third fixed frame; 4212, third servo motor; 4213, third reciprocating screw rod; 4214, third threaded sleeve; 431, vertical frame; 432, fourth servo motor; 433, fourth reciprocating screw rod; 434, fourth threaded sleeve; 435, sliding frame; 61, connecting pipe; 62, transfer box; 63, exhaust fan; 64, suction pipe; 65, collection frame; 66, breathable plate ; 67, breathable net; 71, fixed column; 72, fixed bracket; 73, fifth servo motor; 74, rotating rod; 75, flange shaft; 76, placement component; 77, clamping component; 78, connecting plate; 761, first limit tube; 762, first sliding plate; 763, first spring; 764, moving column; 765, placement pad; 766, first support rod; 767, tooth plate; 771, rotating disk; 772, positioning frame; 773, fixed ring; 774, second support rod; 775, extrusion block; 776, rolling bearing; 777, rotating column; 778, gear; 779, second limit tube; 7710, second sliding plate; 7711, second spring; 7712, cone block; 7713, fixed plate; 7714, movable part; 7715, first sliding column; 7716, guide tube; 7717, cushion; 7718, third spring; 7719, fixed rod; 7720, first sliding groove; 7721, first accommodating chamber; 7722, first piston; 7723, second sliding groove; 7724, third sliding plate; 7725, connecting rod; 7726, connecting part; 7727, second accommodating chamber; 7728, second piston; 7729, second sliding column; 7730, anti-slip part; 7731, fourth spring; 7732, guide groove. DETAILED DESCRIPTION

[0037] 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1 In the actual production process, since the welding equipment cannot stably change the position of the XYZ three-axis direction, during the welding process, the uniformity of the weld is first difficult to ensure, and the weld may be uneven in width and height, which seriously weakens the strength and sealing of the welded joint. For pipes that are subjected to high pressure, high temperature or transport dangerous media, this undoubtedly greatly increases the risk of leakage. From the perspective of construction efficiency, frequent adjustment of welding parameters or rework due to unstable joint position will cause frequent interruptions of welding operations, reduce the overall construction speed, extend the construction period, and increase manpower, material and time costs. Moreover, the unstable joint position may also cause uneven distribution of the welding heat-affected zone, resulting in changes in the local material properties of the pipe, such as hardening, embrittlement, etc., further reducing the durability and reliability of the pipe, affecting its long-term stable operation under predetermined working conditions. This embodiment is specially invented to solve the above problems.

[0039] See also Figures 1 to 7 A welding machine according to an embodiment of the present invention comprises a base 1, a frame 2, and a bottom plate 8. A fixed frame 3 is fixedly connected to the top of the frame 2. The machine also comprises: an adjusting mechanism 4, and a welding device 5 arranged at the end of the adjusting mechanism 4. The adjusting mechanism 4 comprises a lateral moving component 41 fixedly connected to the upper surface of the fixed frame 3, a longitudinal moving component 42 fixedly connected to the movable end of the lateral moving component 41, and a vertical moving component 43 fixedly connected to the movable end of the longitudinal moving component 42. The welding position of the welding device 5 and the pipe fitting is adjusted by moving the lateral moving component 41, the longitudinal moving component 42 and the vertical moving component 43. By setting the adjusting mechanism 4, the movement in three axes can be realized, and the contact position between the welding device 5 and the pipe fitting can be changed under control. By setting the lateral moving component 41, the longitudinal moving component 42 and the vertical moving component 43, the effects of movement in the three axes of XYZ can be realized respectively.

[0040] Among them, the dust removal mechanism 6 includes a connecting pipe 61 that passes through the outer side of the base 1, and the end of the connecting pipe 61 is fixedly connected to a transfer box 62, and the inner wall of the transfer box 62 is fixedly connected to an exhaust fan 63. The exhaust fan 63 absorbs the smoke generated by welding. By setting up the dust removal mechanism 6, the smoke and welding slag generated by the pipe welding can be absorbed when the work starts, thereby preventing the waste gas and slag generated by the welding from splashing and causing harm to the operator. By setting up the exhaust fan 63, after the power is connected and the switch is turned on, airflow can be generated to absorb the air around the pipe.

[0041] Among them, the positioning mechanism 7 includes a fixed column 71 fixedly connected to the upper surface of the base 1, a placement component 76 located on the upper surface of the base 1, and a clamping component 77 arranged directly above the placement component 76. The top of the fixed column 71 is fixedly connected to a fixed bracket 72, and the inner wall of the fixed bracket 72 is fixedly connected to a fifth servo motor 73. The pipe fitting is positioned by adjusting the placement component 76 and the clamping component 77. By setting the positioning mechanism 7, the pipe fitting to be welded can be positioned, and after the pipe fitting is placed, the two ends of the pipe fitting are automatically squeezed, so that the pipe fitting is tightly positioned, and can drive the clamped pipe fitting to rotate, so as to achieve the effect of making the pipe joint fully contact with the welding equipment 5. By setting the fixed column 71 and the fixed bracket 72, the fifth servo motor 73 can be fixed. By setting the fifth servo motor 73, the output end can be rotated after the power is connected and the switch is turned on.

[0042] like Figures 1 to 3As shown, the bottom plate 8 of this embodiment is fixedly connected to the outer side of the base 1, the side of the upper surface of the bottom plate 8 away from the base 1 is fixedly connected to a servo control cabinet 9, the middle part of the upper surface of the bottom plate 8 is fixedly connected to a circulating control cooling water tank 10, the side of the upper surface of the bottom plate 8 close to the base 1 is fixedly connected to a plasma welding machine control cabinet 11, the outer surface of the frame 2 is fixedly connected to a limit frame 12, the inner cavity of the limit frame 12 is rotatably connected to a bending rod 13, and the top of the bending rod 13 is fixedly connected to an operation box 14. By setting the servo control cabinet 9, the servo motor in the device can be controlled, and the regulating mechanism 4 can be controlled to start working, so that the regulating mechanism 4 can accurately drive the welding equipment 5 to work, and the circulating control cooling water tank 10 can be fixedly connected to the middle part of the upper surface of the bottom plate 8. The box 10 can cool the heat generated when the device is working, so as to keep the welding equipment 5 from being damaged due to high temperature during welding. By setting the plasma welding machine control cabinet 11, the control state of the welding equipment 5 can be adjusted. By setting the limit frame 12, the bending rod 13 can be limited so that the bending rod 13 can rotate in the inner cavity of the limit frame 12, thereby adjusting the position of the operation box 14. By setting the operation box 14, the servo control cabinet 9, the circulation control cooling water tank 10 and the plasma welding machine control cabinet 11 can be controlled, and the operation box 14 is connected to the servo control cabinet 9, the circulation control cooling water tank 10 and the plasma welding machine control cabinet 11 through electrical signals.

[0043] like Figures 4 to 7 As shown, the lateral movement assembly 41 of this embodiment includes a first support frame 411 and a second support frame 412. The first support frame 411 is fixedly connected to the side of the upper surface of the fixed frame 3, and the second support frame 412 is fixedly connected to the side of the upper surface of the fixed frame 3 away from the first support frame 411. The outer side surface of the first support frame 411 is fixedly connected to a first fixed frame 413, and the outer surface of the first fixed frame 413 is fixedly connected to a first servo motor 414. The output end of the first servo motor 414 is installed with a first reciprocating screw rod 415 through a coupling. The first reciprocating screw rod 415 is fixedly connected to the outer surface of the first servo motor 414. The end of the screw rod 415 is rotatably connected to the inner cavity of the second support frame 412. By setting the first fixed frame 413, the first servo motor 414 can be fixed on the upper surface of the fixed frame 3. By setting the first servo motor 414, the first reciprocating screw rod 415 can be rotated after the power is connected and the switch is turned on. Bearings are provided in the inner cavities of the first support frame 411 and the second support frame 412. Therefore, when the first reciprocating screw rod 415 rotates, it can generate stable rotation in the inner cavities of the first support frame 411 and the second support frame 412.

[0044] In this embodiment, a limiting rod 416 is fixedly connected between the opposite surfaces of the first support frame 411 and the second support frame 412. The outer surface of the limiting rod 416 is slidably connected with a sliding sleeve 418. The outer surface of the first reciprocating screw rod 415 is threadedly connected with a first threaded sleeve 417. The first threaded sleeve 417 is connected to the sliding sleeve 418. By setting the first threaded sleeve 417, when the first reciprocating screw rod 415 rotates, stable lateral movement can be generated on the outer surface of the first reciprocating screw rod 415. The first threaded sleeve 417 is composed of an internal threaded ring and an external bearing. When a reciprocating screw rod 415 rotates, the first threaded sleeve 417 can move on the outer surface of the first reciprocating screw rod 415 while the sliding sleeve 418 does not rotate. By setting a limit rod 416, the sliding sleeve 418 can be limited so that the sliding sleeve 418 can slide stably on the outer surface of the limit rod 416. The longitudinal moving component 42 includes a connecting frame 421, which is fixedly connected to the upper surface of the sliding sleeve 418. The end of the connecting frame 421 is fixedly connected to a second fixed frame 422. The upper surface of the second fixed frame 422 is provided with a second servo motor 423. The output end of the second servo motor 423 is installed with a second reciprocating screw 424 through a coupling, the outer surface of the second reciprocating screw 424 is threadedly connected with a second threaded sleeve 425, the outer surface of the second threaded sleeve 425 is rotatably connected to a limit frame 426, the end of the limit frame 426 is fixedly connected with a vertical rod 427, the outer surface of the vertical rod 427 is fixedly connected with a track bar 429, the inner cavity of the track bar 429 is slidably connected with a sliding block 428, and the sliding block 428 is fixedly connected to the outer surface of the second fixed frame 422. By setting the connecting frame 421, the second fixed frame 42 2 is connected with the sliding sleeve 418, and by providing a second servo motor 423, the second reciprocating screw rod 424 can be rotated under control, and by providing a second threaded sleeve 425, when the second reciprocating screw rod 424 rotates, the second threaded sleeve 425 can be vertically moved up and down on the outer surface of the second reciprocating screw rod 424, and by providing a limit frame 426, when the second threaded sleeve 425 moves up and down, the limit frame 426 can drive the vertical rod 427 to move, and by providing a track bar 429 and a sliding block 428, the vertical movement of the vertical rod 427 can be more stable.

[0045] Among them, the bottom end of the vertical rod 427 is fixedly connected to the horizontal frame 4210, the outer surface of the horizontal frame 4210 is fixedly connected to the third fixed frame 4211, the inner wall of the third fixed frame 4211 is fixedly connected to the third servo motor 4212, the output end of the third servo motor 4212 is installed with a third reciprocating screw rod 4213 through a coupling, the outer surface of the third reciprocating screw rod 4213 is slidably connected to the third threaded sleeve 4214, the third threaded sleeve 4214 is slidably connected to the inner cavity of the horizontal frame 4210, and the third servo motor 4212 is arranged to make the third reciprocating screw rod 4213 rotate, thereby driving the third threaded sleeve 4214 to move, and generating lateral movement with the horizontal frame 4210 as the axis, and the vertical moving component 43 includes a vertical frame 431, the vertical frame 431 is fixedly connected to the outer surface of the third threaded sleeve 4214, the upper surface of the vertical frame 431 is fixedly connected to the fourth servo motor 432, and the fourth servo motor 432 The output end of the fourth reciprocating screw rod 433 is installed with a fourth reciprocating screw rod 433 through a coupling, and the outer surface of the fourth reciprocating screw rod 433 is threadedly connected with a fourth threaded sleeve 434, and the outer surface of the fourth threaded sleeve 434 is fixedly connected with a sliding frame 435, and the sliding frame 435 is slidably connected to the outer surface of the vertical frame 431, and the welding equipment 5 is fixedly connected to the outer surface of the sliding frame 435. By setting the fourth servo motor 432, the fourth reciprocating screw rod 433 can be rotated under power supply and control, and then the fourth threaded sleeve 434 can be moved up and down on the outer surface of the fourth reciprocating screw rod 433. The fourth threaded sleeve 434 is composed of an internal threaded ring and an external bearing. Therefore, when the fourth reciprocating screw rod 433 rotates, the fourth threaded sleeve 434 can move on the outer surface of the fourth reciprocating screw rod 433 without the outer ring rotating. By setting the sliding frame 435, when the fourth threaded sleeve 434 moves up and down, the welding equipment 5 can be driven to move up and down.

[0046] During use, when it is necessary to change the position of the welding equipment 5 and the pipe fitting, the operator controls the servo control cabinet 9, and when the lateral position needs to be changed, the first servo motor 414 starts working, so that its output end drives the first reciprocating screw rod 415 to rotate. When the first reciprocating screw rod 415 rotates, the first threaded sleeve 417 rotates and moves on the outer surface of the first reciprocating screw rod 415, thereby achieving the effect of adjusting the lateral position. When it is necessary to adjust the longitudinal or vertical position, it is only necessary to control the second servo motor 423, the third servo motor 4212 and the fourth servo motor 432 respectively, and finally the position of the welding equipment 5 is changed.

[0047] In summary, by setting the first servo motor 414, the first reciprocating screw rod 415 can be rotated after the power is connected and the switch is turned on. Bearings are provided at the inner cavities of the first support frame 411 and the second support frame 412. Therefore, when the first reciprocating screw rod 415 rotates, it can generate stable rotation in the inner cavities of the first support frame 411 and the second support frame 412. By setting the first threaded sleeve 417, when the first reciprocating screw rod 415 rotates, it can generate stable lateral movement on the outer surface of the first reciprocating screw rod 415. The first threaded sleeve 417 is composed of an internal threaded ring and an external bearing. Therefore, when the first reciprocating screw rod 415 rotates, the first threaded sleeve 417 can move on the outer surface of the first reciprocating screw rod 415 while the sliding sleeve 418 does not rotate. By setting the limit rod 416, the sliding sleeve 418 can be limited so that The sliding sleeve 418 can produce stable sliding on the outer surface of the limiting rod 416. By setting the third servo motor 4212, the third reciprocating screw rod 4213 can be rotated, thereby driving the third threaded sleeve 4214 to move, and generate lateral movement with the horizontal frame 4210 as the axis. By setting the fourth servo motor 432, the fourth reciprocating screw rod 433 can be rotated under power supply and control, thereby enabling the fourth threaded sleeve 434 to move up and down on the outer surface of the fourth reciprocating screw rod 433. The fourth threaded sleeve 434 is composed of an internal threaded ring and an external bearing. Therefore, when the fourth reciprocating screw rod 433 rotates, the fourth threaded sleeve 434 can move on the outer surface of the fourth reciprocating screw rod 433 without the outer ring rotating. By setting the sliding frame 435, when the fourth threaded sleeve 434 moves up and down, the welding equipment 5 can be driven to move up and down.

[0048] Embodiment 2 It is found that when using the above-mentioned embodiment, if the pipe fittings are not stably positioned during the welding process, the welding position will easily shift, resulting in irregular welds, uneven width, and high and low fluctuations, which greatly reduces the strength and sealing of the welds. For pipe fittings that transport high-pressure fluids or hazardous chemicals, the risk of leakage is greatly increased, which may cause catastrophic accidents such as explosions and poisoning, endangering the safety of life and property and the ecological environment. This embodiment is specially invented to solve the above-mentioned problems.

[0049] See also Figures 8 to 15An air suction pipe 64 runs through the upper surface of the transfer box 62, a collecting frame 65 is slidably connected to the inner cavity of the base 1, a breathable plate 66 runs through the side of the collecting frame 65 close to the connecting pipe 61, and a breathable net 67 is fixedly connected to the axis of the upper surface of the base 1. By setting the air suction pipe 64, when the transfer box 62 generates suction, the air suction pipe 64 can generate suction, thereby absorbing dust and smoke on the outer surface of the pipe. By setting the collecting frame 65 and the breathable net 67, the slag generated by welding can enter the inner cavity of the base 1 through the breathable plate 66 and be finally blocked by the breathable net 67.

[0050] like Figure 11 to Figure 12 As shown, the placement component 76 includes a first limiting tube 761, which is located just above the breathable net 67, and there is a certain distance between the first limiting tube 761 and the breathable net 67. When the clamping component 77 rotates, the placement component 76 will rotate along with the clamping component 77. A first sliding plate 762 is slidably connected to the inner cavity of the first limiting tube 761, and a first spring 763 is fixedly connected to the lower surface of the first sliding plate 762. The bottom end of the first spring 763 is fixedly connected to the bottom surface of the inner cavity of the first limiting tube 761. A moving column 764 is fixedly connected to the upper surface of the first sliding plate 762, and a placement pad 765 is fixedly connected to the top of the moving column 764. The outer side surface of the first sliding plate 762 is symmetrical A first support rod 766 is fixedly connected, and a tooth plate 767 is fixedly connected to the end of the first support rod 766. By setting the first limiting tube 761, the first sliding plate 762 can be limited, so that the first sliding plate 762 can produce an effect of vertical up and down movement in the inner cavity of the first limiting tube 761. By setting the first spring 763, the bottom of the first sliding plate 762 can be supported, so that after the first sliding plate 762 moves downward, it can return to its original position upward. By setting the placement pad 765, the bottom of the pipe fitting can be supported when the pipe fitting is placed. By setting the tooth plate 767, the first sliding plate 762 can drive the first support rod 766 and the tooth plate 767 to move downward when the pipe fitting is placed.

[0051] Among them, the output end of the fifth servo motor 73 is installed with a rotating rod 74 through a coupling, the end of the rotating rod 74 passes through the fixed bracket 72, and the end of the rotating rod 74 is fixedly connected to the flange shaft 75. By setting the fifth servo motor 73, after the power is connected and the switch is turned on, the rotating rod 74 can drive the flange shaft 75 to rotate, thereby driving the pipe fitting clamped by the clamping assembly 77 to rotate. The clamping assembly 77 includes a rotating disk 771, which is fixedly connected to the flange shaft 75. The lower surface of 771 is fixedly connected with a connecting plate 78, the bottom end of which is fixedly connected to the outer surface of the first limiting tube 761, and the outer surface of the rotating disk 771 is fixedly connected with a positioning frame 772, the number of which is several, and the positioning frames 772 are evenly distributed, and the positioning frames 772 play the role of limiting the two semicircular right-angle pipe fittings, and can support the outer surface of the semicircular right-angle pipe after the two semicircular right-angle pipe fittings are clamped. A fixing ring 773 is passed through, and a rolling bearing 776 is rotatably connected to the inner cavity of the fixing ring 773. A rotating column 777 is fixedly connected to the inner ring of the rolling bearing 776. A gear 778 is fixedly connected to the end of the rotating column 777. The gear 778 is meshed with the tooth plate 767. The end of the rotating column 777 away from the gear 778 is fixedly connected to a second limiting tube 779. By setting the clamping assembly 77, the pipe fittings that need to be positioned can be clamped, and the two ends of the pipe fittings can be automatically squeezed and clamped when the pipe fittings are placed. , to achieve the effect of automatically clamping and positioning the pipe fittings. By setting the connecting plate 78, the rotating disk 771 can be connected to the first limiting tube 761. By setting the positioning frame 772, the pipe fitting can be positioned so that the pipe fitting can be positioned by a plurality of positioning frames 772. By setting the rolling bearing 776, the rotating column 777 can generate stable rotation. By setting the gear 778, when the tooth plate 767 moves downward, the gear 778 can be driven to rotate, thereby causing the second limiting tube 779 to rotate.

[0052] like Figures 13 to 15As shown, a second sliding plate 7710 is slidably connected to the inner cavity of the second limiting tube 779, a second spring 7711 is fixedly connected to the upper surface of the second sliding plate 7710, and the top of the second spring 7711 is fixedly connected to the inner cavity of the second limiting tube 779. A second support rod 774 is fixedly connected to the outer surface of the rotating disk 771, and an extrusion block 775 is fixedly connected to the end of the second support rod 774. The extrusion block 775 is extruded and adapted to the lower surface of the second sliding plate 7710. By setting the second limiting tube 779, the second sliding plate 7710 can be limited so that the second sliding plate 7710 can produce an effect of vertical up and down movement. By setting the extrusion block 775, when the gear 778 drives the rotating column 777 and the second limiting tube 779 to rotate, the extrusion block 775 can squeeze the lower surface of the second sliding plate 7710, so that the second sliding plate 7710 moves upward, and the upper surface of the second sliding plate 7710 is fixedly connected with a cone block 7712, and the top of the second limiting tube 779 is fixedly connected with a fixed disk 7713, and the upper surface of the fixed disk 7713 is provided with two symmetrically arranged first sliding grooves 7720, and each first sliding groove 7720 is slidably connected with a movable part 7714, and each movable part 7714 has a first accommodating cavity 77 721, each first accommodating chamber 7721 is slidably connected to a first piston 7722, and the opposite sides of the two first pistons 7722 are fixedly connected to a first sliding column 7715, and the other end of each first sliding column 7715 penetrates the corresponding movable part 7714 and is fixedly connected to a soft cushion 7717, and a third spring 7718 is connected between each soft cushion 7717 and the corresponding movable part 7714, and each third spring 7718 is sleeved on the outer side of the corresponding first sliding column 7715, and the outer wall of the cone block 7712 is provided with two symmetrically arranged second sliding grooves 7723, and the two second sliding grooves 7723 are connected to the two movable parts 7714. The positions of 714 correspond one to one, and the interior of each second sliding groove 7723 is slidably connected to a third sliding plate 7724, and the end of each third sliding plate 7724 away from the second sliding groove 7723 is fixedly connected to a connecting rod 7725, and each connecting rod 7725 is fixedly connected to the corresponding movable part 7714. By setting the cone block 7712, when the second sliding plate 7710 moves upward, the cone block 7712 can squeeze the third sliding plate 7724, and then the two movable parts 7714 can move in the direction away from each other in the corresponding first sliding groove 7720, so that the two soft pads 7717 can contact and squeeze the inner wall of the pipe.

[0053] like Figure 1As shown, when placing the welding pipe fittings, the two ends of the pipe fittings need to be placed between the soft pad 7717 and the anti-slip part 7730. When the gear 778 drives the rotating column 777 and the second limiting tube 779 to rotate, the fixed extrusion block 775 will squeeze the lower surface of the second sliding plate 7710, so that the second sliding plate 7710 drives the cone block 7712 to move upward synchronously. While squeezing the second spring 7711, the third sliding plates 7724 on both sides can slide in the second sliding groove 7723, and the two movable parts 7714 can move in the corresponding first sliding groove 7720 in the direction away from each other, so that the two soft pads 7717 can contact and squeeze the inner wall of the pipe fitting for limiting and fixing, and can squeeze the third spring 7718.

[0054] Embodiment 3 Based on the above embodiment, since the two cushions 7717 squeeze the inner wall of the pipe, the pipe will be subjected to an outward force, and excessive squeezing will enlarge the gap at the welding point of the pipe, which will affect the subsequent welding quality of the pipe.

[0055] See also Figures 12 to 15 The outer wall of the second limiting tube 779 is fixedly connected to a fixing rod 7719, to which a connecting piece 7726 is fixedly connected, a second accommodating chamber 7727 is provided inside the connecting piece 7726, a second piston 7728 is slidably connected inside the second accommodating chamber 7727, a second sliding column 7729 is fixedly connected to one side of the second piston 7728, an end of the second sliding column 7729 away from the second piston 7728 passes through the connecting piece 7726 and is fixedly connected to an anti-slip piece 7730, a fourth spring 7731 is connected between the anti-slip piece 7730 and the connecting piece 7726, a guide groove 7732 is provided inside the fixing rod 7719, the guide groove 7732 is communicated with the second accommodating chamber 7727, a guide pipe 7716 is fixedly connected to the bottom of one of the movable parts 7714, and the guide pipe 7716 is communicated with the guide groove 7732.

[0056] The interior of the first accommodating chamber 7721 is filled with hydraulic oil, and an avoidance groove for the movement of the guide tube 7716 is opened at the bottom of the fixed plate 7713. The guide tube 7716 is a hose for easy movement.

[0057] like Fig.14 As shown, in a normal state, that is, when no pipe fittings are installed, the first piston 7722 is located inside the first accommodating chamber 7721 on a side away from the connecting rod 7725, and the second piston 7728 is located inside the second accommodating chamber 7727 on a side close to the fixing rod 7719.

[0058] When placing the welded pipe fittings in actual use, the two ends of the pipe fittings need to be placed between the soft pads 7717 and the anti-slip parts 7730, and the third sliding plates 7724 on both sides slide in the second sliding grooves 7723, so that the two movable parts 7714 can move in the corresponding first sliding grooves 7720 in the direction away from each other. During this process, the two soft pads 7717 will preferentially contact and squeeze the inner wall of the pipe fittings, so that the soft pads 7717 can push the connecting rod 7725 to move in the direction close to the cone block 7712, and can squeeze the hydraulic oil inside the first accommodating chamber 7721, so that the hydraulic oil passes through the guide pipe 7716 and the guide groove 7732 and enters the second accommodating chamber 7727. The hydraulic oil can push the second piston 7728 to move in the direction of the fixed plate 7713, and can enable the anti-slip parts 7730 to limit and clamp the outer wall of the pipe fitting, so as to avoid the soft pads 7717 from excessively squeezing the pipe fittings, prevent the gap at the welding point of the pipe fittings from becoming larger, and improve the welding quality.

[0059] Embodiment 4 The present invention also provides a welding method, comprising the following steps: Step 1: Place two semicircular right-angle pipes to be welded on the upper surface of the placement pad 765, and align the outer surface of the pipe with the plurality of positioning frames 772. Under the action of the gravity of the pipe, the clamping assembly 77 penetrates into the interior of the pipe, and the positioning of the pipe is completed; Step 2: Control the servo control cabinet 9 and adjust the welding device 5 until the welding device 5 is located at the position where the pipe needs to be welded, and then control the plasma welding machine control cabinet 11 to make the welding device 5 weld the pipe interface position; Step 3: Control the fifth servo motor 73 to make the rotating rod 74 drive the flange shaft 75 and the rotating disk 771 to rotate. When the rotating disk 771 rotates, the joint of the pipe will fully contact with the welding device 5.

[0060] Working principle: When in use, the operator places the pipe fitting to be welded on the upper surface of the placement pad 765. Under the action of gravity, the pipe fitting squeezes the placement pad 765, thereby causing the first sliding plate 762 to move downward, and drives the first support rod 766 and the tooth plate 767 to move downward. At the same time, the gear 778 rotates, thereby causing the rotating column 777 to rotate at the rolling bearing 776, and finally causing the second limiting tube 779 to rotate and move toward the inner wall of the pipe fitting. Then the squeezing block 775 squeezes the second sliding plate 7710, so that the second sliding plate 7710 drives the cone block 7712 to move upward synchronously, and squeezes the second spring 7711 while allowing the third sliding plates 7724 on both sides to slide in the second sliding groove 7723, so that the two movable parts 7714 can move in the corresponding first sliding groove 7720 in the direction away from each other, and the two soft pads 7717 can contact and squeeze the inner wall of the pipe fitting. The limit fixation is used to achieve the positioning of the pipe fitting. When the position of the pipe fitting needs to be adjusted, the operator controls the fifth servo motor 73, so that the rotating rod 74 drives the rotating disk 771 to rotate slowly, so as to achieve the effect of adjusting the direction of the pipe fitting; when the position of the welding equipment 5 and the pipe fitting needs to be changed, the operator controls the servo control cabinet 9, and when the lateral position needs to be changed, the first servo motor 414 starts to work, so that its output end drives the first reciprocating screw rod 415 to rotate. When the first reciprocating screw rod 415 rotates, the first threaded sleeve 417 rotates and moves on the outer surface of the first reciprocating screw rod 415, so as to achieve the effect of adjusting the lateral position. When the longitudinal or vertical position needs to be adjusted, it is only necessary to control the second servo motor 423, the third servo motor 4212 and the fourth servo motor 432 respectively, and finally the position of the welding equipment 5 is changed, so as to facilitate the rapid and stable welding of the pipe fitting.

[0061] The above are only preferred specific implementation modes 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 solutions and inventive concepts 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. A welding machine, comprising a base, a frame, and a bottom plate, wherein the top of the frame is fixedly connected to a fixing frame, characterized in that: Also includes: An adjustment mechanism, and a welding device arranged at the end of the adjustment mechanism, wherein the adjustment mechanism comprises a lateral moving assembly fixedly connected to the upper surface of a fixed frame, a longitudinal moving assembly fixedly connected to the movable end of the lateral moving assembly, and a vertical moving assembly fixedly connected to the movable end of the longitudinal moving assembly, and the welding position of the welding device and the pipe fitting is adjusted by moving the lateral moving assembly, the longitudinal moving assembly and the vertical moving assembly; A dust removal mechanism, the dust removal mechanism comprising a connecting pipe penetrating the outer side of the base, the end of the connecting pipe being fixedly connected to a transfer box, the inner wall of the transfer box being fixedly connected to an exhaust fan, and the exhaust fan is used to absorb the fume generated by welding; The positioning mechanism includes a fixed column fixedly connected to the upper surface of the base, a placement component located on the upper surface of the base, and a clamping component arranged directly above the placement component. The top of the fixed column is fixedly connected to a fixed bracket, and the inner wall of the fixed bracket is fixedly connected to a fifth servo motor. The pipe is positioned by adjusting the placement component and the clamping component.

2. The welding machine according to claim 1, characterized in that: The bottom plate is fixedly connected to the outer side surface of the base, the side of the upper surface of the bottom plate away from the base is fixedly connected to a servo control cabinet, the middle part of the upper surface of the bottom plate is fixedly connected to a circulating control cooling water tank, the side of the upper surface of the bottom plate close to the base is fixedly connected to a plasma welding machine control cabinet, the outer surface of the frame is fixedly connected to a limit frame, the inner cavity of the limit frame is rotatably connected to a bending rod, and the top of the bending rod is fixedly connected to an operation box, and the lateral movement assembly includes a first support frame and a second support frame, the first support frame is fixedly connected to the side of the upper surface of the fixed frame, the second support frame is fixedly connected to the side of the upper surface of the fixed frame away from the first support frame, the outer side surface of the first support frame is fixedly connected to the first fixed frame, the outer surface of the first fixed frame is fixedly connected to the first servo motor, the output end of the first servo motor is installed with a first reciprocating screw through a coupling, and the end of the first reciprocating screw is rotatably connected to the inner cavity of the second support frame.

3. The welding machine according to claim 2, characterized in that: A limiting rod is fixedly connected between opposite surfaces of the first supporting frame and the second supporting frame, and a sliding sleeve is slidably connected to an outer surface of the limiting rod, and the outer surface of the first reciprocating screw is threadedly connected to the first threaded sleeve, and the first threaded sleeve is connected to the sliding sleeve. The longitudinal moving assembly includes a connecting frame, the connecting frame is fixedly connected to the upper surface of the sliding sleeve, the end of the connecting frame is fixedly connected to the second fixed frame, the upper surface of the second fixed frame is provided with a second servo motor, the output end of the second servo motor is installed with a second reciprocating screw through a coupling, the outer surface of the second reciprocating screw is threadedly connected to the second threaded sleeve, the outer surface of the second threaded sleeve is rotatably connected to the limiting frame, the end of the limiting frame is fixedly connected to a vertical rod, the outer surface of the vertical rod is fixedly connected to a track bar, the inner cavity of the track bar is slidably connected to a sliding block, and the sliding block is fixedly connected to the outer surface of the second fixed frame.

4. The welding machine according to claim 3, characterized in that: The bottom end of the vertical rod is fixedly connected to a horizontal frame, the outer surface of the horizontal frame is fixedly connected to a third fixed frame, the inner wall of the third fixed frame is fixedly connected to a third servo motor, the output end of the third servo motor is installed with a third reciprocating screw through a coupling, the outer surface of the third reciprocating screw is slidably connected with a third threaded sleeve, and the third threaded sleeve is slidably connected to the inner cavity of the horizontal frame, the vertical moving assembly includes a vertical frame, the vertical frame is fixedly connected to the outer surface of the third threaded sleeve, the upper surface of the vertical frame is fixedly connected with a fourth servo motor, the output end of the fourth servo motor is installed with a fourth reciprocating screw through a coupling, the outer surface of the fourth reciprocating screw is threadedly connected with a fourth threaded sleeve, the outer surface of the fourth threaded sleeve is fixedly connected to a sliding frame, the sliding frame is slidably connected to the outer surface of the vertical frame, and the welding equipment is fixedly connected to the outer surface of the sliding frame.

5. The welding machine according to claim 4, characterized in that: The placement assembly includes a first position limiting tube, which is located directly above the breathable net. A first sliding plate is slidably connected to the inner cavity of the first position limiting tube. A first spring is fixedly connected to the lower surface of the first sliding plate. The bottom end of the first spring is fixedly connected to the bottom surface of the inner cavity of the first position limiting tube. A moving column is fixedly connected to the upper surface of the first sliding plate. A placement pad is fixedly connected to the top of the moving column. A first support rod is symmetrically fixedly connected to the outer side surface of the first sliding plate. A tooth plate is fixedly connected to the end of the first support rod.

6. The welding machine according to claim 1, characterized in that: The output end of the fifth servo motor is equipped with a rotating rod through a coupling, and the end of the rotating rod passes through a fixed bracket, and the end of the rotating rod is fixedly connected to a flange shaft. The clamping assembly includes a rotating disk, which is fixedly connected to the flange shaft, and the lower surface of the rotating disk is fixedly connected to a connecting plate, and the bottom end of the connecting plate is fixedly connected to the outer surface of the first limiting tube, and the outer surface of the rotating disk is fixedly connected to a positioning frame, and the number of the positioning frames is several, and the several positioning frames are evenly distributed. A fixing ring passes through the outer surface of the rotating disk, and a rolling bearing is rotatably connected to the inner cavity of the fixing ring, and a rotating column is fixedly connected to the inner ring of the rolling bearing, and the end of the rotating column is fixedly connected to a gear, and the gear is meshed with a toothed plate, and the end of the rotating column away from the gear is fixedly connected to the second limiting tube.

7. The welding machine according to claim 6, characterized in that A second sliding plate is slidably connected to the inner cavity of the second limiting tube, a second spring is fixedly connected to the upper surface of the second sliding plate, a top end of the second spring is fixedly connected to the inner cavity of the second limiting tube, a second support rod is fixedly connected to the outer surface of the rotating disk, an extrusion block is fixedly connected to the end of the second support rod, the extrusion block is extruded and adapted to the lower surface of the second sliding plate, a cone block is fixedly connected to the upper surface of the second sliding plate, a fixed disk is fixedly connected to the top of the second limiting tube, and two symmetrically arranged first sliding grooves are provided on the upper surface of the fixed disk, each of the first sliding grooves is slidably connected to a movable part, each of the movable parts is provided with a first accommodating cavity, and each of the first accommodating cavities is provided with The two parts are slidably connected with the first piston, the opposite sides of the two first pistons are fixedly connected with the first sliding column, the other end of each first sliding column passes through the corresponding movable part and is fixedly connected with a cushion, each soft cushion is connected with the corresponding movable part. Each third spring is sleeved on the outer side of the corresponding first sliding column, the outer wall of the cone block is provided with two symmetrically arranged second sliding grooves, the two second sliding grooves correspond to the positions of the two movable parts one by one, the interior of each second sliding groove is slidably connected with a third sliding plate, and the end of each third sliding plate away from the second sliding groove is fixedly connected with a connecting rod, and each connecting rod is fixedly connected to the corresponding movable part.

8. The welding machine according to claim 7, characterized in that: The outer wall of the second limiting tube is fixedly connected to a fixing rod, a connecting piece is fixedly connected to the fixing rod, a second accommodating chamber is provided inside the connecting piece, a second piston is slidably connected inside the second accommodating chamber, a second sliding column is fixedly connected to one side of the second piston, an end of the second sliding column away from the second piston passes through the connecting piece and is fixedly connected to an anti-slip piece, a fourth spring is connected between the anti-slip piece and the connecting piece, a guide groove is provided inside the fixing rod, the guide groove is communicated with the second accommodating chamber, a guide pipe is fixedly connected to the bottom of one of the movable parts, and the guide pipe is communicated with the guide groove.

9. The welding machine according to claim 8, characterized in that An air suction pipe runs through the upper surface of the transfer box, a collection frame is slidably connected to the inner cavity of the base, a breathable plate runs through the side of the collection frame close to the connecting pipe, and a breathable net is fixedly connected to the axis of the upper surface of the base.

10. A welding method, wherein the welding machine according to claim 9 is used to weld a pipe fitting, wherein: The following steps are involved: Step 1: Place the pipe to be welded on the upper surface of the placement pad, and align the outer surface of the pipe with the multiple positioning frames. Under the action of the gravity of the pipe, the clamping assembly will penetrate into the pipe to complete the positioning of the pipe. Step 2: Control the servo control cabinet and adjust the welding equipment until the welding equipment is located at the position where the pipe fitting needs to be welded, and then control the plasma welding machine control cabinet to make the welding equipment weld the pipe fitting interface position; Step 3: Control the fifth servo motor to make the rotating rod drive the flange shaft and the rotating disk to rotate. When the rotating disk rotates, the joint of the pipe fitting will be fully in contact with the welding equipment.

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