CN117697093A

CN117697093A - Round tube welding machine

Info

Publication number: CN117697093A
Application number: CN202311808220.2A
Authority: CN
Inventors: 张庆芳; 贾肖; 王文卿; 王尚昆
Original assignee: Comus Hebei Intelligent Technology Co ltd
Current assignee: Comus Hebei Intelligent Technology Co ltd
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-03-15

Abstract

The invention relates to the technical field of welding, and provides a circular tube welding machine, which comprises a plurality of welding pieces movably arranged on a bottom frame; the clamping piece sets up on the chassis, and the clamping piece is used for pressing from both sides tight pipe, and the clamping piece includes: the first supporting piece is arranged on the underframe; the first supporting piece and the second supporting piece are used for clamping the round tube and driving the round tube to rotate; the support drags the removal to set up on the chassis, supports and drags and be used for supporting the pipe, through above-mentioned technical scheme, has solved among the prior art alignment in-process and not only can consume a large amount of time, probably takes place the slope moreover, influences the problem of welding effect.

Description

Round tube welding machine

Technical Field

The invention relates to the technical field of welding, in particular to a circular tube welding machine.

Background

The pipeline is a very common material in daily life, is often used for conveying gas, liquid or fluid with solid particles and the like, common pipeline connection modes include flange connection, welding, socket connection, pipeline bonding and the like, wherein the welding mode is a connection mode with low cost and the most stable connection, and is widely applied to the use of various pipelines.

Pipeline welding is usually carried out after actual measurement on site, and due to the complexity of a construction site, the welding operation is often faced with the welding of various pipelines, and the traditional manual welding mode needs to be aligned and welded one by one when facing a large amount of work, so that a large amount of time is consumed, and inclination is possible to occur, so that the using effect is affected.

Disclosure of Invention

The invention provides a circular tube welding machine, which solves the problems that a great amount of time is consumed in the alignment process in the related technology, and the welding effect is affected due to the possibility of inclination.

The technical scheme of the invention is as follows: a round tube welding machine comprising:

a chassis;

the welding pieces are in a plurality and are movably arranged on the underframe;

the clamping piece sets up on the chassis, the clamping piece is used for pressing from both sides tight pipe, the clamping piece includes:

a first support disposed on the chassis;

the first supporting piece and the second supporting piece are used for clamping the round tube and driving the round tube to rotate;

the support drags, and the removal sets up on the chassis, the support drags and is used for supporting the pipe.

As a further technical solution, the first supporting member is slidably disposed on the chassis.

As a further technical solution, the first support member includes:

a first driving member disposed on the chassis;

and the clamping part is arranged on the first driving piece, and the first driving piece is used for driving the clamping part to move.

As a further technical solution, the clamping portion is rotatably disposed on the first driving member, and the second supporting member includes:

the second driving piece is arranged on the underframe;

the rotating part is arranged on the second driving part, the second driving part is used for driving the rotating part to rotate, the rotating part and the clamping part are used for clamping the round tube, and the rotating part drives the round tube to rotate.

As a further technical solution, the support mop includes:

the sliding seat is arranged on the underframe in a sliding manner and is positioned between the first supporting piece and the second supporting piece;

the bracket is movably arranged on the sliding seat;

the support roller is rotatably arranged on the bracket and is used for being abutted with the round pipe.

As a further technical scheme, the method further comprises:

the loading attachment is located chassis one side, loading attachment is used for the pipe material loading, loading attachment includes:

the mechanical arm is positioned at one side of the underframe;

the clamping jaw is arranged on the mechanical arm and used for clamping a round tube.

As a further technical scheme, the clamping jaw has a plurality of, and a plurality of the clamping jaw interval sets up on the arm, the clamping jaw includes:

the two grabbing rods are arranged on the mechanical arm, and a grabbing space is formed between the two grabbing rods;

the rotating wheels are arranged on the two grabbing rods at intervals, are abutted with the round tubes, and drive the rotating wheels to rotate when the round tubes rotate.

As a further technical solution, the mechanical arm further includes:

the support frame is arranged on the mechanical arm;

the first transmission shaft is rotatably arranged on the support frame, one of the grabbing rods is slidably arranged on the first transmission shaft, and the grabbing rods and the first transmission shaft synchronously rotate;

the first gear is arranged on the first transmission shaft, and the first transmission shaft and the first gear synchronously rotate;

the second transmission shaft is rotatably arranged on the support frame, the other grabbing rod is slidably arranged on the second transmission shaft, and the grabbing rod and the second transmission shaft synchronously rotate;

the second gear is arranged on the second transmission shaft and meshed with the first gear;

the third driving piece is arranged on the supporting frame and used for driving the first transmission shaft to rotate.

As a further technical scheme, the method further comprises:

the positioning piece is movably arranged on the underframe and used for positioning the round tube.

As a further technical solution, the positioning member includes:

the movable frame is arranged on the underframe;

the positioning blocks are hinged to the moving frame, and after the moving frame moves, the positioning blocks are close to or far away from the circular tube.

The beneficial effects of the invention are as follows:

in the invention, the second supporting piece is arranged on the slideway of the underframe and can slide along the slideway, the second supporting piece is provided with the locking screw, the locking screw can be rotated by rotating the handle on the second supporting piece, the locking screw is relatively released or clamped by rotation, so that the locking of the second supporting piece is realized, the first supporting piece is provided with the fixing mechanism with the same principle as the second supporting piece, after the welded round tube is placed at a designated position, the fixing of the round tube can be realized by adjusting the positions of the first supporting piece and the second supporting piece, and in actual use, the clamping mode is simple in principle, convenient to manufacture and use, low in manufacturing cost and quite effective in fixing of the round tube, and the position of the first supporting piece and the second supporting piece can be manually adjusted and the handle can be fixed, and also components such as an air cylinder and a motor can be installed, so that automatic control is realized; the welding piece is arranged on the first bracket, the first bracket is arranged on the second bracket, the second bracket is arranged on the bottom frame in a sliding way, the second bracket is used for controlling the welding piece to move left and right, the automatic movement is realized through the operation of the motor arranged on the second bracket, the first bracket is used for controlling the welding piece to move back and forth, the motor arranged on the first bracket is used for moving, the welding piece can move along the first bracket in the up-down direction, the welding piece can move along the first bracket, the welding work of the welding seam at any position in the clamping space can be completed through the combined control of the three motors, the application range of the equipment is greatly improved, meanwhile, the motor automatically works, the labor cost is saved, the control of the motor is relatively more manual, and the welding quality is improved; the welding piece is provided with an argon arc welding machine and a carbon dioxide gas shielded welding machine, pipelines with different welding requirements can be welded by equipment through two different welding machines, the application range of the equipment is further improved, meanwhile, the device is limited to the two welding machines, and the types of the welding machines can be replaced to realize other welding requirements.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of another view angle structure of the present invention;

FIG. 3 is a schematic diagram of a loading device according to the present invention;

FIG. 4 is a schematic view of the structure of the welding member, the bracket and the clamping member of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4A in accordance with the present invention;

FIG. 6 is a schematic view of another view angle structure of the feeding device of the present invention;

FIG. 7 is an enlarged view of a portion of the invention at B in FIG. 6;

in the figure: 1. the device comprises a chassis, 2, welding pieces, 3, clamping pieces, 310, a first supporting piece, 320, a second supporting piece, 330, a supporting drag, 311, a first driving piece, 312, a clamping part, 321, a second driving piece, 322, a rotating part, 331, a sliding seat, 332, a bracket, 333, a supporting roller, 4, a feeding device, 410, a mechanical arm, 420, a clamping jaw, 421, a clamping rod, 422, a clamping space, 423, a rotating wheel, 411, a supporting frame, 412, a first transmission shaft, 413, a first gear, 414, a second transmission shaft, 415, a second gear, 416, a third driving piece, 5, a positioning piece, 510, a moving frame, 520, a positioning block, 110, a first bracket, 120, a second bracket, 6 and a collecting box.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 7, this embodiment provides a circular tube welding machine, including: a chassis 1; the welding pieces 2 are arranged on the underframe 1 in a moving way; the clamping piece 3 sets up on chassis 1, and clamping piece 3 is used for pressing from both sides tight pipe, and clamping piece 3 includes: the first support 310 is provided on the chassis 1; the second supporting piece 320 is arranged on the underframe 1, and the first supporting piece 310 and the second supporting piece 320 are used for clamping the round tube and driving the round tube to rotate; the supporting towing 330 is movably arranged on the underframe 1, and the supporting towing 330 is used for supporting the round tube.

In this embodiment, the specific working principle is that when in use, a round tube to be welded is placed on the support puller 330, the first support member 310 and the second support member 320 are moved, the round tube is clamped on the welding machine, and a proper welding member 2 is selected for welding.

In this embodiment, the second supporting member 320 is installed on the slideway of the chassis 1, and can slide along the slideway, the second supporting member 320 is provided with a locking screw, the locking screw can be rotated by rotating the handle on the second supporting member 320, and the locking screw is relatively released or clamped by rotation, so that the second supporting member 320 is locked, the first supporting member 310 is provided with a fixing mechanism with the same principle as the second supporting member 320, after the welded round tube is placed at a designated position, the fixing of the round tube can be realized by adjusting the positions of the first supporting member 310 and the second supporting member 320, and in actual use, not only the positions of the round tube can be manually adjusted and the handle can be rotated, but also components such as an air cylinder and a motor can be installed, so that automatic control is realized. The welding piece 2 is arranged on the first bracket 110, the first bracket 110 is arranged on the second bracket 120, the second bracket 120 is arranged on the bottom frame 1 in a sliding way, the second bracket 120 is used for controlling the welding piece 2 to move left and right, automatic movement is realized through the operation of a motor arranged on the second bracket 120, the first bracket 110 is used for controlling the welding piece 2 to move back and forth, the motor arranged on the first bracket 110 is used for moving, the welding piece 2 can move along the first bracket 110 in the vertical direction, the welding work of a welding seam at any position in a clamping space can be completed through the joint control of three motors, the application range of equipment is greatly improved, meanwhile, the motor automatically works, the labor cost is saved, the control of the motor is relatively more accurate, and the welding quality is improved; the welding piece 2 is provided with an argon arc welding machine and a carbon dioxide gas shielded welding machine, pipelines with different welding requirements can be welded by equipment through two different welding machines, the application range of the equipment is further improved, meanwhile, the device is limited to the two welding machines, and the types of the welding machines can be replaced to realize other welding requirements.

Further, the first support 310 is slidably provided on the chassis 1.

In this embodiment, the first support frame is also arranged on the slideway of the underframe 1, when the welded piece is fixed, the position of the first support frame and the position of the second support piece 320 are adjusted, so that the whole welded piece can be moved on the welding machine, the whole position of the welded piece can be adjusted, the welding of pipelines with different lengths can be adapted by adopting the mode, the position of the welding seam can be adjusted, the welding work can be carried out more conveniently and rapidly, and the working time is shortened.

Further, the first support 310 includes: the first driving piece 311 is arranged on the chassis 1; the clamping portion 312 is disposed on the first driving member 311, and the first driving member 311 is configured to drive the clamping portion 312 to move.

In this embodiment, the first support member 310 is provided with the fixed pipeline clamping member 3, the clamping member 3 is rotatably arranged on the first support member 310, the clamping member 3 can rotate through the driving of the first driving member 311, when the welded pipeline is fixed in the clamping member 3, the rotation of the clamping member 3 can drive the welded member to synchronously rotate, the welding machine performs welding operation at the welding seam when the welded member rotates, so that the welding seam of the welded member can be completely welded, meanwhile, the first driving member 311 is a rotating shaft and is driven through a handle, a motor can be connected, the motor can be rotated through the operation of the motor, the welded member can be rotated through both driving modes, the welding operation speed can be effectively controlled through manual operation, the welding operation can be performed by virtue of manual experience, and only the manual operation of the rotating handle is needed to perform welding, so that the welding difficulty is simplified, the working efficiency is improved, the welding machine rotates, the welding seam is more uniform, the labor force is saved, and the welding efficiency is improved.

In this embodiment, the first driving member 311 is capable of clamping the welded pipe, if the device does not clamp the welded pipe, the welded member 2 will shake during welding, if the shake amplitude is large, even the welding gun of the welding machine will be damaged, so that economic loss is caused, the welded member 2 can be completely clamped, the above problem can be avoided, and meanwhile, the welding seam at the welding position is more attractive, and the welding quality is improved.

Further, the clamping portion 312 is rotatably provided on the first driving member 311, and the second supporting member 320 includes: the second driving piece 321 is disposed on the chassis 1; the rotating part 322 is arranged on the second driving piece 321, the second driving piece 321 is used for driving the rotating part 322 to rotate, the rotating part 322 and the clamping part 312 are used for clamping the round tube, and the rotating part 322 drives the round tube to rotate.

In this embodiment, after the second supporting element 320 and the first supporting element 310 slide to adjust the positions and clamp the welded element 2 between the clamping portion 312 and the rotating portion 322, because the welded element 2 is cylindrical, the welded element needs to be rotated when welding is to be completed, one end of the rotating portion 322 is a fixed end, the welded element can be clamped by matching with the clamping portion 312, meanwhile, the rotating portion 322 is a rotating shaft, the rotating portion 322 can rotate by rotating the handle at the other end, and then the welded element is driven to rotate synchronously, so that welding of round tubes is realized.

In this embodiment, since the welded part 2 is a circular tube, even if the welding machine can move in different directions in the device, the welding gun cannot move to the back of the welded part due to movement of the welding gun, so that the welded part needs to be rotated in order to completely weld the position to be welded, so that the welded part can be welded, the welding quality can be checked more intuitively and conveniently, and the working efficiency is improved.

Further, the support drag 330 includes: the sliding seat 331 is slidably disposed on the chassis 1, and the sliding seat 331 is located between the first support 310 and the second support 320; the bracket 332 is movably arranged on the sliding seat 331; the supporting roller 333 is rotatably disposed on the bracket 332, and the supporting roller 333 is used for abutting against the round tube.

In this embodiment, the sliding seat 331 can slide on the chassis 1, and meanwhile, the height of the bracket 332 can also be adjusted, before the welded piece is placed, the positions of the sliding seat 331 and the bracket 332 can be adjusted through two adjusting handles on the sliding seat 331 and the bracket 332, so that the device can adapt to pipelines with different diameters by adjusting the positions of the supporting and dragging 330 before placing pipelines with different diameters, and thus, the time for fixing the welded pipeline is shortened and the welding efficiency is improved by preferentially adjusting the positions of the supporting and dragging 330.

In this embodiment, the welded pipe is first placed on the sliding seat 331 before being clamped by the first supporting member 310 and the second supporting member 320, the height of the sliding seat 331 can be adjusted, and usually after the height of the sliding seat 331 is adjusted to a position suitable for the batch of pipes before welding a batch of pipes, the height is fixed, when the welded pipe is placed, the position of the welded piece is fixed by the sliding seat 331 as long as the welded pipe is first placed on the fixed seat, then the positions of the first supporting frame and the second supporting frame are adjusted, the welded piece 2 is clamped, the welded piece 2 is welded, when the welding is performed, the welded piece needs to rotate, the supporting roller 333 is arranged on the sliding seat 331 in a rolling manner and abuts against the welded piece, therefore, when the welded piece rotates, the sliding seat 331 still has a supporting effect due to the existence of the supporting roller 333, but the sliding seat 331 does not influence the rotation of the welded piece, and the use of the supporting roller 333 enables the welded piece to be placed more quickly and conveniently, the placing time is saved, and the working quality and the working efficiency are improved.

Further, the method further comprises the following steps: the loading attachment 4 is located chassis 1 one side, and loading attachment 4 is used for the pipe material loading, and loading attachment 4 includes: the mechanical arm 410 is located at one side of the chassis 1; the clamping jaw 420 is arranged on the mechanical arm 410, and the clamping jaw 420 is used for clamping a round tube.

In the embodiment, if the welded parts are only a few or more than ten parts in small batches, the welding operation can be completed in a manual feeding mode, but if a very large number of pipelines are required to be welded, the manual feeding mode is adopted, so that the work is heavy, the probability of human error is increased due to long-term repeated operation, the quality of the welded parts is influenced, and therefore, the feeding device 4 is adopted for high-strength repeated feeding, so that the labor force is liberated, and the efficiency and the quality are higher than those of the manual operation; the feeding device 4 mainly moves the welded piece from a designated place to the supporting drag 330 of the welding machine, the mechanical arm 410 is adopted to realize the horizontal and vertical movement of the welded piece, the movement can also be realized jointly in the forms of a conveying belt, a slideway and the like, the mechanical arm 410 can reciprocate between the ground and the supporting drag 330 through the presetting of the program of the mechanical arm 410, the mechanical arm 410 can wait for the clamping jaw 420 to act and weld after reaching the designated place through the timing of the action of the mechanical arm, so that the automatic discharging is realized, the mechanical arm 410 is adopted to realize the discharging and positioning, the labor force is liberated, the precise control of the discharging position can be realized, and the quality of the welded piece is ensured.

Further, the clamping jaw 420 has a plurality of, and a plurality of clamping jaws 420 interval sets up on the arm 410, and clamping jaw 420 includes: the two grabbing rods 421 are arranged on the mechanical arm 410, and a grabbing space 422 is formed between the two grabbing rods 421; the rotating wheel 423 is provided with a plurality of rotating wheels, the rotating wheels 423 are arranged on the two grabbing rods 421 at intervals, the rotating wheels 423 are abutted with the round pipe, and the rotating wheels 423 are driven to rotate when the round pipe rotates.

In this embodiment, the two grabbing rods 421 are arc-shaped, the two grabbing rods 421 are in a pair and are mirror-image arranged on the mechanical arm 410, the two grabbing rods 421 are mirror-image rotated relative to the mechanical arm 410, so that the clamping space between the grabbing rods 421 is released or clamped, when in actual use, the grabbing rods 421 are in an open state, the mechanical arm 410 moves at this moment, when the mechanical arm 410 arrives at the workpiece taking position, the grabbing rods 421 rotate, so that the clamping space between the grabbing rods 421 clamps the workpiece to be welded, after clamping, the mechanical arm 410 acts to bring the workpiece to be welded onto the supporting bracket 330, and because the grabbing rods 421 are provided with the rotating wheels 423, even though the grabbing rods 421 clamp, the workpiece to be welded can still rotate on the grabbing rods 421, the welding process is not affected, and through the design of the clamping jaws 420 and the rotating wheels 423, a fixing mode is added to enable the pipeline which is originally only fixed by the supporting bracket 330 to be more stable when the workpiece to be fixed on the supporting bracket, and the workpiece to be fixed on the supporting bracket.

Further, the mechanical arm 410 further includes: the support 411 is disposed on the mechanical arm 410; the first transmission shaft 412 is rotatably arranged on the support frame 411, one of the grabbing rods 421 is slidably arranged on the first transmission shaft 412, and the grabbing rods 421 and the first transmission shaft 412 rotate synchronously; the first gear 413 is arranged on the first transmission shaft 412, and the first transmission shaft 412 rotates synchronously with the first gear 413; the second transmission shaft 414 is rotatably arranged on the support frame 411, the other grabbing rod 421 is slidably arranged on the second transmission shaft 414, and the grabbing rod 421 and the second transmission shaft 414 synchronously rotate; the second gear 415 is arranged on the second transmission shaft 414, and the second gear 415 is meshed with the first gear 413; the third driving member 416 is disposed on the supporting frame 411, and the third driving member 416 is used for driving the first transmission shaft 412 to rotate.

In this embodiment, the specific working principle is as follows: the third driving member 416 drives the first driving shaft 412 to rotate, the first driving shaft 412 drives the first gear 413, the first gear 413 is meshed with the second gear 415, the first gear 413 rotates to enable the second gear 415 to rotate reversely, so that the second driving shaft 414 also rotates, and the clamping jaws 420 rotate simultaneously when the two driving shafts rotate reversely, so that the two clamping jaws 420 are clamped and released. Simultaneously, the clamping jaw 420 can slide on the transmission shaft, so that the two clamping jaws 420 can be misplaced for clamping pipelines with smaller diameters, simultaneously after the pipelines are clamped, the clamping jaw 420 and the pipelines can also slide on the first transmission shaft 412 and the second transmission shaft 414 at the same time, conditions are created for subsequent accurate positioning, stable clamping is realized by utilizing a simple structure, the clamping range is expanded, the side walls of the pipelines with different pipe diameters can be always abutted to the supporting frame 411 by the misplaced arrangement of the two clamping jaws 420, and the center of the pipelines is initially positioned on the supporting frame 411.

Further, the method further comprises the following steps: the locating piece 5 is movably arranged on the underframe 1, and the locating piece 5 is used for locating the round tube.

In this embodiment, the positioning piece 5 is used for positioning a position of a welded piece to be welded, and since the grabbing rod 421 can slide relative to the mechanical arm 410 to a certain extent, after the mechanical arm 410 performs a preliminary positioning on the welded piece, the horizontal position of the welded piece can be properly adjusted when the mechanical arm 410 clamps the welded piece, during the adjustment process, the position of the welding seam can be moved, when the welding seam moves to the position of the positioning piece 5, the positioning piece 5 can be positioned to the position of the welding seam, and also can be manually operated to position the welding seam to a proper position, after the positioning is completed, the first support piece 310 and the second support piece 320 are thoroughly fixed, so that the position of the welded piece is fixed, the welding position and quality are ensured, and the welding quality is improved, thereby avoiding the problem that the welding position deviates from the equipment and cannot perform welding.

Further, the positioning member 5 includes: the moving frame 510 is provided on the bottom frame 1; the positioning blocks 520 are provided with a plurality of positioning blocks, and are hinged on the movable frame 510, and after the movable frame 510 moves, the positioning blocks 520 are close to or far away from the circular tube.

In this embodiment, the movable frame 510 can move relative to the chassis 1, after the positioning piece 5 finishes positioning, the movable frame 510 can move, so that the positioning piece 520 is far away from the welded piece, the welding operation is prevented from being influenced by the existence of the positioning piece 520, the welding seam is damaged, one end of the movable frame 510 slides on the chassis 1, the other end of the movable frame is arc-shaped, a plurality of positioning pieces 520 are arranged in the arc-shaped surface, the positioning pieces 520 are hinged in the arc-shaped surface, each positioning piece 520 can rotate on the arc-shaped surface, and the rotating arc-shaped blocks can automatically adapt through the rotation of the positioning pieces when facing pipes with different diameters, so that the positioning piece 5 can still well position when facing pipes with different diameters, the positioning quality is ensured, the working efficiency is improved, the time spent in manual positioning is saved, and the application range of equipment is also enlarged.

Further, a collecting box 6 is provided between the first support 310 and the second support 320 for receiving sparks and slag from which the welding operation is performed.

In this embodiment, collect box 6 is detachable square box, collect box 6 top for the import, when using, place collection box 6 under the welding seam, the produced most sparks of welding and welding slag etc. can directly fall into collection box 6, even there is a small amount of welding slag not to fall into collection box 6 like this, also can reduce the device and need clear frequency, when collection box 6 needs the clearance, only need take off it just can be by the clearance, the degree of difficulty of clearance has been reduced, clean efficiency has been improved.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. Circular pipe welding machine, its characterized in that includes:

a chassis (1);

the welding pieces (2) are arranged on the underframe (1) in a moving way;

clamping piece (3) is provided on chassis (1), clamping piece (3) are used for pressing from both sides tight pipe, clamping piece (3) include:

a first support (310) arranged on the chassis (1);

the second supporting piece (320) is arranged on the underframe (1), and the first supporting piece (310) and the second supporting piece (320) are used for clamping a circular tube and driving the circular tube to rotate;

and the supporting towing (330) is movably arranged on the underframe (1), and the supporting towing (330) is used for supporting the round tube.

2. The machine according to claim 1, characterized in that said first support (310) is slidingly arranged on said undercarriage (1).

3. The pipe welding machine of claim 2, wherein the first support (310) comprises:

a first driving member (311) provided on the chassis (1);

and the clamping part (312) is arranged on the first driving piece (311), and the first driving piece (311) is used for driving the clamping part (312) to move.

4. A machine for welding round tubes according to claim 3, characterized in that said gripping portion (312) is rotatably arranged on said first driving member (311), said second supporting member (320) comprising:

a second driving member (321) provided on the chassis (1);

the rotating part (322) is arranged on the second driving piece (321), the second driving piece is used for driving the rotating part to rotate, the rotating part (322) and the clamping part (312) are used for clamping a circular tube, and the rotating part (322) drives the circular tube to rotate.

5. The pipe welding machine of claim 1 wherein the support sled (330) comprises:

a sliding seat (331) slidably disposed on the chassis (1), the sliding seat (331) being located between the first support (310) and the second support (320);

a bracket (332) movably disposed on the slide seat (331);

and the supporting roller (333) is rotatably arranged on the bracket (332), and the supporting roller (333) is abutted with the round tube.

6. The pipe welding machine of claim 1, further comprising:

loading attachment (4) are located chassis (1) one side, loading attachment (4) are used for the pipe material loading, loading attachment (4) include:

a mechanical arm (410) positioned at one side of the underframe (1);

and the clamping jaw (420) is arranged on the mechanical arm (410), and the clamping jaw (420) is used for clamping a round tube.

7. The pipe welding machine according to claim 6, characterized in that said clamping jaws (420) are provided in number, said clamping jaws (420) being arranged at intervals on said mechanical arm (410), said clamping jaws (420) comprising:

the two grabbing rods (421) are arranged on the mechanical arm (410), and a grabbing space (422) is formed between the two grabbing rods (421);

the rotating wheels (423) are arranged on the two grabbing rods (421) at intervals, the rotating wheels (423) are in butt joint with the round tubes, and the rotating wheels (423) are driven to rotate when the round tubes rotate.

8. The pipe welding machine of claim 7, wherein the robotic arm (410) further comprises:

a support frame (411) provided on the robot arm (410);

the first transmission shaft (412) is rotatably arranged on the support frame (411), one grabbing rod (421) is slidably arranged on the first transmission shaft (412), and the grabbing rod (421) and the first transmission shaft (412) synchronously rotate;

a first gear (413) disposed on the first transmission shaft (412), the first transmission shaft (412) rotating synchronously with the first gear (413);

the second transmission shaft (414) is rotatably arranged on the support frame (411), the other grabbing rod (421) is slidably arranged on the second transmission shaft (412), and the grabbing rod (421) and the second transmission shaft (412) synchronously rotate;

a second gear (415) disposed on the second transmission shaft (414), the second gear (415) being meshed with the first gear (413);

and the third driving piece (416) is arranged on the supporting frame (411), and the third driving piece (416) is used for driving the first transmission shaft (412) to rotate.

9. The pipe welding machine of claim 1, further comprising:

the positioning piece (5) is movably arranged on the underframe (1), and the positioning piece (5) is used for positioning the round tube.

10. The machine according to claim 9, characterized in that said positioning element (5) comprises:

a moving frame (510) provided on the chassis (1);

the positioning blocks (520) are hinged to the movable frame (510), and after the movable frame (510) moves, the positioning blocks (520) are close to or far away from the circular tube.