Multifunctional welding support

Abstract

The invention relates to the technical field of auxiliary devices for welding, in particular to a multifunctional welding support. The technical scheme comprises a processing table; the fixed table is fixedly connected to the rear side of the middle of the processing table; the movable seat is slidably connected to the fixed table; the first rolling wheels are rotationally connected to all the moving seats; the supporting frames are arranged on the moving seats located on the rear sides in the different sets in a sliding mode; the connecting block is connected to the supporting frame in a sliding manner; the second roller is rotationally connected to the lower part of each connecting block; multi-point-position self-adaptive clamping is achieved through the moving seats, the first rolling wheels and the second rolling wheels which can synchronously move in the opposite directions, and rapid preliminary centering, stable clamping and accurate automatic butt joint of giant circular pipes are achieved through the synergistic effect of the receding positioning plates; during welding, the round pipe is driven by the first rolling wheel to rotate at a constant speed and is matched with the fixed welding gun, high-quality full-circumferential automatic welding can be completed, and the convenience of welding operation and the precision and consistency of welding quality are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding auxiliary device, in particular to a multifunctional welding support. BACKGROUND

[0002] As key transportation channels and structural components, giant round pipes (such as large-diameter oil and gas pipelines, offshore platform columns, etc.) are widely used in energy transportation, offshore engineering and large-scale construction fields. Such components usually have the characteristics of large diameter and thick wall, and in the process of manufacturing and installation, multiple continuous welds along the circumference of the pipe body are often required, which puts high requirements on the precision, consistency and structural strength of welding.

[0003] To improve the welding efficiency and quality, the existing technology has gradually adopted automatic welding devices to realize the continuity and automation of the welding process. However, the premise of adopting automatic welding method is to realize stable and accurate positioning and clamping of the round pipe, to ensure that the welding gun runs along the set trajectory, to ensure that the fusion on both sides of the weld is uniform, and to avoid problems such as partial welding, insufficient penetration or asymmetric weld. Especially for the welding of large-size and large-weight round pipes, if the clamping is not firm or the positioning is not accurate, displacement or deformation is likely to occur during welding, affecting the welding precision and the structural strength of the finished product. SUMMARY

[0004] In view of the defects of the existing technology mentioned above, the present application provides a multifunctional welding support, which can realize flexible and stable clamping of the round pipe while ensuring the positioning accuracy of welding, and support flexible position adjustment and continuous welding operation, to improve the convenience, adaptability and overall welding quality of the welding operation.

[0005] Technical scheme: A multifunctional welding support, comprising: a workbench; a fixed table fixedly connected to the rear side of the middle part of the workbench, and a welding gun fixed to the fixed table; a moving seat slidably connected to the fixed table in the left-right direction, the moving seat being provided in two groups, and the two groups of moving seats being symmetrically arranged on the left and right sides of the workbench; a first roller rotatably connected to each moving seat for supporting the round pipe and capable of driving the round pipe to rotate around its axis; a support frame slidably arranged on the moving seat at the rear side in different groups in the vertical direction; a connecting block slidably connected to the support frame in the front-rear direction, two connecting blocks being arranged on each support frame; a second roller rotatably connected to the lower part of each connecting block; the support frame can drive the second roller to cooperate with the first roller to clamp the round pipe, and the two groups of moving seats can drive the clamped round pipes to move closer to each other; an opening is formed in the middle part of the workbench, and a mounting bracket is fixedly connected to the opening in the center of the workbench; a guide rod is fixedly connected to the mounting bracket; a mounting block is slidably connected to the guide rod in the vertical direction and can be vertically lifted under the drive; and two positioning plates are arranged on the left and right sides of the mounting block.

[0006] Further, particularly preferably, the support further comprises: two positioning plates and a mounting block in sliding connection; the support further comprises: a first reset spring, sleeved on the guide rod, two ends of which are fixed to the mounting block and the mounting frame respectively; a second reset spring, sleeved on the sliding shaft of each positioning plate, two ends of which are fixed to the positioning plate and the mounting block respectively; a support block, fixedly connected to the bottom side of the rear part of the processing table; a rod frame, in sliding connection with the support block in the front-rear direction; a control block, fixedly connected to the rear end of the rod frame, both sides of which are provided with inclined contact surfaces; a connecting rod, two ends of which are hingedly connected to the front end of the rod frame and the lower part of the mounting block respectively; a third reset spring, sleeved on the rod frame, two ends of which are fixed to the support block and the rod frame respectively; two groups of support frames, fixedly connected to the left and right sides below the rear part of the processing table respectively; control arms, in sliding connection with each support frame in the left-right direction, one end of each control arm is fixed to a moving seat on the rear side in a different group, and the other end cooperates with the inclined contact surfaces on both sides of the control block.

[0007] Further, particularly preferably, the support further comprises: a first electric push rod, fixedly connected to the moving seat on the rear side in a different group, the telescopic end of which is fixedly connected to the support frame, for driving the support frame to vertically ascend and descend.

[0008] Further, particularly preferably, the support further comprises: two first adjusting screw rods, rotatably connected in the processing table, two ends of which are provided with threads with opposite rotation directions, the threads on the two sides of the two first adjusting screw rods are respectively in thread cooperation with the two moving seats on the same side in a different group; a first motor, fixedly connected in the processing table, the output end of which is coaxially fixed with one of the first adjusting screw rods; a first synchronous belt group, arranged between the two first adjusting screw rods, for synchronously rotating the two first adjusting screw rods.

[0009] Further, particularly preferably, the support further comprises: a second adjusting screw rod, rotatably connected to each support frame, both ends of which are provided with threads with opposite rotation directions, and the threads on the two sides are respectively in thread cooperation with the two connecting blocks on the corresponding support frame; a second motor, fixedly connected to each support frame, the output end of which is coaxially fixed with the corresponding second adjusting screw rod.

[0010] Further, particularly preferably, the support further comprises: two spline shafts, rotatably connected in the processing table, the spline teeth of each spline shaft are respectively in spline cooperation with the first rollers on the two moving seats on the same side in a different group; a third motor, fixedly connected to the processing table, the output end of which is in transmission connection with one of the spline shafts; a second synchronous belt group, arranged between the two spline shafts, for synchronously rotating the two spline shafts.

[0011] In addition, it is particularly preferred that the support further comprises: a second electric push rod fixedly connected to the fixed table; a polisher fixedly connected to the end of the telescopic rod of the second electric push rod, which moves in the front-back direction under the drive of the second electric push rod, and is used for polishing the welded seam after welding; and a collection bin detachably fixedly connected below the processing table and opposite to the opening position in the center of the processing table, which is used for collecting the debris generated in the polishing process.

[0012] In addition, it is particularly preferred that the support further comprises: a purifier fixedly connected to the fixed table, with the air inlet facing the welding operation area, which is used for absorbing the welding fume generated in the welding process.

[0013] In addition, it is particularly preferred that the support further comprises: a rolling ball movably embedded on the left and right sides of the processing table, which is used for auxiliary supporting the circular pipe.

[0014] In addition, it is particularly preferred that the support further comprises: a contact wheel rotatably connected to the other end of each control arm, so that each control arm is in contact with the inclined contact surface on the two sides of the control block through the contact wheel.

[0015] Beneficial effects: the present application realizes the rapid initial centering, stable clamping and accurate automatic docking of the giant circular pipe through the coordinated action of the movable seat that can move synchronously and oppositely, the first roller and the second roller that realize multi-point self-adaptive clamping, and the avoidable positioning plate; during welding, the circular pipe is driven to rotate at a constant speed by the first roller, and the fixed welding gun can complete the high-quality automatic welding of the whole circumference, which significantly improves the convenience of the welding operation and the precision and consistency of the welding quality.

[0016] The present application can quickly adapt to circular pipes of different sizes through the independent adjustment of the clamping width of the second roller on each support frame by the second adjusting screw; the spline shaft transmission design ensures power transmission while allowing the first roller to change position with the movable seat, thereby realizing wide-range and automatic adaptation to the size of the circular pipe, and enhancing the universality of the present application.

[0017] The lowering and avoiding action of the positioning plate is automatically triggered by the movement of the movable seat through the transmission structure of the control arm, the control block and the connecting rod, and the reset is realized by each reset spring, without the need for additional independent control, that is, the present application can realize high-precision synchronization of the positioning and avoiding actions with the welding process, and has reliable structure, timely response, and ensures the coherence and efficiency of the operation process of the present application.

[0018] The present application integrates the polisher driven by the second electric push rod, which can polish the welded seam after welding or synchronously, realizes the continuous operation of welding and surface treatment at the same work station, and effectively improves the appearance quality of the welded seam and the overall processing efficiency.

[0019] The detachable collecting bin and the fixed purifier are arranged to concentrate the polishing debris and purify the welding smoke in real time, so as to control the dust and smoke pollution in the operation process of the application, keep the working area clean, improve the operation environment, and meet the safety production requirements. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the application.

[0021] Figure 2 It is the overall structure sectional view of the application after the local section of the processing table.

[0022] Figure 3 It is the position structure sectional view of the first roller and the second roller on the processing table in the application.

[0023] Figure 4 It is the connection structure schematic diagram of the second roller in the application.

[0024] Figure 5 It is the connection structure schematic diagram of the first roller in the application.

[0025] Figure 6 It is the position structure sectional view of the positioning plate on the processing table in the application.

[0026] Figure 7 It is the cooperation structure schematic diagram of the positioning plate and the moving seat in the application.

[0027] Figure 8 It is the connection structure schematic diagram of the positioning plate in the application.

[0028] Figure 9 It is the position structure schematic diagram of the welding gun, the polisher and the purifier in the application.

[0029] Figure 10 It is the connection structure schematic diagram of the collecting bin in the application.

[0030] In the diagram: 001, welding torch; 101, machining table; 102, fixed platform; 103, movable seat; 104, first roller; 105, support frame; 106, connecting block; 107, second roller; 108, ball bearing; 201, first electric push rod; 202, first adjusting screw; 203, first motor; 204, first synchronous belt assembly; 205, second adjusting screw; 206, second motor; 207, splined shaft; 208, third motor; 209. Second synchronous belt assembly, 301, mounting bracket, 302, guide rod, 303, mounting block, 304, first return spring, 305, positioning plate, 306, second return spring, 307, support block, 308, rod frame, 309, control block, 310, connecting rod, 311, third return spring, 312, support frame, 313, control arm, 314, contact wheel, 401, second electric push rod, 402, polisher, 403, collection chamber, 404, purifier. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0032] Example: A multifunctional welding bracket, combined with Figures 1-3 As shown, it includes: a processing table 101; a fixed platform 102, fixedly installed on the rear side of the middle part of the processing table 101, with the welding torch 001 fixed on the fixed platform 102; a movable seat 103, slidably installed on the fixed platform 102 in the left-right direction, with two sets of movable seats 103 arranged in pairs, symmetrically arranged on the left and right sides of the processing table 101; and a first roller 104, rotatably installed on each movable seat 103, used to support the round tube, and can drive the round tube to rotate under drive. The tube rotates on its own axis; the support frame 105 is slidably mounted vertically on the movable seat 103 located at the rear in different groups; the connecting block 106 is slidably mounted on the support frame 105 in the front-back direction, and two connecting blocks 106 are provided on each support frame 105; the second roller 107 is rotatably mounted on the lower part of each connecting block 106; the ball bearing 108 is embedded and movably mounted on the left and right sides of the processing table 101 to assist in supporting the round tube and reduce the frictional resistance of the round tube during movement.

[0033] Combination Figures 1-5As shown, the bracket also includes: a first electric push rod 201, fixedly installed on the rear movable seat 103 in different groups, its telescopic end being fixedly connected to the support frame 105, used to drive the support frame 105 to rise and fall vertically; two first adjusting screws 202, rotatably installed inside the processing table 101, with opposite threads at both ends, the threads on both sides of the two first adjusting screws 202 respectively engaging with the two movable seats 103 in different groups located on the same side; and a first motor 203, fixedly installed... The first adjusting screw 202 is installed inside the processing table 101, and its output end is coaxially fixed with one of the first adjusting screws 202. The first synchronous belt group 204 is located between the two first adjusting screws 202. It consists of synchronous pulleys fixed on the shafts of the two first adjusting screws 202 respectively and a synchronous belt wound between the two synchronous pulleys, so that the two first adjusting screws 202 rotate synchronously, thereby driving the two sets of moving seats 103 to move synchronously in opposite directions. The second adjusting screw 205 is rotatably mounted on each support frame 105, and both ends of it are provided with screws. The threads on both sides are opposite, and respectively engage with the threads of two connecting blocks 106 on the corresponding support frame 105; the second motor 206 is fixedly installed on each support frame 105, and its output end is coaxially fixed with the corresponding second adjusting screw 205, driving the two connecting blocks 106 and the second roller 107 to move closer or further away synchronously; two splined shafts 207 are rotatably installed in the machining table 101, and the spline teeth of each splined shaft 207 respectively engage with the threads of two moving seats 103 on the same side in different groups. The first roller 104 is splined to adapt to the positional changes of the moving seat 103 while transmitting power; the third motor 208 is fixedly mounted on the processing table 101, and its output end is connected to one of the spline shafts 207; the second synchronous belt group 209 is located between the two spline shafts 207, and consists of synchronous pulleys fixed on the two spline shafts 207 respectively and a synchronous belt wound between the two synchronous pulleys, so that the two spline shafts 207 rotate synchronously, thereby driving all the first rollers 104 to rotate synchronously.

[0034] In this embodiment, to ensure that the movement of the components does not interfere with the circular tube, the second motor 206 is connected to the spline shaft 207 via a transmission belt assembly to adjust the installation position. The first synchronous belt assembly 204 and the second synchronous belt assembly 209 both use rotatable shafts to adjust their positions. The processing table 101 is provided with grooves along the symmetrical center lines of each set of movable seats 103 to provide space for the curvature of the lower surface of the circular tube when the first roller 104 supports the small-diameter circular tube. The ball bearings 108 are symmetrically arranged on both sides of the grooves, so that the circular tube is supported only by the first roller 104 and the ball bearings 108 in this bracket when it is in operation, so as to ensure the smoothness of the circular tube displacement.

[0035] In use, the two sections of round tubes to be welded are placed on the movable seats 103 on both sides. The first electric push rod 201 is activated to control the support frame 105 to move downward, so that the first roller 104 and the second roller 107 together form a multi-point stable clamping of the round tubes. Then, the first motor 203 is activated, which drives the two sets of movable seats 103 to move synchronously towards each other through the first adjusting screw 202, so that the two sections of round tubes are automatically and precisely connected. After the connection is completed, the welding gun 001 is activated, and the third motor 208 is activated at the same time. The first roller 104 is driven to rotate the round tube at a uniform speed through the spline shaft 207, so as to realize the automatic welding of the circumferential seam of the round tube. In addition, by controlling the second motor 206, the distance between the two second rollers 107 on the same support frame 105 can be adjusted to ensure the clamping stability of round tubes of different sizes. That is, this bracket can flexibly adapt to the clamping requirements of round tubes of different diameters, thereby improving the compatibility and clamping stability of round tubes of different specifications.

[0036] The multi-point collaborative clamping structure formed by the first roller 104 and the adjustable second roller 107 provides stable support for the round tube throughout the welding process, effectively preventing tube displacement and ensuring the accuracy of the automatic welding trajectory during operation. Through the combination of various adjusting screws and the spline shaft 207, the spacing of the moving seat 103, the clamping width of the second roller 107, and the rotation of the round tube can be independently and controllably adjusted. This allows the support to adapt to round tubes of different sizes without changing tooling, significantly improving the ease of operation and equipment utilization. This support integrates automatic tube centering, rotation drive, and welding functions, achieving fully automated operation from clamping and butt jointing to welding. This not only reduces labor intensity but also ensures uniform and consistent weld formation through the stability of the mechanical drive, improving welding quality and operational efficiency.

[0037] Combination Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8As shown, the processing table 101 has an opening in the middle. The bracket also includes: a mounting frame 301, fixedly mounted at the opening in the center of the processing table 101; a guide rod 302, fixedly mounted on the mounting frame 301; a mounting block 303, slidably mounted on the guide rod 302 in a vertical direction; a first return spring 304, sleeved on the guide rod 302, with its two ends fixed to the mounting block 303 and the mounting frame 301 respectively; two positioning plates 305, slidably mounted on the left and right sides of the mounting block 303 respectively; a second return spring 306, sleeved on the sliding shaft of each positioning plate 305, with its two ends fixed to the positioning plate 305 and the mounting block 303 respectively; a support block 307, fixedly mounted on the rear bottom side of the processing table 101; a rod holder 308, slidably mounted on the support block 307 in a back-and-forth direction; and a control block 309, fixedly mounted... At the rear end of the rod frame 308, inclined contact surfaces are provided on both the left and right sides; the connecting rod 310 is hinged at both ends to the front end of the rod frame 308 and the lower part of the mounting block 303 respectively; the third return spring 311 is sleeved on the outside of the rod frame 308, and its two ends are fixed to the support block 307 and the rod frame 308 respectively; two sets of support frames 312 are fixedly installed on the left and right sides below the rear of the processing table 101 respectively; the control arm 313 is slidably installed in each support frame 312 in the left and right direction, and one end of each control arm 313 is fixed to the movable seat 103 located on the rear side in different sets; the contact wheel 314 is rotatably installed on the other end of each control arm 313, so that each control arm 313 contacts the inclined contact surfaces on both sides of the control block 309 through the contact wheel 314, so that the control block 309 can be smoothly and stably transmitted and displaced.

[0038] Before placing the round tubes, the operator first abuts the ends of the two round tubes against the two positioning plates 305 respectively to achieve initial quick centering and pre-positioning; then, the support frame 105 is controlled to move down to clamp the round tubes, and the two sets of moving seats 103 are driven to move towards each other to make the two round tubes connect. During the movement of the circular tubes, the ends of the two circular tubes push the positioning plate 305 to move, compressing the second return spring 306. At the same time, the control arm 313, which moves synchronously with the moving seat 103, will press the inclined surfaces on both sides of the control block 309 through the contact wheel 314, causing the control block 309 to drive the rod 308 to move forward, compressing the third return spring 311. The forward movement of the rod 308 is then converted into the downward movement of the mounting block 303 through the connecting rod 310, compressing the third return spring 311. This causes the mounting block 303 and the positioning plate 305 to automatically descend and exit between the two circular tubes, that is, the positioning plate 305 actively avoids after completing the positioning function, so that the end faces of the two circular tubes can be accurately aligned with the preset welding position of the welding gun 001.

[0039] After welding is completed, the round tube is removed and the two sets of moving seats 103 are reset and separated. The first reset spring 304 pushes the mounting block 303 to reset upward, and at the same time works with the third reset spring 311 to push the rod frame 308 to reset backward to the initial state. The connecting rod 310 synchronously returns to its position, waiting for the next operation.

[0040] This support will enable rapid initial alignment of the round tube during loading via the positioning plate 305, and will automatically retract the positioning plate 305 before welding, ensuring accurate alignment of the round tube while avoiding obstruction of welding. In addition, through the triggering and resetting mechanism linked with the moving seat 103, it achieves accurate, reliable and automated positioning and avoidance actions, thereby improving the accuracy of welding alignment and the continuity of the overall operation process.

[0041] Combination Figure 1 , Figure 2 , Figure 9 and Figure 10 As shown, the bracket also includes: a second electric push rod 401, fixedly installed on the lower part of the fixed platform 102; a polisher 402, fixedly installed on the telescopic rod end of the second electric push rod 401, which moves in the front-back direction under the drive of the second electric push rod 401, and is used to grind and polish the weld that has been welded; a collection chamber 403, detachably fixedly installed under the processing table 101, and facing the opening in the center of the processing table 101, for receiving and collecting the debris generated during the polishing process; and a purifier 404, fixedly installed on the fixed platform 102, for absorbing the welding fumes generated during the welding process, with its air intake facing the welding work area, for absorbing and purifying the fumes generated during the welding process in real time.

[0042] The second electric push rod 401 is activated, driving the polisher 402 to move forward and contact the weld area. While the round tube is driven to rotate by the first roller 104, the polisher 402 can simultaneously grind and polish the circumferential weld, thereby improving the surface quality of the weld and the overall aesthetics of the round tube. The abrasive particles generated during the polishing process will fall through the opening in the center of the processing table 101 and be collected in the collection chamber 403 below for subsequent cleaning, keeping the work area clean. Throughout the welding and polishing process, the purifier 404 works continuously, sucking up and treating the fumes and dust generated during the operation to improve the operating environment of this support.

[0043] This bracket also integrates a polishing function, enabling the entire process from welding to surface treatment to be completed at the same workstation. This not only reduces the number of round tube turnover steps but also improves overall work efficiency. Furthermore, the configuration of the collection chamber 403 and the purifier 404 controls dust and smoke pollution, ensuring a clean working environment and the health and safety of personnel.

[0044] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A multi-functional welding support characterized by, The utility model relates to a welding machine, including: Processing table (101), fixed platform (102) are fixedly connected to the middle rear side of processing table (101), and welding torch (001) is fixed on fixed platform (102), mobile seat (103) is slidably connected to fixed platform (102) in left and right directions, and mobile seat (103) is equipped with two groups with two units as a group, and two groups of mobile seat (103) are symmetrically arranged on the left and right sides of processing table (101), first roller (104) is rotatably connected to each mobile seat (103), is used for supporting circular pipe, and can drive circular pipe to rotate around its axis under the drive, support frame (105) is vertically slidably arranged on the mobile seat (103) in the rear side of different groups, connecting block (106) is slidably connected to support frame (105) in front and back directions, and two connecting blocks (106) are arranged on each support frame (105), second roller (107) is rotatably connected to the lower part of each connecting block (106), support frame (105) can drive second roller (107) to cooperate with first roller (104) to clamp circular pipe under the drive, and two groups of mobile seat (103) can drive the circular pipe clamped to each other under the drive, the middle part of processing table (101) is provided with an opening, mounting bracket (301) is fixedly connected to the opening in the center of processing table (101), guide rod (302) is fixedly connected to mounting bracket (301), mounting block (303) is slidably connected to guide rod (302) in the vertical direction, and can be vertically lifted under the drive, and two positioning plates (305) are arranged on the left and right sides of mounting block (303) respectively.

2. The multi-functional welding support of claim 1, wherein, The support further includes: two positioning plates (305) and mounting block (303) are slidably connected, the support further includes: first reset spring (304) is sleeved on the outer portion of guide rod (302), and the two ends thereof are fixed to mounting block (303) and mounting bracket (301) respectively, second reset spring (306) is sleeved on the sliding shaft of each positioning plate (305), and the two ends thereof are fixed to positioning plate (305) and mounting block (303) respectively, support block (307) is fixedly connected to the bottom side of the rear portion of processing table (101), rod frame (308) is slidably connected to support block (307) in the front and back directions, control block (309) is fixedly connected to the rear end portion of rod frame (308), and the left and right sides thereof are provided with inclined contact surfaces, connecting rod (310) is hingedly connected to the front end of rod frame (308) and the lower portion of mounting block (303) respectively, third reset spring (311) is sleeved on the outer portion of rod frame (308), and the two ends thereof are fixed to support block (307) and rod frame (308) respectively, two groups of support frames (312) are fixedly connected to the left and right sides below the rear portion of processing table (101), control arm (313) is slidably connected to each support frame (312) in the left and right directions, one end of each control arm (313) is fixed to the mobile seat (103) in the rear side of different groups, and the other end cooperates with the inclined contact surfaces on the two sides of control block (309).

3. The multi-functional welding support of claim 2, wherein, The support further comprises: a first electric push rod (201) fixedly connected to the moving seat (103) at the rear side in different groups, with the telescopic end fixedly connected to the support frame (105), for driving the support frame (105) to vertically lift.

4. The multi-functional welding support of claim 3, wherein, The support further comprises: two first adjusting screw rods (202) rotatably connected in the processing table (101), with opposite screw threads at the two ends, and the screw threads on the two sides of the two first adjusting screw rods (202) threadedly matched with the two moving seats (103) at the same side in different groups respectively; a first motor (203) fixedly connected in the processing table (101), with the output end coaxially fixed to one of the first adjusting screw rods (202); and a first synchronous belt set (204) arranged between the two first adjusting screw rods (202) to synchronously rotate the two first adjusting screw rods (202).

5. The multi-functional welding support of claim 4, wherein, The support further comprises: a second adjusting screw rod (205) rotatably connected to each support frame (105), with opposite screw threads at the two ends, and the screw threads on the two sides threadedly matched with the two connecting blocks (106) on the corresponding support frame (105); and a second motor (206) fixedly connected to each support frame (105), with the output end coaxially fixed to the corresponding second adjusting screw rod (205).

6. The multi-functional welding support of claim 5, wherein, The support further comprises: two spline shafts (207) rotatably connected in the processing table (101), with the spline teeth of each spline shaft (207) spline-matched with the first rollers (104) on the two moving seats (103) at the same side in different groups respectively; a third motor (208) fixedly connected to the processing table (101), with the output end drivingly connected to one of the spline shafts (207); and a second synchronous belt set (209) arranged between the two spline shafts (207) to synchronously rotate the two spline shafts (207).

7. The multi-functional welding support of claim 6, wherein, The support further comprises: a second electric push rod (401) fixedly connected to the fixed table (102); a polisher (402) fixedly connected to the telescopic rod end of the second electric push rod (401), moving along the front and back directions under the driving of the second electric push rod (401), for polishing the welded seams after welding; and a collection bin (403) detachably fixedly connected below the processing table (101) and opposite to the opening position in the center of the processing table (101), for collecting the debris generated in the polishing process.

8. The multi-functional welding support of claim 7, wherein, The support further comprises: a purifier (404) fixedly connected to the fixed table (102), with the suction port facing the welding operation area, for absorbing the welding fume generated in the welding process.

9. The multi-functional welding support of claim 8, wherein, The support further comprises: a rolling ball (108) embeddedly movably connected to the left and right sides of the processing table (101), for assisting in supporting the circular pipe.

10. The multi-functional welding support of claim 9, wherein, The support further comprises: a contact wheel (314) rotatably connected to the other end of each control arm (313), so that each control arm (313) is in contact with the two inclined contact surfaces on the two sides of the control block (309) through the contact wheel (314).

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