Low deformation high precision joint welding machine

Abstract

This invention discloses a low-deformation, high-precision seam welding machine, comprising two workpieces and two sets of clamping components for holding the two workpieces. A slide rail is provided between the two sets of clamping components, and the two sets of clamping components slide along the slide rail to change their clamping positions. A welding unit is mounted on the slide rail and slides along the slide rail. The welding unit includes a carriage that slides on the slide rail, a gap expansion structure for grinding the two workpieces, and a welding structure for welding the gap between the two workpieces. Compared with the prior art, the advantage of this invention is that the two sets of clamping components that can slide independently along the slide rail can move alternately and always maintain at least one set of clamping components when welding long workpieces, effectively preventing overall displacement or local warping of the workpieces during adjustment or welding. The clamping components are designed with outer clamping blocks and inner clamping blocks, which can push and fit the two workpieces together from the side and apply pressure from above to ensure that the lower surfaces of the two workpieces are flush and to ensure accuracy.

Description

Technical Field

[0001] This invention relates to the field of welding structure technology, and in particular to a low-deformation, high-precision joint welding machine. Background Technology

[0002] A welding machine is an industrial device that uses heat, pressure, or a combination of both to bond two or more separate workpieces together at the joint, thus forming a single unit.

[0003] CN115945768B, entitled "A Welding Actuator and a Track-Type Welding Robot," points out that existing welding robots have a small working range, poor movement flexibility, are inconvenient to carry and install, and are not easy to quickly adjust the robot's posture and the welding torch's attitude. CN207205521U, entitled "An Automatic Welding Wire Feeder," proposes an automatic wire feeding mechanism during the welding process.

[0004] Currently, when welding two sheet-like workpieces together, the two workpieces need to be spliced ​​together, and then the seam is welded. During the welding process, the positions of the two workpieces need to be kept fixed to avoid deviation. In addition, if the edges of the two workpieces are not in contact and have a certain protrusion or depression, the two workpieces are not in a uniform contact state, which can easily lead to problems such as some parts being over-welded or some parts not being welded firmly.

[0005] When welding continuous sheet-like workpieces, it is necessary to fix different positions of the continuous sheet-like workpieces to avoid deviations in the welding position. However, it is difficult to move the fixed sheet-like workpieces accurately along the gap when welding manually. Even if it can move accurately along the gap, the unevenness of the gap and the fact that some positions are in contact with each other and some positions are not in contact with each other can easily cause the welding position to move in a tortuous direction instead of a straight line, making it even more difficult to control accurately. Summary of the Invention

[0006] In response to the problems mentioned above, this invention provides a low-deformation, high-precision seam welding machine.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a low-deformation high-precision seam welding machine, including two workpieces, including two sets of clamping components for clamping the two workpieces, a slide rail between the two sets of clamping components, and the two sets of clamping components sliding along the slide rail to change the clamping position; A welding unit that slides along the slide rail is installed on the slide rail. The welding unit includes a slide frame that slides on the slide rail, a gap expansion structure for grinding two workpieces, and a welding structure for welding the gap between the two workpieces. The gap expansion structure and the welding structure are both installed on the slide frame and are in the same straight line. The welding structure is used to weld the gap expanded by the gap expansion structure. The slide rail has at least two rails, one of which has a corrugated groove extending along the axis of the slide rail on its outer side. The welding unit includes a welding torch, an operating part one, and an operating part two. The operating part two is used to clamp the welding torch. The operating part one cooperates with the corrugated groove. When the welding structure moves along the corrugated groove, the operating part one reciprocates, causing the operating part two to move in a corrugated line.

[0008] A further preferred embodiment of the present invention is: the clamping component includes an outer clamping block located outside the two workpieces and abutting against the workpieces, an inner clamping block is embedded at the upper end of the outer clamping block, and a bolt threadedly connected to the outer clamping block passes through the inner clamping block, and the inner clamping block is used to control the workpiece to be pressed downward by rotating the bolt. The outer clamping blocks on both sides are transversely connected to limit rod one and limit rod two. Limit rod two has threads on its outer wall near both ends. Threaded sleeves are threaded to the two ends of limit rod two. Rotating the threaded sleeves is used to drive the outer clamping blocks to squeeze against the outside of the workpiece. Fastening blocks are installed on the limit rod one of both sets of clamping components. The two ends of the slide rail are respectively sleeved with the fastening blocks on both sides, so that the two sets of clamping components slide along the slide rail to change the clamping position.

[0009] A further preferred embodiment of the present invention is: the limiting rod has a rectangular cross-section, and the outer clamping blocks on both sides are aligned with the limiting rod at the position through which the limiting rod passes, thereby limiting the outer clamping blocks on both sides; The fastening block engages with the limiting rod, and the fastening block has bolts that press against the limiting rod. The position of the fastening block on the limiting rod can be changed by loosening the bolts.

[0010] A further preferred embodiment of the present invention is as follows: a frame is fixed on the carriage, and longitudinally extending sliding openings are provided on both sides of the frame. The gap expansion structure includes two sets of adjusting blocks that are slidably disposed in the sliding openings on both sides. A frame is integrally formed between the two sets of adjusting blocks. A grinding wheel for grinding the gap between the two workpieces is rotatably installed in the frame. A servo motor for driving the grinding wheel to rotate is installed on the outside of one set of adjusting blocks. An adjusting bolt is provided through and threaded on the other set of adjusting blocks. The lower end of the adjusting bolt is rotatably connected to the carriage. Rotating the adjusting bolt is used to control the up and down position of the grinding wheel.

[0011] A further preferred embodiment of the present invention is that the gap expansion structure further includes an air blowing pipe fixed on the slide and extending downward through the slide, with the lower end of the air blowing pipe inclined toward the grinding wheel.

[0012] A further preferred embodiment of the present invention is as follows: a frame two is fixed on the slide, and the frame two has upward through-slide openings on both sides. The operating part one includes a sheet metal block one and a sheet metal block two that are slidably installed in the two slide openings on both sides. The sheet metal block one is downward through-slide and threadedly connected to an adjusting bolt two. The adjusting bolt two is rotatably connected to the slide and is used to adjust the up and down position of the operating part one.

[0013] A further preferred embodiment of the present invention is: the operating part one further includes a tube shaft fixed between the sheet metal block one and the sheet metal block two. The tube shaft is hollow inside and one end of it passes through the sheet metal block two and communicates with the outside. A control shaft is sleeved inside the end of the tube shaft that passes outward. The part of the control shaft located on the outside is bent downward, and a control bolt is threaded to the bent end. The control bolt abuts against the wave groove. A control port is provided at the upper end of the tube shaft. Two sets of clamping plates extending from the control port are fixed outside the control shaft. The clamping plates are used to hold the second operating part and control the second operating part to swing back and forth. The section of the control shaft located inside the tube shaft has a larger diameter than the section extending outwards, and the section with the larger diameter fits against the inner wall of the tube shaft. The section with the smaller diameter of the control shaft is fitted with a support spring. The outer side of the sheet metal block is connected to a fastening cap with a thread. The fastening cap is fitted with the control shaft and abuts against the support spring, so that the control bolt remains against the wave groove.

[0014] A further preferred embodiment of the present invention is as follows: a tube body is fixedly fitted onto a tube shaft, a control port is inserted through the tube body with the control port facing upwards, an L-shaped shaft is fixed to the upper end of the tube body, an inner rotating tube with a concave surface is fitted onto the transverse part of the L-shaped shaft, and a nut that is pressed against the inner rotating tube is threaded to the end of the transverse part of the L-shaped shaft. The second operating part is sleeved on the inner rotating tube and slides back and forth along the inner rotating tube.

[0015] A further preferred embodiment of the present invention is: the second operating part includes an outer rotating tube sleeved outside the inner rotating tube and a clamping tube fixed to the outer rotating tube, the clamping tube being used to clamp the welding torch; The inner wall of the outer tube has protrusions that are embedded in the recess of the inner tube. The two work together to clamp the outside of the tube, which has a through gap and is elastic.

[0016] A further preferred embodiment of the present invention is: a wire feeder is fixed on the welding torch for fixing the wire feeding structure.

[0017] Compared with the prior art, the advantages of the present invention are as follows: 1. Two sets of clamping components that can slide independently along the slide rail can move alternately and always keep at least one set of clamping components when welding long workpieces, effectively preventing the workpiece from shifting as a whole or warping locally during adjustment or welding. The clamping components are designed with outer clamping blocks and inner clamping blocks, which can push the two workpieces together from the side and apply pressure from above to ensure that the lower surfaces of the two workpieces are flush and to ensure accuracy.

[0018] 2. The gap expansion structure and the welding structure are located on the same carriage and can move precisely along the same slide rail. The welding position is treated by the gap expansion structure, ensuring that the welding path is aligned with the gap of the workpiece after the gap expansion structure is treated. The grinding wheel pre-grooves the weld in a U-shape or V-shape, which can eliminate the "controllable unevenness" of the workpiece edge, making the gap width and shape relatively consistent. The bevel formed by grinding is conducive to the welding torch penetrating deeper, ensuring that the root of the weld is fully penetrated and achieving full thickness fusion of the workpiece.

[0019] 3. The automatic S-shaped oscillation of the welding torch allows for precise and stable lateral reciprocating motion as the carriage travels in a straight line. This oscillation ensures that the arc heat is evenly distributed on both sides of the weld, preventing overheating in the center and reducing welding stress and deformation. Furthermore, the weld being welded has been treated with a gap expansion structure, resulting in a relatively straight weld with consistent depth and shape at different locations. This allows for control of the molten pool width and depth, achieving good filling of large bevels and producing a smooth and aesthetically pleasing weld. It replaces the complex manual oscillation operation of the welder, reducing reliance on human eyesight and skill, and improving welding quality. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the clamping component structure of the present invention; Figure 3 This is a partially exploded structural diagram of the clamping component of the present invention; Figure 4 This is a schematic diagram of the structure of the clamping component of the present invention when it moves; Figure 5 This is a schematic diagram of the welding unit structure of the present invention; Figure 6 This is a schematic diagram of the other side of the welding unit of the present invention; Figure 7 This is a partial exploded view of the gap expansion structure of the present invention; Figure 8 This is a partial exploded view of the welded structure of the present invention; Figure 9 This is a schematic diagram of the structure of the operating part of the present invention; Figure 10 This is a schematic diagram of the structure of the first and second operation parts of the present invention; Figure 11 This is a schematic diagram of a partial cross-sectional structure of the tube shaft of the present invention.

[0022] In the diagram: 1. Workpiece; 2. Clamping components; 21. Outer clamping block; 22. Inner clamping block; 23. Limiting rod one; 24. Limiting rod two; 25. Threaded sleeve; 26. Fastening block; 3. Slide rail; 31. Corrugated groove; 4. Welding unit; 41. Carriage; 42. Frame one; 421. Slide opening one; 43. Frame two; 431. Slide opening two; 5. Gap expansion structure; 51. Adjusting block; 52. Adjusting bolt one; 53. Frame body; 54. Servo motor; 55. Grinding wheel; 56. Air blowing pipe 6. Welding structure; 61. Welding torch; 611. Wire feeder; 62. Operating section one; 621. Sheet metal block one; 622. Adjusting bolt two; 623. Sheet metal block two; 624. Tube shaft; 625. Control port; 626. Control shaft; 627. Clamping plate; 628. Control bolt; 629. Tube body; 601. L-shaped shaft; 602. Inner rotating tube; 603. Nut; 604. Support spring; 605. Fastening cap; 63. Operating section two; 631. Outer rotating tube; 632. Clamping tube. Detailed Implementation

[0023] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0025] This embodiment mainly describes a low-deformation, high-precision seam welding machine. Please refer to [link / reference]. Figures 1-11Specifically, when welding two sheet-like workpieces 1, it is necessary to keep the positions of the two workpieces 1 fixed. When the lengths of the two workpieces 1 are relatively long, it is also necessary to limit the different positions of the workpieces 1. When the edges of the two workpieces 1 are spliced ​​have a certain degree of concavity and convexity, it should be noted that the undulations here are controllable concavity and convexity. During welding, it is easy to cause local areas to be thoroughly welded while local areas are not firmly welded, affecting the quality. In addition, when the gap between the two workpieces 1 is not a straight line, it should be noted that its extension direction is controllable. At the same time, the concavity and convexity of the gap will cause local areas to fit and local areas to not fit, increasing the difficulty of welding. Based on this, a low-deformation high-precision seam welding machine is proposed, including two existing sheet-like workpieces 1 with a long extension length. When picked up, the long extension will cause it to bend. During welding, it needs to be placed on the welding table. It includes two sets of clamping parts 2 for clamping the two workpieces 1. A slide rail 3 is provided between the two sets of clamping parts 2. The two sets of clamping parts 2 slide along the slide rail 3 to change the clamping position. A welding unit 4 that slides along the slide rail 3 is installed on the slide rail 3. The welding unit 4 includes a slide frame 41 that slides on the slide rail 3, a gap expansion structure 5 for grinding two workpieces 1, and a welding structure 6 for welding the gap between the two workpieces 1. The gap expansion structure 5 and the welding structure 6 are both installed on the slide frame 41 and are in the same straight line. The welding structure 6 is used to weld the gap expanded by the gap expansion structure 5. The slide rail 3 has at least two tracks, one of which has a corrugated groove 31 extending along the axis of the slide rail 3 on its outer side. The welding unit 4 includes a welding torch 61, an operating part 62 and an operating part 63. The operating part 63 is used to clamp the welding torch 61. The operating part 62 cooperates with the corrugated groove 31. When the welding structure 6 moves along the corrugated groove 31, the operating part 62 reciprocates, causing the operating part 63 to move in a corrugated line.

[0026] Specifically, the two sets of clamping components 2, as shown Figure 4As shown, the position of the clamping component 2 can be changed by loosening and moving along the slide rail 3. The two sets move one in front and one behind, ensuring that there is always one set of clamping components 2 clamping the two workpieces 1 during the movement, so as not to cause a large deviation between the two workpieces 1, thus ensuring accuracy. The welding unit 4 slides along the slide rail 3 to process the weld. The gap expansion structure 5 and the welding structure 6 are installed on the slide 41. Therefore, the gap after grinding by the gap expansion structure 5 can be accurately welded by the welding structure 6, improving the welding quality. At the same time, the operation can be carried out by simply moving the slide 41. It should be noted that the gap can be expanded by the gap expansion structure 5 first and then welded by the welding structure 6. Such operation requires controlling the slide 41 to move back and forth twice. By controlling the gap expansion structure 5 and the welding structure 6 to move synchronously, only the slide 41 needs to be controlled to slide once. In addition, the first operating part 62 cooperates with the corrugated groove 31 of the slide rail 3, so that the first operating part 62 can slide along the shape of the corrugated groove 31 to achieve S-shaped movement. It can control the width and depth of the molten pool, making it wider and shallower, and can perform large bevel filling and obtain a beautiful weld surface. The second operating part 63 is used to connect the welding torch 61 and the first operating part 62. The second operating part 63 can adjust the extension length and tilt angle of the welding torch 61.

[0027] like Figures 1-4 The structure of each part of the clamping component 2 is shown. The clamping component 2 includes an outer clamping block 21 located outside the two workpieces 1 and abutting against the workpieces 1. An inner clamping block 22 is embedded in the upper end of the outer clamping block 21. A bolt threadedly connected to the outer clamping block 21 passes through the inner clamping block 22. The inner clamping block 22 is used to control the inner clamping block 22 to press the workpiece 1 downward by rotating the bolt. The outer clamping blocks 21 on both sides are transversely connected to the first limiting rod 23 and the second limiting rod 24. The outer wall of the second limiting rod 24 near both ends has threads. The second limiting rod 24 is threaded with threaded sleeves 25 near both ends. Rotating the threaded sleeves 25 is used to drive the outer clamping blocks 21 to squeeze against the outside of the workpiece 1. The first limiting rod 23 of both sets of clamping components 2 is equipped with fastening blocks 26. The two ends of the slide rail 3 are respectively sleeved with the fastening blocks 26 on both sides, so that the two sets of clamping components 2 slide along the slide rail 3 to change the clamping position.

[0028] Specifically, both workpieces 1 have outer clamping blocks 21 on their outer sides. The outer clamping blocks 21 on both sides are used to push the two workpieces 1 relative to each other, which is controlled by the threaded sleeve 25. Then, the inner clamping blocks 22 push the workpieces 1 downwards, so that the lower end faces of the two workpieces 1 are flush. Under the action of the gap expansion structure 5, the gap on the upper side of the two workpieces 1 is processed and welded, and the weld position is avoided from being directly observed on the lower side as much as possible. At the same time, the position of the workpieces 1 is kept as stable as possible after grinding and welding and clamping by the clamping components 2, thus improving accuracy. The slide rail 3 acts as a guide, allowing the clamping components 2 to change the clamping position along the slide rail 3.

[0029] like Figure 3 As shown, the limiting rod 23 has a rectangular cross-section. The outer clamping blocks 21 on both sides are connected to the limiting rod 23 at the position through which the limiting rod 23 passes, thus limiting the outer clamping blocks 21 on both sides. The fastening block 26 is engaged with the limiting rod 23, and the fastening block 26 has bolts that press against the limiting rod 23. The position of the fastening block 26 on the limiting rod 23 can be changed by loosening the bolts.

[0030] Specifically, the rectangular design of the limiting rod 23 prevents rotation and keeps the fastening block 26 relatively horizontal. It should be noted that the fastening block 26 can change its fixed position along the limiting rod 23. A fastening block 26 can also be installed on the limiting rod 24 to engage the slide rail 3, preventing positional shift of the slide rail 3. For ease of adjustment of the slide rail 3, only the limiting rod 23 in the diagram has a fastening block 26; however, adjustments can be made by the operator based on actual conditions. It should also be noted that when the slide 41 slides along the slide rail 3, both ends of the slide rail 3 are engaged with the fastening block 26, preventing the slide rail 3 from moving along with it.

[0031] like Figures 5-7 As shown, a frame 42 is fixed on the slide 41. Both sides of the frame 42 are provided with longitudinally extending sliding openings 421. The gap expansion structure 5 includes two sets of adjusting blocks 51 that are slidably disposed in the sliding openings 421 on both sides. A frame 53 is integrally formed between the two sets of adjusting blocks 51. A grinding wheel 55 for grinding the gap between the two workpieces 1 is rotatably installed in the frame 53. A servo motor 54 for driving the grinding wheel 55 to rotate is installed on the outside of one set of adjusting blocks 51. An adjusting bolt 52 is threaded through and connected to the other set of adjusting blocks 51. The lower end of the adjusting bolt 52 is rotatably connected to the slide 41. Rotating the adjusting bolt 52 is used to control the up and down position of the grinding wheel 55.

[0032] Specifically, the adjusting blocks 51 on both sides and the frame 53 located in the frame 42 form a frame structure. The adjusting bolt 52 can be rotated to control its rotation and vertical movement, so as to control the vertical adjustment position of the grinding wheel 55 and control its grinding depth. The servo motor 54 is an existing structure and is controlled by an existing controller to realize the rotation of the grinding wheel 55. When the carriage 41 slides along the slide rail 3, grinding can be carried out in the gap between the two workpieces 1, so that the gap forms a U-shape or V-shape. The U-shape or V-shape can be determined according to the shape of the grinding wheel 55.

[0033] like Figure 7 As shown, the gap expansion structure 5 also includes an air pipe 56 fixed on the carriage 41 and extending downward through the carriage 41. The lower end of the air pipe 56 is inclined toward the grinding wheel 55. The air pipe 56 is connected to an existing air compressor to carry away the generated debris. Even if the workpiece 1 is contaminated by oil stains or other liquids, it can be cleaned to a certain extent.

[0034] like Figures 8-11 As shown, a frame 43 is fixed on the slide 41. The frame 43 has upward through-slide openings 431 on both sides. The operating part 62 includes a sheet metal block 621 and a sheet metal block 623 that are slidably installed in the two slide openings 431 on both sides. The sheet metal block 621 is downward through-slide and threaded with an adjusting bolt 622. The adjusting bolt 622 is rotatably connected to the slide 41 and is used to adjust the up and down position of the operating part 62.

[0035] Specifically, frame 2 43 serves as a supporting component. The height of sheet metal block 1 621 and sheet metal block 2 623 can be adjusted by manually rotating the adjusting bolt 2 622, so that the position of welding torch 61 can be adjusted to maintain a suitable distance from the gap. It should be noted that sheet metal block 1 621 and sheet metal block 2 623 are connected by tube shaft 624. At the same time, sheet metal block 1 621 and sheet metal block 2 623 are restricted by sliding ports 2 431 on both sides. Therefore, when manually controlling the adjusting bolt 2 622, it is necessary to ensure that it is in a stable state.

[0036] like Figures 8-11 As shown, the operation unit 62 also includes a tube shaft 624 fixed between sheet metal block 621 and sheet metal block 623. The tube shaft 624 is hollow inside and one end of it passes through sheet metal block 623 and communicates with the outside. A control shaft 626 is sleeved inside the end of the tube shaft 624 that passes outward. The part of the control shaft 626 located on the outside is bent downward, and a control bolt 628 is threaded to the bent end. The control bolt 628 abuts against the wave groove 31. A control port 625 is provided at the upper end of the tube shaft 624. Two sets of clamping pieces 627 extending from the control port 625 are fixed to the outside of the control shaft 626. The clamping pieces 627 are used to clamp the second operating part 63 and control the second operating part 63 to swing back and forth. The diameter of the section of the control shaft 626 located inside the tube shaft 624 is larger than that of the section extending outward, and the section with the larger diameter fits against the inner wall of the tube shaft 624. The section of the control shaft 626 with the smaller diameter is fitted with a support spring 604. The outer side of the sheet metal block 623 is threaded with a fastening cap 605. The fastening cap 605 is fitted with the control shaft 626 and abuts against the support spring 604, so that the control bolt 628 is kept abutting against the wave groove 31.

[0037] Specifically, the control shaft 626 is supported by a control bolt 628 and a support spring 604, allowing it to slide along the wave groove 31 and reciprocate as the slide 41 moves. The outer rotating tube 631 is held by a clamping plate 627, thus also reciprocating and causing the welding torch 61 to move in an S-shape. It should be noted that the fastening cap 605 compresses the support spring 604, keeping it in a compressed state. After the control bolt 628 is removed or rotated a certain distance, the outer rotating tube 631 is held by the clamping plate 627 and its position remains unchanged under the action of the support spring 604. When the welding torch 61 needs to move linearly, it can be controlled by removing or rotating the control bolt 628 a certain distance. It should also be noted that after the control bolt 628 is removed or rotated a certain distance, the clamping plate 627 will abut against the edge of the control port 625, limiting the position of the clamping plate 627.

[0038] like Figure 10 As shown, a tube body 629 is fixedly fitted onto a tube shaft 624, and a control port 625 extends upward through the tube body 629. An L-shaped shaft 601 is fixed to the upper end of the tube body 629. An inner rotating tube 602 with a recessed surface is fitted onto the transverse part of the L-shaped shaft 601, and a nut 603 that is pressed against the inner rotating tube 602 is threaded to the end of the transverse part of the L-shaped shaft 601. The second operating part 63 is sleeved on the inner rotating tube 602 and slides back and forth along the inner rotating tube 602.

[0039] The tilt angle of the welding torch 61 can be adjusted by loosening or rotating the nut 603. At the same time, the inner rotating tube 602 can be removed by loosening the nut 603.

[0040] Operation section 2 63 includes an outer rotating tube 631 sleeved outside the inner rotating tube 602 and a clamping tube 632 fixed to the outer rotating tube 631. The clamping tube 632 is used to clamp the welding torch 61. The inner wall of the outer tube 631 has a protrusion that is embedded in the recess of the inner tube 602. The two work together to clamp the tube 632 with a through gap, and the tube is elastic.

[0041] The inner wall of the outer rotating tube 631 has a protrusion embedded in the recess of the inner rotating tube 602. Therefore, when the inner rotating tube 602 is rotated and adjusted, the angle of the welding torch 61 can be adjusted. Since the clamping tube 632 is elastic, the welding torch 61 can be manually adjusted to adjust its clamping position and the distance between the welding torch 61 and the gap.

[0042] A wire feeder 611 is fixed on the welding torch 61 to secure the wire feeding structure. The wire feeder 611 can rotate and be adjusted to different angles. It should be noted that the wire feeding structure is an existing technology.

[0043] Working principle: Two workpieces 1 to be welded are aligned and placed. The threaded sleeve 25 is manually rotated to bring the outer clamping blocks 21 on both sides closer together, fitting the weld seams of the two aligned workpieces 1 together. Then, the bolt is rotated to make the inner clamping block 22 press down on the corresponding workpiece 1. Finally, the outer clamping block 21 and inner clamping block 22 are further tightened to limit the position of the two workpieces 1. The two sets of clamping components 2 can move along the slide rail 3 to change the clamping position, such as... Figure 4 As shown, after one set of clamping components 2 moves, another set moves, so that the welding position can be changed. It should be noted that there is friction between the outer clamping block 21 and the limiting rod 23. When the welding unit 4 moves, the limiting rod 23 is not easy to deviate.

[0044] The fastening block 26 and the limiting rod 23, which can slide along the outer clamping block 21, allow the fastening block 26 to be adjusted in position, aligning the fastening block 26, the slide rail 3, and the welding unit 4 with the gap between the two workpieces 1. The welding unit 4 slides along the slide rail 3 to complete the welding of the gap. The specific process is as follows: Firstly, such as Figure 7 As shown, manually rotating the adjusting bolt 52 controls the vertical position of the grinding wheel 55. Under the control of the existing controller, the servo motor 54 is driven to work, causing the grinding wheel 55 to grind downwards into the gap between the two workpieces 1, making the gap cross-section present a U-shaped or V-shaped structure. This allows the protruding or recessed positions of the workpiece 1 to be ground relative to each other. Since the grinding wheel 55 moves along the slide rail 3, the ground gap is basically a straight line, reducing protruding or recessed positions. During welding, it only needs to move in a straight line along the slide rail 3, which facilitates welding and allows it to penetrate deep into the workpiece 1 to ensure root penetration and fusion of the entire thickness. It should be noted that the depth of the grinding wheel 55 can be adjusted to ensure the weld has a certain depth while avoiding direct penetration.

[0045] Secondly, the outer end of the air blowing pipe 56 is connected to an existing external air compressor, so that the air blowing pipe 56 blows the gas at an angle toward the grinding wheel 55, blowing away the debris in the gap and also blowing away the debris on the grinding wheel 55. It should be noted that after the gap between the two workpieces 1 is deepened, it is in a newly opened state. After the generated debris is blown away, the gap is in a clean state, which can avoid the adverse effects of oil or impurities on the welding process to a certain extent.

[0046] Thirdly, an existing wire feeding device is installed on the outside of the wire feeder 611 to convey the welding wire to the vicinity of the welding torch 61. It should be noted that the wire feeding device can be controlled by the existing controller to control the switch and the transmission speed. It should be noted that the welding torch 61 is an argon arc welding torch. The argon arc welding torch needs to maintain a certain gap from the workpiece 1 and also needs to maintain a certain tilt angle. When the argon arc welding torch is welding, the S-shaped oscillation can make the arc move back and forth on both sides of the weld, avoiding excessive heat concentration in the center of the weld. It can control the width and depth of the molten pool, making it wider or shallower, achieving large bevel filling and obtaining a beautiful weld surface. However, manual control is difficult to maintain a stable S-shaped movement and is prone to deviation. Even if it can move along the S-shape, it requires the operator to focus their eyes intently on the welding position. The strong light generated at the welding position can cause eye problems for the operator. Based on this, an operating unit 62, an operating unit 63, and a slide 41 are designed to move along the slide rail 3. The outer side of the slide rail 3 has a wave groove 31. The operating unit 62 engages with the wave groove 31, enabling the operating unit 62 to reciprocate. The operating unit 62 moves along the slide rail 3 while reciprocating to achieve an S-shaped movement, replacing manual operation. At the same time, the operator can focus their eyes on the movement of the slide 41 instead of the welding position. It should be noted that the gap between the two workpieces 1 after grinding can be basically covered by the S-shaped movement of the welding torch 61.

[0047] Fourth, since the position of the slide rail 3 can be adjusted, the position of the control bolt 628 can also be rotated and adjusted. Therefore, when the welding torch 61 needs to move linearly, the control bolt 628 can be rotated to not contact the wave groove 31, so that the welding torch 61 can move between. It should be noted that by loosening the inner rotating tube 602 and rotating it to adjust its orientation by using the nut 603, the orientation of the outer rotating tube 631 will also rotate. It should be noted that the outer rotating tube 631 and the inner rotating tube 602 have a certain frictional effect. When there is no external force, the position of the outer rotating tube 631 will not change along the inner rotating tube 602. After the welding torch 61 is clamped by the clamping tube 632, the position of the welding torch 61 can be adjusted.

[0048] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0049] The low-deformation, high-precision seam welding machine provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the present invention and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A low-deformation, high-precision seam welding machine, characterized in that, It includes two sets of clamping components for clamping two workpieces, with a slide rail between the two sets of clamping components, and the two sets of clamping components slide along the slide rail to change the clamping position; A welding unit that slides along the slide rail is installed on the slide rail. The welding unit includes a slide frame that slides on the slide rail, a gap expansion structure for grinding two workpieces, and a welding structure for welding the gap between the two workpieces. The gap expansion structure and the welding structure are both installed on the slide frame and are in the same straight line. The welding structure is used to weld the gap expanded by the gap expansion structure. The slide rail has at least two rails, one of which has a corrugated groove extending along the axis of the slide rail on its outer side. The welding unit includes a welding torch, an operating part one and an operating part two. The operating part two is used to clamp the welding torch. The operating part one cooperates with the corrugated groove. When the welding structure moves along the corrugated groove, the operating part one reciprocates, causing the operating part two to move in a wavy line. A frame 2 is fixed on the slide, and two upward through-slide openings 2 are opened on both sides of the frame 2. The operating part 1 includes a sheet metal block 1 and a sheet metal block 2 that are slidably installed in the two slide openings 2 on both sides. The sheet metal block 1 is downward through-slide and threaded with an adjusting bolt 2. The adjusting bolt 2 is rotatably connected to the slide and is used to adjust the up and down position of the operating part 1. The operating unit also includes a tube shaft fixed between sheet metal block 1 and sheet metal block 2. The tube shaft is hollow inside and one end of it passes through sheet metal block 2 and communicates with the outside. A control shaft is sleeved inside the end of the tube shaft that passes outward. The part of the control shaft located on the outside is bent downward, and a control bolt is threaded to the bent end. The control bolt abuts against the wave groove. A control port is provided at the upper end of the tube shaft. Two sets of clamping plates extending from the control port are fixed outside the control shaft. The clamping plates are used to hold the second operating part and control the second operating part to swing back and forth. The section of the control shaft located inside the tube shaft has a larger diameter than the section extending outwards, and the section with the larger diameter fits against the inner wall of the tube shaft. The section with the smaller diameter of the control shaft is fitted with a support spring. The outer side of the sheet metal block is connected to a fastening cap, which is fitted with the control shaft and abuts against the support spring, so that the control bolt remains against the wave groove. The tube body is fixedly connected to the outer sleeve of the tube shaft, and the control port is inserted through the tube body with the upper end facing upward. An L-shaped shaft is fixed to the upper end of the tube body. An inner rotating tube with a concave surface is sleeved on the transverse part of the L-shaped shaft. A nut that is pressed against the inner rotating tube is threaded to the end of the transverse part of the L-shaped shaft. The second operating part is sleeved on the inner rotating tube and slides back and forth along the inner rotating tube; Operating section 2 includes an outer rotating tube sleeved outside the inner rotating tube and a clamping tube fixed to the outer rotating tube. The clamping tube is used to clamp the welding torch. The inner wall of the outer tube has protrusions that are embedded in the recess of the inner tube. The two work together to clamp the outside of the tube, which has a through gap and is elastic.

2. The low-deformation, high-precision seam welding machine according to claim 1, characterized in that, The clamping component includes an outer clamping block located outside the two workpieces and abutting against the workpieces. An inner clamping block is embedded at the upper end of the outer clamping block. A bolt threaded through the inner clamping block and connected to the outer clamping block is threaded through the inner clamping block. Rotating the bolt controls the inner clamping block to press the workpiece downward. The outer clamping blocks on both sides are transversely connected to limit rod one and limit rod two. Limit rod two has threads on its outer wall near both ends. Threaded sleeves are threaded to the two ends of limit rod two. Rotating the threaded sleeves is used to drive the outer clamping blocks to squeeze against the outside of the workpiece. Fastening blocks are installed on the limit rod one of both sets of clamping components. The two ends of the slide rail are respectively sleeved with the fastening blocks on both sides, so that the two sets of clamping components slide along the slide rail to change the clamping position.

3. The low-deformation, high-precision seam welding machine according to claim 2, characterized in that, The limiting rod has a rectangular cross-section, and the outer clamping blocks on both sides are aligned with the limiting rod at the point through which the limiting rod passes, thus limiting the outer clamping blocks on both sides. The fastening block engages with the limiting rod, and the fastening block has bolts that press against the limiting rod. The position of the fastening block on the limiting rod can be changed by loosening the bolts.

4. The low-deformation, high-precision seam welding machine according to claim 1, characterized in that, A frame is fixed on the carriage. Both sides of the frame are provided with longitudinally extending sliding openings. The gap expansion structure includes two sets of adjusting blocks that are slidably disposed in the sliding openings on both sides. A frame is integrally formed between the two sets of adjusting blocks. A grinding wheel for grinding the gap between the two workpieces is rotatably installed inside the frame. A servo motor for driving the grinding wheel to rotate is installed on the outside of one set of adjusting blocks. An adjusting bolt is provided on the other set of adjusting blocks that is threaded through. The lower end of the adjusting bolt is rotatably connected to the carriage. Rotating the adjusting bolt is used to control the up and down position of the grinding wheel.

5. The low-deformation, high-precision seam welding machine according to claim 4, characterized in that, The gap expansion structure also includes an air blowing pipe fixed to the carriage and extending downward through the carriage, with the lower end of the air blowing pipe inclined toward the grinding wheel.

6. The low-deformation, high-precision seam welding machine according to claim 1, characterized in that, A wire feeder is fixed on the welding torch to secure the wire feeding structure.

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