A flip-over multi-axis narrow gap welding station and welding method

Abstract

A flip-type multi-axis narrow-gap welding workstation and welding method, belonging to the field of welding technology, includes a flip-type base with a clamping mechanism rotatably mounted on it. The clamping mechanism includes a support platform, with a first clamping unit and a clamping base movably mounted at both ends of the support platform. Several second clamping units are movably mounted on both sides of the central axis along the length direction of the support platform, and two crossbeams are symmetrically fixed on both sides of the central axis along the length direction of the support platform. The crossbeams are located outside the second clamping units, and each crossbeam is equipped with a corresponding narrow-gap welding mechanism that moves along three axes. The multi-directional clamping units, in conjunction with the support platform, reliably clamp thick plate workpieces, flipping them from a flat welding posture to a vertical or near-vertical welding state. The molten pool formation is stable, and the use of a narrow-gap welding torch significantly reduces the amount of filler metal used in the weld, lowers the welding heat input, suppresses plate deformation and residual stress, and saves welding wire and welding time.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a flip-type multi-axis narrow gap welding workstation and welding method. Background Technology

[0002] Thick plate welding is a core processing step in the manufacturing of pressure vessels, heavy steel structures, wind power, and shipbuilding equipment. The objects processed are mostly metal plates with a thickness of 16mm or more. Thick plates have high overall rigidity, high welding restraint stress, and a wide heat conduction range during welding, resulting in significant temperature differences between the inside and outside of the plate, which easily leads to problems such as deformation and stress concentration.

[0003] Existing thick plate welding typically employs submerged arc welding, gas metal arc welding, tungsten inert gas welding, and narrow gap automated welding. Traditional beveling multi-layer multi-pass welding processes are highly versatile and better suited for flat welding of small and medium-sized workpieces. Submerged arc welding has high deposition efficiency and is often used for short and thick plate joints. Narrow gap welding is equipped with a dedicated flat water-cooled welding torch, which reduces the weld width, decreases filler metal consumption, and is suitable for welds with greater depth.

[0004] Traditional construction methods that combine large bevels with flat and horizontal welding result in a large amount of filler metal in the weld bevel. Continuous heat input exacerbates plate deformation, significantly increases residual stress, and increases the probability of cold cracking. This leads to higher material and labor costs. Under flat and horizontal welding postures, the molten pool is affected by gravity, preventing slag from rising smoothly and accumulating deep within the weld. This frequently results in interlayer slag inclusions and sidewall incomplete fusion defects, and is also detrimental to the formation of the molten pool. Summary of the Invention

[0005] To address the technical problems in existing thick plate welding, such as the need for large beveling, low production efficiency, high energy consumption of welding materials, difficulty in correcting post-weld deformation, and difficulty in forming a molten pool, which affect welding quality, this invention provides a flip-type multi-axis narrow gap welding workstation and welding method.

[0006] The technical solution of this invention is as follows: This invention provides a flip-type multi-axis narrow gap welding workstation, including a flip base, on which a clamping mechanism is rotatably mounted. The clamping mechanism includes a support platform, with a first clamping unit and a clamping base movably mounted at both ends of the support platform, and several second clamping units movably mounted on both sides of the central axis along the length direction of the support platform. Two crossbeams are symmetrically fixed on both sides of the central axis along the length direction of the support platform, with the crossbeams located outside the second clamping units. Each crossbeam is equipped with a narrow gap welding mechanism that moves along three axes. The workstation integrates a workpiece overall flipping structure with a dual-sided three-axis narrow-gap welding mechanism. Combined with a multi-directional clamping unit and a support platform, it reliably clamps the entire contour of thick plate workpieces. The workpiece does not slip or loosen during the entire flipping process. It can flip thick plate workpieces from a flat welding posture to a vertical or near-vertical welding state, eliminating the negative impact of gravity on the molten pool and slag during flat and horizontal welding. The molten pool is stable, and the use of narrow-gap welding torches significantly reduces the amount of filler metal used in the weld, reduces welding heat input, suppresses plate deformation and residual stress, reduces the probability of cold cracking, and saves welding wire and welding time. The dual crossbeams independently support the three-axis welding mechanism, and the two welding torches can weld simultaneously in parallel, resulting in high welding efficiency.

[0007] Preferably, a number of longitudinal beams are fixedly arranged at intervals along the length of the support platform. The two ends of the longitudinal beams extend outward along the width of the support platform. Each end of the longitudinal beam is respectively provided with a second clamping unit. The crossbeam is fixedly arranged on the longitudinal beam. The longitudinal beams are arranged in sections to provide independent installation points for the second clamping units. The multi-point clamping disperses the thermal deformation stress of the thick plate during welding, and the clamping force is uniform. In addition, the longitudinal beam serves as the installation reference for the crossbeam, which improves the overall rigidity of the crossbeam. The crossbeam is not easy to vibrate during welding operations, which ensures the stability of the welding torch travel trajectory.

[0008] Preferably, the clamping base has a rectangular structure, and the length of the clamping base is less than the length of the longitudinal beam. The clamping base is slidably connected to the support platform through the first slide rail slider assembly. The support platform and the clamping base are connected through the third drive assembly. The third drive assembly can drive the clamping base to slide along the length of the platform, adapt to the end positioning of thick plates of different lengths, and cooperate with the first clamping unit to complete the clamping of the workpiece in the length direction. The clamping adjustment range is wide and the workpiece is easy to install and remove.

[0009] Preferably, the longitudinal beam has a hollow structure, and the second clamping unit is slidably disposed inside the longitudinal beam. Two second clamping units on the same longitudinal beam are arranged opposite each other. The two second clamping units are respectively connected to the longitudinal beam through a fourth drive component. The hollow longitudinal beam has a built-in clamping unit, and the overall structure is compact and does not occupy the operating space on the platform surface. The pair of opposing second clamping units can clamp the plate from both sides, automatically correct the workpiece placement to be centered, and avoid workpiece displacement caused by clamping on one side.

[0010] Preferably, a second slide is slidably connected to the crossbeam, and a rack is fixedly provided on the crossbeam along its length. A drive motor is fixedly provided on the second slide, and the output end of the drive motor meshes with the rack through a gear. The narrow gap welding mechanism is movably installed on the second slide. The gear and rack drive the second slide to move along the length of the crossbeam. The transmission is smooth and the positioning accuracy is high. It can realize continuous and uniform welding of the welding torch along the length of the weld, ensuring that the weld depth and width of the entire weld are uniform.

[0011] Preferably, a first moving block is movably mounted on the second slide. The axis of the first moving block is perpendicular to the axis of the crossbeam. The first moving block moves horizontally in a direction away from or close to the central axis of the support platform. A second moving block is movably connected to one end of the first moving block near the central axis of the support platform in the length direction. The second moving block moves horizontally in a direction away from or close to the support platform surface. Both the first and second moving blocks are electrically driven. The narrow gap welding mechanism is fixedly mounted on the second moving block. The second slide realizes the feeding in the length direction of the weld seam. The first and second moving blocks complete the lateral advance and retreat of the welding torch so that the welding torch is close to the position to be welded. The combination of the three constitutes a three-axis motion system, which can match narrow gap weld seams of different depths and widths, and the position of the welding torch is flexibly adjustable.

[0012] Preferably, the narrow gap welding mechanism includes a first mounting plate fixedly mounted on a second moving block, a second mounting plate slidably connected to the first mounting plate, and a third mounting plate slidably connected to the second mounting plate. The moving direction of the second mounting plate is the same as the moving direction of the second moving block, and the moving direction of the third mounting plate is the same as the moving direction of the first moving block. A clamping assembly is provided between the first mounting plate and the second mounting plate, and between the second mounting plate and the third mounting plate. The narrow gap welding torch is fixedly mounted on the third mounting plate. The three sliding mounting plates form a secondary fine-tuning compensation structure, which can slightly adapt to the small size deviation of the weld during the welding process. The clamping assembly continuously provides pre-tightening force to eliminate the sliding gap, the welding torch runs without vibration, and the fusion effect of the weld sidewall is stable.

[0013] Preferably, the clamping assembly includes a fixed block, a movable block, and a spring. A fixed block is fixedly mounted on the upper surface of the first mounting plate and the second mounting plate, and a movable block is fixedly mounted on the lower surface of the second mounting plate and the third mounting plate, respectively. The movable block on the second mounting plate is connected to the fixed block on the first mounting plate via a spring, and the spring between the first mounting plate and the second mounting plate extends along the moving direction of the second mounting plate. The fixed block on the second mounting plate and the movable block on the third mounting plate are connected by a spring, and the spring between the second mounting plate and the third mounting plate extends along the moving direction of the third mounting plate. The bidirectional spring continuously presses against the sliding mating surface, eliminating welding torch offset caused by the gap between the plates, buffering welding vibration, maintaining the stability of the welding torch posture throughout the process, and avoiding problems such as off-center welding and incomplete fusion.

[0014] Preferably, at least two first clamping units are provided. All first clamping units are fixedly installed on the first slide plate. The first slide plate and the support platform are slidably connected through the first slide rail slider assembly. The support platform and the first slide plate are connected through the second drive assembly. Multiple sets of first clamping units slide synchronously to press against the end of the plate. The clamping contact area is large, and the thick plate is firmly clamped during the flipping process, without loosening or slipping.

[0015] A welding method, comprising: Flip the clamping mechanism to a horizontal position, and reset the first clamping unit, the clamping base, and the second clamping unit to their initial positions; The workpiece to be welded is hoisted onto the support platform, and the workpiece is clamped and limited by the first clamping unit, the clamping base and all the second clamping units; The flipping base drives the clamping mechanism and its workpiece to flip to a vertical or near-vertical position. After the workpiece is flipped over, the second slide on the crossbeams on both sides of the workpiece drives the narrow gap welding mechanism to move to the designated height position, and the first moving block and the second moving block drive the narrow gap welding mechanism to abut against the position of the workpiece to be welded. Two narrow-gap welding torches move synchronously along the workpiece to be welded.

[0016] The workpiece is horizontally loaded and clamped at multiple points, making the loading operation simple and safe. After overall flipping, the vertical welding narrow gap process is adopted to solve the slag inclusion defect of horizontal welding. At the same time, the narrow gap weld significantly reduces the filler metal, reduces heat input, and controls the risk of welding deformation and cracking. The dual gun synchronous welding greatly improves the production efficiency of thick plate welding. Moreover, the three-axis moving welding gun automatically moves the gun without manual intervention, and the weld formation has high consistency, making it suitable for large-scale automated welding production of thick plates.

[0017] As can be seen from the above technical solutions, the advantages of the present invention are: 1. The workstation integrates a workpiece overall flipping structure with a dual-sided three-axis narrow-gap welding mechanism. Combined with a multi-directional clamping unit and a support platform, it reliably clamps the entire contour of thick plate workpieces. The workpiece does not slip or loosen during the entire flipping process. It can flip thick plate workpieces from a flat welding posture to a vertical or near-vertical welding state, eliminating the negative impact of gravity on the molten pool and slag during flat and horizontal welding. The molten pool is stable. Furthermore, the use of a narrow-gap welding torch significantly reduces the amount of filler metal used in the weld, reduces welding heat input, suppresses plate deformation and residual stress, reduces the probability of cold cracking, and saves welding wire and welding time. The dual crossbeams independently carry the three-axis welding mechanism, and the two welding torches can weld simultaneously in parallel, resulting in high welding efficiency.

[0018] 2. The second slide feeds the weld along its length, while the first and second moving blocks move the welding torch laterally forward and backward to bring it closer to the welding position. The narrow-gap welding torch is fixedly mounted on a three-layer sliding mounting plate, which forms a secondary fine-tuning compensation structure. During welding, it can slightly adapt to minor deviations in weld size. The clamping assembly continuously provides pre-tightening force to eliminate sliding gaps, ensuring the welding torch operates without vibration and achieving stable fusion of the weld sidewall. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the flip-type multi-axis narrow gap welding workstation according to one or more embodiments of the present invention; Figure 2 This is a schematic diagram of the clamping mechanism according to one or more embodiments of the present invention; Figure 3 This is a schematic diagram of the narrow gap welding mechanism and crossbeam according to one or more embodiments of the present invention; Figure 4 This is a schematic diagram of the narrow gap welding mechanism according to one or more embodiments of the present invention; The components represented by the various reference numerals in the diagram are: 1. Flip-over base; 11. Fixing base; 12. Gear plate; 13. Connecting base; 14. First drive assembly; 2. Clamping mechanism; 21. Support platform; 22. First slide; 23. First clamping unit; 24. Clamping base; 25. Longitudinal beam; 26. Second clamping unit; 27. Second drive assembly; 28. Third drive assembly; 29. ​​Fourth drive assembly; 210. First slide rail slider assembly; 3. Crossbeam; 31. Second slide rail slider assembly; 32. Second slide plate; 33. Rack; 34. Drive motor; 35. First moving block; 36. Second moving block; 4. Narrow gap welding mechanism; 41. First mounting plate; 42. Second mounting plate; 43. Third mounting plate; 44. Narrow gap welding torch; 45. Third slide rail slider assembly; 46. Fourth slide rail slider assembly; 47. Tightening assembly; 471. Fixing block; 472. Third moving block; 473. Spring. Detailed Implementation

[0021] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] Example 1 In a typical embodiment of the present invention, such as Figures 1-4 As shown, a flip-type multi-axis narrow gap welding workstation is proposed, including: a flip base 1, a clamping mechanism 2, a crossbeam 3, and a narrow gap welding mechanism 4. The flip base 1 is fixedly placed on the ground. The clamping mechanism 2 is rotatably mounted on the flip base 1. The flip base 1 can drive the clamping mechanism 2 to adjust to any angle between horizontal and vertical postures, that is, any angle adjustment between 0° and 90°. There are two crossbeams 3, and the two crossbeams 3 are symmetrically fixed on the clamping mechanism 2 along the central axis of the clamping mechanism 2. The crossbeams 3 can follow the clamping mechanism 2 to adjust between horizontal and vertical postures. A narrow gap welding mechanism 4 is movably mounted on each crossbeam 3.

[0023] The flipping base 1 includes a fixed base 11, a geared disc 12, a connecting base 13, and a first drive assembly 14. The fixed base 11 is fixedly set on the ground. The geared disc 12 is vertically set, and there are two geared discs 12, which are arranged opposite to each other. The geared disc 12 is rotatably connected to the fixed base 11 through a rotating shaft. The first drive assembly 14 includes a motor and a reduction gearbox. The first drive assembly 14 is used to drive the geared disc 12 to rotate around the shaft. The connecting base 13 is fixedly set between the two geared discs 12. The clamping mechanism 2 is fixedly installed on the connecting base 13, so that the clamping mechanism 2 can flip around the shaft under the drive of the geared disc 12.

[0024] like Figure 2 As shown, the clamping mechanism 2 includes a support platform 21, a first clamping unit 23, a clamping base 24, a longitudinal beam 25, and a second clamping unit 26. The support platform 21 is a rectangular frame structure. The longitudinal beams 25 are fixedly mounted on the support platform 21. There are several longitudinal beams 25, which are spaced apart along the length of the support platform 21. The two ends of the longitudinal beams 25 extend outward along the width of the support platform 21. The first clamping unit 23 and the clamping base 24 are movably mounted on the support platform 21, and the first clamping unit 23 and the clamping base 24 are positioned opposite each other to clamp and limit the wide side of the workpiece. Each end of the longitudinal beam 25 is correspondingly provided with a second clamping unit 26, which is used to clamp and limit the long side of the workpiece.

[0025] Specifically, the first clamping unit 23 has an L-shaped structure, and at least two first clamping units 23 are provided. All the first clamping units 23 are spaced apart along the width direction of the clamping mechanism 2. All the first clamping units 23 are fixedly mounted on the first slide plate 22 and are slidably connected to the support platform 21 through the first slide plate 22 to achieve synchronous movement of all the first clamping units 23. The first slide plate 22 and the support platform 21 are slidably connected through the first slide rail slider assembly 210. The slide rail of the first slide rail slider assembly 210 extends along the length direction of the support platform 21. The support platform 21 and the first slide plate 22 are slidably connected through the first slide rail slider assembly 210. The slides 22 are also connected by a second drive assembly 27, which includes a first motor, a first lead screw, and a first lead screw nut. The first lead screw is rotatably mounted on the support platform 21 and extends along the length of the support platform 21. The first lead screw is fixedly connected to the output end of the first motor. The first lead screw nut is fixedly mounted on the slide 22 and is threadedly connected to the first lead screw. Thus, the first slide 22 can be driven to move along the length of the support platform 21 through the cooperation of the first lead screw and the first lead screw nut, thereby driving the first clamping unit 23 to clamp the workpiece.

[0026] The clamping base 24 has a rectangular structure, and its length is less than that of the longitudinal beam 25. When the workpiece is erected, it serves as a support and limit for the bottom of the workpiece. The clamping base 24 is also slidably connected to the support platform 21 via the first slide rail slider assembly 210. The support platform 21 and the clamping base 24 are also connected via a third drive assembly 28. The third drive assembly 28 includes a second motor, a second lead screw, and a second lead screw nut. The second lead screw is rotatably mounted on the support platform 21 and extends along the length of the support platform 21. The second lead screw is fixedly connected to the output end of the second motor. The second lead screw nut is fixedly mounted on the clamping base 24 and is threadedly connected to the second lead screw. Thus, the clamping base 24 can be driven to move along the length of the support platform 21 through the cooperation of the second lead screw and the second lead screw nut.

[0027] The longitudinal beam 25 has a hollow structure. The second clamping unit 26 is slidably disposed inside the longitudinal beam 25. The second clamping unit 26 and the longitudinal beam 25 are slidably engaged by a slide rail slider. The second clamping unit 26 extends outward from the longitudinal beam 25. Two second clamping units 26 on the same longitudinal beam 25 are arranged opposite to each other. The two second clamping units 26 are respectively connected to the corresponding longitudinal beam 25 through a fourth drive assembly 29. The fourth drive assembly 29 includes a third motor, a third lead screw, and a third lead screw nut. The third lead screw is rotatably disposed on the longitudinal beam 25 and extends along the length direction of the longitudinal beam 25. The third lead screw is fixedly connected to the output end of the third motor. The third lead screw nut is fixedly disposed on the second clamping unit 26 and is threadedly connected to the third lead screw. Thus, the second clamping unit 26 can be driven to move along the length direction of the longitudinal beam 25 through the engagement of the third lead screw and the third lead screw nut.

[0028] Two crossbeams 3 are provided, and the two crossbeams 3 are symmetrically arranged along the central axis of the support platform 21. The crossbeams 3 are located outside the second clamping unit 26, and are fixedly mounted on the longitudinal beam 25. The axis of the crossbeam 3 is perpendicular to the axis of the longitudinal beam 25. Figure 3 As shown, the crossbeam 3 is slidably connected to the second slide plate 32 via the second slide rail slider assembly 31, and the narrow gap welding mechanism 4 is movably mounted on the second slide plate 32.

[0029] Specifically, the slide rail of the second slide rail slider assembly 31 extends along the length of the crossbeam 3, the slider is fixedly mounted on the second slide plate 32, and a rack 33 is fixedly mounted on the crossbeam 3 along its length. A drive motor 34 is fixedly mounted on the second slide plate 32, and the output end of the drive motor 34 meshes with the rack 33 through a gear, thereby driving the second slide plate 32 to move along the length of the crossbeam 3. A first moving block 35 is movably mounted on the second slide plate 32. The axis of the first moving block 35 is perpendicular to the axis of the crossbeam 3. Both ends of the first moving block 35 extend outward from the second slide plate 32, and a second moving block 36 is movably connected to one end of the first moving block 35 near the central axis of the support platform 21. A narrow gap welding mechanism 4 is fixedly mounted on the second moving block 36.

[0030] In this embodiment, both the first moving block 35 and the second moving block 36 are rectangular block structures. The first moving block 35 and the second slide plate 32, as well as the first moving block 35 and the second moving block 36, are slidably connected by a slide rail slider structure and equipped with a motor rack and pinion drive assembly. The first moving block 35 moves horizontally in a direction away from or close to the central axis of the support platform 21 along its length, and the second moving block 36 moves horizontally in a direction away from or close to the surface of the support platform 21. Specifically, taking the vertical posture as an example, the crossbeam 3 is in the Z-axis direction, the first moving block 35 moves in the X-axis direction, and the second moving block 36 moves in the Y-axis direction.

[0031] like Figure 4 As shown, the narrow gap welding mechanism 4 includes a first mounting plate 41, a second mounting plate 42, a third mounting plate 43, and a narrow gap welding torch 44. The first mounting plate 41 is fixedly mounted on the upper surface of the second moving block 36 by welding or other means. The second mounting plate 42 is slidably connected to the upper surface of the first mounting plate 41 by a third slide rail slider assembly 45. The third mounting plate 43 is slidably connected to the upper surface of the second mounting plate 42 by a fourth slide rail slider assembly 46. The slide rail of the third slide rail slider assembly 45 extends along the moving direction of the second moving block 36, and the slide rail of the fourth slide rail slider assembly 46 extends along the moving direction of the first moving block 35. A clamping assembly 47 is provided between the first mounting plate 41 and the second mounting plate 42, and between the second mounting plate 42 and the third mounting plate 43. The narrow gap welding torch 44 is fixedly mounted on the third mounting plate 43.

[0032] The clamping assembly 47 includes a fixed block 471, a third moving block 472, and a spring 473. The fixed block 471 is fixedly mounted on the corresponding first mounting plate 41 and second mounting plate 42. Each fixed block 471 is fixedly mounted with a guide rod, which is parallel to the corresponding third slide rail slider assembly 45 and fourth slide rail slider assembly 46. The spring 473 is sleeved on the guide rod. One end of the spring 473 is fixedly connected to the adjacent fixed block 471, and the other end of the spring 473 is fixedly connected to the adjacent third moving block 472. Thus, the narrow gap welding torch 44 can be clamped by the action of the spring 473.

[0033] Specifically, a fixing block 471 is fixedly provided on the upper surface of the first mounting plate 41, and a third moving block 472 is fixedly provided on the lower surface of the second mounting plate 42. The third moving block 472 on the second mounting plate 42 is connected to the fixing block 471 on the first mounting plate 41 through a spring 473. The spring 473 between the first mounting plate 41 and the second mounting plate 42 is parallel to the third slide rail slider assembly 45. A fixing block 471 is fixedly provided on the upper surface of the second mounting plate 42, and a third moving block 472 is fixedly provided on the lower surface of the third mounting plate 43. The fixing block 471 on the second mounting plate 42 and the third moving block 472 on the third mounting plate 43 are connected through a spring 473. The spring 473 between the second mounting plate 42 and the third mounting plate 43 is parallel to the fourth slide rail slider assembly 46. A narrow gap welding torch 44 is fixedly provided on the upper surface of the third mounting plate 43.

[0034] Example 2 In another typical embodiment of the present invention, a welding method is proposed, which uses the welding workstation mentioned in Example 1. The welding method includes: First, flip the clamping mechanism 2 and its crossbeam 3 to a horizontal position, and reset the first clamping unit 23, the clamping base 24 and the second clamping unit 26 to their initial positions. The workpiece to be welded is hoisted onto the support platform 21. The first clamping unit 23 and the clamping base 24 move closer to each other under the drive of the second drive assembly 27 and the third drive assembly 28, respectively, so as to clamp and limit the workpiece from the wide side. At the same time, all the second clamping units 26 move closer to each other under the drive of the fourth drive assembly 29, so as to clamp and limit the workpiece from the long side. Then, the base 1 is flipped, which drives the clamping mechanism 2 and the workpiece on it to flip to a vertical or near-vertical position. The specific flipping angle can be set according to actual needs. After the workpiece is flipped, the drive motor 34 on the crossbeams 3 on both sides of the workpiece is started to drive the corresponding second slide 32 to move the narrow gap welding mechanism 4 to the specified height position. Then, the first moving block 35 drives the second moving block 36 and the narrow gap welding mechanism 4 to move horizontally towards the central axis of the support platform 21. The second moving block 36 drives the narrow gap welding mechanism 4 to move horizontally towards the table surface of the support platform 21 so that the narrow gap welding gun 44 is placed at the position to be welded on the workpiece. At the same time, under the action of the spring 473, the narrow gap welding gun 44 abuts against the position to be welded on the workpiece. After the position of the narrow gap welding torch 44 is adjusted, the two drive motors 34 work synchronously, and the two narrow gap welding torches 44 weld simultaneously along the workpiece to be welded position according to the program, so as to achieve symmetrical and coordinated operation.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flip-type multi-axis narrow-gap welding workstation, comprising: The flip base (1) is characterized in that a clamping mechanism (2) is rotatably provided on the flip base (1). The clamping mechanism (2) includes a support platform (21). The two ends of the support platform (21) are respectively provided with a first clamping unit (23) and a clamping base (24). Several second clamping units (26) are movably provided on both sides of the central axis of the length direction of the support platform (21). Two crossbeams (3) are symmetrically fixed on both sides of the central axis of the length direction of the support platform (21). The crossbeams (3) are located outside the second clamping units (26). Each crossbeam (3) is provided with a narrow gap welding mechanism (4) that moves along three axes.

2. The tilting multi-axis narrow gap welding workstation according to claim 1, characterized in that, Several longitudinal beams (25) are fixedly provided at intervals along the length direction of the support platform (21). The two ends of the longitudinal beams (25) extend outward along the width direction of the support platform (21). Each longitudinal beam (25) has a second clamping unit (26) movably provided at both ends. The crossbeam (3) is fixedly provided on the longitudinal beam (25).

3. The flip-type multi-axis narrow-gap welding workstation according to claim 2, characterized in that, The clamping base (24) is a rectangular structure. The length of the clamping base (24) is less than the length of the longitudinal beam (25). The clamping base (24) is slidably connected to the support platform (21) through the first slide rail slider assembly (210). The support platform (21) and the clamping base (24) are connected through the third drive assembly (28).

4. The flip-type multi-axis narrow gap welding workstation according to claim 2, characterized in that, The longitudinal beam (25) is a hollow structure. The second clamping unit (26) is slidably disposed inside the longitudinal beam (25). The two second clamping units (26) on the same longitudinal beam (25) are arranged opposite to each other. The two second clamping units (26) are respectively connected to the longitudinal beam (25) through a fourth drive assembly (29).

5. The tilting multi-axis narrow gap welding workstation according to claim 1, characterized in that, A second slide (32) is slidably connected to the crossbeam (3). A rack (33) is fixedly provided on the crossbeam (3) along its length direction. A drive motor (34) is fixedly provided on the second slide (32). The output end of the drive motor (34) meshes with the rack (33) through a gear. A narrow gap welding mechanism (4) is movably installed on the second slide (32).

6. The tilting multi-axis narrow gap welding workstation according to claim 5, characterized in that, A first moving block (35) is movably installed on the second slide (32). The axis of the first moving block (35) is perpendicular to the axis of the crossbeam (3). The first moving block (35) moves horizontally in the direction away from or close to the central axis of the support platform (21). A second moving block (36) is movably connected to one end of the first moving block (35) close to the central axis of the support platform (21) in the length direction. The second moving block (36) moves horizontally in the direction away from or close to the table surface of the support platform (21). Both the first moving block (35) and the second moving block (36) are electrically driven structures. A narrow gap welding mechanism (4) is fixedly installed on the second moving block (36).

7. The tilting multi-axis narrow gap welding workstation according to claim 6, characterized in that, The narrow gap welding mechanism (4) includes a first mounting plate (41) fixedly mounted on the second moving block (36), a second mounting plate (42) slidably connected to the first mounting plate (41), a third mounting plate (43) slidably connected to the second mounting plate (42), the moving direction of the second mounting plate (42) is the same as the moving direction of the second moving block (36), the moving direction of the third mounting plate (43) is the same as the moving direction of the first moving block (35), a clamping assembly (47) is provided between the first mounting plate (41) and the second mounting plate (42), and between the second mounting plate (42) and the third mounting plate (43), and the narrow gap welding torch (44) is fixedly mounted on the third mounting plate (43).

8. The tilting multi-axis narrow gap welding workstation according to claim 7, characterized in that, The clamping assembly (47) includes a fixed block (471), a third moving block (472), and a spring (473). A fixed block (471) is fixed on the upper surface of the first mounting plate (41) and the second mounting plate (42), and a third moving block (472) is fixed on the lower surface of the second mounting plate (42) and the third mounting plate (43). The third moving block (472) on the second mounting plate (42) is connected to the fixed block (471) on the first mounting plate (41) through the spring (473). The spring (473) between the first mounting plate (41) and the second mounting plate (42) extends along the moving direction of the second mounting plate (42). The fixed block (471) on the second mounting plate (42) and the third moving block (472) on the third mounting plate (43) are connected by the spring (473). The spring (473) between the second mounting plate (42) and the third mounting plate (43) extends along the moving direction of the third mounting plate (43).

9. The tilting multi-axis narrow gap welding workstation according to claim 1, characterized in that, At least two first clamping units (23) are provided. All first clamping units (23) are fixedly installed on the first slide (22). The first slide (22) and the support platform (21) are slidably connected through the first slide rail slider assembly (210). The support platform (21) and the first slide (22) are connected through the second drive assembly (27).

10. A welding method employing a tilting multi-axis narrow-gap welding workstation as described in any one of claims 6-8, characterized in that, include: Flip the clamping mechanism (2) to a horizontal position, and reset the first clamping unit (23), the clamping base (24), and the second clamping unit (26) to their initial positions; The workpiece to be welded is hoisted onto the support platform (21), and the workpiece is clamped and limited by the first clamping unit (23), the clamping base (24) and all the second clamping units (26); The flipping base (1) drives the clamping mechanism (2) and its workpiece to flip to a vertical or near-vertical state. After the workpiece is flipped over, the second slide (32) on the crossbeams (3) on both sides of the workpiece drives the narrow gap welding mechanism (4) to move to the specified height position, and the first moving block (35) and the second moving block (36) drive the narrow gap welding mechanism (4) to abut against the position of the workpiece to be welded. Two narrow-gap welding torches (44) move synchronously along the workpiece to be welded position for welding.

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