Intelligent automatic steel pipe laser resistance welding machine for improving weld quality

Abstract

The application discloses an intelligent automatic steel pipe laser resistance welding machine for improving welding quality, and belongs to the technical field of laser welding, which comprises a gantry stand, a mounting seat fixed on one side of the gantry, a shaft pipe horizontally arranged on the mounting seat, a moving plate vertically and slidably arranged on the side wall of the gantry stand, a fixed guide frame horizontally fixed on one side of the moving plate through a reinforcing plate, two roll welding wheel assemblies arranged in an up-down mode, the two roll welding wheel assemblies being respectively installed on one side of the moving plate and the shaft pipe, a machine shell fixed on the gantry stand, a machine base installed on one side of the machine shell, and a laser welding device fixed on the machine base. The roll welding wheel assembly and the laser welding device in the application can work synchronously to improve welding efficiency. The laser welding device can be displaced to an upstream work station or a downstream work station of the roll welding wheel assembly along with the moving plate, the stress state and the surface quality of the welding seam are improved, and intelligent welding is realized.

Description

Technical Field

[0001] This invention belongs to the field of laser welding technology, specifically an intelligent automated laser resistance welding machine for steel pipes that improves weld quality. Background Technology

[0002] In steel pipe manufacturing, resistance welding and laser welding are two mainstream continuous welding processes. Traditional steel pipe resistance welding machines typically use symmetrically arranged welding rollers to continuously weld the pipe blanks by resistance heating at the butt joint. However, resistance welding of steel pipes has weak edge treatment, failing to effectively close the weld edges, and the fixed roller axis results in low flexibility. While laser welding can effectively achieve continuous welding of steel pipes, it cannot weld and fix the overlapping parts of the steel pipe joints. Therefore, it is necessary to provide an intelligent and automated steel pipe laser resistance welding machine to improve weld quality and solve the problems mentioned in the background. Summary of the Invention

[0003] To achieve the above objectives, the present invention provides the following technical solution: an intelligent automated laser resistance welding machine for steel pipes to improve weld quality, comprising:

[0004] Gantry frame;

[0005] A mounting base is fixed to one side of the gantry frame, and a shaft tube is horizontally arranged on the mounting base;

[0006] The movable plate is vertically slidably mounted on the side wall of the gantry frame and located above the mounting base. One side of the movable plate is horizontally fixed with a guide frame by a reinforcing plate.

[0007] There are two roller welding wheel assemblies, one above the other, with each assembly mounted on one side of the moving plate and the other on the shaft tube.

[0008] The housing is fixed on the gantry frame and located above the moving plate. A base is installed on one side of the housing. A sliding rod is vertically slidably installed below the base. The lower end of the sliding rod is connected to the welding wheel assembly below.

[0009] The laser welding device is fixed on the base.

[0010] Furthermore, as a preferred embodiment, a guide shaft is horizontally slidably disposed inside the shaft tube, and one of the welding roller assemblies is installed at one end of the guide shaft; and an inner connecting column is horizontally slidably disposed inside the fixed guide frame, and another welding roller assembly is installed at one end of the inner connecting column;

[0011] A fixed shaft is horizontally slidably mounted on the housing. One end of the fixed shaft is fixed to the base. A lifting cylinder is installed inside the base. One end of the lifting cylinder is connected to the sliding rod.

[0012] Furthermore, as a preferred embodiment, the gantry frame is provided with a roller frame, the pre-assembled steel pipe is placed on the roller frame, and the shaft tube is equipped with an internal support tensioning clamp, the surface of which is embedded with rollers.

[0013] Furthermore, preferably, the laser welding apparatus includes:

[0014] A connecting column, one end of which is horizontally fixed to the machine base, and a positioning plate is fixed to the other end of the connecting column;

[0015] A transfer plate is horizontally slidably connected to the positioning plate. A connecting plate is slidably installed below the transfer plate via a support rod. A U-shaped frame is fixed to one side of the connecting plate.

[0016] An angle adjuster is fixed on the U-shaped frame, and a laser welder is installed on one side of the angle adjuster.

[0017] Furthermore, as a preferred embodiment, a fine-tuning cylinder is fixed above the transfer plate, one end of which is fixed to the connecting plate; and an adjusting cylinder is horizontally fixed on one side of the positioning plate, one end of which is connected to the transfer plate.

[0018] During the telescopic adjustment of the regulating cylinder, the laser welder moves with the transfer plate to the upstream or downstream position of the rolling welding wheel assembly.

[0019] Furthermore, preferably, the roll welding wheel assembly includes:

[0020] A cylinder liner, with an inner ring seat fixed at its center, and a connecting shaft horizontally arranged in the inner ring seat;

[0021] An outer roller pad is mounted at one end of the connecting shaft;

[0022] The mounting plate is fixed inside the cylinder liner and located on one side of the inner ring seat, and an inner tube sleeve is fixed in the center of the mounting plate.

[0023] An inner roller pad is installed at one end of the inner sleeve.

[0024] Furthermore, as a preferred embodiment, the outer roller pad and the inner roller pad are of the same size and the distance between them is not less than 12mm.

[0025] Furthermore, as a preferred embodiment, a rotating disk is rotatably disposed in the inner ring seat, and an eccentric sleeve is coaxially fixed inside the rotating disk, with the connecting shaft eccentrically fixed in the eccentric sleeve;

[0026] A support ring is coaxially arranged in the outer roller pad, and multiple inner springs are circumferentially distributed between the support ring and the outer roller pad; and the support ring is rotatably connected to one end of the connecting shaft.

[0027] Furthermore, as a preferred embodiment, an annular shaft is fixed on the inner tube sleeve, and the inner roller welding pad is rotatably sleeved on the annular shaft; the mounting plate has multiple circumferentially distributed positioning holes, and a sliding shaft is slidably connected in each positioning hole. One end of each sliding shaft is universally hinged to a connecting rod. A support plate is provided on the side of the cylinder sleeve near the inner roller welding pad, and the other end of each connecting rod is hinged to the support plate.

[0028] The support plate has multiple balls distributed on one end face near the inner roller pad.

[0029] Furthermore, as a preferred embodiment, a fixed machine plate is fixed inside the cylinder liner, and the other end of each of the sliding shafts is slidably connected in the fixed machine plate. A plurality of top shafts corresponding to the sliding shafts are provided inside the fixed machine plate. Each of the top shafts is radially slidably connected in the fixed machine plate, and a slanted push block is fixed to one end of the top shaft. One side of the slanted push block abuts against and contacts the sliding shaft.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] The roller welding wheel assembly in this invention can perform roller welding on overlapping parts of steel pipe splices, while the laser welding device effectively performs laser welding on the weld seam. The two can work simultaneously to improve welding efficiency. In addition, the laser welder in the laser welding device can be moved to the upstream or downstream position of the roller welding wheel assembly along with the transfer plate. When it is in the upstream position, the laser first preheats the weld bevel, and then the roller welding wheel performs resistance welding to achieve heat conduction welding. When the laser welder moves to the downstream position of the roller welding wheel, the roller welding wheel assembly first completes resistance welding, and then the laser remelts and heat-treats the weld seam to improve the stress state and surface quality of the weld seam, realizing intelligent welding operation. Moreover, the outer and inner roller welding pads mainly set in the roller welding wheel assembly can also be used as shaping wheels according to welding requirements, which can fully compress the welding position of the steel pipe, reduce residual porosity and shrinkage cavities at the welding position, and further improve the welding quality. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is the front view of the present invention;

[0034] Figure 3 This is a schematic diagram of the laser welding device in this invention;

[0035] Figure 4This is a schematic diagram of the structure of the roller welding wheel assembly in this invention;

[0036] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0037] Figure 6 This is a schematic diagram of the internal structure of the outer roller pad in this invention;

[0038] Figure 7 This is a schematic diagram of steel pipe welding in this invention;

[0039] In the diagram: 1. Gantry frame; 11. Mounting base; 12. Shaft tube; 13. Moving plate; 14. Reinforcing plate; 15. Fixed guide frame; 16. Machine housing; 17. Fixed shaft; 2. Roller welding wheel assembly; 21. Cylinder liner; 22. Inner ring seat; 23. Connecting shaft; 24. Outer roller welding pad; 25. Mounting plate; 26. Inner tube sleeve; 27. Inner roller welding pad; 3. Machine base; 31. Sliding rod; 32. Internal support tensioning clamp 4. Laser welding device; 41. Connecting column; 42. Positioning plate; 43. Transfer plate; 44. Connecting plate; 45. U-shaped frame; 46. Angle adjuster; 47. Laser welder; 48. Fine adjustment cylinder; 49. Adjustment cylinder; 5. Rotary disk; 51. Eccentric sleeve; 52. Ring shaft; 53. Sliding shaft; 54. Connecting rod; 55. Support plate; 56. Ball bearing; 57. Fixed machine plate; 58. Top shaft. Detailed Implementation

[0040] Please see Figures 1-7 In this embodiment of the invention, an intelligent automated laser resistance welding machine for steel pipes to improve weld quality includes:

[0041] Gantry frame 1;

[0042] Mounting base 11 is fixed to one side of the gantry frame 1, and a shaft tube 12 is horizontally arranged on the mounting base 11; the gantry frame 1 serves as the basic support skeleton of the entire equipment, and is welded from high-strength steel, which has extremely high structural rigidity and seismic resistance, and is used to ensure the positional accuracy of each actuator during operation.

[0043] The movable plate 13 is vertically slidably mounted on the side wall of the gantry frame 1 and located above the mounting base 11. One side of the movable plate 13 is horizontally fixed with a fixed guide 15 by a reinforcing plate 14.

[0044] Two welding roller assemblies 2 are arranged vertically, one above the other. The two welding roller assemblies 2 are respectively mounted on one side of the moving plate 13 and the shaft tube 12. The moving plate 13 can move up and down, thereby causing the upper welding roller assembly 2 to move closer to or away from the lower welding roller assembly 2. The reinforcing plate 14 has an inverted U-shaped structure, used to increase the connection strength between the fixed guide frame 15 and the moving plate 13, preventing deformation of the cantilever structure under stress. The two welding roller assemblies 2 constitute the upper welding roller assembly and the lower welding roller assembly, respectively. The upper welding roller assembly 2 moves up and down with the moving plate 13, serving as an active pressure roller; the lower welding roller assembly 2 is fixed to one side of the shaft tube 12, serving as a support roller. This split vertical layout allows the welding machine to apply pressure and welding current simultaneously from both the inner and outer walls of the steel pipe, achieving efficient welding.

[0045] The housing 16 is fixed on the gantry frame 1 and located above the moving plate 13. A base 3 is installed on one side of the housing 16. A sliding rod 31 is vertically slidably installed below the base 3. The lower end of the sliding rod 31 is connected to the welding roller assembly 2 below. The base 3 serves as a support platform for the laser welding device 4 and the lifting actuator. The sliding rod 31 is used to transmit the driving force of the lifting cylinder inside the base 3 to the welding roller assembly 2 below, so that it can be pressed along the surface of the steel pipe to compensate for the roundness error of the steel pipe or the welding heat deformation.

[0046] The laser welding device 4 is fixed on the base 3. Its function is to perform laser tracking or laser remelting / welding on the weld seam at the same time or before and after resistance rolling welding. Through the synergistic effect of the combined heat source of laser and resistance welding, the weld seam forming quality is significantly improved and defects such as porosity and cracks are reduced.

[0047] In this embodiment, a guide shaft is horizontally slidably disposed inside the shaft tube 12. One of the welding roller assemblies 2 (i.e., the lower welding roller assembly) is installed at one end of the guide shaft. The guide shaft can extend and retract axially along the shaft tube 12 to adapt to changes in the length direction of the steel pipe end or to adjust the welding start position. Furthermore, an inner connecting column is horizontally slidably disposed inside the fixed guide frame 15. Another welding roller assembly 2 (i.e., the upper welding roller assembly) is installed at one end of the inner connecting column, which can also achieve axial position adjustment.

[0048] A fixed shaft 17 is horizontally slidably mounted on the housing 16. One end of the fixed shaft 17 is fixed to the base 3. By sliding the fixed shaft 17 horizontally, the entire base 3 and the laser welding device 4 can be moved axially along the steel pipe. A lifting cylinder is provided inside the base 3. One end of the lifting cylinder is connected to the sliding rod 31. The lifting cylinder is used to provide lifting displacement control. Its air pressure or hydraulic pressure is adjustable, thereby ensuring that the welding roller assembly 2 on one side of the fixed guide 15 can contact the surface of the steel pipe.

[0049] In a preferred embodiment, the gantry frame 1 is equipped with a roller frame (not shown in the figure). The pre-assembled steel pipes are rolled on the roller frame, which supports and drives the steel pipes to rotate uniformly around their own axis to achieve circumferential welding or spiral welding. Before welding, the ends of the two steel pipes can be sleeved together and temporarily fixed. For some large-diameter steel pipes, the roller frame can support and bear the load on the steel pipes, and drive the steel pipes to rotate smoothly during welding. During welding, the steel pipes are sleeved on the outside of the shaft tube 12, and the two rolling welding wheel assemblies 2 contact the inner and outer walls of the steel pipe joint, respectively, thereby realizing rolling welding of the steel pipes.

[0050] Furthermore, an internal support tensioning clamp 32 is installed on the shaft tube 12, and rollers are embedded and distributed on the surface of the internal support tensioning clamp 32. For some steel pipes of conventional diameter, the internal support tensioning clamp 32 can be used to support and bear the load from the inside of the steel pipe. The rollers on its surface can form rolling friction with the inner wall of the steel pipe, which not only ensures the support effect, but also allows the steel pipe to rotate smoothly during the welding process and avoids scratching the inner wall of the pipe.

[0051] In this embodiment, the laser welding device 4 includes a connecting column 41, a transfer plate 43, an angle adjuster 46, and a laser welder 47.

[0052] One end of the connecting column 41 is horizontally fixed to the base 3, serving as the main support arm of the laser welding device 4. The other end of the connecting column 41 is fixed with a positioning plate 42, which is a precision machined flat plate used to provide a high-precision mounting surface.

[0053] The transfer plate 43 is horizontally slidably connected to the positioning plate 42 via a linear slide rail. A connecting plate 44 is slidably mounted below the transfer plate 43 via a support rod, and a U-shaped frame 45 is fixed to one side of the connecting plate 44. The support rod consists of two parallel guide rods, which, in conjunction with a linear bearing, guide the lifting and lowering of the connecting plate 44, ensuring the smoothness of the lifting and lowering movement of the laser welder 47.

[0054] The angle adjuster 46 is fixed on the U-shaped frame 45. The angle adjuster 46 is preferably a worm gear rotary table or a precision rotating shaft, and has a self-locking function. A laser welder 47 is mounted on one side of the angle adjuster 46. By adjusting the angle adjuster 46, the laser welder 47 can rotate around a horizontal axis, thereby changing the incident angle of the laser beam relative to the surface of the steel pipe to adapt to the welding requirements of steel pipes with different wall thicknesses and materials.

[0055] Furthermore, a fine-tuning cylinder 48 is fixed above the transfer plate 43, one end of which is fixed to the connecting plate 44. This fine-tuning cylinder 48 is used to precisely control the vertical distance between the laser welder 47 and the surface of the steel pipe. An adjusting cylinder 49 is horizontally fixed to one side of the positioning plate 42, one end of which is connected to the transfer plate 43. During the extension and retraction adjustment of the adjusting cylinder 49, the laser welder 47 moves with the transfer plate 43 to either the upstream or downstream position of the welding roller assembly 2. Specifically, when the adjusting cylinder 49 extends, the laser welder 47 moves to the front (upstream) of the welding roller. At this time, the laser first preheats the weld bevel, and then the welding roller performs resistance welding to achieve heat conduction welding. When the adjusting cylinder 49 retracts, the laser welder 47 moves to the rear (downstream) of the welding roller. At this time, the welding roller first completes resistance welding, and then the laser remelts and heat-treats the weld to improve the stress state and surface quality of the weld.

[0056] In this embodiment, the roller welding assembly 2 includes a cylinder liner 21, an outer roller welding pad 24, a mounting plate 25, and an inner roller welding pad 27. The cylinder liner 21 is a cylindrical shell with an inner ring seat 22 fixed at its center, and a connecting shaft 23 is horizontally arranged in the inner ring seat 22. The outer roller welding pad 24 is mounted on one end of the connecting shaft 23. The outer roller welding pad 24 is an annular copper alloy electrode that is in direct contact with the outer wall of the steel pipe and is used to conduct welding current and apply pressure.

[0057] The mounting plate 25 is fixed inside the cylinder liner 21 and located on one side of the inner ring seat 22. An inner tube sleeve 26 is fixed at the center of the mounting plate 25. The inner roll welding pad 27 is installed at one end of the inner tube sleeve 26. The inner roll welding pad 27 is also a ring-shaped copper alloy electrode.

[0058] Furthermore, the outer roller pad 24 and the inner roller pad 27 are of the same size and the distance between them is not less than 12mm. During welding, one of the outer roller pad 24 and the inner roller pad 27 can be used as a shaping wheel, while the other is energized and resistance welding is performed. In traditional energized welding, both the upper and lower rollers generate resistance heat, resulting in a large heat-affected zone in the entire welding area. The metal is prone to irregular flash (burrs) and inner wall weld points in a high-temperature plastic state. In this device, when one of the rollers (preferably the outer roller pad 24) is de-energized and used as a shaping wheel, it does not generate resistance heat, but only provides mechanical upsetting force. This squeezes out the residual pores and shrinkage cavities inside, while flattening the overflowing flash to the weld reinforcement range. Since the shaping wheel does not generate heat, its surface temperature is low, which can quickly absorb heat to assist in the solidification of the weld.

[0059] In this embodiment, a rotating disk 5 is rotatably disposed within the inner ring seat 22. This rotating disk 5 can be driven by an external servo motor for precise angular displacement. An eccentric sleeve 51 is coaxially fixed inside the rotating disk 5, and the connecting shaft 23 is eccentrically fixed within the eccentric sleeve 51. When the rotating disk 5 rotates, the eccentric sleeve 51 causes the connecting shaft 23 to undergo radial displacement, thereby changing the relative height of the outer rolling welding pad 24. When the outer rolling welding pad 24 acts as a shaping wheel, the clamping force of the upper and lower outer rolling welding pads 24 can be adjusted. Compared with traditional spring or cylinder clamping, this eccentric adjustment structure has the advantages of a large pressure adjustment range, fast response speed, and precise quantification.

[0060] A support ring 6 is coaxially arranged in the outer roller welding pad 24. Multiple inner springs 61 are circumferentially distributed between the support ring 6 and the outer roller welding pad 24. The inner springs 61 are used to provide elastic preload. The support ring 6 is rotatably connected to one end of the connecting shaft 23. The support ring 6 acts as an intermediate floating component to ensure the smooth rotation of the outer roller welding pad 24. Specifically, the two outer roller welding pads 24 distributed vertically can approach each other under the rotation adjustment of the eccentric sleeve 51, forming a squeezing effect on the steel pipe fitting position. During welding, the steel pipe rotates on its own, driving the outer roller welding pads 24 to rotate synchronously. The outer roller welding pads 24 can use the axis of the connecting shaft 23 as the center of rotation, and can continuously maintain the squeezing contact effect on the steel pipe during rolling welding.

[0061] In this embodiment, an annular shaft 52 is fixed on the inner sleeve 26, and the inner roller welding pad 27 is rotatably sleeved on the annular shaft 52; the mounting plate 25 has a plurality of circumferentially distributed positioning holes, and each positioning hole is slidably connected to a sliding shaft 53. One end of each sliding shaft 53 is universally hinged to a connecting rod 54. A support plate 55 is provided on the side of the cylinder liner 21 near the inner roller welding pad 27, and the other end of each connecting rod 54 is hinged to the support plate 55.

[0062] Multiple balls 56 are distributed on one end face of the support plate 55 near the inner roller welding pad 27, and the balls 56 form rolling contact with the back of the inner roller welding pad 27. When each sliding shaft 53 slides and adjusts axially (not a uniform displacement), the connecting rod 54 pushes the support plate 55 to produce an angular sway, the support plate 55 forms an inclined positioning and uses the balls 56 to contact the inner roller welding pad 27, causing it to rotate synchronously around the ring shaft 52. This allows the inner roller welding pad 27 to be relatively tilted as a whole. At this time, the two inner roller welding pads 27, which are symmetrically distributed vertically, can make inclined contact with the steel pipe during welding and rotate synchronously with the steel pipe. On the one hand, it can adapt to the convex edge formed on the surface of the steel pipe, and can effectively perform rolling welding on the non-flat butt joint surface of the steel pipe during welding. It solves the problem that the traditional roller welding wheel cannot adjust the angle and cannot effectively roll weld the arc arch on the surface of the steel pipe. On the other hand, it can form a lateral extrusion contact with the surface of the steel pipe, and can approach or move away from the welding position of the outer roller welding pad 24, effectively controlling the reasonable distance between the pressure point and the welding point.

[0063] In this embodiment, a fixed machine plate 57 is fixed inside the cylinder liner 21. The other end of each sliding shaft 53 is slidably connected to the fixed machine plate 57. Multiple top shafts 58 corresponding to the sliding shafts 53 are provided inside the fixed machine plate 57. Each top shaft 58 is radially slidably connected inside the fixed machine plate 57, and one end of each top shaft 58 is fixed with a slanted push block. One inclined surface of the slanted push block abuts against the sliding shaft 53. When the top shaft 58 moves radially inward, the inclined surface of the slanted push block presses against the end of the sliding shaft 53, driving the sliding shaft 53 to move axially. The top shaft 58 can be independently driven by a micro cylinder or an electromagnet, thereby achieving independent and precise control of the position of each sliding shaft 53. This allows for angular deflection of the inner rolling welding pad 27 in any direction, greatly improving the adaptability of the welding machine to complex welding surfaces. It also enables precise control of the reasonable distance between the pressure point and the welding point, achieving optimal welding performance during steel pipe welding.

[0064] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent automated laser resistance welding machine for steel pipes to improve weld quality, characterized in that, It includes: Gantry frame (1); Mounting base (11) is fixed to one side of the gantry frame (1), and a shaft tube (12) is horizontally arranged on the mounting base (11). The movable plate (13) is vertically slidably mounted on the side wall of the gantry frame (1) and located above the mounting base (11). One side of the movable plate (13) is horizontally fixed with a fixed guide (15) by a reinforcing plate (14). There are two roller welding wheel assemblies (2) arranged vertically, and the two roller welding wheel assemblies (2) are respectively installed on one side of the moving plate (13) and the shaft tube (12); The housing (16) is fixed on the gantry frame (1) and located above the moving plate (13). A base (3) is installed on one side of the housing (16). A sliding rod (31) is vertically slidably installed below the base (3). The lower end of the sliding rod (31) is connected to the lower roller welding wheel assembly (2). The laser welding device (4) is fixed on the base (3).

2. The intelligent automated laser resistance welding machine for improving weld quality according to claim 1, characterized in that: A guide shaft is horizontally slidably arranged inside the shaft tube (12), and one of the roller welding wheel assemblies (2) is installed at one end of the guide shaft; and an inner column is horizontally slidably arranged inside the fixed guide frame (15), and another roller welding wheel assembly (2) is installed at one end of the inner column; A fixed shaft (17) is horizontally slidably mounted on the housing (16). One end of the fixed shaft (17) is fixed to the base (3). A lifting cylinder is provided inside the base (3). One end of the lifting cylinder is connected to the sliding rod (31).

3. The intelligent automated laser resistance welding machine for improving weld quality according to claim 1, characterized in that: The gantry frame (1) is provided with a roller frame, and the pre-assembled steel pipe is placed on the roller frame. The shaft tube (12) is equipped with an internal support tensioning clamp (32), and rollers are embedded and distributed on the surface of the internal support tensioning clamp (32).

4. The intelligent automated laser resistance welding machine for improving weld quality according to claim 1, characterized in that, The laser welding device (4) includes: A connecting column (41) is horizontally fixed at one end to the base (3), and a positioning plate (42) is fixed at the other end of the connecting column (41). The transfer plate (43) is horizontally slidably connected to the positioning plate (42). A connecting plate (44) is slidably installed below the transfer plate (43) via a support rod. A U-shaped frame (45) is fixed on one side of the connecting plate (44). An angle adjuster (46) is fixed on the U-shaped frame (45), and a laser welder (47) is installed on one side of the angle adjuster (46).

5. The intelligent automated laser resistance welding machine for improving weld quality according to claim 4, characterized in that: A fine-tuning cylinder (48) is fixed above the transfer plate (43), and one end of the fine-tuning cylinder (48) is fixed to the connecting plate (43); and an adjusting cylinder (49) is horizontally fixed on one side of the positioning plate (42), and one end of the adjusting cylinder (49) is connected to the transfer plate (43). During the telescopic adjustment of the regulating cylinder (49), the laser welder (47) moves with the transfer plate to the upstream or downstream position of the roller welding wheel assembly (2).

6. The intelligent automated laser resistance welding machine for improving weld quality according to claim 1, characterized in that, The roll welding wheel assembly (2) includes: The cylinder liner (21) has an inner ring seat (22) fixed at its center, and a connecting shaft (23) is horizontally arranged in the inner ring seat (22). An outer roller pad (24) is mounted at one end of the connecting shaft (23); Mounting disc (25) is fixed inside the cylinder liner (21) and located on one side of the inner ring seat (22). An inner tube sleeve (26) is fixed in the center of the mounting disc (25). An inner roller pad (27) is installed at one end of the inner sleeve (26).

7. The intelligent automated laser resistance welding machine for improving weld quality according to claim 6, characterized in that: The outer roller pad (24) and the inner roller pad (27) are the same size and have a spacing of not less than 12 mm.

8. The intelligent automated laser resistance welding machine for improving weld quality according to claim 6, characterized in that: A rotating disk (5) is rotatably disposed in the inner ring seat (22), and an eccentric sleeve (51) is coaxially fixed inside the rotating disk (5). The connecting shaft (23) is eccentrically fixed in the eccentric sleeve (51). A support ring (6) is coaxially arranged in the outer roller pad (24), and multiple inner springs (61) are circumferentially distributed between the support ring (6) and the outer roller pad (24); and the support ring (61) is rotatably connected to one end of the connecting shaft (23).

9. The intelligent automated laser resistance welding machine for improving weld quality according to claim 6, characterized in that: The inner sleeve (26) is fixed with a ring shaft (52), and the inner roller welding pad (27) is rotatably sleeved on the ring shaft (52); the mounting plate (25) has multiple circumferentially distributed positioning holes, and each positioning hole is slidably connected with a sliding shaft (53). One end of each sliding shaft (53) is universally hinged with a connecting rod (54). A support plate (55) is provided on the side of the cylinder liner (21) near the inner roller welding pad (27), and the other end of each connecting rod (54) is hinged to the support plate (55). The support plate (55) has multiple balls (56) distributed on one end face near the inner roller pad (27).

10. The intelligent automated laser resistance welding machine for improving weld quality according to claim 9, characterized in that: A fixed machine plate (57) is fixed inside the cylinder liner (21). The other end of each of the sliding shafts (53) is slidably connected in the fixed machine plate (57). A plurality of top shafts (58) corresponding to the sliding shafts (53) are provided inside the fixed machine plate (57). Each of the top shafts (58) is radially slidably connected in the fixed machine plate (57), and a slanted push block is fixed at one end of the top shaft (58). One side of the slanted push block abuts against the sliding shaft (53).

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