Automatic welding machine and welding process for superaustenitic stainless steel

Abstract

The invention provides a superaustenitic stainless steel automatic welding machine and welding technology.The welding machine comprises a welding assembly, a rotating assembly and a bearing assembly, the welding assembly comprises a welding head support and a plurality of welding heads distributed on the welding head support in the circumferential direction, and each welding head is arranged in the radial direction of the welding head support; the radial inner end of each welding head can be adjusted to a welding seam of the workpiece to be welded so as to weld the welding seam; the rotating assembly is arranged on one side of the welding head support and can rotate the welding head support to drive the multiple welding heads to synchronously move in the circumferential direction so as to complete welding of a welding seam. The bearing assemblies are arranged on the two sides of the welding assembly and used for containing a to-be-welded workpiece, and the bearing assemblies can place a weld joint of the to-be-welded workpiece in the welding assembly and align the weld joint with the welding head so that the welding head can weld the weld joint conveniently. Multiple groups of welding heads move at a high speed along the contour of the welding seam, so that the whole welding seam is synchronously welded and fused, the welding time is effectively shortened, the welding efficiency is improved, and large-scale production is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of metal welding, and in particular to a super austenitic stainless steel automatic welding machine and a welding process. Background Art

[0002] S31254 is a super austenitic stainless steel. Due to its high molybdenum content, it has extremely high resistance to pitting and crevice corrosion. This grade of stainless steel is developed for use in environments containing halides such as seawater. S31254 also has good resistance to uniform corrosion. Especially in halide-containing acids, this steel is better than ordinary stainless steel. Its carbon content is <0.03%, so it is called pure austenitic stainless steel, and carbon content <0.01% is also called super austenitic stainless steel.

[0003] Stainless steel has excellent corrosion resistance and mechanical properties, and is widely used in many fields such as household appliances, kitchen utensils, automobiles, and the nuclear industry. In particular, austenitic stainless steel has excellent processability and weldability, and also has excellent mechanical strength at a relatively high temperature of about 900K. Therefore, austenitic stainless steel is often used as structural materials, cladding pipes, etc. for various structures, and most structures are made by welding. Commonly used welding processes include arc welding processes such as SMAW and TIG, and laser welding processes.

[0004] Patent publication number CN113102878A discloses a welding device and a welding process, including: a welding gun for welding two parts; a rolling device for squeezing the molten pool generated after the two parts are welded to improve the welding strength. The welding device provided by the present application adds a rolling device, so that the rolling device squeezes the molten pool generated after the two parts are welded, promotes the recrystallization of grains between some intervals in the molten pool, and introduces deformation strengthening, thereby improving the strength of the molten pool area after laser welding and reducing the risk of cracking of the two parts at the weld position after welding.

[0005] The welding equipment passes the welding gun along the gap between two parts, and uses high temperature to melt the metal in the gap, forming a molten pool between the two parts. The molten metal gradually cools and solidifies to form a weld, and connects the metal parts on both sides of the molten pool. The welding adopts a sequential welding process, and the parts and the laser beam move relative to each other. The melting of the welds needs to be carried out in sequence, which takes a long time and is not conducive to large-scale production. Summary of the invention

[0006] The purpose of the present invention is to solve at least one of the above-mentioned deficiencies in the prior art. For example, one of the purposes of the present invention is to provide a super austenitic stainless steel automatic welding machine and welding process to overcome the technical defects of the prior art that the sequential welding process used results in a long processing time and is not conducive to large-scale production.

[0007] In order to achieve the above-mentioned objectives, on the one hand, the present invention provides a super austenitic stainless steel automatic welding machine, which includes a welding assembly, a rotating assembly and a bearing assembly, wherein the welding assembly may include a welding head bracket and a plurality of welding heads distributed circumferentially on the welding head bracket, each welding head is arranged along the radial direction of the welding head bracket, and the radial inner end of each welding head can be adjusted to the weld of the workpiece to be welded to weld the weld; the rotating assembly is arranged on one side of the welding head bracket, and the rotating assembly can rotate the welding head bracket to drive the plurality of welding heads to move synchronously along the circumferential direction to complete the welding of the weld; the bearing assemblies are arranged on both sides of the welding assembly for placing the workpiece to be welded, and the bearing assemblies can place the weld of the workpiece to be welded in the welding assembly and align it with the welding head to facilitate the welding of the weld by the welding head.

[0008] Optionally, the welding machine may also include a laser generator and an optical fiber bundle; one end of the optical fiber bundle is connected to the laser generator, and the other end of the optical fiber bundle is wrapped around the outside of the welding assembly and respectively connected to the radial outer ends of the several welding heads, and the optical fiber bundle is used to transmit the laser generated in the laser generator to the several welding heads to weld the weld of the workpiece to be welded.

[0009] Optionally, the rotating assembly may include a motor, a first gear and a first rack, the first rack being fixedly connected to the welding head bracket, the first gear being connected to the output end of the motor and meshing with the first rack, the motor being able to drive the first gear to rotate, and driving the welding head bracket to rotate through the meshing of the first gear and the first rack.

[0010] Optionally, a second gear may be provided on the outer wall of the several welding heads, and a second rack may be provided on the welding head bracket. The second gear is meshed with the second rack. By rotating the second rack, the welding head can be driven to rotate around its own axis to adjust the radial position of the welding head to adapt to the weld of the workpiece to be welded.

[0011] Optionally, the bearing assembly may include a first bearing member and a second bearing member respectively installed on both sides of the welding assembly, and a plurality of balls are installed on the inner walls of the first bearing member and the second bearing member. The plurality of balls are arranged side by side along the axial direction of the first bearing member and the second bearing member, and the balls are used to reduce the friction resistance between the workpiece to be welded and the bearing assembly.

[0012] 4. The repairing kit for automotive dents, according to claim 1, wherein the two trackbacks are connected along the path of the bolt, and the bolt has a cutout that is adapted to move the bolt out of the way and into the movement of the bolt.

[0013] Optionally, the welding machine may further include a workbench, a fixed seat and a column, the welding assembly, the rotating assembly and the bearing assembly are all installed on the upper end of the fixed seat, and the laser generator is installed on the upper end of the column; the column and the fixed seat are both installed on the table top of the workbench and are spaced apart from each other.

[0014] Optionally, the welding machine may further include a dust removal assembly, which includes a dust collector, a ventilation duct and a dust suction head. The dust collector is installed under the table top of the workbench, and the dust suction head is arranged under the welding assembly. The two ends of the ventilation duct are respectively connected to the dust collector and the dust suction head; the dust suction head can suck the welding smoke generated by the welding assembly into the dust collector through the ventilation duct for treatment.

[0015] Optionally, the first carrier and the second carrier can be tilted, and the tilting direction and tilting angle are the same, so that after the limiting assembly releases the workpiece to be welded, the workpiece to be welded can slide out of the first carrier and the second carrier by itself.

[0016] On the other hand, the present invention provides a super austenitic stainless steel welding process, which can use the super austenitic stainless steel automatic welding machine as described above, and the welding process may include selecting an adapted bearing assembly according to the size of the workpiece to be welded, placing the workpiece to be welded in the bearing assembly and fixing it, adjusting the position of the welding head so that it is focused on the weld of the workpiece to be welded; starting the welding machine so that the several welding heads simultaneously weld the weld of the workpiece to be welded, and at the same time, the rotating assembly drives the welding head to move circumferentially along the weld to complete welding fusion; after welding, the workpiece to be welded is removed from the bearing assembly.

[0017] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0018] 1. The present invention can make multiple groups of laser beams move at high speed along the contour of the welded part through the cooperation of the surrounding welding head and the rotating assembly, so that the weld seam of the entire welded part can be welded and fused almost synchronously, effectively shortening the welding processing time of S31254 super austenitic stainless steel, improving the welding efficiency, and facilitating large-scale production;

[0019] 2. The bearing assembly of the present invention adopts modular design and can be detachably installed, so it can be replaced and installed conveniently and quickly, effectively expanding the application scope of welding processing, and is flexible and convenient to use, and has strong practicality;

[0020] 3. The present invention can synchronously adjust the lens barrel positions of multiple welding heads by providing annular racks and gears, thereby realizing rapid adjustment of the laser welding focal length, effectively reducing the adjustment time and improving the processing efficiency;

[0021] 4. The present invention is designed with a dust removal component, which can quickly absorb and remove the mixed smoke generated during the laser welding process, achieve strong dust suction and efficient purification, facilitate the cleaning and maintenance of the equipment and the environment, and effectively extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects and / or features of the present invention will become more apparent through the following description in conjunction with the accompanying drawings, in which:

[0023] Figure 1 The overall structure diagram of a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention is shown.

[0024] Figure 2 The assembly structure diagram of the workbench, the fixed seat, the bearing assembly, the welding assembly and the rotating assembly in the super austenitic stainless steel automatic welding machine according to the exemplary embodiment of the present invention is shown.

[0025] Figure 3 A structural diagram showing a welding assembly in a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention.

[0026] Figure 4 The figure shows the assembly structure of the welding assembly and the rotating assembly in the super austenitic stainless steel automatic welding machine according to the exemplary embodiment of the present invention.

[0027] Figure 5 A structural diagram showing a bearing assembly in a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention.

[0028] Figure 6 The assembly structure diagram of the first fixed block, the limiting rod and the pressing plate in the limiting assembly of the super austenitic stainless steel automatic welding machine according to the exemplary embodiment of the present invention is shown.

[0029] Figure 7 The assembly structure diagram of the second fixed block, the sliding rod, the push plate and the elastic member in the limiting assembly of the super austenitic stainless steel automatic welding machine according to the exemplary embodiment of the present invention is shown.

[0030] Figure 8 A schematic diagram showing the meshing of a second gear and a second rack in a welding assembly of a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention is shown.

[0031] Fig. 9 An assembly structure diagram of a workbench and a dust removal component of a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention is shown.

[0032] Description of reference numerals:

[0033] 1. Welding assembly, 11. Welding head bracket, 12. Welding head, 13. Second gear, 14. Second rack, 2. Rotating assembly, 21. Motor, 22. First gear, 23. First rack, 3. Bearing assembly, 31. First bearing member, 32. Second bearing member, 33. Ball, 4. Laser generator, 5. Fiber optic bundle, 6. Limiting assembly, 61. First fixed block, 62. Limiting rod, 63. Pressing plate, 64. Second fixed block, 65. Sliding rod, 66. Pushing plate, 67. Elastic member, 7. Dust removal assembly, 71. Dust collector, 72. Ventilation duct, 73. Dust suction head, 8. Workbench, 9. Fixed seat, 10. Column, a. Workpiece to be welded. DETAILED DESCRIPTION

[0034] Hereinafter, a super austenitic stainless steel automatic welding machine and a welding process of the present invention will be described in detail in conjunction with exemplary embodiments.

[0035] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the related technology, stainless steel welding equipment passes the welding gun along the gap between two parts, and uses high temperature to melt the metal in the gap, forming a molten pool between the two parts. The molten metal gradually cools and solidifies to form a weld, and connects the metal parts on both sides of the molten pool. The welding adopts a sequential welding process, and the parts and the laser beam move relative to each other. The melting of the welds needs to be carried out in sequence, which takes a long time and is not conducive to large-scale production.

[0039] Based on this, the present invention provides a super austenitic stainless steel automatic welding machine, which includes a welding assembly, a rotating assembly and a bearing assembly, wherein the welding assembly includes a welding head bracket and a plurality of welding heads distributed circumferentially on the welding head bracket, each welding head is arranged along the radial direction of the welding head bracket, and the radial inner end of each welding head can be adjusted to the weld of the workpiece to be welded to weld the weld; the rotating assembly is arranged on one side of the welding head bracket, and the rotating assembly can rotate the welding head bracket to drive the plurality of welding heads to move synchronously along the circumferential direction to complete the welding of the weld; the bearing assembly is arranged on both sides of the welding assembly for placing the workpiece to be welded, and the bearing assembly can place the weld of the workpiece to be welded in the welding assembly and align it with the welding head to facilitate the welding of the weld by the welding head.

[0040] The present invention can make multiple groups of laser beams move at high speed along the contour of the welded part through the cooperation of the welding head and the rotating assembly arranged in a surrounding manner, so that the weld seam of the entire welded part can be welded and fused almost synchronously, effectively shortening the welding processing time of S31254 super austenitic stainless steel, improving the welding efficiency, and facilitating large-scale production; the bearing assembly of the present invention adopts a modular design and can be detachably installed, and can be easily and quickly replaced and installed, effectively expanding the application scope of welding processing, and is flexible and convenient to use, and has strong practicality; the present invention can synchronously adjust the lens barrel position of multiple groups of welding heads by providing annular racks and gears, thereby realizing rapid adjustment of the laser welding focal length, effectively reducing the adjustment time, and improving the processing efficiency; the present invention is designed with a dust removal assembly, which can quickly absorb and remove the mixed smoke generated in the laser welding process, realize strong dust suction and efficient purification, facilitate the cleaning and maintenance of the equipment and the environment, and effectively extend the service life of the equipment.

[0041] Exemplary Embodiment 1

[0042] The present exemplary embodiment provides a super austenitic stainless steel automatic welding machine.

[0043] Figure 1 The overall structure diagram of the super austenite stainless steel automatic welding machine according to the exemplary embodiment of the present invention is shown; Figure 2 The assembly structure diagram of the workbench, the fixed seat, the bearing assembly, the welding assembly, and the rotating assembly in the super austenitic stainless steel automatic welding machine according to the exemplary embodiment of the present invention is shown; Figure 3 A structural diagram showing a welding assembly in a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention; Figure 4 An assembly structure diagram of a welding assembly and a rotating assembly in a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention is shown; Figure 5 A structural diagram showing a bearing assembly in a super austenite stainless steel automatic welding machine according to an exemplary embodiment of the present invention; Figure 6 An assembly structure diagram of a first fixed block, a limiting rod and a pressing plate in a limiting assembly of a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention is shown; Figure 7 An assembly structure diagram showing a second fixed block, a slide bar, a push plate and an elastic member in a position limiting assembly of a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention;

[0044] Figure 8 A schematic diagram showing the meshing of a second gear and a second rack in a welding assembly of a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention; Fig. 9 An assembly structure diagram of a workbench and a dust removal component of a super austenitic stainless steel automatic welding machine according to an exemplary embodiment of the present invention is shown.

[0045] like Figures 1 to 9As shown in , the super austenitic stainless steel automatic welding machine described in this exemplary embodiment may include a welding assembly 1, a rotating assembly 2 and a bearing assembly 3, wherein the welding assembly 1 may include a welding head bracket 11 and a plurality of welding heads 12, specifically, the number of the welding heads 12 may be 8, and the 8 welding heads 12 may be distributed on the welding head bracket 11 along the circumference of the welding head bracket 11, and each welding head 12 may be arranged along the radial direction of the welding head bracket 11, that is, the radial inner end of the welding head 12 may point to the center position of the welding head bracket 11, and the radial position of each welding head 12 may be adjusted so that the radial inner end of the welding head 12 is placed at the weld of the workpiece a to be welded , so that the welding head 12 can perform welding operations on the weld; the rotating component 2 is installed on one side of the welding head bracket 11, which can drive the welding head bracket 11 and the welding head 12 installed on the welding head bracket 11 to rotate, so that the 8 welding heads 12 move synchronously along the circumferential direction, thereby realizing the welding of the weld of the workpiece a to be welded; the supporting component 3 is installed on both sides of the welding component 1, and the workpiece a to be welded can be placed therein, and the weld is placed at the center of the welding component 1, so that the welding head 12 is aligned with the weld, so that the welding head 12 can weld the weld; but the present invention is not limited to this, the number of welding heads 12 can also be any other number, and the present invention does not make specific limitations on this.

[0046] In this embodiment, the rotating component 2 may include a motor 21, a first gear 22 and a first rack 23. The first rack 23 is installed on one side of the welding head bracket 11. The first gear 22 is connected to the output end of the motor 21 and meshes with the first rack 23. When the motor drives the first gear 22 to rotate, it can also drive the welding head bracket 11 to rotate by utilizing the meshing relationship between the first gear 22 and the first rack 23, so as to realize the movement of the welding head 12 along the direction of the weld, thereby completing the welding process of the welding head 12 on the weld; specifically, the structure of the first rack 23 may be an arc-shaped rack, and the arc angle of the arc-shaped rack should be at least twice the angle between two adjacent welding heads 12, and also That is to say, when the number of welding heads 12 is 8 and the 8 welding heads 12 are evenly distributed on the welding head bracket 11 along the circumferential direction, the angle between two adjacent welding heads 12 is 45 degrees. At this time, the angle of the arc rack should be at least 90 degrees to ensure that after the first gear 22 moves from one end of the arc rack to the other end, the 8 welding heads 12 move synchronously to completely cover the weld of the workpiece a to be welded for one circle, thereby completing the welding of the weld; the initial position of the first gear 22 can be located in the middle position of the arc rack; but the present invention is not limited to this, and the arc rack can also be other angles, as long as it is greater than or equal to the angle between two adjacent welding heads 12 on the welding head bracket 11, and the present invention does not make specific limitations on this.

[0047] Optionally, the structure of the welding head bracket 11 can be annular, and may include an outer annular portion and a middle cross-shaped connecting frame portion; a second gear 13 can be installed on the outer wall of each welding head 12, and a second rack 14 can be provided on the welding head bracket 11, and each second gear 13 can be meshed with the second rack 14. Specifically, the second rack 14 can be an annular rack. When the annular rack rotates, each welding head 12 can be driven to rotate around its own axis through the second gear 13, thereby realizing synchronous adjustment of the radial position of each welding head 12, and adjusting the radial inner end of the welding head 12 to the weld position of the workpiece a to be welded, adapting to the weld, so as to facilitate the welding operation.

[0048] In this embodiment, the bearing assembly 3 can be modularly designed and can include a first bearing member 31, a second bearing member 32 and a ball bearing 33, wherein the first bearing member 31 and the second bearing member 32 can be respectively installed on both sides of the welding assembly 1, that is, when the workpiece a to be welded is placed in the bearing assembly 3, the workpiece a to be welded can pass through the central hole of the welding head bracket 11, and the weld on the workpiece a to be welded is aligned with the welding head 12, so as to facilitate the welding operation; the modularly designed first bearing member 31 and the second bearing member 32 can be fitted with the outer surface of the workpiece a to be welded; the bottom of the side walls of the first bearing member 31 and the second bearing member 32 are both installed with a plurality of ball bearings 33, specifically, the ball bearings 33 can be There are multiple balls 33, which are arranged side by side along the axial direction of the first carrier 31 and the second carrier 32. The ball 33 can reduce the sliding friction of the workpiece a to be welded in the first carrier 31 and the second carrier 32, which is more conducive to the axial movement of the workpiece a to be welded in the first carrier 31 and the second carrier 32, and it is easier to align the weld on the workpiece a to be welded with the welding head 12, and it is also convenient to put the workpiece a to be welded into and take it out of the bearing assembly 3; however, the present invention is not limited to this, and rollers or other components can also be used instead of the ball 33, as long as the same function of reducing the sliding friction between the workpiece a to be welded and the first carrier 31 and the second carrier 32 can be achieved, and the present invention does not make specific limitations on this.

[0049] Preferably, the first carrier 31 and the second carrier 32 can be semicircular arc plates, and the inner diameter size of which can be adaptively selected according to the actual size of the workpiece to be welded, so that the first carrier 31 and the second carrier 32 can be matched with the workpiece to be welded, that is, the inner walls of the first carrier 31 and the second carrier 32 can be fitted with the outer walls of the workpiece to be welded.

[0050] In the present embodiment, the super austenitic stainless steel automatic welding machine may further include a limiting assembly 6, which is mounted on the bearing assembly 3. The limiting assembly 6 may include a first fixed block 61, a limiting rod 62, a pressure plate 63, a second fixed block 64, a sliding rod 65, a push plate 66 and an elastic member 67, wherein the first fixed block 61 is mounted on the lower end of the second bearing member 32, and the limiting rod 62 may be shaped as a U-shaped rod with different lengths at both ends, and its longer end may pass through the first fixed block 61 and be connected to the first fixed block 61 by a thread. Specifically, a nut is provided on the first fixed block 61, and the nut may rotate freely on the first fixed block 61, and the longer end of the limiting rod 62 may pass through the nut, and the axial position of the limiting rod 62 may be adjusted by rotating the nut; the pressure plate 63 is mounted on the shorter end of the limiting rod 62, and the pressure plate 63 may be against the end of the workpiece a to be welded, that is, the axial position of the workpiece a to be welded in the bearing assembly 3 may be adjusted by rotating the nut on the first fixed block 61, when the first bearing member 31 and the second bearing member 32 are connected. 32 is tilted and the first carrier 31 is higher than the second carrier 32, the pressure plate 63 can prevent the workpiece a to be welded from sliding off the carrier assembly 3; the second fixed block 64 is installed at the lower end of the first carrier 31, one end of the slide rod 65 can pass through the second fixed block 64, and the other end can be fixedly installed with a push plate 66, the slide rod 65 can slide in the second fixed block 64 so that the push plate 66 can move axially, the elastic member 67 can be sleeved on the slide rod 65 and its two ends are respectively fixedly connected to the push plate 66 and the second fixed block 64, when When the workpiece a to be welded is installed in the supporting assembly 3, the push plate 66 can rely on the elastic force of the elastic member 67 to press against the end of the workpiece a to be welded, and clamp the workpiece a to be welded between the push plate 66 and the pressure plate 63, thereby achieving the clamping and fixation of the workpiece a to be welded in the supporting assembly 3. Specifically, the number of sliding rods 65 and the number of elastic members 67 can both be 2; but the present invention is not limited to this, the number of sliding rods 65 can also be any other number, and the number of elastic members 67 can be consistent with the number of sliding rods 65, and the present invention does not make specific limitations on this.

[0051] Optionally, the first carrier 31 and the second carrier 32 can be arranged at an angle. Specifically, the end of the first carrier 31 at the push plate 66 can be rotated upward by a certain angle, and the end of the second carrier 32 at the pressure plate 63 can be rotated downward by the same angle, so that the inclination direction and the inclination angle of the first carrier 31 and the second carrier 32 are consistent. When the welding is completed and the limit assembly 6 is released, the workpiece a to be welded can slide out of the first carrier 31 and the second carrier 32 by itself; however, the present invention is not limited to this. The first carrier 31 and the second carrier 32 can also be tilted in another direction, as long as the inclination direction and the inclination angle are consistent. The present invention does not make specific limitations on this.

[0052] In this embodiment, the super austenitic stainless steel automatic welding machine may further include a laser generator 4 and an optical fiber bundle 5, one end of the optical fiber bundle 5 may be connected to the laser generator 4, the other end may form an annular structure and surround the outside of the welding assembly 1, and its end may be connected to the radial outer end of the welding head 12, specifically, the optical fiber bundle 5 may be divided into 8 optical fibers, and the 8 optical fibers are respectively connected to the radial outer ends of the 8 welding heads 12, so that the laser generated by the laser generator 4 can be transmitted to each welding head 12 by the optical fiber, so that all welding heads 12 can weld the weld; however, the present invention is not limited to this, and the number of optical fibers included in the optical fiber bundle 5 may also be any other number, as long as it is consistent with the number of welding heads 12 and corresponds one to one, and the present invention does not make specific limitations on this.

[0053] In this embodiment, the super austenitic stainless steel automatic welding machine may also include a workbench 8, a fixed seat 9 and a column 10. The fixed seat 9 and the column 10 are both installed on the table top of the workbench 8 and are spaced apart from each other; the welding assembly 1, the rotating assembly 2 and the bearing assembly 3 can all be installed on the fixed seat 9 and are all located at the upper end of the fixed seat 9. The laser generator 4 can be installed at the upper end of the column 10 and connected to the welding assembly 1 through the optical fiber bundle 5; however, the present invention is not limited to this. The various components and modules installed on the workbench 8 can also be connected to the workbench through other forms of connectors, and the positional relationship between them can also be adjusted according to actual needs. The present invention does not make specific limitations on this.

[0054] In the present embodiment, the super austenitic stainless steel automatic welding machine may further include a dust removal assembly 7, which may include a dust collector 71, a ventilation duct 72 and a dust suction head 73, wherein the dust collector 71 may be installed in the workbench 8, that is, located below the table top of the workbench 8, one end of the ventilation duct 72 may be connected to the dust collector 71, and the other end may extend to the table top of the workbench 8 and be connected to the dust suction head 73, specifically, the dust suction head 73 may be a hollow inverted trapezoidal shape with a large top and a small bottom, and the dust suction head 73 may be arranged below the welding assembly 1, and the dust suction head 73 may suck the welding smoke generated in the welding assembly 1 into the dust collector 71 through the ventilation duct 72, and the dust collector 71 then performs environmental protection treatment on the sucked smoke to avoid the smoke generated by the welding assembly 1 from being directly discharged into the atmosphere to pollute the environment; however, the present invention is not limited to this, and the components included in the dust removal assembly 7 may also be other components, as long as the collection and treatment of welding smoke can be achieved, the present invention does not make specific limitations on this.

[0055] The working process of the super austenitic stainless steel automatic welding machine described in this exemplary embodiment is described in detail as follows:

[0056] Before welding the workpiece a to be welded, a suitable bearing assembly 3 can be installed according to the size of the workpiece, and the first bearing member 31 and the second bearing member 32 can be fixed on the fixing seat 9 by bolts. The modularly designed first bearing member 31 and the second bearing member 32 can fit with the outer surface of the workpiece, and the workpiece can slide out along the inclined direction of the first bearing member 31 and the second bearing member 32 under the action of its own gravity. When the workpiece moves in the first bearing member 31 and the second bearing member 32, the ball 33 can roll under the influence of friction, thereby reducing the friction resistance received by the workpiece when it moves, and facilitating the position adjustment and placement and removal of the workpiece.

[0057] When it is necessary to clamp and fix the workpiece a to be welded, first place the workpiece to be welded on the second carrier 32, rotate the nut on the first fixing block 61, drive the limiting rod 62 to move axially, and the pressure plate 63 at the end of the limiting rod 62 pushes the workpiece a to be welded to slide along the second carrier 32, so that the upper end of the workpiece a to be welded moves to the welding processing position and is aligned with the welding head 12. At this time, the limiting rod 62 is restricted by the internal thread of the nut on the first fixing block 61 and cannot slide. Then, the push plate 66 is pulled to stretch the elastic member 67, and the other workpiece to be welded is placed in the first carrier 31. After placing it, the push plate 66 is released, and the sliding rod 65 moves along the direction of the second fixing block 64 under the resetting action of the elastic member 67. The push plate 66 then drives the workpiece to slide along the first carrier 31. After the push plate 66 pushes the workpiece to the welding processing position, the two workpieces contact and are clamped and fixed between the push plate 66 and the pressure plate 63, and the weld profile is at the welding processing position and aligned with the welding head 12.

[0058] When it is necessary to process workpieces of S31254 super austenitic stainless steel of different diameters, after replacing and installing the corresponding bearing assembly 3, the second gear 13 on all welding heads 12 can be driven to rotate synchronously by rotating the second rack 14, and the second gear 13 drives the welding head 12 to rotate, so as to adjust the radial position of the welding head 12 on the welding head bracket 11, so that the focal lengths of multiple groups of welding heads 12 distributed equally are synchronously adjusted to concentric circles of another diameter, which are adapted to the weld position of the workpiece to be welded subsequently.

[0059] When it is necessary to perform welding processing on S31254 super austenitic stainless steel, the workpiece a to be welded is fixed on the bearing assembly 3, the second rack 14 is rotated to drive the welding head 12 to move, the focal length of the welding head 12 is adjusted to the weld seam of the workpiece a to be welded, and then the laser generator 4 is started to transmit the laser along the optical fiber bundle 5 to multiple welding heads 12 evenly distributed in the circumferential direction of the welding head bracket 11, and the high-energy-density laser beam quickly and locally heats the weldable seam, and the rotating assembly 2 drives the welding head 12 to rotate at high speed around the workpiece a to be welded, so as to achieve rapid welding and fusion of the weld seam, thereby effectively reducing the welding processing time and improving the welding efficiency.

[0060] When laser welding the S31254 super austenitic stainless steel workpiece, the motor 21 starts working synchronously, and the output shaft of the motor 21 rotates to drive the coaxially connected first gear 22 to rotate, and the first rack 23 meshing with the first gear 22 is forced to rotate, driving the welding head bracket 11 to rotate synchronously, and the equally distributed welding heads 12 rotate at high speed around the workpiece, and move to the initial position of the adjacent welding head 12 with the rotation of the first rack 23. The welding trajectory can achieve full coverage of the weld contour. After the workpiece welding and fusion are completed, the laser generator 4 is turned off, and the motor 21 reverses to drive the first rack 23 to reset and then stops working, and then the welded workpiece can be taken out.

[0061] When laser welding S31254 super austenitic stainless steel, the centrifugal fan in the dust collector 71 can be controlled to work, generating wind to pull the smoke, and the dust suction head 73 attracts the smoke along the ventilation duct 72 to the inside of the dust collector 71, so as to prevent the smoke from spreading and causing harm to the health of the workers, protect the laser precision parts from the influence of smoke, and extend the service life of the equipment.

[0062] Exemplary Embodiment 2

[0063] The present exemplary embodiment provides a super austenitic stainless steel welding process.

[0064] The super austenitic stainless steel welding process described in this exemplary embodiment can be performed using the super austenitic stainless steel automatic welding machine described in exemplary embodiment 1.

[0065] like Figures 1 to 9 As shown in , the super austenitic stainless steel welding process described in this exemplary embodiment may include the following steps:

[0066] S1: Install a corresponding bearing assembly 3 according to the size of the workpiece a to be welded;

[0067] S2: placing the workpiece a to be welded into the inclined first carrier 31 and the second carrier 32, and moving the workpiece a to be welded to the welding position through the limiting assembly 6 for clamping and fixing;

[0068] S3: adjusting the radial position of the welding head 12 by rotating the second rack 14 so that the welding head 12 is focused on the welding seam position of the workpiece a to be welded;

[0069] S4: Start the laser generator 4 and the motor 21 to work, so that the multiple welding heads 12 simultaneously weld the weld seam of the workpiece a to be welded, and at the same time, the motor 21 drives the welding heads 12 to move at high speed along the circumferential contour of the weld seam to quickly complete the welding fusion;

[0070] S5: Start the dust collector 71 to suck out the smoke generated during the welding process and collect and process it;

[0071] S6: After the welding is completed, the limiting rod 62 is twisted to loosen the limiting assembly 6, so that the welded workpiece slides down along the first supporting member 31 and the second supporting member 32 and is taken out.

[0072] In summary, the present invention can make multiple groups of laser beams move at high speed along the contour of the welded part through the cooperation of the surrounding welding head and rotating components, so that the weld seam of the entire welded part can be welded and fused almost synchronously, effectively shortening the welding processing time of S31254 super austenitic stainless steel, improving welding efficiency, and facilitating large-scale production; the bearing component of the present invention adopts modular design and detachable installation, which can be easily and quickly replaced and installed, effectively expanding the application scope of welding processing, and is flexible and convenient to use, and has strong practicality; the present invention is provided with annular racks and gears, so that the lens barrel positions of multiple groups of welding heads can be adjusted synchronously, thereby realizing rapid adjustment of the laser welding focal length, which can effectively reduce the adjustment time and improve the processing efficiency; the present invention is designed with a dust removal component, which can quickly absorb and remove the mixed smoke generated during laser welding, realize strong dust suction and efficient purification, facilitate the cleaning and maintenance of equipment and environment, and effectively extend the service life of the equipment.

[0073] Although the present invention has been described above in conjunction with the exemplary embodiments and the accompanying drawings, it should be apparent to those skilled in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.

Claims

1. A super austenitic stainless steel automatic welding machine, characterized in that: The welding machine comprises a welding assembly, a rotating assembly and a bearing assembly, wherein: The welding assembly includes a welding head support and a plurality of welding heads distributed on the welding head support along the circumferential direction, each welding head is arranged along the radial direction of the welding head support, and the radial inner end of each welding head can be adjusted to the weld seam of the workpiece to be welded so as to weld the weld seam; The rotating assembly is arranged on one side of the welding head bracket, and the rotating assembly can rotate the welding head bracket to drive a plurality of welding heads to move synchronously along the circumferential direction to complete the welding of the weld; The bearing components are arranged on both sides of the welding component for placing the workpieces to be welded. The bearing components can place the weld of the workpieces to be welded in the welding component and align it with the welding head so that the welding head can weld the weld.

2. The super austenitic stainless steel automatic welding machine according to claim 1, characterized in that: The welding machine also includes a laser generator and an optical fiber bundle; one end of the optical fiber bundle is connected to the laser generator, and the other end of the optical fiber bundle is surrounded by the outside of the welding assembly and is respectively connected to the radial outer ends of the several welding heads. The optical fiber bundle is used to transmit the laser generated in the laser generator to the several welding heads to weld the weld of the workpiece to be welded.

3. The super austenitic stainless steel automatic welding machine according to claim 1, characterized in that: The rotating assembly includes a motor, a first gear and a first rack. The first rack is fixedly connected to the welding head bracket. The first gear is connected to the output end of the motor and meshes with the first rack. The motor can drive the first gear to rotate, and drive the welding head bracket to rotate through the meshing of the first gear and the first rack.

4. The super austenitic stainless steel automatic welding machine according to claim 1, characterized in that: A second gear is provided on the outer wall of the several welding heads, and a second rack is provided on the welding head bracket. The second gear is meshed with the second rack. By rotating the second rack, the welding head can be driven to rotate around its own axis to adjust the radial position of the welding head to adapt to the weld of the workpiece to be welded.

5. The super austenitic stainless steel automatic welding machine according to claim 1, characterized in that: The bearing assembly includes a first bearing member and a second bearing member respectively installed on both sides of the welding assembly, and a plurality of balls are installed on the inner walls of the first bearing member and the second bearing member. The plurality of balls are arranged side by side along the axial direction of the first bearing member and the second bearing member, and the balls are used to reduce the friction resistance between the workpiece to be welded and the bearing assembly.

6. The super austenitic stainless steel automatic welding machine according to claim 5, characterized in that: The welding machine also includes a limit assembly, which is connected to the bearing assembly, and the limit assembly includes a first fixed block, a second fixed block, a limit rod, a sliding rod, a pressure plate, a push plate and an elastic member, wherein the first fixed block is fixedly connected to the bearing assembly, one end of the limit rod passes through the first fixed block and is threadedly connected to the first fixed block, and the pressure plate is installed at the other end of the limit rod, and the pressure plate can abut against one end of the workpiece to be welded to prevent the workpiece to be welded from moving in the bearing assembly; the second fixed block is fixedly connected to the bearing assembly, one end of the sliding rod passes through the second fixed block and is slidably connected to the second fixed block, and the other end of the sliding rod is fixedly connected to the push plate, the elastic member is sleeved on the sliding rod, and both ends of the elastic member are fixedly connected to the second fixed block and the push plate respectively, and the push plate can abut against the other end of the workpiece to be welded under the action of the elastic member, so as to clamp the workpiece to be welded between the push plate and the pressure plate.

7. The super austenitic stainless steel automatic welding machine according to claim 2, characterized in that: The welding machine also includes a workbench, a fixed seat and a column. The welding assembly, the rotating assembly and the bearing assembly are all installed on the upper end of the fixed seat, and the laser generator is installed on the upper end of the column; the column and the fixed seat are both installed on the table top of the workbench and are spaced apart from each other.

8. The super austenitic stainless steel automatic welding machine according to claim 7, characterized in that: The welding machine also includes a dust removal component, which includes a dust collector, a ventilation duct and a dust suction head. The dust collector is installed below the table top of the workbench, and the dust suction head is arranged below the welding component. The two ends of the ventilation duct are respectively connected to the dust collector and the dust suction head; the dust suction head can suck the welding smoke generated by the welding assembly into the dust collector through the ventilation duct for treatment.

9. The super austenitic stainless steel automatic welding machine according to claim 6, characterized in that: The first bearing member and the second bearing member are both tilted, and the tilting direction and tilting angle are the same, so that after the limiting assembly releases the workpiece to be welded, the workpiece to be welded can slide out of the first bearing member and the second bearing member by itself.

10. A super austenitic stainless steel welding process, characterized in that: The welding process adopts the super austenitic stainless steel automatic welding machine as described in any one of claims 1 to 9, and the welding process includes selecting the suitable bearing assembly according to the size of the workpiece to be welded, placing the workpiece to be welded in the bearing assembly and fixing it, adjusting the position of the welding head so that it is focused on the weld of the workpiece to be welded; starting the welding machine so that the several welding heads weld the weld of the workpiece to be welded at the same time, and at the same time, the rotating assembly drives the welding head to move circumferentially along the weld to complete welding fusion; after welding, the workpiece to be welded is removed from the bearing assembly.

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