Water curtain cooling stainless steel pipe intelligent laser welding device and method

Abstract

The invention relates to the technical field of laser welding, in particular to a water curtain cooling stainless steel pipe intelligent laser welding device which comprises a machine body, and a welding mechanism is arranged on the machine body and used for stainless steel pipe welding machining. The water curtain assembly comprises a lower ring frame fixed to the outer wall of the lower end of the laser welding device, L-shaped supports are pivoted to the outer walls of the left end and the right end of the lower ring frame, round sleeves are fixed to the outer ends of the L-shaped supports, nozzles are installed in the round sleeves in a penetrating mode, an upper ring frame is fixed to the outer wall of the upper end of the laser welding device, and first air cylinders are pivoted to the outer walls of the left end and the right end of the upper ring frame. The lower output end of the first cylinder is pivoted with the upper end of the L-shaped bracket; the welding seam is precisely covered and rapidly cooled through the dynamically adjusted flat water curtain, the intergranular corrosion tendency is remarkably restrained, welding deformation is reduced, meanwhile, air is isolated to improve surface oxidation, and the corrosion resistance, the size precision and the appearance quality of a connector are comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, specifically to a water-curtain-cooled intelligent laser welding device and method for stainless steel pipes. Background Technology

[0002] Stainless steel pipes are widely used in food industry, medical devices, chemical pipelines, building decoration and high-end equipment manufacturing due to their excellent corrosion resistance, good mechanical properties and beautiful surface characteristics. According to CN120205998B, a laser welding device and method for stainless steel pipes are disclosed. This technology discloses that "by switching the feeding component, the clamping component can be rotated, so that the clamping components can switch positions, thereby switching the positions of the stainless steel pipes, thus satisfying the continuous feeding operation of the stainless steel pipes. At the same time, the switching of the feeding component also drives the transmission component to rotate, so that the transmission component can drive the vacuum gripping component to rotate. By rotating and switching the position of the vacuum suction cup, the stainless steel pipe baffle is aligned with the stainless steel pipe. The electric push rod, in conjunction with the vacuum suction cup, can complete the gripping of the stainless steel pipe baffle and realize the docking with the stainless steel pipe, thereby facilitating contact welding and sealing operations. This method realizes automated continuous feeding operations, thereby improving welding and sealing efficiency. Moreover, the automatic material ejection component can automatically replenish material to fill the material gap after the stainless steel pipe baffle is removed." In current laser welding processes for stainless steel pipes, the weld area remains at a high temperature and is continuously exposed to air after welding. This causes the stainless steel material to remain in the sensitization temperature range for an excessively long time, leading to the precipitation of large amounts of carbides along grain boundaries and resulting in severe intergranular corrosion susceptibility. Simultaneously, oxidation occurs in the high-temperature area upon contact with air, forming an unevenly colored oxide layer on the weld surface, affecting not only aesthetics but also corrosion resistance. Furthermore, uneven cooling leads to an imbalance in welding stress distribution, causing uncontrollable deformation of the pipe fittings and directly impacting the product's dimensional accuracy and structural stability. The root cause of these problems lies in the lack of a dynamic and controllable cooling method that can follow the welding heat source in real time, precisely cover the high-temperature area, and achieve efficient heat exchange. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a water-curtain-cooled intelligent laser welding device and method for stainless steel pipes. By using a dynamically adjustable flat water curtain to precisely cover and rapidly cool the weld seam, it significantly suppresses intergranular corrosion tendency and reduces welding deformation. At the same time, it isolates air to improve surface oxidation, comprehensively enhancing the corrosion resistance, dimensional accuracy, and appearance quality of the joint.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a water-curtain cooled intelligent laser welding device for stainless steel pipes, comprising a body, wherein a welding mechanism is provided on the body for welding stainless steel pipes, and the welding mechanism includes: The main components include a laser welder mounted on the body; The water curtain assembly includes a lower ring frame fixed to the lower outer wall of the laser welder. L-shaped brackets are pivotally connected to the outer walls of both the left and right ends of the lower ring frame. A round sleeve is fixed to the outer end of the L-shaped bracket, and a nozzle is installed through the round sleeve. An upper ring frame is fixed to the upper outer wall of the laser welder. A first cylinder is pivotally connected to the outer walls of both the left and right ends of the upper ring frame, and the lower output end of the first cylinder is pivotally connected to the upper end of the L-shaped bracket. The positioning and rotating assembly is located at the front of the machine body and is used for positioning and rotating the stainless steel tube.

[0005] Preferably, the positioning and rotating assembly includes a frame disposed at the front of the machine body, a slotted platform fixed at the upper end of the frame, a left shaft seat and a right shaft seat fixed at the left and right ends of the slotted platform respectively, a left support roller and a right support roller rotatably mounted on the front and rear sides of the left and right shaft seats respectively, and a water tank fixed inside the frame.

[0006] Preferably, the positioning and rotating assembly further includes a vertical frame fixed on the left and right sides of the front end of the frame, an extension frame fixed on the rear side of the upper end of the vertical frame, a second cylinder installed on the upper end of the extension frame, an upper shaft seat fixed at the lower output end of the second cylinder, and pressure rollers rotatably installed on both the front and rear sides inside the upper shaft seat.

[0007] Preferably, the positioning and rotating assembly further includes a shaft fixed between the left and right support rollers, a first gear fixed at the end of the shaft, a second gear rotatably mounted on the outer wall of the right shaft seat, and the second gear meshing with the first gears on the front and rear sides for transmission, a servo motor mounted on the outer wall of the left shaft seat for driving one of the shafts to rotate, and a protective cover fixed to the outside of the right shaft seat.

[0008] Preferably, the positioning and rotating assembly further includes a secondary shaft seat fixed at both ends of the slot platform, and secondary support rollers are rotatably installed on both the front and rear sides inside the secondary shaft seat.

[0009] Preferably, the main component further includes an X-axis linear guide rail disposed on the upper end of the machine body, a Y-axis linear guide rail disposed on the sliding part of the X-axis linear guide rail, a Z-axis linear guide rail disposed on the sliding part of the Y-axis linear guide rail, and the laser welder is mounted on the sliding part of the Z-axis linear guide rail.

[0010] Preferably, the nozzle has a narrow slit-shaped outlet and is used to spread the cooling water into a flat water curtain.

[0011] This invention also discloses a smart laser welding method for stainless steel pipes with water curtain cooling, specifically including the following steps: S1. First, place the two stainless steel pipes to be welded on the positioning and rotating assembly for positioning and rotation to achieve circumferential seam rotation. S2, then, the position of the laser welder relative to the weld seam is adjusted by the main component and welding is performed; S3. Finally, the relative angle between the nozzle and the weld is adjusted by the water curtain assembly to ensure that the water curtain covers the weld and the heat-affected zone.

[0012] This invention provides a water-curtain-cooled intelligent laser welding device and method for stainless steel pipes. Compared with the prior art, it has the following advantages: 1. When the output end of the first cylinder extends or retracts, it drives the L-shaped bracket pivotally connected to it to swing around the connection point on the lower ring frame, thereby causing the nozzle fixed at the end of the bracket to synchronously change the spray angle; this allows the cooling water curtain ejected from the nozzle to adjust its coverage area in real time according to the welding position, achieving a controllable rapid cooling effect by covering the high-temperature weld and heat-affected zone after laser welding; through dynamic contact cooling, the heat exchange efficiency is significantly improved, effectively suppressing the intergranular corrosion tendency of the stainless steel heat-affected zone and reducing welding deformation. At the same time, the water curtain also isolates air and improves the oxidation of the weld surface, thereby comprehensively improving the corrosion resistance, dimensional accuracy and surface quality of the welded joint.

[0013] 2. When the high-pressure cooling water flows through the internal cavity of the nozzle, it is forcibly constrained and shaped by the special narrow slit-shaped outlet at its end. This structure forces the water flow with a circular cross-section to extend along the length of the narrow slit at the outlet and collapse and aggregate into a continuous flat water curtain with uniform thickness, controllable width, and clear edges.

[0014] 3. Paired left and right support rollers form a stable V-shaped support surface. Combined with a liftable pressure roller mechanism, this achieves rapid and flexible clamping of the workpiece, effectively eliminating axial movement and radial runout of the pipe during rotary welding. A servo motor drives a synchronous gear system, forcing all load-bearing support rollers to rotate synchronously, ensuring uniform pipe rotation speed and consistent trajectory, providing a crucial motion reference for obtaining high-quality continuous circumferential welds. An integrated water tank at the bottom of the frame enables fully enclosed collection and circulation of the cooling medium, embodying an environmentally friendly design concept while ensuring welding quality. This entire component constitutes a reliable and efficient workpiece handling system. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main components in this invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure of part A in the middle; Figure 4This is a schematic diagram of the positioning and rotating assembly in this invention; Figure 5 This is a partial structural schematic diagram of the positioning and rotating component in this invention; Figure 6 This is a schematic diagram of the structure of the slot platform in this invention.

[0016] In the diagram: 1. Machine body; 2. Welding mechanism; 21. Main component; 211. X-axis linear guide; 212. Y-axis linear guide; 213. Z-axis linear guide; 214. Laser welder; 22. Water curtain component; 221. Lower ring frame; 222. L-shaped bracket; 223. Circular sleeve; 224. Nozzle; 225. Upper ring frame; 226. First cylinder; 23. Positioning and rotating component; 231. Frame; 232. Slot platform; 233. Left shaft seat; 234. Left support roller; 235. Right shaft seat; 236. Right support roller; 237. Stand; 238. Extension frame; 239. Second cylinder; 2310. Upper shaft seat; 2311. Pressure roller; 2312. First gear; 2313. Second gear; 2314. Shaft; 2315. Servo motor; 2316. Protective cover; 2317. Sub-shaft seat; 2318. Sub-support roller; 2319. Water tank. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1 - Figure 6 This invention provides a technical solution: a water-curtain cooled intelligent laser welding device for stainless steel pipes, comprising a body 1, on which a welding mechanism 2 is provided for welding stainless steel pipes, the welding mechanism 2 comprising: The main component 21 includes a laser welder 214 mounted on the body 1; The water curtain assembly 22 includes a lower ring frame 221 fixed to the lower outer wall of the laser welder 214. L-shaped brackets 222 are pivotally connected to the outer walls of both the left and right ends of the lower ring frame 221. A round sleeve 223 is fixed to the outer end of the L-shaped bracket 222. A nozzle 224 is installed through the round sleeve 223. An upper ring frame 225 is fixed to the upper outer wall of the laser welder 214. A first cylinder 226 is pivotally connected to the outer walls of both the left and right ends of the upper ring frame 225. The lower output end of the first cylinder 226 is pivotally connected to the upper end of the L-shaped bracket 222. The positioning and rotating component 23 is located at the front of the machine body 1 and is used for positioning and rotating the stainless steel tube.

[0019] In this embodiment, when the output end of the first cylinder 226 extends or retracts, it drives the L-shaped bracket 222 pivotally connected to it to swing around the connection point on the lower ring frame 221, thereby causing the nozzle 224 fixed at the end of the bracket to synchronously change the spray angle. This allows the cooling water curtain ejected from the nozzle 224 to adjust its coverage area in real time according to the welding position. By covering the high-temperature weld and heat-affected zone after laser welding, a controllable rapid cooling effect is achieved. Through dynamic bonding cooling, the heat exchange efficiency is significantly improved, the tendency of intergranular corrosion in the heat-affected zone of stainless steel is effectively suppressed, and welding deformation is reduced. At the same time, the water curtain also isolates air and improves the oxidation of the weld surface, thereby comprehensively improving the corrosion resistance, dimensional accuracy, and surface quality of the welded joint.

[0020] Specifically, the positioning and rotating assembly 23 includes a frame 231 located in front of the body 1. A slot platform 232 is fixed at the upper end of the frame 231. A left shaft seat 233 and a right shaft seat 235 are fixed at the left and right ends of the slot platform 232, respectively. A left support roller 234 and a right support roller 236 are rotatably installed on the front and rear sides of the left shaft seat 233 and the right shaft seat 235, respectively. A water tank 2319 is fixed inside the frame 231.

[0021] In this embodiment, the stainless steel pipe to be welded is placed horizontally on a V-shaped support surface formed by two left support rollers 234 supported by the left shaft seat 233 and two right support rollers 236 supported by the right shaft seat 235, which ensures the radial positioning and self-centering of the pipe.

[0022] Specifically, the positioning and rotating assembly 23 also includes a stand 237 fixed on the left and right sides of the front end of the frame 231. An extension frame 238 is fixed on the rear side of the upper end of the stand 237. A second cylinder 239 is installed on the upper end of the extension frame 238. An upper shaft seat 2310 is fixed at the output end below the second cylinder 239. Pressure rollers 2311 are rotatably installed on both the front and rear sides inside the upper shaft seat 2310.

[0023] In this embodiment, after the stainless steel pipe to be welded is positioned, the piston rod of the second cylinder 239 extends downward, driving the upper shaft seat 2310 fixedly connected to it to descend as a whole, so that the two pressure rollers 2311 installed on the front and rear sides inside the upper shaft seat 2310 press down synchronously, contact the upper outer surface of the pipe and apply a stable positive pressure; to prevent the pipe from axial movement and jumping caused by thermal deformation or slight imbalance during subsequent rotary welding.

[0024] Specifically, the positioning and rotating assembly 23 also includes a shaft 2314 fixed between the left support roller 234 and the right support roller 236. A first gear 2312 is fixed at the end of the shaft 2314. A second gear 2313 is rotatably mounted on the outer wall of the right shaft seat 235, and the second gear 2313 meshes with the first gear 2312 on the front and rear sides for transmission. A servo motor 2315 is mounted on the outer wall of the left shaft seat 233 and is used to drive one of the shafts 2314 to rotate. A protective cover 2316 is fixed to the outside of the right shaft seat 235.

[0025] In this embodiment, after the servo motor 2315 starts, it directly drives the shaft 2314 connected to it and the first gear 2312 fixed at its end to rotate. The first gear 2312 meshes with the second gear 2313 rotatably mounted on the outer wall of the right shaft seat 235. The power is synchronously transmitted through the second gear 2313 to the shaft 2314 on the other side and the first gear 2312 on it, thereby ensuring that the two shafts 2314 and all the left and right support rollers 234 and right support rollers 236 on them achieve strict synchronization and rotation in the same direction. This enables uniform rotation, speed change or fixed-point stop of the stainless steel pipe, perfectly matching the requirements of the laser welding process.

[0026] Specifically, the positioning and rotating assembly 23 also includes a secondary shaft seat 2317 fixed at both ends of the slot platform 232, and secondary support rollers 2318 are rotatably installed on both the front and rear sides inside the secondary shaft seat 2317.

[0027] In this embodiment, when welding a long stainless steel pipe, the overhanging end of the pipe can be stably mounted on these auxiliary support rollers 2318, thereby providing a continuous and smooth auxiliary support surface for the entire pipe.

[0028] Specifically, the main component 21 also includes an X-axis linear guide 211 disposed on the upper end of the body 1, a Y-axis linear guide 212 disposed on the sliding part of the X-axis linear guide 211, a Z-axis linear guide 213 disposed on the sliding part of the Y-axis linear guide 212, and the laser welder 214 is mounted on the sliding part of the Z-axis linear guide 213.

[0029] In this embodiment, through the coordinated linkage of these three linear modules, the laser welder 214 can be quickly and accurately positioned to any target welding point in three-dimensional space, and can accurately execute welding paths of straight lines, curves or complex spatial trajectories according to a preset program.

[0030] Specifically, the nozzle 224 has a narrow slit-shaped outlet and is used to spread the cooling water into a flat water curtain.

[0031] In this embodiment, when the high-pressure cooling water flows through the internal cavity of the nozzle 224, it is forcibly constrained and shaped by the special narrow slit-shaped outlet at its end; this structure forces the water flow with a circular cross-section to extend along the length of the narrow slit at the outlet and collapse and aggregate into a continuous flat water curtain with uniform thickness, controllable width and clear edges.

[0032] This invention also discloses a smart laser welding method for stainless steel pipes with water curtain cooling, specifically including the following steps: S1. First, the two stainless steel pipes to be welded are placed on the positioning and rotating assembly 23 for positioning and rotation to achieve circumferential seam rotation. S2, then, the position of the laser welder 214 relative to the weld is adjusted by the main body component 21 and welding is performed; S3. Finally, the relative angle between the nozzle 224 and the weld is adjusted by the water curtain assembly 22 to ensure that the water curtain covers the weld and the heat-affected zone.

[0033] The working principle and usage process of this invention are as follows: First, the operator places the stainless steel pipe to be welded horizontally on the positioning and rotating assembly 23. Specifically, the pipe is placed on the V-shaped support surface formed by the two left support rollers 234 supported by the left shaft seat 233 and the two right support rollers 236 supported by the right shaft seat 235, completing the initial radial positioning and self-centering. If the pipe to be welded is long, its overhanging end can be simultaneously mounted on the auxiliary support rollers 2318 supported by the auxiliary shaft seats 2317 fixed at both ends of the slot platform 232, thereby providing a continuous and smooth auxiliary support surface for the entire pipe and preventing it from sagging due to its own weight.

[0034] Subsequently, the axial clamping function of the positioning rotation assembly 23 is activated: the piston rod of the second cylinder 239, which is fixed on the left and right uprights 237 at the front end of the frame 231, extends downward and drives the upper shaft seat 2310, which is fixedly connected to it, to descend as a whole. This causes the two pressure rollers 2311 installed on the front and rear sides inside the upper shaft seat 2310 to press down synchronously, contact the upper outer surface of the pipe and apply a stable positive pressure, thereby effectively preventing the pipe from axial movement and jumping during the subsequent rotation welding process.

[0035] Next, the position of the laser welder 214 is adjusted by the main body component 21: the X-axis linear guide 211 set on the upper end of the machine body 1, the Y-axis linear guide 212 set on its sliding part, and the Z-axis linear guide 213 set on the Y-axis sliding part work together to quickly and accurately position the laser welder 214 installed on the sliding part of the Z-axis linear guide 213 to the starting position of the target welding point in three-dimensional space.

[0036] Welding begins, and the servo motor 2315 starts, driving the shaft 2314 connected to it and the first gear 2312 fixed at its end to rotate. The first gear 2312 meshes with the second gear 2313 rotatably mounted on the outer wall of the right shaft seat 235. Power is synchronously transmitted through the second gear 2313 to the shaft 2314 on the other side and the first gear 2312 thereon, thereby ensuring that the two shafts 2314 and all the left and right support rollers 234 mounted on them rotate in strict synchronization and in the same direction, driving the stainless steel pipe to rotate at a uniform speed and forming a continuous annular weld. At the same time, the laser welder 214 emits light to perform welding, and can precisely execute the required welding path according to a preset program through the linkage of three linear modules.

[0037] Simultaneously with welding, the water curtain cooling system operates. The water curtain assembly 22, mounted on the laser welder 214, begins operation: the output end of the first cylinder 226 extends and retracts according to control commands, driving the L-shaped bracket 222, which is pivotally connected to it, to swing around the connection point on the lower ring frame 221. This causes the nozzle 224, fixed inside the circular sleeve 223 at the end of the bracket, to synchronously change its spray angle, aligning it with the weld area. High-pressure cooling water flows through the internal cavity of the nozzle 224 and is forcibly constrained and shaped by its special narrow-slit outlet, forming a continuous, flat water curtain with uniform thickness, controllable width, and clear edges. This flat water curtain adjusts its coverage area in real time according to the welding position, precisely covering the high-temperature weld and heat-affected zone after laser welding, achieving a controllable rapid cooling effect.

[0038] Throughout the process, the cooling water flowing down the surface of the pipe is collected and recycled by the water tank 2319 located directly below the rotating support mechanism and fixed inside the frame 231. Once welding is complete, all moving parts stop and reset in sequence, and the welded workpiece can be removed.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-curtain-cooled intelligent laser welding device for stainless steel pipes, comprising a body (1), characterized in that: The machine body (1) is provided with a welding mechanism (2) for welding stainless steel pipes. The welding mechanism (2) includes: The main component (21) includes a laser welder (214) mounted on the body (1); The water curtain assembly (22) includes a lower ring frame (221) fixed to the lower outer wall of the laser welder (214). L-shaped brackets (222) are pivotally connected to the outer walls of both the left and right ends of the lower ring frame (221). A round sleeve (223) is fixed to the outer end of the L-shaped bracket (222). A nozzle (224) is installed through the inside of the round sleeve (223). An upper ring frame (225) is fixed to the outer wall of the upper end of the laser welder (214). A first cylinder (226) is pivotally connected to the outer walls of both the left and right ends of the upper ring frame (225). The lower output end of the first cylinder (226) is pivotally connected to the upper end of the L-shaped bracket (222). The positioning and rotating assembly (23) is located in front of the machine body (1) and is used for positioning and rotating the stainless steel tube.

2. The intelligent laser welding device for stainless steel pipes with water curtain cooling according to claim 1, characterized in that: The positioning and rotating assembly (23) includes a frame (231) located in front of the body (1). A slot (232) is fixed at the upper end of the frame (231). A left shaft seat (233) and a right shaft seat (235) are fixed at the left and right ends of the slot (232), respectively. A left support roller (234) and a right support roller (236) are rotatably installed on the front and rear sides of the left shaft seat (233) and the right shaft seat (235), respectively. A water tank (2319) is fixed inside the frame (231).

3. The intelligent laser welding device for stainless steel pipes with water curtain cooling according to claim 2, characterized in that: The positioning and rotating assembly (23) also includes a stand (237) fixed on the left and right sides of the front end of the frame (231). An extension frame (238) is fixed on the rear side of the upper end of the stand (237). A second cylinder (239) is installed on the upper end of the extension frame (238). An upper shaft seat (2310) is fixed on the output end below the second cylinder (239). Pressure rollers (2311) are rotatably installed on both the front and rear sides inside the upper shaft seat (2310).

4. The intelligent laser welding device for stainless steel pipes with water curtain cooling according to claim 2, characterized in that: The positioning and rotating assembly (23) also includes a shaft (2314) fixed between the left support roller (234) and the right support roller (236). A first gear (2312) is fixed at the end of the shaft (2314). A second gear (2313) is rotatably mounted on the outer wall of the right shaft seat (235), and the second gear (2313) meshes with the first gear (2312) on the front and rear sides. A servo motor (2315) is mounted on the outer wall of the left shaft seat (233) and is used to drive one of the shafts (2314) to rotate. A protective cover (2316) is fixed on the outside of the right shaft seat (235).

5. The intelligent laser welding device for stainless steel pipes with water curtain cooling according to claim 2, characterized in that: The positioning and rotating assembly (23) also includes a sub-shaft seat (2317) fixed at the left and right ends of the slot (232), and a sub-support wheel (2318) is rotatably installed on both the front and rear sides inside the sub-shaft seat (2317).

6. The intelligent laser welding device for stainless steel pipes with water curtain cooling according to claim 1, characterized in that: The main component (21) also includes an X-axis linear guide (211) disposed on the upper end of the body (1), a Y-axis linear guide (212) disposed on the sliding part of the X-axis linear guide (211), a Z-axis linear guide (213) disposed on the sliding part of the Y-axis linear guide (212), and a laser welder (214) mounted on the sliding part of the Z-axis linear guide (213).

7. The intelligent laser welding device for stainless steel pipes with water curtain cooling according to claim 1, characterized in that: The nozzle (224) has a narrow slit-type outlet and is used to spread the cooling water into a flat water curtain.

8. A water-curtain cooled intelligent laser welding method for stainless steel pipes, characterized in that: The intelligent laser welding device for stainless steel pipes with water curtain cooling as described in any one of claims 1-7 specifically includes the following steps: S1, First, the two stainless steel pipes to be welded are placed on the positioning and rotating assembly (23) for positioning and rotation to achieve circumferential seam rotation; S2, then, the position of the laser welder (214) relative to the weld is adjusted by the main body component (21) and welding is performed; S3. Finally, the relative angle between the nozzle (224) and the weld is adjusted by the water curtain assembly (22) to ensure that the water curtain covers the weld and the heat-affected zone.

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