High-precision laser welding positioning device for stainless steel pipes

Abstract

A kind of high-precision laser welding positioning device of stainless steel pipe, it relates to laser welding technical field, including: mobile placement shell, positioning mechanism being arranged in shell, power mechanism being arranged in the rear side of positioning mechanism;Device is applied to metal cutting and welding equipment manufacturing, make up the deficiency that four stainless steel pipes are left with cracks in laser welding, improve welding efficiency;The device can be placed to appropriate position according to need, it is easy to operate, effectively improve equipment utilization rate;The device can be automatically adjusted according to the radius of different thickness of stainless steel pipe, the position that the interface is cut when four stainless steel pipes are positioned butt welding, i.e.size, ensure that four stainless steel pipes are welded without gap, effectively save manpower.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a compression and processing device for solid waste. Background Technology

[0002] Laser welding, a high-energy-density precision machining technology, achieves efficient material joining through a focused laser beam, becoming one of the core applications in modern laser processing. Originating in the 1970s, this technology was initially used primarily for low-speed welding of thin-walled materials. Its heat conduction mechanism involves the laser radiation heating the workpiece surface, with heat gradually diffusing into the material's interior. By precisely controlling key parameters such as laser pulse width, energy intensity, peak power, and repetition frequency, the molten pool formation process can be accurately controlled. With significant advantages such as non-contact processing, a small heat-affected zone, and high weld quality, this technology has successfully overcome the technical bottlenecks in precision welding of micro-sized parts, demonstrating irreplaceable application value in high-precision manufacturing fields such as electronics and medical devices.

[0003] In the butt welding of four stainless steel pipes, two arc-shaped joints need to be cut at the ends of the stainless steel pipes to ensure that there are no gaps when the four stainless steel pipes are butt welded. Currently, the positioning of the pipe ends is mostly done manually, which is time-consuming, labor-intensive and reduces welding efficiency.

[0004] Therefore, a high-precision laser welding positioning device for stainless steel pipes is needed. This device is used in the manufacturing of metal cutting and welding equipment to compensate for the shortcomings of laser welding of four stainless steel pipes, which leaves cracks and improves welding efficiency. The device can be placed in a suitable position as needed, is easy to operate, and effectively improves equipment utilization. The device can automatically adjust according to the radius of stainless steel pipes of different thicknesses, and position the interface to be cut when welding four stainless steel pipes together, ensuring that there are no gaps when welding four stainless steel pipes, and effectively saving manpower. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a high-precision laser welding positioning device for stainless steel pipes, thereby solving the problems.

[0006] The technical solution used in this invention is: a high-precision laser welding positioning device for stainless steel pipes, comprising: a movable outer shell, a positioning mechanism disposed within the outer shell, and a power mechanism disposed on the rear side of the positioning mechanism; The outer casing has a large circular hole on its front side; The positioning mechanism includes: a support frame, pressure plates, first support plates, moving blocks, positioning pens, vertical slots, moving frames, top rods, and second support plates. The support frame is fixedly installed inside the outer casing by a rod. There are four pressure plates, with their inner ends slidably installed in the horizontal and vertical grooves on the cross-shaped support plates of the support frame. There are two first support plates, with their inner ends fixedly installed on the upper and lower sides of the cross-shaped support plates of the support frame, and the first support plates are provided with horizontal slots. There are two second support plates, with their inner ends fixedly installed on the left and right sides of the cross-shaped support plates of the support frame. There are two moving blocks, which are slidably installed in the horizontal slots on the two first support plates. There are four positioning pens, with two slidably installed in the slots on the two moving blocks, and the other two slidably installed in the slots on the two second support plates. The vertical slot is fixedly installed on the front side of the support frame. There are two moving frames, which are slidably installed in the vertical slots. There are two top rods, which are fixedly installed on the moving frames, and the two top rods are located in the vertical slots.

[0007] Preferably, the support frame has four horizontal plates on the front side, and a cross-shaped support plate is fixedly installed in the middle of the support frame. The cross-shaped support plate has horizontal and vertical grooves.

[0008] Preferably, a spring is installed on the pressure plate, and the other end of the spring is connected to four horizontal plates on the corresponding support frame. The inner side of the pressure plate is provided with a groove, and a limiting rod is fixedly installed on the rear plate of the pressure plate.

[0009] Preferably, the outer ends of the two positioning pens, which are respectively slidably installed in the slots on the two movable blocks, slide in the inner grooves of the upper and lower pressure plates, and the outer ends of the two positioning pens, which are respectively slidably installed in the slots on the two second support plates, are fixedly installed in the inner grooves of the left and right pressure plates; and the inner ends of the four positioning pens are fixedly installed with marking heads.

[0010] Preferably, a sensing head is fixedly installed at the outer end of the top rod, and the sensing head is in intermittent contact with the inner wall of the stainless steel tube to be positioned.

[0011] Preferably, the positioning mechanism further includes: gear I, a first rack, a second rack, an L-shaped rod, a cam, and a first gear; there are two gears I, with the shafts of the two gears I rotatably mounted in corresponding circular holes on the support frame; there are two first racks, each slidingly mounted on the side of a cross-shaped support plate on the support frame, with one end of each rack fixedly connected to two movable blocks, and each rack meshing with two gears I; there are two second racks, each slidingly mounted on the side of a cross-shaped support plate on the support frame, with one end of each rack fixedly connected to two movable frames, and each rack meshing with two gears I; there are two L-shaped rods, each fixedly connected to two movable frames; the shaft of the cam is rotatably mounted in the middle circular hole of the support frame, and the outer side of the cam has a groove; the first gear is fixedly mounted on the outer shaft of the cam.

[0012] Preferably, the two L-shaped rods are provided with small rods on their outer sides, and the small rods on the two L-shaped rods slide in the grooves on the outer side of the cam respectively.

[0013] Preferably, the power mechanism includes: a ring frame, a four-leaf frame, a second gear, motor I, and motor II; the ring frame is fixedly installed inside the housing by a rod; the rear ring of the four-leaf frame is rotatably installed on the ring frame, and the outer edge of the four-leaf frame contacts the limiting rods on the rear plates of the four pressure plates respectively; a hollow rod is provided in the middle of the four-leaf frame, and the hollow rod is sleeved on the outer periphery of the rear shaft of the cam; the second gear is fixedly installed on the hollow rod on the four-leaf frame; motor I is fixedly installed on the bracket on the ring frame, and its motor shaft is fixedly connected to a gear, which meshes with the second gear; motor II is fixedly installed on the bracket on the ring frame, and its motor shaft is fixedly connected to a gear, which meshes with the first gear.

[0014] The beneficial effects of this invention compared to the prior art are: 1. In this invention, gear I drives the first rack to move outward, and the first rack drives the corresponding moving block to move away from the support frame. At this time, the two moving blocks drive the upper and lower positioning pens to move outward to the same position. The position of the upper and lower positioning pens from the end of the stainless steel tube is the radius of the stainless steel tube. Precise positioning is achieved based on the radius of the stainless steel tube, ensuring that there are no gaps when welding the four stainless steel tubes.

[0015] 2. This invention starts with motor I, which drives the second gear to rotate clockwise. The second gear drives the four-leaf frame to rotate clockwise. The four-leaf frame then stops pushing the limiting rods on the rear plates of the four pressure plates. At this time, the springs on the pressure plates release their pressure, and the four pressure plates move inward simultaneously. The four pressure plates drive the four positioning pens to move inward simultaneously, so that the marking heads at the inner ends of the four positioning pens mark the corresponding positions on the stainless steel tube, which facilitates subsequent cutting and welding.

[0016] 3. This invention uses a cam to drive two L-shaped rods to move and return to their positions. The two L-shaped rods drive two moving frames to move and return to their positions. The two moving frames drive two second racks to move and return to their positions. The two second racks drive two gears I to rotate in opposite directions. The two gears I drive the corresponding moving blocks to move and return to their positions. The two moving blocks drive the corresponding positioning pens to move and return to their positions, ready for the next positioning of the stainless steel pipe. This effectively saves manpower and improves welding efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a first-angle structural diagram of the internal structure of the overall part of the present invention.

[0019] Figure 3 This is a second-angle structural diagram of the internal structure of the overall part of the present invention.

[0020] Figure 4 This is a schematic diagram of the outer shell structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the positioning mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the first angle structure of the positioning mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram of the second angle structure of the positioning mechanism of the present invention.

[0024] Figure 8 This is a schematic diagram of the power mechanism of the present invention.

[0025] The attached figures are labeled as follows: 1. Outer shell; 2. Positioning mechanism; 3. Power mechanism; 201. Support frame; 202. Pressure plate; 203. First support plate; 204. Moving block; 205. Positioning pen; 206. Vertical groove; 207. Moving frame; 208. Top rod; 209. Gear I; 210. First rack; 211. Second rack; 212. L-shaped rod; 213. Cam; 214. First gear; 215. Second support plate; 301. Ring frame; 302. Four-leaf frame; 303. Second gear; 304. Motor I; 305. Motor II. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this invention, it should be noted that the terms "upper", "lower", "in", "out", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] Example: Figures 1-8 As shown, a high-precision laser welding positioning device for stainless steel pipes is characterized by comprising: a movable outer shell 1, a positioning mechanism 2 disposed within the outer shell 1, and a power mechanism 3 disposed on the rear side of the positioning mechanism 2.

[0029] like Figure 4 As shown, the front of the outer casing 1 is provided with a large circular hole, through which the pipe that needs to be positioned can enter the equipment.

[0030] like Figures 5-7As shown, the positioning mechanism 2 includes: a support frame 201, a pressure plate 202, a first support plate 203, a moving block 204, a positioning pen 205, a vertical groove 206, a moving frame 207, a top rod 208, and a second support plate 215. The support frame 201 is fixedly installed inside the outer casing 1 by a rod. There are four pressure plates 202, and the inner ends of the four pressure plates 202 are respectively slidably installed in the horizontal and vertical grooves on the cross-shaped support plate on the support frame 201. There are two first support plates 203, and the inner ends of the two first support plates 203 are respectively fixedly installed on the upper and lower sides of the cross-shaped support plate on the support frame 201. The first support plate 203 is provided with a horizontal groove. There are two second support plates 215, and the inner ends of the two second support plates 215 are respectively fixedly installed on the left and right sides of the cross-shaped support plate on the support frame 201. On the right sides; there are two movable blocks 204, which are slidably installed in the horizontal slots on the two first support plates 203 respectively; there are four positioning pens 205, two of which are slidably installed in the slots on the two movable blocks 204 respectively, and the other two are slidably installed in the slots on the two second support plates 215 respectively; specifically, when the upper and lower movable blocks 204 move at the same time, they drive the upper and lower positioning pens 205 to move at the same time; the vertical slot 206 is fixedly installed on the front side of the support frame 201; there are two movable frames 207, which are slidably installed in the vertical slot 206 respectively; there are two push rods 208, which are fixedly installed on the movable frames 207 respectively, and the two push rods 208 are located in the vertical slot 206.

[0031] like Figures 5-7 As shown, the support frame 201 has four horizontal plates on the front side, and a cross-shaped support plate is fixedly installed in the middle of the support frame 201. The cross-shaped support plate has horizontal and vertical grooves.

[0032] like Figures 5-7 As shown, a spring is installed on the pressure plate 202, and the other end of the spring is connected to four horizontal plates on the corresponding support frame 201 respectively. The inner side of the pressure plate 202 is provided with a groove, and a limiting rod is fixedly installed on the rear plate of the pressure plate 202.

[0033] like Figures 5-7 As shown, the outer ends of two positioning pens 205, which are respectively slidably installed in the slots on the two moving blocks 204, slide in the inner grooves of the upper and lower pressure plates 202. The outer ends of two positioning pens 205, which are respectively slidably installed in the slots on the two second support plates 215, are fixedly installed in the inner grooves of the left and right pressure plates 202. Marking heads are fixedly installed on the inner ends of the four positioning pens 205. The marking heads can mark the stainless steel pipe, which is convenient for subsequent cutting of the stainless steel pipe.

[0034] like Figures 5-7As shown, a sensor head is fixedly installed at the outer end of the top rod 208, and the sensor head intermittently contacts the inner wall of the stainless steel tube to be positioned.

[0035] like Figures 5-7 As shown, the positioning mechanism 2 further includes: gear I 209, first rack 210, second rack 211, L-shaped rod 212, cam 213, and first gear 214; there are two gears I 209, and the shafts of the two gears I 209 are respectively rotatably installed in corresponding round holes on the support frame 201; there are two first racks 210, and the two first racks 210 are respectively slidably installed on the side of the cross-shaped support plate on the support frame 201, and one end of the two first racks 210 is respectively fixedly connected to two moving blocks 204. Rack 210 meshes with two gears I 209 respectively; there are two second racks 211, each slidably mounted on the side of a cross-shaped support plate on the support frame 201, with one end of each rack fixedly connected to two movable frames 207, and each rack meshing with two gears I 209 respectively; there are two L-shaped rods 212, each fixedly connected to two movable frames 207; the shaft of cam 213 is rotatably mounted in the central circular hole of the support frame 201. The outer side of cam 213 has a groove; the first gear 214 is fixedly mounted on the outer shaft of cam 213; specifically, when the first gear 214 rotates, it drives cam 213 to rotate clockwise. At this time, cam 213 pushes two L-shaped rods 212 to move outward simultaneously. The two L-shaped rods 212 simultaneously drive two moving frames 207 to move outward simultaneously. The two moving frames 207 drive two push rods 208 to move outward simultaneously. When the sensing heads at the outer ends of the two push rods 208 contact the inner wall of the stainless steel tube, motor II 305 stops working. When the movable frame 207 moves outward, it drives the second rack 211 to move outward. The second rack 211 drives the gear I 209 to rotate. The gear I 209 drives the first rack 210 to move outward. The first rack 210 then drives the corresponding movable block 204 to move away from the support frame 201. At this time, the two movable blocks 204 drive the upper and lower positioning pens 205 to move outward to the same position. The position of the upper and lower positioning pens 205 from the end of the stainless steel tube is the radius of the stainless steel tube.

[0036] like Figures 5-7 As shown, small rods are provided on the outer sides of the two L-shaped rods 212, and the small rods on the two L-shaped rods 212 slide in the grooves on the outer side of the cam 213 respectively.

[0037] like Figure 8As shown, the power mechanism 3 includes: a ring frame 301, a four-leaf frame 302, a second gear 303, a motor I 304, and a motor II 305; the ring frame 301 is fixedly installed inside the housing 1 by a rod; the rear ring of the four-leaf frame 302 is rotatably mounted on the ring frame 301, and the outer edge of the four-leaf frame 302 contacts the limiting rods on the rear plates of the four pressure plates 202 respectively; a hollow rod is provided in the middle position of the four-leaf frame 302, and the hollow rod is sleeved around the rear shaft of the cam 213; the second gear 303 is fixedly mounted on the hollow rod of the four-leaf frame 302. On the rod; motor I 304 is fixedly mounted on a bracket on the ring frame 301, and its motor shaft is fixedly connected to a gear, which meshes with the second gear 303; specifically, when motor I 304 starts, it drives the second gear 303 to rotate, and the second gear 303 drives the four-leaf frame 302 to rotate; motor II 305 is fixedly mounted on a bracket on the ring frame 301, and its motor shaft is fixedly connected to a gear, which meshes with the first gear 214; specifically, when motor II 305 starts, it drives the first gear 214 to rotate.

[0038] Working principle: This equipment is used in the manufacture of metal cutting and welding equipment to compensate for the shortcomings of laser welding of four stainless steel pipes, which leaves cracks and improves welding efficiency; the equipment can be placed in a suitable position as needed, is easy to operate, and effectively improves equipment utilization; the equipment can automatically adjust according to the radius of stainless steel pipes of different thicknesses, and position the interface to be cut when welding four stainless steel pipes together, ensuring that there are no gaps when welding four stainless steel pipes, effectively saving manpower; When positioning the stainless steel pipe interface, firstly, the end of the stainless steel pipe to be welded is manually inserted into the large circular hole on the front side of the outer casing 1. The movement of the stainless steel pipe is stopped when the end of the pipe contacts the front side of the support frame 201. At this point, the vertical groove 206 is completely located inside the stainless steel pipe. Then, motor II 305 is started, driving the first gear 214 to rotate clockwise. The first gear 214 drives the cam 213 to rotate clockwise. At this time, the cam 213 pushes the two L-shaped rods 212 to move outward simultaneously. The two L-shaped rods 212 simultaneously drive the two moving frames 207 to move outward simultaneously. The two moving frames 207 drive the two push rods 208 to move outward simultaneously. When the sensing heads at the outer ends of the two push rods 208 contact the inner wall of the stainless steel tube, the motor II 305 stops working. When the two moving frames 207 move outward, the moving frames 207 drive the second rack 211 to move outward. The second rack 211 drives the gear I 209 to rotate. The gear I 209 drives the first rack 210 to move outward. The first rack 210 then drives the corresponding moving block 204 to move away from the support frame 201. At this time, the two moving blocks 204 drive the upper and lower positioning pens 205 to move outward to the same position. At this time, the position of the upper and lower positioning pens 205 from the end of the stainless steel tube is the radius length of the stainless steel tube. Then, motor I 304 starts, driving the second gear 303 to rotate clockwise. The second gear 303 drives the four-leaf frame 302 to rotate clockwise. The four-leaf frame 302 no longer pushes the limiting rods on the rear plates of the four pressure plates 202. At this time, the springs on the pressure plates 202 release pressure, and the four pressure plates 202 move inward simultaneously. The four pressure plates 202 drive the four positioning pens 205 to move inward simultaneously, so that the marking heads at the inner ends of the four positioning pens 205 mark the corresponding positions on the stainless steel tube. Then, motor I 304 works in reverse. The second gear 303 is driven to move in the opposite direction and return to its original position. The second gear 303 drives the four-leaf frame 302 to move in the opposite direction and return to its original position. The four-leaf frame 302 pushes the four pressure plates 202 outward to their original positions. At this time, the springs on the pressure plates 202 are compressed. Then, the positioned stainless steel tube is manually removed. Subsequently, two arc-shaped cuts are cut according to the four points on the stainless steel tube. When the four stainless steel tubes are joined together, the arc-shaped cuts on the stainless steel tubes are joined in pairs, which can make the four stainless steel tubes seamlessly joined together, which facilitates the laser welding work after the four stainless steel tubes are joined together. Finally, motor II 305 reverses its operation, causing the first gear 214 to rotate in the opposite direction and return to its original position. The first gear 214 then causes the cam 213 to rotate in the opposite direction and return to its original position. The cam 213 then causes the two L-shaped rods 212 to move and return to their original positions. The two L-shaped rods 212 then cause the two moving frames 207 to move and return to their original positions. The two moving frames 207 then cause the two second racks 211 to move and return to their original positions. The two second racks 211 then cause the two gears I 209 to rotate in the opposite direction. The two gears I 209 then cause the corresponding moving blocks 204 to move and return to their original positions. The two moving blocks 204 then cause the corresponding positioning pens 205 to move and return to their original positions, ready for the next positioning of the stainless steel pipe. This effectively saves manpower and improves welding efficiency.

[0039] 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 high-precision laser welding positioning device for stainless steel pipes, characterized in that, include: The movable housing (1), the positioning mechanism (2) set inside the housing (1), and the power mechanism (3) set behind the positioning mechanism (2). The outer casing (1) has a large circular hole on its front side; The positioning mechanism (2) includes: a support frame (201), a pressure plate (202), a first support plate (203), a moving block (204), a positioning pen (205), a vertical groove (206), a moving frame (207), a top rod (208), and a second support plate (215); the support frame (201) is fixedly installed inside the outer shell (1) by a rod; The support frame (201) has four horizontal plates on the front side, and a cross-shaped support plate is fixedly installed in the middle of the support frame (201). The cross-shaped support plate has horizontal and vertical grooves. There are four pressure plates (202), and the inner ends of the four pressure plates (202) are respectively slidably installed in the horizontal and vertical grooves on the cross-shaped support plate on the support frame (201); there are two first support plates (203), and the inner ends of the two first support plates (203) are respectively fixedly installed on the upper and lower sides of the cross-shaped support plate on the support frame (201), and the first support plates (203) are provided with horizontal grooves; there are two second support plates (215), and the inner ends of the two second support plates (215) are respectively fixedly installed on the left and right sides of the cross-shaped support plate on the support frame (201); there are two moving blocks (204), and the two moving blocks (204) are respectively slidably installed on the two first support plates (201). The horizontal groove on the support plate (203) contains four positioning pens (205), two of which are slidably installed in the slots on the two moving blocks (204), and the other two are slidably installed in the slots on the two second support plates (215); the vertical groove (206) is fixedly installed on the front side of the support frame (201); there are two moving frames (207), which are slidably installed in the vertical groove (206); there are two top rods (208), which are fixedly installed on the moving frame (207), and the two top rods (208) are located in the vertical groove (206); A spring is installed on the pressure plate (202), and the other end of the spring is connected to the four horizontal plates on the corresponding support frame (201). The inner side of the pressure plate (202) is provided with a groove, and a limiting rod is fixedly installed on the rear plate of the pressure plate (202). The outer end of the top rod (208) is fixedly equipped with a sensing head, which intermittently contacts the inner wall of the stainless steel tube to be positioned. The positioning mechanism (2) further includes: gear I (209), first rack (210), second rack (211), L-shaped rod (212), cam (213), and first gear (214); there are two gears I (209), and the shafts of the two gears I (209) are respectively rotatably installed in corresponding round holes on the support frame (201); there are two first racks (210), and the two first racks (210) are respectively slidably installed on the side of the cross-shaped support plate on the support frame (201), and one end of the two first racks (210) is respectively fixedly connected to two moving blocks (204), and the two first racks (210) are connected to the two gears I (209). The gears mesh separately; there are two second racks (211), which are slidably mounted on the side of the cross-shaped support plate on the support frame (201), and one end of each second rack (211) is fixedly connected to the two movable frames (207), and the two second racks (211) mesh with the two gears I (209); there are two L-shaped rods (212), which are fixedly connected to the two movable frames (207); the shaft of the cam (213) is rotatably mounted in the middle round hole of the support frame (201), and the outer side of the cam (213) is provided with a groove; the first gear (214) is fixedly mounted on the outer shaft of the cam (213); The power mechanism (3) includes: a ring frame (301), a four-leaf frame (302), a second gear (303), a motor I (304), and a motor II (305); the ring frame (301) is fixedly installed inside the outer casing (1) by a rod; the rear ring of the four-leaf frame (302) is rotatably installed on the ring frame (301), the outer edge of the four-leaf frame (302) contacts the limiting rods on the rear plates of the four pressure plates (202), and a hollow rod is provided in the middle position of the four-leaf frame (302). The core rod is sleeved on the outer periphery of the rear shaft of the cam (213); the second gear (303) is fixedly mounted on the hollow rod on the four-leaf frame (302); motor I (304) is fixedly mounted on the bracket on the ring frame (301), and its motor shaft is fixedly connected to a gear, which meshes with the second gear (303); motor II (305) is fixedly mounted on the bracket on the ring frame (301), and its motor shaft is fixedly connected to a gear, which meshes with the first gear (214).

2. The high-precision laser welding positioning device for stainless steel pipes according to claim 1, characterized in that, The outer ends of the two positioning pens (205) that are slidably installed in the slots on the two movable blocks (204) slide in the inner grooves of the upper and lower pressure plates (202), respectively. The outer ends of the two positioning pens (205) that are slidably installed in the slots on the two second support plates (215) are fixedly installed in the inner grooves of the left and right pressure plates (202); the inner ends of the four positioning pens (205) are fixedly installed with marking heads.

3. The high-precision laser welding positioning device for stainless steel pipes according to claim 1, characterized in that, The L-shaped rod (212) is provided with a small rod on its outer side, and the small rods on the two L-shaped rods (212) slide in the groove on the outer side of the cam (213).

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