High-strength steel pipe welding equipment and process based on laser-induced hybrid welding technology

Abstract

The invention belongs to the technical field of steel pipe welding, particularly relates to high-strength steel pipe welding equipment and process based on a laser-induced hybrid welding technology, and solves the problems of high interference degree and poor correction function in the prior art, the high-strength steel pipe welding equipment comprises a base, and the top of the base is fixedly connected with an outer gear ring and two symmetrically arranged clamping assemblies; a welding assembly is installed on the peripheral face of the outer gear ring and composed of an arc-shaped transmission frame and a limiting transmission frame, the outer gear ring is movably sleeved with the arc-shaped transmission frame, the limiting transmission frame is slidably assembled in the arc-shaped transmission frame, a laser induction head and a welding head are installed on one side of the limiting transmission frame, and the welding assembly is used for welding steel pipes. Through the arrangement of the outer gear ring, the arc-shaped transmission frame and other structures, the continuity and stability of circumferential welding are achieved, the problems of mechanical arm interference and the like are avoided, meanwhile, the adaptability of equipment to steel pipes with different pipe diameters is improved, frequent equipment parameter adjustment or clamp replacement is not needed, and the welding efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe welding, and in particular to high-strength steel pipe welding equipment and a process based on laser-induced hybrid welding technology. Background Art

[0002] At present, high-strength steel pipe welding equipment based on laser induced hybrid welding technology is a special welding device that integrates laser and arc composite heat source, automatic transmission mechanism and precision clamping system.

[0003] In the field of high-end equipment manufacturing, the welding quality of high-strength steel pipes is directly related to the safety and reliability of the overall structure, making its importance self-evident. However, conventional welding equipment faces numerous insurmountable technical bottlenecks when it comes to welding high-strength steel pipes. Conventional equipment performs particularly poorly in circumferential welding. Due to inherent mechanical defects, problems such as robot arm interference and complex trajectory planning often occur, making it difficult to achieve continuous and stable circumferential motion during the welding process, seriously affecting the quality of the welded joint and the strength of the overall structure. Furthermore, conventional equipment has poor adaptability to pipe diameters. Frequent adjustments to equipment parameters or replacement of specialized fixtures are required for handling pipes of varying diameters. This not only significantly increases pre-production preparation time and costs, but also significantly reduces welding efficiency, making it difficult to meet the requirements of modern production lines for efficient and flexible production. More critically, conventional equipment lacks real-time detection and correction capabilities, making it unable to promptly detect and correct dynamic defects such as weld pool offset and porosity initiation during the welding process. This results in unstable weld quality, low first-pass yields, and complex and costly subsequent repairs. Summary of the Invention

[0004] The purpose of the present invention is to provide high-strength steel pipe welding equipment and process based on laser induced hybrid welding technology, which solves the problems of high interference and poor correction function.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a high-strength steel pipe welding device and process based on laser-induced hybrid welding technology, comprising a base, the top of which is fixedly connected to an outer gear ring and two symmetrically arranged clamping assemblies;

[0006] A welding assembly is installed on the outer circumference of the outer gear ring. The welding assembly consists of an arc-shaped transmission frame and a limit transmission frame. The arc-shaped transmission frame is movably sleeved on the outer gear ring, and the limit transmission frame is slidably assembled inside the arc-shaped transmission frame. A laser induction head and a welding head are respectively installed on one side of the limit transmission frame. The welding assembly is used for welding steel pipes.

[0007] The clamping assembly consists of a fixed frame and two clamping plates. The fixed frame is fixedly connected to the top of the base, and the two clamping plates are symmetrically arranged and slidably assembled inside the fixed frame.

[0008] As a preferred solution of the present invention, at least two symmetrically arranged transmission motors are installed on one side of the arc-shaped transmission frame, and the output end of the transmission motor is connected to a coaxially arranged transmission shaft through a coupling. A first meshing gear is fixedly sleeved on the outer peripheral surface of the transmission shaft, and the first meshing gear is meshed with the outer gear ring.

[0009] As a preferred solution of the present invention, an arc-shaped internal rack is fixedly connected to one side of the arc-shaped transmission frame, the limit transmission frame is sleeved on the arc-shaped internal rack, a rotating motor is installed on one side of the limit transmission frame, the output end of the rotating motor is connected to a second meshing gear through a coupling, and the arc-shaped internal rack and the second meshing gear are meshed with each other.

[0010] As a preferred solution of the present invention, a plurality of equally spaced auxiliary balls are rotatably mounted on one side of the position limiting transmission frame.

[0011] As a preferred solution of the present invention, a detection camera and two symmetrically arranged cylinders are installed on one side of the limit transmission frame, a straight shaft is installed at the output end of the cylinder, one end of the straight shaft is fixedly connected to a connecting frame, a first servo motor is installed inside the connecting frame, a first rotating frame is installed at the output end of the first servo motor, a second servo motor is installed on one side of the first rotating frame, and a second rotating frame is installed at the output end of the second servo motor.

[0012] As a preferred solution of the present invention, a third servo motor is installed inside the second rotating frame, and the laser induction head and the welding head are respectively installed at the output ends of the two third servo motors.

[0013] As a preferred solution of the present invention, the internal sliding assembly of the fixed frame is equipped with two symmetrically arranged limit guide rods, and the two limit guide rods are symmetrically arranged and fixedly connected to one side of the clamping plate. One side of the clamping plate is fixedly connected to an inner groove block, and the inner groove block and the interior of the fixed frame are jointly rotated and installed with a threaded shaft, and one end of the threaded shaft is fixedly connected to a screw head.

[0014] Process of high-strength steel pipe welding equipment based on laser induced hybrid welding technology:

[0015] Step S1: Steel pipe clamping and positioning:

[0016] Place the high-strength steel pipe to be welded coaxially in the fixed frames of the two clamping assemblies. By rotating the screw head at the end of the threaded shaft, the inner groove block is driven to move along the axial direction of the fixed frame, driving the two clamping plates to perform symmetrical opening and closing movements until the inner wall of the clamping plate forms surface contact with the outer wall of the steel pipe and is fixed.

[0017] Repeat the above steps to complete the clamping of the other steel pipe, ensuring that the butt ends of the two steel pipes fit tightly together and their axes coincide.

[0018] Step S2: Initial positioning of welding components:

[0019] Start the transmission motor, and drive the arc-shaped transmission frame to make circular motion along the axis of the steel pipe through the meshing transmission of the first meshing gear and the outer ring gear, so that the laser induction head and the welding head move to above the butt joint area of ​​the steel pipe;

[0020] The rotary motor is started to drive the limit transmission frame to slide radially along the arc-shaped transmission frame through the meshing transmission of the second meshing gear and the arc-shaped inner rack, thereby adjusting the initial relative position between the laser induction head and the weld;

[0021] Step S3: Automatic weld identification and path planning:

[0022] The weld image is collected in real time by the detection camera, and the weld centerline coordinates are extracted through the image processing algorithm;

[0023] The control system generates the welding trajectory according to the geometric characteristics of the weld, converts it into motion instructions for the transmission motor and the rotary motor, and plans the welding path;

[0024] Step S4: Multi-axis linkage welding execution:

[0025] Step S4.1: Laser-induced preheating

[0026] Start the laser induction head to form a keyhole on the weld surface and preheat the base material;

[0027] Synchronously drive the transmission motor and the rotary motor to make the laser induction head perform compound motion along the planned path, and perform spiral scanning to preheat the weld;

[0028] Step S4.2: Hybrid welding implementation

[0029] Start the welding head, output the arc heat source and melt the filler wire to form a molten pool;

[0030] Through the three-axis linkage of the first servo motor, the second servo motor and the third servo motor, the welding head posture is adjusted in real time so that the arc axis and the weld tangent maintain a preset angle;

[0031] The transmission motor and the rotary motor move in coordination to drive the welding assembly to move continuously along the weld track, while the auxiliary ball contacts the surface of the outer gear ring to eliminate the transmission gap;

[0032] Step S5: Online quality monitoring and compensation:

[0033] The molten pool morphology is monitored in real time by the detection camera. When welding defect characteristics are detected, the laser power, welding current or welding speed parameters are automatically adjusted;

[0034] Continuously optimize welding heat input and heat source distribution to ensure weld quality;

[0035] Step S6: Welding completion and workpiece unloading:

[0036] After the welding end point is reached, the welding head and the laser induction head are closed in sequence, and the transmission motor drives the welding assembly to reset to the initial position;

[0037] Rotate the threaded shaft in the opposite direction to loosen the clamping plate and take out the welded high-strength steel pipe component.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The present invention realizes the continuity and stability of circumferential welding by setting up structures such as the outer gear ring and the arc-shaped transmission frame, avoids problems such as interference of the robotic arm, and improves the adaptability of the equipment to steel pipes of different diameters. There is no need to frequently adjust equipment parameters or replace fixtures, which significantly improves welding efficiency.

[0040] 2. The present invention forms a closed-loop control system by setting up structures such as a detection camera and a servo system. It can collect weld images in real time and automatically correct the heat source angle according to the weld imaging to ensure that the laser keyhole and the arc axis are always perpendicular to the weld tangent direction, thereby realizing real-time detection and correction of dynamic defects in the welding process and ensuring the stability of welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 This is a schematic diagram of the overall structure of the welding assembly of the present invention;

[0043] Figure 3 It is a cross-sectional view of the arc-shaped transmission frame of the present invention;

[0044] Figure 4 It is a schematic diagram of the transmission structure of the limit transmission frame of the present invention;

[0045] Figure 5 This is a schematic diagram of the overall structure of the limit transmission frame of the present invention;

[0046] Figure 6 It is a schematic diagram of the overall structure of the clamping plate of the present invention.

[0047] In the figure: 1. Base; 11. Outer ring gear; 2. Welding assembly; 21. Arc-shaped transmission frame; 211. Transmission motor; 212. Transmission shaft; 213. First meshing gear; 214. Arc-shaped inner rack; 22. Position-limiting transmission frame; 221. Rotating motor; 222. Second meshing gear; 223. Auxiliary ball bearing; 224. Inspection camera; 23. Cylinder; 231. Straight shaft; 232. Connecting frame; 24. First servo motor; 241. First rotating frame; 25. Second servo motor; 251. Second rotating frame; 26. Third servo motor; 27. Laser induction head; 28. Welding head;

[0048] 3. Clamping assembly; 31. Fixed frame; 32. Clamping plate; 321. Limiting guide rod; 322. Inner groove block; 33. Threaded shaft; 331. Screw head. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] See also Figure 1-6 , a high-strength steel pipe welding device and process based on laser induced hybrid welding technology, comprising a base 1, the top of which is fixedly connected to an outer gear ring 11 and two symmetrically arranged clamping assemblies 3;

[0051] A welding assembly 2 is mounted on the outer circumference of the outer gear ring 11. The welding assembly 2 consists of an arc-shaped transmission frame 21 and a limit transmission frame 22. The arc-shaped transmission frame 21 is movably mounted on the outer gear ring 11, and the limit transmission frame 22 is slidably mounted inside the arc-shaped transmission frame 21. A laser induction head 27 and a welding head 28 are mounted on one side of the limit transmission frame 22. The welding assembly 2 is used for welding steel pipes.

[0052] The clamping assembly 3 consists of a fixed frame 31 and two clamping plates 32 . The fixed frame 31 is fixedly connected to the top of the base 1 , and the two clamping plates 32 are symmetrically arranged and slidably assembled inside the fixed frame 31 .

[0053] Specifically, the main body of the high-strength steel pipe welding equipment based on laser induced composite welding technology consists of a base 1, an outer gear ring 11, a clamping assembly 3 and a welding assembly 2. The base 1 serves as a load-bearing base, and the annular outer gear ring 11 and two sets of symmetrical clamping assemblies 3 are fixedly installed on its top. The outer gear ring 11 provides an annular motion track for the arc-shaped transmission frame 21, and the welding assembly 2 is movably connected to the outer periphery of the outer gear ring 11 through the arc-shaped transmission frame 21 to achieve circumferential free rotation. The internal sliding assembly of the arc-shaped transmission frame 21 is equipped with a limit transmission frame 22, which realizes radial precise displacement through a built-in guide rail. The side of the limit transmission frame 22 is integrated with a laser induction head 27 and a welding head 28, and the two are arranged in parallel axially. The laser induction head 27 is responsible for forming a keyhole on the weld surface and preheating the base material, and the welding head 28 synchronously outputs an arc heat source to melt the welding wire. The clamping assembly 3 consists of a fixed frame 31 and a pair of clamping plates 32. The fixed frame 31 is bolted to the base 1, and two sets of wedge-shaped clamping plates 32 are slidably assembled within it. The backs of the clamping plates 32 form a sliding pair with the fixed frame 31 via limiting guide rods 321, ensuring that the clamping force acts perpendicularly to the axis of the steel pipe. This equipment achieves circumferential welding through the meshing transmission of the outer ring gear 11 and the arc-shaped transmission frame 21. The radial sliding of the limiting transmission frame 22 adjusts the distance between the laser-arc composite heat source and the weld seam. The symmetrical wedge-shaped clamping structure of the clamping assembly 3 ensures the coaxiality of the steel pipe, forming a spatiotemporal coupled system for laser-induced preheating and arc welding.

[0054] In this embodiment, at least two symmetrically arranged transmission motors 211 are installed on one side of the arc-shaped transmission frame 21. The output end of the transmission motor 211 is connected to a coaxially arranged transmission shaft 212 through a coupling. A first meshing gear 213 is fixedly sleeved on the outer peripheral surface of the transmission shaft 212, and the first meshing gear 213 is meshed with the outer gear ring 11.

[0055] Specifically, two sets of symmetrical transmission motors 211 are integrated on the side of the arc-shaped transmission frame 21. The motor output shaft is directly connected to the transmission shaft 212 through a coupling, and the first meshing gear 213 is fixed to the end of the transmission shaft 212. When the transmission motor 211 is started, the first meshing gear 213 meshes with the rack on the outer edge of the outer ring gear 11 to drive the arc-shaped transmission frame 21 to perform circular motion along the outer ring gear 11. The transmission mechanism adopts a dual-motor redundant design, and realizes precise start and stop and speed adjustment of the arc-shaped transmission frame 21 through differential control. The module matching design of the first meshing gear 213 and the outer ring gear 11 ensures smooth transmission. The meshing clearance of the gear pair is compensated by a pre-tightening spring to eliminate the influence of reverse clearance on the accuracy of the welding trajectory. The transmission shaft 212 adopts a hollow structure to reduce the inertial load. The laser energy transmission optical fiber and the welding head 28 control circuit are passed through the interior to realize the integrated layout of power transmission and signal feedback. This transmission system enables the welding assembly 2 to move continuously along the circumferential seam of the steel pipe, providing a stable circumferential moving platform for the laser induction head 27 and the welding head 28.

[0056] In this embodiment, an arc-shaped inner rack 214 is fixedly connected to one side of the arc-shaped transmission frame 21, and the limit transmission frame 22 is sleeved on the arc-shaped inner rack 214. A rotating motor 221 is installed on one side of the limit transmission frame 22, and the output end of the rotating motor 221 is connected to the second meshing gear 222 through a coupling, and the arc-shaped inner rack 214 and the second meshing gear 222 are meshed with each other.

[0057] Specifically, an arc-shaped internal rack 214 is fixedly mounted on the inner side of the arc-shaped transmission frame 21, and the limit transmission frame 22 forms a sliding pair with the internal rack through a sleeve structure. A rotary motor 221 is mounted on the side of the limit transmission frame 22, and its output shaft is connected to the second meshing gear 222 via a coupling. When the rotary motor 221 is driven, the second meshing gear 222 meshes with the arc-shaped internal rack 214, pushing the limit transmission frame 22 to slide radially along the arc-shaped transmission frame 21. The radial adjustment mechanism adopts a modular design, and the tooth profile parameters of the arc-shaped internal rack 214 are optimized to match the pitch circle diameter of the second meshing gear 222 to ensure a precise transmission ratio. A bidirectional hydraulic buffer is provided on the sliding guide rail of the limit transmission frame 22 to absorb the impact load of the meshing. The forward and reverse rotation control of the rotary motor 221 realizes dynamic adjustment of the distance between the laser-arc composite heat source and the weld seam, and cooperates with the circumferential transmission motor 211 to form two-dimensional motion control in a polar coordinate system, providing a mechanical basis for adaptive welding of complex curved welds.

[0058] In this embodiment, a plurality of equally spaced auxiliary balls 223 are rotatably mounted on one side of the position limiting transmission frame 22 .

[0059] Specifically, multiple groups of auxiliary balls 223 are evenly distributed on the side of the limit transmission frame 22. The balls are arranged at equal intervals through the retaining frame and form rolling contact with the outer edge of the outer gear ring 11. The auxiliary balls 223 are made of high-hardness chromium alloy and the surface is titanium-plated to reduce the friction coefficient. During the movement of the welding assembly 2, the auxiliary balls 223 bear part of the radial load, converting sliding friction into rolling friction, significantly reducing the transmission resistance. At the same time, the ball array forms a continuous support ring belt, which effectively suppresses the radial deflection of the arc-shaped transmission frame 21 and ensures the stability of the spatial posture of the laser induction head 27 and the welding head 28. The preload force of the auxiliary balls 223 is precisely controlled by the elastic deformation of the retaining frame to avoid transmission jamming caused by over-constraint and improve the dynamic response characteristics of the equipment under high-speed welding conditions.

[0060] In this embodiment, a detection camera 224 and two symmetrically arranged cylinders 23 are installed on one side of the limit transmission frame 22, a straight shaft 231 is installed on the output end of the cylinder 23, one end of the straight shaft 231 is fixedly connected to a connecting frame 232, a first servo motor 24 is installed inside the connecting frame 232, a first rotating frame 241 is installed on the output end of the first servo motor 24, a second servo motor 25 is installed on one side of the first rotating frame 241, and a second rotating frame 251 is installed on the output end of the second servo motor 25.

[0061] Specifically, the front end of the limited transmission frame 22 integrates an inspection camera 224 and two sets of symmetrical cylinders 23. The inspection camera 224 utilizes an industrial-grade CMOS sensor, equipped with a coaxial light source and a narrowband filter, to capture real-time images of the weld pool. The cylinder 23 is connected to the frame 232 via a straight shaft 231, which features a bidirectional rotating hinge to compensate for assembly errors. The connecting frame 232 houses a first servo motor 24, whose output shaft connects to the first rotating frame 241, forming a pitch adjustment mechanism around the horizontal axis. A second servo motor 25 is mounted on the side of the first rotating frame 241, driving the second rotating frame 251 to achieve yaw adjustment around the vertical axis 231. This multi-axis linkage mechanism combines the telescopic motion of the cylinder 23 with the rotational motion of the servo motor to achieve three-dimensional position adjustment of the welding head 28. The inspection camera 224 and the servo system form a closed-loop control system, automatically adjusting the heat source angle based on the weld image to ensure that the laser keyhole and the arc axis are always perpendicular to the weld tangent.

[0062] In this embodiment, a third servo motor 26 is installed inside the second rotating frame 251 , and the laser induction head 27 and the welding head 28 are respectively installed at the output ends of the two third servo motors 26 .

[0063] Specifically, the second rotating frame 251 integrates two sets of third servo motors 26, which respectively drive the laser induction head 27 and the welding head 28 to rotate. The laser induction head 27 uses a fiber laser, outputting a continuous laser beam with a wavelength of 1070nm. Through a collimating lens group and a focusing lens group, it forms a keyhole spot with a diameter of 0.3mm. The welding head 28 is equipped with a MIG arc nozzle with a built-in wire feed tube and conductive nozzle. The arc voltage is dynamically adjusted through PWM modulation. The third servo motor 26 adopts a hollow shaft design, and the laser transmission fiber and welding wire pass through the axial center hole to avoid line entanglement caused by rotation. The laser induction head 27 and the welding head 28 are connected to the output shaft of the third servo motor 26 via a flange, achieving continuous rotation of ±180°. This dual-head rotation mechanism enables the composite heat source to flexibly switch operating modes, ensuring that the laser keyhole is always at the forefront of the arc, forming a synergistic mechanism of laser pilot and arc fill, significantly improving the weld penetration and forming quality of high-strength steel.

[0064] In this embodiment, the internal sliding assembly of the fixed frame 31 is equipped with two symmetrically arranged limit guide rods 321. The two limit guide rods 321 are symmetrically arranged and fixedly connected to one side of the clamping plate 32. One side of the clamping plate 32 is fixedly connected to an inner groove block 322. The inner groove block 322 and the interior of the fixed frame 31 are jointly rotatably installed with a threaded shaft 33, and one end of the threaded shaft 33 is fixedly connected to a screw head 331.

[0065] Specifically, a bidirectional limiting guide rod 321 is provided inside the fixed frame 31 of the clamping assembly 3, and the end of the guide rod is fixedly connected to the wedge-shaped clamping plate 32. An inner groove block 322 is welded on the back of the clamping plate 32, and the threaded hole of the inner groove block 322 forms a spiral transmission pair with the threaded shaft 33. A square screw head 331 is processed at the end of the threaded shaft 33, and is driven to rotate by hand or an electric tool. When the threaded shaft 33 rotates, the inner groove block 322 translates axially, driving the two sets of clamping plates 32 to perform symmetrical opening and closing movements. A carbide insert is provided on the working surface of the clamping plate 32, and a grid-like anti-slip pattern is processed on the surface to increase the friction coefficient with the steel pipe. The limiting guide rod 321 is supported by a double-row cylindrical roller bearing to eliminate radial offset loads during the movement of the clamping plate 32. The clamping mechanism realizes the self-locking function through pure mechanical spiral transmission to ensure zero axial displacement of the steel pipe during welding. The symmetrical layout design of the double clamping plates 32 can automatically compensate for the ovality error of the steel pipe, so that the weld joint always remains coaxial, providing a precise clamping reference for laser-arc hybrid welding.

[0066] Process of high-strength steel pipe welding equipment based on laser induced hybrid welding technology:

[0067] Step S1: Steel pipe clamping and positioning:

[0068] The high-strength steel pipe to be welded is coaxially placed in the fixing frames 31 of the two clamping assemblies 3. By rotating the screw head 331 at the end of the threaded shaft 33, the inner groove block 322 is driven to move axially along the fixing frame 31, driving the two clamping plates 32 to perform symmetrical opening and closing movements until the inner walls of the clamping plates 32 form surface contact with the outer walls of the steel pipe and are fixed;

[0069] Repeat the above steps to complete the clamping of the other steel pipe, ensuring that the butt ends of the two steel pipes fit tightly together and their axes coincide.

[0070] Step S2: Initial positioning of welding component 2:

[0071] Start the transmission motor 211, and drive the arc-shaped transmission frame 21 to make circular motion along the axis of the steel pipe through the meshing transmission of the first meshing gear 213 and the outer ring gear 11, so that the laser induction head 27 and the welding head 28 move to the upper part of the steel pipe joint area;

[0072] The rotary motor 221 is started, and the second meshing gear 222 is meshed with the arc-shaped inner rack 214 to drive the limit transmission frame 22 to slide radially along the arc-shaped transmission frame 21, thereby adjusting the initial relative position between the laser induction head 27 and the weld seam.

[0073] Step S3: Automatic weld identification and path planning:

[0074] The detection camera 224 is used to collect the weld image in real time, and the weld centerline coordinates are extracted through the image processing algorithm;

[0075] The control system generates a welding trajectory based on the geometric characteristics of the weld and converts it into motion instructions for the transmission motor 211 and the rotary motor 221 to plan the welding path;

[0076] Step S4: Multi-axis linkage welding execution:

[0077] Step S4.1: Laser-induced preheating

[0078] The laser induction head 27 is started to form a keyhole on the weld surface and preheat the base material;

[0079] Synchronously drive the transmission motor 211 and the rotation motor 221 to make the laser induction head 27 perform compound motion along the planned path, and perform spiral scanning and preheating on the weld;

[0080] Step S4.2: Hybrid welding implementation

[0081] The welding head 28 is started to output arc heat source and melt the filler wire to form a molten pool;

[0082] Through the three-axis linkage of the first servo motor 24, the second servo motor 25 and the third servo motor 26, the posture of the welding head 28 is adjusted in real time so that the arc axis and the weld tangent maintain a preset angle;

[0083] The transmission motor 211 and the rotary motor 221 move in coordination to drive the welding assembly 2 to continuously move along the weld track, while the auxiliary ball 223 contacts the surface of the outer gear ring 11 to eliminate transmission clearance;

[0084] Step S5: Online quality monitoring and compensation:

[0085] The molten pool morphology is monitored in real time by the detection camera 224, and when welding defect characteristics are detected, the laser power, welding current or welding speed parameters are automatically adjusted;

[0086] Continuously optimize welding heat input and heat source distribution to ensure weld quality;

[0087] Step S6: Welding completion and workpiece unloading:

[0088] After the welding end point is reached, the welding head 28 and the laser induction head 27 are closed in sequence, and the transmission motor 211 drives the welding assembly 2 to return to the initial position;

[0089] The threaded shaft 33 is rotated in the reverse direction to loosen the clamping plate 32 and take out the welded high-strength steel pipe component.

[0090] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength steel pipe welding device based on laser induced hybrid welding technology, comprising a base (1), the top of which is fixedly connected to an outer gear ring (11) and two symmetrically arranged clamping assemblies (3), characterized in that ； A welding assembly (2) is installed on the outer peripheral surface of the outer gear ring (11). The welding assembly (2) consists of an arc-shaped transmission frame (21) and a limit transmission frame (22). The arc-shaped transmission frame (21) is movably sleeved on the outer gear ring (11). The limit transmission frame (22) is slidably assembled inside the arc-shaped transmission frame (21). A laser induction head (27) and a welding head (28) are respectively installed on one side of the limit transmission frame (22). The welding assembly (2) is used for welding steel pipes. The clamping assembly (3) consists of a fixed frame (31) and two clamping plates (32). The fixed frame (31) is fixedly connected to the top of the base (1), and the two clamping plates (32) are symmetrically arranged and slidably assembled inside the fixed frame (31).

2. The high-strength steel pipe welding equipment based on laser induced hybrid welding technology according to claim 1 is characterized in that: At least two symmetrically arranged transmission motors (211) are installed on one side of the arc-shaped transmission frame (21); the output end of the transmission motor (211) is connected to a coaxially arranged transmission shaft (212) through a coupling; a first meshing gear (213) is fixedly sleeved on the outer peripheral surface of the transmission shaft (212); and the first meshing gear (213) and the outer gear ring (11) are meshed with each other.

3. The high-strength steel pipe welding equipment based on laser induced hybrid welding technology according to claim 2 is characterized in that: An arc-shaped inner rack (214) is fixedly connected to one side of the arc-shaped transmission frame (21), and the position-limiting transmission frame (22) is sleeved on the arc-shaped inner rack (214). A rotating motor (221) is installed on one side of the position-limiting transmission frame (22), and the output end of the rotating motor (221) is connected to a second meshing gear (222) via a coupling, and the arc-shaped inner rack (214) and the second meshing gear (222) are meshed with each other.

4. The high-strength steel pipe welding equipment based on laser induced hybrid welding technology according to claim 1 is characterized in that: A plurality of equally spaced auxiliary balls (223) are rotatably mounted on one side of the position limiting transmission frame (22).

5. The high-strength steel pipe welding equipment based on laser induced hybrid welding technology according to claim 1 is characterized in that: A detection camera (224) and two symmetrically arranged cylinders (23) are respectively installed on one side of the limit transmission frame (22); a straight shaft (231) is installed on the output end of the cylinder (23); one end of the straight shaft (231) is fixedly connected to a connecting frame (232); a first servo motor (24) is installed inside the connecting frame (232); a first rotating frame (241) is installed on the output end of the first servo motor (24); a second servo motor (25) is installed on one side of the first rotating frame (241); and a second rotating frame (251) is installed on the output end of the second servo motor (25).

6. The high-strength steel pipe welding equipment based on laser induced hybrid welding technology according to claim 5, characterized in that: A third servo motor (26) is installed inside the second rotating frame (251), and a laser induction head (27) and a welding head (28) are respectively installed at the output ends of the two third servo motors (26).

7. The high-strength steel pipe welding equipment based on laser induced hybrid welding technology according to claim 1 is characterized in that: The interior of the fixed frame (31) is slidably equipped with two symmetrically arranged limiting guide rods (321). The two limiting guide rods (321) are symmetrically arranged and fixedly connected to one side of the clamping plate (32). One side of the clamping plate (32) is fixedly connected to an inner groove block (322). The inner groove block (322) and the interior of the fixed frame (31) are rotatably mounted with a threaded shaft (33). One end of the threaded shaft (33) is fixedly connected to a screw head (331).

8. The process of the high-strength steel pipe welding equipment based on laser induced hybrid welding technology according to any one of claims 1 to 7, characterized in that: Step S1: Steel pipe clamping and positioning: The high-strength steel pipe to be welded is coaxially placed in the fixed frame (31) of the two clamping assemblies (3), and the screw head (331) at the end of the threaded shaft (33) is rotated to drive the inner groove block (322) to move axially along the fixed frame (31), thereby driving the two clamping plates (32) to perform symmetrical opening and closing movements until the inner wall of the clamping plate (32) forms surface contact with the outer wall of the steel pipe and is fixed; Repeat the above steps to complete the clamping of the other steel pipe, ensuring that the butt ends of the two steel pipes fit tightly together and their axes coincide. Step S2: Initial positioning of welding component (2): The transmission motor (211) is started, and the arc-shaped transmission frame (21) is driven to perform circular motion along the axis of the steel pipe through the meshing transmission of the first meshing gear (213) and the outer gear ring (11), so that the laser induction head (27) and the welding head (28) are moved to above the butt joint area of ​​the steel pipe; The rotating motor (221) is started, and the limiting transmission frame (22) is driven to slide radially along the arc-shaped transmission frame (21) through the meshing transmission of the second meshing gear (222) and the arc-shaped inner rack (214), thereby adjusting the initial relative position between the laser induction head (27) and the weld; Step S3: Automatic weld identification and path planning: The weld image is collected in real time by a detection camera (224), and the weld centerline coordinates are extracted by an image processing algorithm; The control system generates a welding trajectory according to the geometric characteristics of the weld, converts it into motion instructions for the transmission motor (211) and the rotary motor (221), and plans the welding path; Step S4: Multi-axis linkage welding execution: Step S4.1: Laser-induced preheating Starting the laser induction head (27) to form a keyhole on the weld surface and preheat the base material; Synchronously driving the transmission motor (211) and the rotary motor (221) to cause the laser induction head (27) to perform a compound motion along a planned path, thereby performing spiral scanning and preheating on the weld; Step S4.2: Hybrid welding implementation Starting the welding head (28), outputting the arc heat source and melting the filler wire to form a molten pool; The three-axis linkage of the first servo motor (24), the second servo motor (25) and the third servo motor (26) is used to adjust the posture of the welding head (28) in real time so that the arc axis and the weld tangent maintain a preset angle; The transmission motor (211) and the rotating motor (221) move in coordination to drive the welding assembly (2) to continuously move along the welding seam track, while the auxiliary ball (223) contacts the surface of the outer gear ring (11) to eliminate transmission clearance; Step S5: Online quality monitoring and compensation: The molten pool morphology is monitored in real time by a detection camera (224), and when a welding defect characteristic is detected, the laser power, welding current or welding speed parameters are automatically adjusted; Continuously optimize welding heat input and heat source distribution to ensure weld quality; Step S6: Welding completion and workpiece unloading: After the welding end point is reached, the welding head (28) and the laser induction head (27) are closed in sequence, and the transmission motor (211) drives the welding assembly (2) to reset to the initial position; The threaded shaft (33) is rotated in the opposite direction to loosen the clamping plate (32) and take out the welded high-strength steel pipe component.

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