Self-limiting pipe end welding interface laser rust removal device

Abstract

The application discloses a self-limiting pipe end welding interface laser rust removal device, and relates to the technical field of laser rust removal.The device comprises a main frame, a clamping mechanism, an axial limiting assembly and a laser rust removal execution mechanism;the bottom of the main frame is provided with a fixed arc-shaped plate matched with a steel pipe, and a limiting plate is arranged at one end of the axial limiting assembly to realize axial self-limiting;the clamping mechanism is matched with an adjustable bolt through flexible deformation of an arc-shaped clamping piece, so that the device is quickly clamped and fixed on the steel pipe.The middle part of the main frame is provided with an operation window opposite to the surface of the pipe end to be rusted;the laser rust removal execution mechanism is matched with an arc-shaped limiting rail through a sliding support, so that the laser gun is driven to move along the circumferential track of the surface of the pipe end to be rusted accurately, and the laser focal point is stable.The device has compact structure and high portability, can realize quick positioning and uniform rust removal of the surface of the pipe end of the steel pipe to be rusted, reduces the difficulty of manual operation on site, avoids laser damage to the steel pipe base body, and effectively improves the efficiency and quality of rust removal before welding.

Description

Technical Field

[0001] This invention relates to a laser rust removal device for the welded joint of a pipe end that can be self-limited. Background Technology

[0002] Before welding steel pipes, the rust-removing surfaces at the pipe ends must be thoroughly treated to remove oxide scale, rust, and contaminants. This ensures the fusion quality and mechanical properties of the weld joint. Laser rust removal technology, with its advantages of being non-contact, non-abrasive, highly precise, and environmentally friendly (without secondary pollution), has gradually replaced traditional mechanical grinding and chemical pickling methods, becoming the mainstream technology for pre-welding metal treatment.

[0003] However, existing conventional laser rust removal devices have significant drawbacks in temporary rust removal scenarios at construction sites: First, most mainstream equipment is a large, fixed, integrated machine, which is bulky and difficult to transport, making it unsuitable for the multi-station, scattered temporary rust removal needs of construction sites; Second, when operating the laser gun manually on-site, it is difficult to accurately control the relative position of the laser gun and the surface to be rusted on the pipe end, which easily leads to incomplete rust removal and local omissions due to laser focus deviation. At the same time, improper operation can easily result in excessive laser energy, damaging the base metal of the surface to be rusted on the steel pipe end and affecting the welding quality; Third, existing portable devices lack a precise self-positioning structure, requiring repeated manual calibration and alignment for each operation, which is difficult to operate and inefficient, failing to meet the needs of rapid on-site construction. Summary of the Invention

[0004] To address the aforementioned deficiencies in existing technologies, the present invention aims to provide a self-limiting laser rust removal device for pipe end weld joints, enabling portable, high-precision, and high-efficiency laser rust removal on the rust-removing surface of steel pipe ends. It also features self-positioning clamping and precise laser trajectory limiting, significantly reducing the difficulty of on-site manual operation, preventing laser damage to the steel pipe substrate, and ensuring the quality of pre-weld rust removal.

[0005] A self-limiting laser rust removal device for pipe end weld joints includes a main frame, a clamping mechanism, an axial limiting component, and a laser rust removal actuator.

[0006] The bottom of the main frame is provided with a fixed arc-shaped plate that is adapted to the outer wall of the steel pipe to be derusted. The axial limiting component includes a limiting plate fixed to one axial end of the main frame. The limiting plate is set perpendicular to the axial direction of the steel pipe to be derusted.

[0007] The clamping mechanism includes two sets of symmetrically arranged flexible arc-shaped clamping members and adjusting bolts that correspond to each of the arc-shaped clamping members. The two sets of arc-shaped clamping members are respectively located at both ends of the fixed arc-shaped plate. The adjusting bolts are installed on the main frame through threaded through holes. The bottom end of the adjusting bolt abuts against the inclined surface of the upper surface of the corresponding arc-shaped clamping member. By rotating the adjusting bolt, the arc-shaped clamping member can be pushed to undergo flexible deformation, so that the arc-shaped clamping member hugs the outer wall of the steel pipe to be derusted inward, thereby achieving the clamping and fixing of the device and the steel pipe.

[0008] The main frame has a through-type operation window in the middle, and a laser rust removal actuator that can move back and forth and circumferentially is installed in the operation window.

[0009] Furthermore, the laser rust removal actuator includes two sets of sliding supports, an arc-shaped limiting rail, and a laser gun;

[0010] The upper surface of the main frame is provided with linear tracks parallel to the axial direction of the steel pipe to be derusted on both sides of the operating window. The bottom ends of the two sets of sliding brackets are respectively slidably engaged with the linear tracks on both sides, and can slide back and forth along the axial direction of the steel pipe to be derusted.

[0011] The two ends of the arc-shaped limiting rail are fixedly connected to the top of the sliding bracket, and the arc of the arc-shaped limiting rail is adapted to the circumferential trajectory of the rust-removed surface of the steel pipe end.

[0012] The laser gun is slidably mounted on the arc-shaped limiting rail via a slider. The light-emitting end of the laser gun is positioned facing the rust-removing surface of the pipe end inside the operating window. By sliding the slider along the arc-shaped limiting rail, the laser gun is driven to move along the circumferential trajectory of the rust-removing surface of the pipe end, thereby realizing the laser rust removal operation on the rust-removing surface of the pipe end.

[0013] By sliding the slider along the arc-shaped limiting rail, the laser gun moves along the circumferential trajectory of the surface to be derusted at the pipe end, achieving laser derusting without dead angles on the entire circumference of the surface to be derusted at the pipe end, and completely solving the problem of uneven derusting caused by trajectory deviation and shaking during manual hand operation.

[0014] Furthermore, the adjusting bolt includes a hexagonal head, a threaded section, a guide post section, and a tail wedge block arranged coaxially in sequence; the threaded section is threadedly engaged with the threaded through hole on the main frame, and the bottom surface of the tail wedge block is a slope that fits against the slope of the upper surface of the arc-shaped clamping member.

[0015] The wedge-shaped transmission structure converts the vertical feed force into a radial clamping force, smoothly pushing the arc-shaped clamping part to deform, ensuring smooth and controllable clamping action, and avoiding rigid impact damage to the outer wall of the steel pipe.

[0016] Furthermore, the arc-shaped clamping member is an arc-shaped plate structure made of elastic metal material. One end of the arc-shaped clamping member is fixedly connected to the end of the fixed arc-shaped plate, and the other end is a free end. Under the push of the adjusting bolt, the free end can flexibly deform in the axial direction of the steel pipe to be derusted.

[0017] Under the push of the adjusting bolt, the free end can flexibly deform in the axial direction of the steel pipe to be derusted. Through the cantilever deformation structure fixed on one side, it contacts and hugs the outer wall of the steel pipe, ensuring that the clamping is firm and reliable, and there is no risk of displacement or loosening during the operation.

[0018] Furthermore, the plane containing the arc-shaped limiting rail is perpendicular to the axial direction of the steel pipe to be derusted, and the center of the arc-shaped limiting rail coincides with the axis of the steel pipe to be derusted, so that when the laser gun slides along the arc-shaped limiting rail, the distance between its light-emitting end and the surface of the pipe end to be derusted remains constant.

[0019] Furthermore, the sliding bracket is a height-adjustable bracket, used to adjust the radial distance between the arc-shaped limiting rail and the steel pipe to be derusted, thereby adjusting the laser focus position of the laser gun.

[0020] Furthermore, the operating window has a rectangular through-slot structure. The axial length of the operating window is greater than the axial width of the surface of the steel pipe end to be derusted, and the circumferential width of the operating window covers the entire circumference of the surface of the steel pipe end to be derusted. This ensures that all areas of the surface to be cleaned on the pipe end are completely exposed within the operating window, providing a complete working range for the laser gun's full-circumference scanning operation and avoiding blind spots in rust removal caused by structural obstruction.

[0021] Furthermore, the main frame, fixed arc plate, sliding bracket, and arc-shaped limiting rail are all made of aluminum alloy. While ensuring the overall structural rigidity and load-bearing stability of the device, the overall weight is significantly reduced, improving the portability of the device and adapting to the operational needs of multi-station transfer at construction sites; at the same time, aluminum alloy has excellent corrosion resistance, can adapt to the complex working environment of construction sites, and extend the service life of the device.

[0022] Beneficial effects:

[0023] I. Portable and Easy to Use: The device adopts a lightweight and compact design, which can be directly clamped and fixed to the end of the steel pipe for operation. There is no need to carry large equipment, and a single person can complete the entire process. Through the axial abutment of the limiting plate and the radial fit of the fixed arc plate, one-step self-limiting and precise alignment is achieved, eliminating the need for repeated manual calibration, greatly shortening the operation preparation time, perfectly adapting to the multi-station and scattered temporary rust removal needs on the construction site, and significantly improving construction efficiency.

[0024] II. Controllable Precision: The arc-shaped limiting rail precisely constrains the movement trajectory of the laser gun, ensuring that the laser focus remains stably focused on the surface of the pipe end requiring rust removal throughout the operation. This achieves uniform rust removal around the entire circumference, completely eliminating the problems of missed removal and over-etching caused by manual operation jitter and deviation. Simultaneously, combined with the selective absorption characteristics and self-limiting parameter design of the laser, the energy is precisely controlled between the rust removal threshold and the substrate damage threshold. This thoroughly removes rust while avoiding damage to the steel pipe substrate, ensuring the weldability of the surface of the pipe end requiring rust removal. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a laser rust removal device for the welded joint of a pipe end that can be self-limited.

[0026] Figure 2 This is a side view of the laser rust removal device;

[0027] Figure 3 This is a schematic diagram of the main structure of this laser rust removal device;

[0028] Figure 4 This is a cross-sectional view of the clamping part in this type of laser rust removal device;

[0029] Figure 5 yes Figure 4 A magnified view of part A in the middle;

[0030] Figure 6 This is a schematic diagram of the main structure of this laser rust removal device.

[0031] Figure 7 This is a schematic diagram of the clamping part installation;

[0032] In the diagram: 1. Steel pipe, 11. Pipe end requiring rust removal, 2. Main frame, 21. Limiting plate, 22. Operating window, 23. Track, 3. Sliding bracket, 4. Arc-shaped limiting rail, 5. Laser gun, 6. Adjusting bolt, 61. Hexagonal head, 62. Threaded section, 63. Guide column section, 64. Tail inclined block, 7. Arc-shaped clamping component, 8. Fixed arc-shaped plate, 9. Rotating bracket, 10. Dust suction pipe. Detailed Implementation

[0033] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0034] Example 1: As Figure 1-7 As shown, this embodiment provides a self-limiting laser rust removal device for the welded joint of a pipe end, which is suitable for rust removal operations before welding of steel pipe ends of various specifications.

[0035] The main frame 2 is the main body of the device. A fixed arc plate 8 is fixedly connected to the bottom of the main frame 2. The inner arc surface of the fixed arc plate 8 is adapted to the outer wall arc of the steel pipe 1 to be derusted, and can fit against the outer wall surface of the steel pipe 1 to be derusted, so as to achieve the radial preliminary positioning of the device.

[0036] A limiting plate 21 is fixedly installed at one axial end of the main frame 2. The limiting plate 21 is arranged perpendicular to the axial direction of the steel pipe 1 to be derusted and can abut against the end face of the steel pipe 1 to be derusted, so as to realize the axial self-limiting positioning of the device.

[0037] The bottom of the main frame 2 is equipped with a clamping mechanism, which includes two sets of arc-shaped clamping parts 7 and two sets of adjusting bolts 6. The two sets of arc-shaped clamping parts 7 are respectively located at both ends of the fixed arc-shaped plate 8. The adjusting bolts 6 are installed vertically through the threaded through holes opened on the main frame 2. The bottom end of the adjusting bolt 6 abuts against the upper inclined surface of the corresponding arc-shaped clamping part 7. By rotating the adjusting bolt 6, the arc-shaped clamping part 7 can be pushed to undergo flexible deformation, so that the arc-shaped clamping part 7 hugs the outer wall of the steel pipe 1 to be derusted inward, thus completing the firm clamping and fixing of the device and the steel pipe.

[0038] A through-type operating window 22 is provided in the middle of the main frame 2. After the device is positioned, the rust-removing surface 11 of the steel pipe 1 is exposed inside the operating window 22. Straight rails 23 are fixedly installed on both sides of the upper surface of the main frame 2, and sliding brackets 3 are slidably installed on the straight rails 23. The tops of the two sets of sliding brackets 3 are fixedly connected to an arc-shaped limiting rail 4. A laser gun 5 is slidably installed on the arc-shaped limiting rail 4 through a slider. The light-emitting end of the laser gun 5 is set towards the rust-removing surface 11 of the pipe end inside the operating window 22, and can slide along the arc-shaped limiting rail 4 to complete the local laser rust removal operation on the rust-removing surface 11 of the pipe end.

[0039] The complete usage method of the self-limiting laser rust removal device for pipe end weld joints in this embodiment is as follows:

[0040] S1. Pre-positioning operation: The fixed arc plate 8 at the bottom of the main frame 2 is attached to the outer wall of the end of the steel pipe 1 to be derusted. The main frame 2 is pushed along the axial direction of the steel pipe until the inner end face of the limiting plate 21 is completely abutted against the end face of the steel pipe, thus completing the axial and radial self-limiting positioning of the device. At this time, the rust-derusted surface 11 of the steel pipe end is exposed in the operating window 22, achieving precise alignment.

[0041] S2. Clamping and fixing operation: Use an Allen wrench to rotate the adjusting bolts 6 on both sides simultaneously. The tail wrench 64 pushes the arc-shaped clamping parts 7 inward to flexibly deform until both sides of the arc-shaped clamping parts 7 firmly hug the outer wall of the steel pipe, and the device is completely fixed to the end of the steel pipe without loosening or displacement.

[0042] S3. Rust Removal Operation: Start the laser gun 5 and push the slider at a constant speed to make a circular motion along the arc-shaped limit rail 4, which will drive the laser gun 5 to scan and remove rust along the surface of the pipe end that needs to be rusted. After a single circumference scan is completed, the position of the laser gun 5 can be finely adjusted along the axial direction of the straight track 23 to perform supplementary scans to ensure that no areas are missed.

[0043] S4. Device disassembly: After the rust removal operation is completed, turn off the laser gun 5, rotate the adjusting bolt 6 in the opposite direction to release the clamping force of the arc-shaped clamp 7 on the steel pipe, and then remove the device from the end of the steel pipe. Rotate the steel pipe to change the angle for rust removal.

[0044] Example 2:

[0045] The rust removal device, including the laser gun, remains stationary. The pipe, driven by a motor, rotates in a circular motion on the support. After completing one cycle of rust removal, the sliding support 3 moves towards the pipe end on the slide rail 23, and the position of the laser gun on the sliding support 3 is adjusted so that the laser gun's focus point is on the inner wall of the pipe for rust removal. The pipe, driven by a motor, rotates in a circular motion on the support. After completing one cycle of rust removal, the rust removal work is finished.

[0046] Example 3:

[0047] The sliding bracket 3 adopts a height-adjustable structure. By adjusting the vertical height of the sliding bracket 3, the radial distance between the arc-shaped limiting rail 4 and the steel pipe 1 to be derusted can be adjusted, thereby adapting to the laser focus position of different laser guns 5. The rest is the same as in Embodiment 1.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser rust removal device for a self-limiting welded joint at a pipe end, characterized in that, Includes the main frame, clamping mechanism, axial limiting assembly, and laser rust removal actuator; The bottom of the main frame is provided with a fixed arc-shaped plate that is adapted to the outer wall of the steel pipe to be derusted. The axial limiting component includes a limiting plate fixed to one axial end of the main frame. The limiting plate is set perpendicular to the axial direction of the steel pipe to be derusted. The clamping mechanism includes two sets of symmetrically arranged flexible arc-shaped clamping members and adjusting bolts that correspond to each of the arc-shaped clamping members. The two sets of arc-shaped clamping members are respectively located at both ends of the fixed arc-shaped plate. The adjusting bolts are installed on the main frame through threaded through holes. The bottom end of the adjusting bolt abuts against the inclined surface of the upper surface of the corresponding arc-shaped clamping member. By rotating the adjusting bolt, the arc-shaped clamping member can be pushed to undergo flexible deformation, so that the arc-shaped clamping member hugs the outer wall of the steel pipe to be derusted inward, thereby achieving the clamping and fixing of the device and the steel pipe. The main frame has a through-type operation window in the middle, and a laser rust removal actuator that can move back and forth and circumferentially is installed in the operation window.

2. The laser rust removal device for the self-limiting weld joint of a pipe end according to claim 1, characterized in that, The laser rust removal actuator includes two sets of sliding supports, an arc-shaped limiting rail, and a laser gun; The upper surface of the main frame is provided with linear tracks parallel to the axial direction of the steel pipe to be derusted on both sides of the operating window. The bottom ends of the two sets of sliding brackets are respectively slidably engaged with the linear tracks on both sides, and can slide back and forth along the axial direction of the steel pipe to be derusted. The two ends of the arc-shaped limiting rail are fixedly connected to the top of the sliding bracket, and the arc of the arc-shaped limiting rail is adapted to the circumferential trajectory of the rust-removed surface of the steel pipe end. The laser gun is slidably mounted on the arc-shaped limiting rail via a slider. The light-emitting end of the laser gun is positioned facing the rust-removing surface of the pipe end inside the operating window. By sliding the slider along the arc-shaped limiting rail, the laser gun is driven to move along the circumferential trajectory of the rust-removing surface of the pipe end, thereby realizing the laser rust removal operation on the rust-removing surface of the pipe end.

3. The laser rust removal device for the self-limiting weld joint of a pipe end according to claim 2, characterized in that, The adjusting bolt includes a hexagonal head, a threaded section, a guide post section, and a tail wedge block arranged coaxially in sequence; the threaded section is threadedly engaged with the threaded through hole on the main frame, and the bottom surface of the tail wedge block is a slope that fits against the slope of the upper surface of the arc-shaped clamping member.

4. The laser rust removal device for the self-limiting weld joint of a pipe end according to claim 2, characterized in that, The arc-shaped clamp is an arc-shaped plate structure made of elastic metal. One end of the arc-shaped clamp is fixedly connected to the end of the fixed arc plate, and the other end is a free end. Under the push of the adjusting bolt, the free end can flexibly deform in the axial direction of the steel pipe to be derusted.

5. The laser rust removal device for the self-limiting weld joint of a pipe end according to claim 2, characterized in that, The plane containing the arc-shaped limiting rail is perpendicular to the axial direction of the steel pipe to be derusted, and the center of the arc-shaped limiting rail coincides with the axis of the steel pipe to be derusted, so that when the laser gun slides along the arc-shaped limiting rail, the distance between its light-emitting end and the surface of the pipe end to be derusted remains constant.

6. The laser rust removal device for the self-limiting weld joint of a pipe end according to claim 5, characterized in that, The sliding bracket is a height-adjustable bracket used to adjust the radial distance between the arc-shaped limiting rail and the steel pipe to be derusted, thereby adjusting the laser focus position of the laser gun.

7. The self-limiting laser rust removal device for pipe end welds according to claim 1, characterized in that, The operating window is a rectangular through-slot structure. The axial length of the operating window is greater than the axial width of the rust-removing surface of the steel pipe end. The circumferential width of the operating window covers the entire circumference of the rust-removing surface of the steel pipe end.

8. The self-limiting laser rust removal device for pipe end welds according to claim 1, characterized in that, The main frame, fixed arc plate, sliding bracket, and arc-shaped limit rail are all made of aluminum alloy.

Images