A laser repair lathe applied to equipment processing

Abstract

The application relates to the technical field of laser welding repair, and discloses a laser repair lathe applied to equipment machining, which comprises a lathe body, a clamp arranged on the lathe body, a to-be-repaired piece arranged on the clamp, a machining device arranged on one side of the lathe body, and a repairing device arranged on the other side of the lathe body; the repairing device comprises a moving block arranged on one side of the lathe body, a mounting block arranged on the top of the moving block, a laser repair gun arranged on one side of the mounting block, a supporting plate arranged on the side of the moving block close to the to-be-repaired piece, a wire feeding mechanism arranged on the top of the supporting plate, and a back-pulling mechanism arranged on one side of the wire feeding mechanism. The back-pulling mechanism is driven by spring elastic force to rapidly back-pull the wire penetrating rod, dynamic force increasing clamping of the inclined rubber and the abutting rubber is matched, the end of the welding wire is ensured to be separated from the high-temperature area of the molten pool, the problem of adhesion is solved, and defects such as air holes and incomplete fusion are reduced.

Description

A laser repair lathe for equipment processing Technical Field

[0001] This invention relates to the field of laser welding repair technology, and in particular to a laser repair lathe used in equipment processing. Background Technology

[0002] In the field of equipment processing, the direct scrapping of high-value workpieces due to defects such as wear and cracks results in a huge waste of resources. Laser repair technology, with its advantages of accurately filling defects and restoring the mechanical properties of workpieces, has become a key means of extending workpiece life. However, traditional laser repair equipment has significant technical bottlenecks: the wire feeding mechanism mostly uses a single roller or guide tube to push the welding wire, lacking an effective retraction mechanism. When the repair is paused or ended, the end of the welding wire is easily adhered to the solidified repair layer due to continuous exposure to the high temperature zone of the molten pool, forming a "cold weld bead" or "metal bridge".

[0003] This adhesion not only causes wire positioning misalignment during subsequent wire feeding, leading to energy imbalance in the molten pool and defects such as porosity and incomplete fusion, but also requires manual shutdown for cleaning, significantly reducing operational efficiency. Simultaneously, issues such as air pressure fluctuations and lateral force interference are common during wire feeding, resulting in poor wire delivery accuracy and difficulty in adapting to various wire specifications. Furthermore, insufficient equipment sealing performance makes it susceptible to dust intrusion, accelerating component wear and reducing maintenance cycles. This makes it difficult to meet the stringent requirements for repair accuracy and stability in fields such as aerospace and precision molds. Therefore, there is an urgent need to overcome traditional design limitations and develop new laser repair equipment with efficient wire feeding control and anti-adhesion functions. Summary of the Invention

[0004] Given the existing technical problems of traditional laser repair equipment, such as the lack of a retraction mechanism, easy adhesion of welding wire leading to defects, poor wire feeding accuracy, low adaptability, and insufficient sealing resulting in rapid component wear and short maintenance cycles, which make it difficult to meet the needs of high-precision repair, a laser repair lathe for equipment processing is proposed.

[0005] Its purpose is to solve problems such as wire adhesion, poor precision, low compatibility, and cumbersome maintenance in traditional equipment, and to improve the effect and efficiency of laser repair.

[0006] The technical solution of the present invention is a laser repair lathe applied to equipment processing, including a lathe body, a fixture disposed on the lathe body, a workpiece to be repaired disposed on the fixture, a processing device disposed on one side of the lathe body, and a repair device disposed on the other side of the lathe body.

[0007] The repair device includes a movable block disposed on one side of the lathe body, a mounting block disposed on the top of the movable block, a laser repair gun disposed on one side of the mounting block, a support plate disposed on the side of the movable block near the workpiece to be repaired, a wire feeding mechanism disposed on the top of the support plate, and a retraction mechanism disposed on one side of the wire feeding mechanism.

[0008] The wire feeding mechanism is used to deliver welding wire. The retraction mechanism includes two fixed frames, a fixed sleeve set on the top of the fixed frame, a wire threading rod set inside the fixed sleeve, a copper nozzle set at one end of the wire threading rod, welding wire set in the wire feeding mechanism, the fixed sleeve and the copper nozzle, and an air inlet pipe set on one side of the top of the fixed sleeve. One end of the air inlet pipe is connected to the internal cavity of the fixed sleeve, and the other end of the air inlet pipe is connected to an external air pressure device.

[0009] Furthermore, a sealing plate is provided at one end of the threading rod located inside the cavity, and a spring is provided on one side of the sealing plate. One end of the spring is located inside the cavity, and the spring is sleeved on the threading rod. The sealing plate is slidably connected in a sealing manner within the cavity.

[0010] Furthermore, a limiting groove is formed on the side wall of one end of the threading rod, and a limiting block is formed inside the fixed sleeve in a ring shape. The limiting block is slidably connected within the limiting groove.

[0011] Furthermore, the wire threading rod has an annular groove inside, and clamping components are arranged in a linear array inside the annular groove. The clamping components include inclined rubber and abutting rubber arranged in an annular array inside the annular groove. The inclined rubber is longer than the abutting rubber, and the abutting rubber abuts against the inclined rubber. The inclined rubber is slidably connected to the welding wire.

[0012] Furthermore, the sidewall of the fixed sleeve is also provided with an arc-shaped micro-hole in a ring array, one end of which is connected to the cavity, and the end connected to the cavity is provided with an expansion groove.

[0013] Furthermore, the wire feeding mechanism includes two fixed plates mounted on the support plate, two rollers mounted between the two fixed plates, gears mounted on one side of each roller, the two gears meshing with each other, a motor mounted on one side of the bottom gear, and the welding wire located between the two rollers.

[0014] Furthermore, the line connecting the centers of the two rollers is perpendicular to the axis of the fixed sleeve.

[0015] Furthermore, the limiting groove does not extend to the sealing plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The retraction mechanism uses spring force to drive the wire threading rod to quickly retract, combined with the dynamic force-increasing clamping of the inclined and abutting rubber, ensuring that the welding wire tip is detached from the high-temperature zone of the molten pool, solving the adhesion problem, reducing defects such as porosity and incomplete fusion, and ensuring that the mechanical properties of the repaired part are close to those of the original part. Stable air pressure closed-loop control and vertical wire feeding layout reduce fluctuations in wire feeding accuracy and molten pool alignment errors, meeting the needs of high-precision repair and significantly improving repair quality and stability.

[0018] 2. The arc-shaped micro-hole self-cleaning design reduces impurity intrusion, lowers component wear rate, and extends maintenance cycle. The protective structure of the limiting groove and sealing plate protects core components such as springs. The clamping assembly is compatible with multiple sizes of welding wire, eliminating the need for frequent parts replacement, shortening debugging time, and automating the retraction process to reduce manual intervention and lower the risk of high-temperature operation. Attached Figure Description

[0019] Figure 1 is a three-dimensional structural diagram of the lathe body of the present invention;

[0020] Figure 2 is a partial structural schematic diagram of the repair device of the present invention;

[0021] Figure 3 is a schematic diagram of the overall three-dimensional structure of the repair device of the present invention;

[0022] Figure 4 is a half-sectional view of the overall retraction mechanism of the present invention;

[0023] Figure 5 is an enlarged structural schematic diagram of point A in Figure 4 of the present invention;

[0024] Figure 6 is an exploded structural diagram of the retraction mechanism of the present invention;

[0025] Figure 7 is a schematic diagram of the overall structure of the clamping assembly of the present invention;

[0026] Figure 8 is a schematic diagram of the overall structure of the inclined rubber and the abutting rubber of the present invention;

[0027] Figure 9 is a front view of the repair device of the present invention.

[0028] Figure 10 is a schematic diagram of the overall structure of the wire feeding mechanism of the present invention.

[0029] In the picture:

[0030] 1. Lathe body; 11. Fixture; 12. Part to be repaired; 13. Machining device; 14. Repair device; 15. Moving block; 16. Laser repair gun; 17. Support plate; 2. Retraction mechanism; 21. Fixing frame; 22. Fixing sleeve; 23. Threading rod; 24. Copper nozzle; 25. Welding wire; 26. Air inlet pipe; 27. Sealing plate; 28. Spring; 3. Limiting groove; 4. Limiting block; 5. Clamping assembly; 51. Inclined rubber; 52. Abutting rubber; 6. Arc-shaped micro hole; 7. Expansion groove; 8. Wire feeding mechanism; 81. Fixing plate; 82. Roller; 83. Gear; 84. Motor. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Example 1, referring to Figures 1-10, is the first embodiment of the present invention, providing a laser repair lathe for equipment processing, including a lathe body 1, a fixture 11 disposed on the lathe body 1, a workpiece 12 clamped on the fixture 11, a processing device 13 disposed on one side of the lathe body 1, and a repair device 14 disposed on the other side of the lathe body 1; the repair device 14 includes a moving block 15 movably connected to one side of the lathe body 1, a mounting block slidably connected to the top of the moving block 15, a laser repair gun 16 fixedly connected to one side of the mounting block, a support plate 17 fixedly connected to the moving block 15 near the workpiece 12, and a wire feeding mechanism 8 disposed on the top of the support plate 17. The bottom of the wire feeding mechanism 8 is connected to a sliding plate, which can slide on the support plate 17 with adjustable distance, and a retraction mechanism 2 is set on one side of the wire feeding mechanism 8. The wire feeding mechanism 8 is used to deliver welding wire 25. The retraction mechanism 2 includes two fixed frames 21 set on the top of the sliding plate, a fixed sleeve 22 fixedly connected to the top of the fixed frame 21, a wire threading rod 23 slidably connected inside the fixed sleeve 22, a copper nozzle 24 threadedly connected to one end of the wire threading rod 23, welding wire 25 slidably connected to the wire feeding mechanism 8, the fixed sleeve 22 and the copper nozzle 24, and an air inlet pipe 26 fixedly connected to one side of the top of the fixed sleeve 22. One end of the air inlet pipe 26 is connected to the internal cavity of the fixed sleeve 22, and the other end of the air inlet pipe 26 is connected to an external air pressure device.

[0033] Specifically, when repairing the workpiece 12, the moving block 15 and the mounting block are driven to the appropriate position, so that the laser repair gun 16 is aligned with the area to be repaired on the workpiece 12. The clamp 11 is driven to rotate the workpiece 12, and the wire feeding mechanism 8 continuously feeds the wire through the retraction mechanism 2, thereby achieving laser repair. During operation, the air pressure device connected to one end of the air inlet pipe 26 uses a high-precision air compressor as the air source. Its output pressure can be stabilized at 0.3-0.5MPa through the pressure regulating valve, and it is equipped with a large-capacity air tank (volume ≥50L), which can effectively buffer air pressure fluctuations and control the instantaneous fluctuation of the output air pressure within ±0.02MPa. At the same time, a three-stage filtration device (including an oil-water separator, a precision filter, and a dryer) is installed at the air source outlet to ensure the cleanliness of the compressed air entering the wire feeding nozzle structure and avoid impurities clogging the air passage or affecting the life of the components. From the air tank to the compressed air inlet of the wire feeding nozzle rear end cover, a solenoid valve, a flow control valve, and a pressure sensor are installed in sequence. The solenoid valve is a two-position five-way type with a response time of <10ms, which can quickly connect or disconnect the gas path. The flow control valve can accurately regulate the gas flow rate, and together with the pressure sensor (measurement accuracy ±0.01MPa) to monitor the gas path pressure in real time, a closed-loop control is formed. When the gas pressure is detected to be lower than the set value, the control system will automatically adjust the flow control valve to increase the air intake, and vice versa, to ensure that the gas pressure acting on the threading rod 23 is always stable.

[0034] When the external compressed air source is turned on, compressed air enters the cavity of the fixed sleeve 22 through the air inlet pipe 26. The thrust generated by the high-pressure gas overcomes the elastic force of the spring 28, pushing the wire feeding rod 23 forward and driving the welding wire 25 to be fed into the molten pool at a set speed. During this process, the spring 28 is continuously compressed, storing elastic potential energy, and the stable force of the compressed air ensures the smoothness of the wire feeding process. When the laser repair cavity receives a stop welding signal, the control system immediately cuts off the compressed air supply. At this time, the compressed spring 28 quickly releases the stored elastic potential energy, generating a strong reverse elastic force, driving the wire feeding rod 23 to move backward quickly, driving the welding wire 25 to retract, ensuring that the end of the welding wire 25 is completely separated from the high-temperature zone of the molten pool, and avoiding adhesion.

[0035] The precise movement of the retraction mechanism 2 solves the problem of welding wire 25 adhesion at its root. When welding stops, the threading rod 23 is rapidly retracted under the force of the spring 28. Combined with the tapered guide design of the copper nozzle 24, this ensures that the end of the welding wire 25 instantly detaches from the high-temperature zone of the molten pool, avoiding "cold welding adhesion" or "molten droplet residue" caused by residual heat. This directly reduces defects such as porosity and incomplete fusion in the repair layer, making the mechanical properties (such as bonding strength and hardness) of the repaired part closer to the level of the original part. It is especially suitable for scenarios with extremely high requirements for repair quality, such as aerospace and precision molds, improving repair quality and reducing defects. The automated movement of the retraction mechanism 2 eliminates the need for operators to manually clean the adhered welding wire 25, reducing the risk of high-temperature burns.

[0036] Referring to Figures 4-6, a sealing plate 27 is slidably connected to one end of the threading rod 23 located in the cavity. A spring 28 is fixedly connected to one side of the sealing plate 27. One end of the spring 28 is fixedly connected to the inside of the cavity. The spring 28 is sleeved on the threading rod 23. The sealing plate 27 is slidably connected in a sealing manner within the cavity.

[0037] Specifically, when compressed air enters the cavity, it pushes the sealing plate 27 to move, and the sealing plate 27 compresses the spring 28. Since the compressed air can be output stably, the compression force on the spring 28 can be stabilized, which improves the quality and stability of laser repair.

[0038] Referring to Figures 5 and 6, a limiting groove 3 is formed on the side wall of one end of the threaded rod 23, and a limiting block 4 is fixedly connected to the inside of one end of the fixing sleeve 22. The limiting block 4 is slidably connected within the limiting groove 3.

[0039] Specifically, the sliding stroke of the limiting block 4 within the limiting groove 3 strictly limits the axial movement range of the threading rod 23. When the threading rod 23 is pushed forward by air pressure to feed the wire, the limiting block 4 stops upon contacting the front end face of the limiting groove 3, preventing the threading rod 23 from overextending due to abnormal air pressure increases, and avoiding rigid collisions between the copper nozzle 24 and the workpiece 12 (especially in precision repair scenarios, this protects the workpiece surface from scratches), thus protecting the spring 28. During retraction, the limiting block 4 contacts the rear end face of the limiting groove 3, preventing the threading rod 23 from moving excessively backward due to excessive spring force of the spring 28, and preventing the rear end of the threading rod 23 from impacting the fixed sleeve 22 component and causing deformation. This achieves bidirectional stroke protection from a mechanical structure perspective, reducing the risk of equipment damage due to misoperation or abnormal parameters. It also eliminates radial wobble and improves motion coaxiality.

[0040] Referring to Figures 7-8, an annular groove is provided inside the threading rod 23. Clamping components 5 are arranged in a linear array inside the annular groove. The clamping components 5 include inclined rubber 51 and abutting rubber 52, which are fixedly connected in an annular array inside the annular groove. The inclined rubber 51 is longer than the abutting rubber 52, and the abutting rubber 52 abuts against the inclined rubber 51. The inclined rubber 51 is slidably connected to the welding wire 25.

[0041] Specifically, when the welding wire 25 enters the threading rod 23, because the inclined rubber 51 is longer than the abutment rubber 52, the inclined rubber 51 bends and squeezes the abutment rubber 52, allowing the welding wire 25 to pass smoothly. During retraction, the abutment rubber 52 deforms and recovers, increasing the deformation recovery force generated by the inclined rubber 51, thus increasing the pulling force of the inclined rubber 51 on the welding wire 25 during retraction. At the instant of retraction, the abutment rubber 52 rapidly deforms and recovers due to the reverse force generated by the backward movement of the threading rod 23. Its elastic potential energy is converted into a lateral thrust on the inclined rubber 51, causing the inclined rubber 51 to tighten towards the center, resulting in a sharp increase in the clamping force on the welding wire 25. This dynamic force-enhancing effect significantly improves the pulling force on the welding wire 25, especially for welding wires with smooth surfaces (such as copper-plated welding wire 25), effectively preventing slippage and solving the end residue problem caused by the inability to pull the welding wire 25 during retraction in traditional clamping structures. During the retraction, the coordinated deformation of the inclined rubber 51 and the abutting rubber 52 forms a "secondary buffer." The inclined rubber 51 first absorbs part of the impact energy through its own elasticity, and the remaining energy is further buffered by the deformation of the abutting rubber 52, reducing the instantaneous tensile force on the welding wire 25. This is especially important for low-strength welding wires 25 (such as aluminum alloy welding wires 25), as it can prevent the welding wire 25 from breaking due to excessive retraction impact force, reducing the secondary repair costs caused by welding wire 25 breakage. In addition, it can also adapt to the welding needs of welding wires 25 of different diameters.

[0042] Referring to Figure 4, the side wall of the fixing sleeve 22 is also provided with an arc-shaped micro-holes 6 in a ring array. One end of the holes is connected to the cavity, and the end connected to the cavity is provided with an expansion groove 7. The expansion groove 7 facilitates the entry of debris and its removal.

[0043] Specifically, although the cavity (the space between the fixed sleeve 22 and the threading rod 23) is a closed structure, a "dynamic exhaust balance" design prevents continuous pressure increases. Because compressed gas is continuously input into the cavity through the air circuit system, the arc-shaped micro-holes 6 prevent sudden pressure increases inside the cavity from causing instability in wire feeding. This allows the spring 28 to maintain its compressed equilibrium, accelerating pressure relief and improving the retraction response speed. Furthermore, it works in conjunction with a flow control valve and a pressure sensor to provide real-time feedback: when the sensor detects that the cavity pressure exceeds a set value, the control system reduces the opening of the flow control valve, decreasing the air intake; if the pressure is below the threshold, the air intake is increased, always maintaining the pressure within a fluctuation range of ±0.02 MPa, thereby enhancing the stability of wire feeding. In addition, a small amount of leakage (0.05-0.1 mm) occurs between the threading rod 23 and the inner wall of the fixed sleeve 22. This leakage is designed as "controllable leakage," which not only prevents sudden pressure increases but also forms an air film lubrication at the gap, reducing friction during rod movement. In addition, when the air pressure inside the cavity decreases during the retraction, the sealing plate 27 generates a centrifugal force effect as it moves within the cavity, causing fine debris and dust mixed into the cavity to be flung out through the arc-shaped micro-holes 6, thus improving the cleanliness and service life of the interior.

[0044] Example 2, referring to Figure 10, is the second embodiment of the present invention. This embodiment differs from the first embodiment in that: the wire feeding mechanism 8 includes two fixed plates 81 fixedly connected to the support plate 17, two rollers 82 rotatably connected between the two fixed plates 81, and gears 83 fixedly connected to one side of the two rollers 82 respectively through rotating shafts. The two gears 83 are meshed with each other, and a motor 84 is fixedly connected to one side of the bottom gear 83. The welding wire 25 is located between the two rollers 82.

[0045] Specifically, the motor 84 drives two gears 83 to rotate, and the rotation of the gears 83 drives two rollers 82 to rotate in opposite directions, thereby conveying the welding wire 25 and achieving stable power transmission to ensure uniform wire feeding speed.

[0046] Referring to Figure 9, the line connecting the centers of the two rollers 82 is perpendicular to the axis of the fixed sleeve 22.

[0047] Specifically, the vertical layout ensures that the clamping force (radial) of the roller 82 on the welding wire 25 is completely perpendicular to the axis of the fixed sleeve 22 (the feeding direction of the welding wire 25), thus avoiding lateral force. In a conventional inclined layout, lateral force may cause the welding wire 25 to bend slightly within the threading rod 23, reducing frictional loss between the welding wire 25 and the threading rod 23, enhancing coordination during retraction, and preventing the welding wire 25 from bending.

[0048] Referring to Figure 5, the limiting groove 3 is not opened to the sealing plate 27.

[0049] Specifically, it is used to protect the spring 28 and prevent it from being compressed to its limit and damaged. The rest of the structure is the same as that in Embodiment 1.

[0050] Based on embodiments 1-2, the working principle of this invention is as follows: When the laser repair lathe is working, the position of the laser repair gun 16 is first adjusted by the moving block 15 and the mounting block to align it with the area to be repaired on the workpiece 12. The clamp 11 drives the workpiece 12 to rotate. In the wire feeding mechanism 8, the motor 84 drives the gear 83 to drive the two rollers 82 to rotate in opposite directions. The rollers 82, perpendicular to the axis of the fixed sleeve 22, stably feed the welding wire 25 to the return mechanism 2. Compressed air enters the cavity of the fixed sleeve 22 through the air inlet pipe 26, pushing the sealing plate 27 to compress the spring 28, causing the threading rod 23 to move forward. The inclined rubber 51 and the abutting rubber 52 inside the threading rod 23 cooperate to clamp the welding wire 25 and feed it to the molten pool. The arc-shaped micro-hole 6 and the expansion groove 7 of the fixed sleeve 22 balance the air pressure, and the limiting block 4 and the limiting groove 3 limit the stroke of the threading rod 23. When the repair is stopped, the air pressure is cut off, the spring 28 returns to its original position and drives the threading rod 23 to retract. The deformation of the abutment rubber 52 causes the inclined rubber 51 to strengthen the clamping, ensuring that the welding wire 25 retracts synchronously, avoiding adhesion, and achieving efficient and precise repair.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser repair lathe for equipment processing, comprising a lathe body (1), a fixture (11) disposed on the lathe body (1), a workpiece (12) disposed on the fixture (11), and a processing device (13) disposed on one side of the lathe body (1), characterized in that: It also includes a repair device (14) located on the other side of the lathe body (1); the repair device (14) includes a moving block (15) located on one side of the lathe body (1), a mounting block located on the top of the moving block (15), a laser repair gun (16) located on one side of the mounting block, a support plate (17) located on the side of the moving block (15) near the workpiece (12) to be repaired, a wire feeding mechanism (8) located on the top of the support plate (17), and a retraction mechanism (2) located on one side of the wire feeding mechanism (8); the wire feeding mechanism (8) is used to deliver welding wire (25), and the retraction mechanism (2) includes two fixed frames (21), a fixed sleeve (22) located on the top of the fixed frame (21), a wire threading rod (23) located inside the fixed sleeve (22), and a wire threading rod (23) located on the wire threading rod (24). 23) A copper nozzle (24) at one end, a welding wire (25) in the wire feeding mechanism (8) and the fixed sleeve (22) and the copper nozzle (24), and an air inlet pipe (26) on one side of the top of the fixed sleeve (22). One end of the air inlet pipe (26) is connected to the cavity inside the fixed sleeve (22), and the other end of the air inlet pipe (26) is connected to an external air pressure device. The wire threading rod (23) has an annular groove inside, and a clamping assembly (5) is arranged in a linear array in the annular groove. The clamping assembly (5) includes an inclined rubber (51) and an abutting rubber (52) arranged in an annular array in the annular groove. The inclined rubber (51) is longer than the abutting rubber (52), and the abutting rubber (52) abuts against the inclined rubber (51). The inclined rubber (51) is slidably connected to the welding wire (25).

2. The laser repair lathe for equipment processing according to claim 1, characterized in that: The threading rod (23) is provided with a sealing plate (27) at one end inside the cavity. A spring (28) is provided on one side of the sealing plate (27). One end of the spring (28) is located inside the cavity. The spring (28) is sleeved on the threading rod (23). The sealing plate (27) is sealed and slidably connected inside the cavity.

3. The laser repair lathe for equipment processing according to claim 1, characterized in that: The threading rod (23) has a circumferential groove (3) on one side wall, and a circumferential block (4) is provided inside one end of the fixing sleeve (22). The circumferential block (4) slides within the circumferential groove (3).

4. The laser repair lathe for equipment processing according to claim 1, characterized in that: The side wall of the fixed sleeve (22) is also provided with an arc-shaped micro-hole (6) in an annular array, one end of which is connected to the cavity, and the end of which is connected to the cavity is provided with an expansion groove (7).

5. The laser repair lathe for equipment processing according to claim 1, characterized in that: The wire feeding mechanism (8) includes two fixed plates (81) on the support plate (17), two rollers (82) between the two fixed plates (81), gears (83) respectively on one side of the two rollers (82), the two gears (83) meshing with each other, a motor (84) is provided on one side of the bottom gear (83), and the welding wire (25) is located between the two rollers (82).

6. The laser repair lathe for equipment processing according to claim 5, characterized in that: The line connecting the centers of the two rollers (82) is perpendicular to the axis of the fixed sleeve (22).

7. The laser repair lathe for equipment processing according to claim 3, characterized in that: The limiting groove (3) is not opened to the sealing plate (27).

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