Laser processing device with curved surface part positioning mechanism and method

Abstract

The invention relates to the technical field of laser machining, in particular to a laser machining device and method with a curved surface part positioning mechanism, a curved surface part is arranged below laser machining equipment, and a track recognition module used for conducting track recognition on a machining area of the laser machining equipment is installed on one side of a welding frame body; curved surface positioning modules which are uniformly distributed are mounted above the positioning base plate, curved surface parts are arranged above the curved surface positioning modules, and a curved surface part cooling module is further mounted above the positioning base plate; a curved-surface part cooling module is mounted on the upper surface of the positioning base plate, and when surface machining is conducted on a curved-surface part, a second controllable lifting unit drives an attaching hose to move upwards; the attaching hose is of a flexible structure, heat is taken away through a cooling medium circulating in the attaching hose, rapid cooling and shaping of a welding area are achieved, molten metal liquid is made to be formed along a preset track, and the machining precision and the forming quality of the curved surface part are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of laser processing technology, specifically to a laser processing apparatus and method with a curved surface part positioning mechanism. Background Technology

[0002] Laser processing is an advanced manufacturing technology that uses the interaction between a high-energy-density laser beam and materials to remove, join, modify, or shape materials. Its core is the non-contact photothermal / photochemical effect, which has advantages such as high precision, high flexibility, and small heat-affected zone. It is widely used in some parts processing fields.

[0003] However, in the process of machining parts, planar parts are the main focus. When machining curved parts, the following technical problems are prone to occur: when using a high energy density beam to heat and melt the surface of a curved part, the molten metal will shift before it cools down due to the continuous machining process, resulting in uneven flow. In particular, it is easy to gather along the lower part of the curved surface and deviate from the preset forming position, which seriously affects the machining accuracy and forming quality of the curved part. Therefore, in order to solve the above problems, a laser processing device and method with a curved part positioning mechanism is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a laser processing apparatus and method with a curved surface part positioning mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: As an optional embodiment of the laser processing apparatus and method with a curved part positioning mechanism described in this invention, the laser processing apparatus and method with a curved part positioning mechanism includes a processing frame, a processing platform, a welding frame, and laser processing equipment. A flat processing platform is fixedly connected to the top of the processing frame, and a welding frame is fixedly connected above the processing platform. A laser processing device is installed at the bottom of the welding frame, and a curved part is installed below the laser processing device. A trajectory recognition module for trajectory recognition of the processing area of ​​the laser processing device is installed on one side of the welding frame, and a control module is installed on the other side of the welding frame. The processing frame is equipped with an up-and-down lifting mechanism, a longitudinal moving mechanism is installed above the up-and-down lifting mechanism, a transverse moving mechanism is installed above the longitudinal moving mechanism, a positioning base plate is installed above the transverse moving mechanism, a uniformly distributed curved positioning module is installed above the positioning base plate, a curved part is set above the curved positioning module, and a curved part cooling module is also installed above the positioning base plate. The curved part cooling module includes a second controllable lifting unit that is fixedly connected to the positioning base plate. The free end of the second controllable lifting unit is fixedly connected to a flexible fitting hose. Both ends of the flexible fitting hose are connected to connecting pipes. The other end of one connecting pipe is connected to a water tank, and the other end of the other connecting pipe is connected to a water pump. The outside of the water pump is fixedly connected to the water tank.

[0006] As an optional embodiment of the laser processing device and method with a curved part positioning mechanism described in this invention, a water supply pipe is connected to one side of the water tank, and a water replenishment device is connected to the other end of the water supply pipe.

[0007] As an optional embodiment of the laser processing device and method with a curved part positioning mechanism described in this invention, a plurality of pressure detection units are fixedly connected to the top of the fitting hose, and all pressure detection units are located directly above the second controllable lifting unit.

[0008] As an optional embodiment of the laser processing apparatus and method with a curved part positioning mechanism described in this invention, the bonding hose is made of a flexible thermally conductive silicone sheet, and the cross-section of the bonding hose is rectangular.

[0009] As an optional embodiment of the laser processing apparatus and method with a curved surface part positioning mechanism described in this invention, it includes the following steps: Step 1: Place the curved part above the curved positioning module, and use multiple curved positioning modules to perform negative pressure adsorption on the curved part; Step 2: By activating the curved part cooling module, move the flexible hose of the curved part cooling module to make it in close contact with one side of the curved part: Step 3: The trajectory recognition module scans the inner side of the curved part to plan the welding path. The control module controls the up-and-down lifting mechanism, the longitudinal movement mechanism, and the lateral movement mechanism to ensure that the welding area is always focused on one point. Step 4: Activating the curved part cooling module can cool one side of the curved part, ensuring rapid cooling and solidification of the molten metal. In the machining of parts, planar parts are the most common. However, when machining curved parts, the following technical problems may arise: When using a high-energy-density laser beam to heat and melt the surface of a curved part, the molten metal may shift before it cools down due to the continuous machining process, resulting in uneven flow. This is especially true as the molten metal tends to converge at the lower part of the curved surface and deviate from the preset forming position, which seriously affects the machining accuracy and forming quality of the curved part. A curved part cooling module is installed on the upper surface of the positioning substrate. When machining the surface of the curved part, the second controllable lifting unit drives the bonding hose to move upward. The bonding hose has a flexible structure that can fit tightly against the back of the curved part. During the laser welding process of the curved part, the cooling medium flowing inside the bonding hose carries away the heat, achieving rapid cooling and shaping of the welding area. This allows the molten metal to form along the preset trajectory, ensuring the machining accuracy and forming quality of the curved part.

[0010] A pressure detection unit is located above the second controllable lifting unit. This unit contacts the side of the curved part and collects pressure signals to ensure stable contact between the hose and the curved part, thereby improving heat exchange efficiency. By controlling the start and stop of the second controllable lifting unit at different positions, the contact area between the hose and the curved part can be adjusted, enabling zoned cooling for different welding conditions.

[0011] As an optional solution of the laser processing apparatus and method with a curved surface part positioning mechanism described in this invention, the curved surface positioning modules are arranged in multiple ways, and each curved surface positioning module includes a telescopic cylinder that is fixedly connected to the positioning base plate. The telescopic cylinder is provided with a first controllable lifting unit inside. The bottom of the first controllable lifting unit is fixedly connected to the positioning base plate, and the top of the first controllable lifting unit is fixedly connected to the telescopic cylinder. The top of the telescopic cylinder is fixedly connected to a flexible connector, and the top of the flexible connector is fixedly connected to a sealing ring. The outer side of the first controllable lifting unit is fixedly connected with a fixing ring, and the inside of the fixing ring is fixedly connected with a connecting air pipe. One end of the connecting air pipe is connected to a flexible connector, and the other end of the connecting air pipe is connected to an inflation air pipe, and the other end of the inflation air pipe is connected to a vacuum pump device.

[0012] As an optional embodiment of the laser processing apparatus and method with a curved part positioning mechanism described in this invention, an electromagnetic valve is installed on the outer side of each connecting air pipe, the upper part of the connecting air pipe of the fixing ring is rigidly structured, and the lower part of the connecting air pipe of the fixing ring is flexiblely structured.

[0013] As an optional embodiment of the laser processing apparatus and method with a curved part positioning mechanism described in this invention, the sealing ring is arranged in a ring shape, and the upper end face of the sealing ring is inclined.

[0014] Traditionally, curved parts are fixed using clamping methods, which can easily generate clamping stress on the parts, especially thin metal curved parts, causing deformation and affecting the overall shape accuracy after laser welding. This device is equipped with multiple curved surface positioning modules. The telescopic cylinder is driven to extend through the first controllable lifting unit at the corresponding position, moving the flexible connector and the upper sealing ring upward to fit against the curved surface part. An external vacuum pump operates, causing the flexible connector and the sealing ring to cooperate to form a negative pressure adsorption, thereby achieving the positioning and fixation of the curved surface part. The multi-point distributed curved surface positioning modules can maintain the original shape of the curved surface part, ensuring the overall quality after welding. The sealing ring is inclined on one side, which can adaptively fit the curved contour of the curved surface part, achieving circumferential sealing and improving the reliability of adsorption and fixation.

[0015] The connecting air tube adopts a segmented structure: the upper section of the fixed ring is a rigid structure, and the lower section of the fixed ring is a flexible structure. This facilitates the free extension and retraction of the first controllable lifting unit and avoids interference between the rigid structure and the flexible connector, ensuring accurate positioning and stable adsorption of curved parts.

[0016] Compared with the prior art, the beneficial effects of the present invention are: A curved part cooling module is installed on the upper surface of the positioning substrate. When the curved part is surface-processed, the second controllable lifting unit drives the bonding hose to move upward. The bonding hose is a flexible structure that can be tightly bonded to the back of the curved part. During the laser welding process of the curved part, the heat is carried away by the cooling medium flowing inside the bonding hose, so as to achieve rapid cooling and shaping of the welding area, and make the molten metal liquid form along the preset trajectory, ensuring the processing accuracy and forming quality of the curved part.

[0017] A pressure detection unit is located above the second controllable lifting unit. This unit contacts the side of the curved part and collects pressure signals to ensure stable contact between the hose and the curved part, thereby improving heat exchange efficiency. By controlling the start and stop of the second controllable lifting unit at different positions, the contact area between the hose and the curved part can be adjusted, enabling zoned cooling for different welding conditions.

[0018] Traditionally, curved parts are fixed using clamping methods, which can easily generate clamping stress on the parts, especially causing deformation of thin metal curved parts, affecting the overall shape accuracy after laser welding. This device is equipped with multiple curved surface positioning modules. The telescopic cylinder is extended by the first controllable lifting unit at the corresponding position, which moves the flexible connector and the upper sealing ring upward to fit against the curved surface part. An external vacuum pump works, causing the flexible connector and the sealing ring to cooperate to form a negative pressure adsorption, thereby achieving the positioning and fixation of the curved surface part. The multi-point distributed curved surface positioning modules can maintain the original shape of the curved surface part, solving the clamping stress and deformation problems caused by traditional clamping positioning for thin curved parts, and ensuring the shape accuracy of the part.

[0019] The sealing ring is arranged at an angle on one side, which can adaptively fit the curved contour of the curved part, achieve circumferential sealing and fit, and improve the reliability of adsorption and fixation.

[0020] The connecting air tube adopts a segmented structure: the upper section of the fixed ring is a rigid structure, and the lower section of the fixed ring is a flexible structure. This facilitates the free extension and retraction of the first controllable lifting unit and avoids interference between the rigid structure and the flexible connector, ensuring accurate positioning and stable adsorption of curved parts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a laser processing device and method with a curved surface part positioning mechanism; Figure 2 This is a schematic diagram of the structure of a laser processing device and method for positioning a substrate, which has a curved surface part positioning mechanism. Figure 3 This is a schematic diagram of the curved surface positioning module of a laser processing device and method with a curved surface part positioning mechanism; Figure 4 This is a schematic diagram of the sealing ring structure of a laser processing device and method with a curved part positioning mechanism; Figure 5 This is a schematic diagram of the structure of a laser processing device and method with a curved part positioning mechanism, showing the cooling module for curved parts.

[0022] In the diagram: 1. Processing frame; 2. Processing platform; 3. Welding frame; 4. Laser processing equipment; 5. Lifting mechanism; 6. Longitudinal movement mechanism; 7. Lateral movement mechanism; 8. Positioning base plate; 9. Curved surface positioning module; 901. Telescopic cylinder; 902. First controllable lifting unit; 903. Flexible connector; 904. Sealing ring; 905. Connecting air pipe; 906. Fixing ring; 907. Solenoid valve; 10. Curved surface part cooling module; 101. Second controllable lifting unit; 102. Fitting hose; 103. Pressure detection unit; 104. Connecting pipe; 105. Water pump; 106. Water tank; 107. Water supply pipe; 11. Curved surface part; 12. Trajectory recognition module; 13. Control module; 14. Inflation air pipe. Detailed Implementation

[0023] Example 1: Please refer to Figure 1 , Figure 2 and Figure 5 The present invention provides a technical solution: A laser processing apparatus and method with a curved part positioning mechanism includes a processing frame 1, a processing platform 2, a welding frame 3, and a laser processing device 4; The top of the processing frame 1 is fixedly connected to a processing platform 2 that is set flat, and a welding frame 3 is fixedly connected above the processing platform 2. A laser processing device 4 is installed at the bottom of the welding frame 3. A curved part 11 is set below the laser processing device 4. A trajectory recognition module 12 for trajectory recognition of the processing area of ​​the laser processing device 4 is installed on one side of the welding frame 3. A control module 13 is also installed on the other side of the welding frame 3. The processing frame 1 is equipped with an up-and-down lifting mechanism 5. A longitudinal moving mechanism 6 is installed above the up-and-down lifting mechanism 5. A transverse moving mechanism 7 is installed above the longitudinal moving mechanism 6. A positioning base plate 8 is installed above the transverse moving mechanism 7. A uniformly distributed curved positioning module 9 is installed above the positioning base plate 8. A curved part 11 is set above the curved positioning module 9. A curved part cooling module 10 is also installed above the positioning base plate 8. The curved part cooling module 10 includes a second controllable lifting unit 101 fixedly connected to the positioning base plate 8. The free end of the second controllable lifting unit 101 is fixedly connected to a fitting hose 102. Both ends of the fitting hose 102 are connected to a connecting pipe 104. The other end of one connecting pipe 104 is connected to a water tank 106, and the other end of the other connecting pipe 104 is connected to a water pump 105. The outside of the water pump 105 is fixedly connected to the water tank 106.

[0024] A water supply pipe 107 is connected to one side of the water tank 106, and a water replenishment device is connected to the other end of the water supply pipe 107.

[0025] Multiple pressure detection units 103 are fixedly connected to the top of the fitting hose 102, and all pressure detection units 103 are located directly above the second controllable lifting unit 101.

[0026] The fitting hose 102 is made of flexible thermally conductive silicone sheet, and the cross-section of the fitting hose 102 is rectangular.

[0027] Includes the following steps: Step 1: Place the curved part 11 above the curved positioning module 9, and use multiple curved positioning modules 9 to perform negative pressure adsorption on the curved part 11. Step 2: By activating the curved part cooling module 10, move the flexible hose 102 of the curved part cooling module 10 to make it in close contact with one side of the curved part 11: Step 3: The inner side of the curved part 11 is scanned by the trajectory recognition module 12 to plan the welding path. The control module 13 controls the up and down lifting mechanism 5, the longitudinal movement mechanism 6 and the lateral movement mechanism 7 to work together to keep the welding area focused on one place. Step 4: Activating the curved part cooling module 10 can cool one side of the curved part 11, ensuring rapid cooling and solidification of the molten metal. In the process of machining parts, planar parts are the most common. However, when machining curved parts, the following technical problems easily occur: When using a high-energy-density light beam to heat and melt the surface of a curved part, the curved part moves constantly due to the continuous machining process. The molten metal flows under the influence of gravity, and the molten metal shifts before it cools down, resulting in uneven flow. In particular, it tends to accumulate along the lower part of the curved surface and deviate from the preset forming position, which seriously affects the machining accuracy and forming quality of the curved part. A curved part cooling module 10 is installed on the upper surface of the positioning substrate 8. When the curved part 11 is surface-machined, the second controllable lifting unit 101 drives the bonding hose 102 to move upward. The bonding hose 102 is a flexible structure that can be used with the curved part 11. 1. The back is tightly fitted. During the laser welding process of the curved part 11, the heat is carried away by the cooling medium flowing inside the fitting hose 102, so as to achieve rapid cooling and shaping of the welding area, and make the molten metal liquid form along the preset trajectory, ensuring the processing accuracy and forming quality of the curved part. A pressure detection unit 103 is provided above the second controllable lifting unit 101. The pressure detection unit 103 contacts the side of the curved part 11 and collects pressure signals to ensure that the fitting hose 102 and the curved part 11 are stably fitted, and improve the heat exchange efficiency. By controlling the start and stop of the second controllable lifting unit 101 at different positions, the contact area between the fitting hose 102 and the curved part 11 can be adjusted to achieve zoned cooling for different welding conditions.

[0028] Also includes the following: The flexible tube 102 can be made of graphene flexible sheet. This material has excellent thermal conductivity and can be bent 180°. It can fit tightly with the surface of the curved part 11 for heat exchange, which helps to cool the molten metal after welding quickly and make it form quickly on the preset trajectory, avoiding problems such as metal flow and accumulation.

[0029] The flexible hose 102 has a rectangular cross-section, which can effectively increase the contact area and improve the heat exchange efficiency when it comes into contact with the surface of the curved part 11. The lifting mechanism 5, the longitudinal moving mechanism 6 and the transverse moving mechanism 7 work together to drive the upper positioning plate 8 to move, so that the area to be processed on the positioning plate 8 is accurately aligned with the laser processing equipment 4, ensuring the laser processing accuracy.

[0030] This device is mainly suitable for surface welding operations on thin-walled curved parts 11. During the welding process, the second controllable lifting unit 101 drives the contact hose 102 to fully contact the surface of the curved part 11, quickly removing heat from the welding area and achieving rapid cooling and solidification of the molten metal; the recovered heat can be used in other working conditions, improving energy utilization. A water discharge component, such as a faucet, is provided on one side of the water tank 106 to discharge and reuse the heat-exchanged water.

[0031] In other welding scenarios, if it is necessary to preheat the curved part 11, hot water can be introduced into the water tank 106, and the curved part 11 can be preheated through hot water circulation to further improve the quality of subsequent processing. It solves the problem of molten metal shifting and accumulating at the lower part of the curved surface before cooling in laser welding. It ensures processing accuracy through rapid cooling and shaping, and the device can be directly applied to welding thin-walled curved parts in the fields of 3C, automobiles, and medical devices, making it highly practical.

[0032] Example 2: This example is an improvement upon Example 1. Please refer to [link / reference]. Figure 3 and Figure 4 Specifically, multiple curved surface positioning modules 9 are arranged, and each curved surface positioning module 9 includes a telescopic cylinder 901 fixedly connected to the positioning base plate 8. The telescopic cylinder 901 is provided with a first controllable lifting unit 902 inside. The bottom of the first controllable lifting unit 902 is fixedly connected to the positioning base plate 8, and the top of the first controllable lifting unit 902 is fixedly connected to the telescopic cylinder 901. A flexible connector 903 is fixedly connected to the top of the telescopic cylinder 901, and a sealing ring 904 is fixedly connected to the top of the flexible connector 903. The first controllable lifting unit 902 is fixedly connected to a fixing ring 906 on the outside. The fixing ring 906 is fixedly connected to a connecting air pipe 905 inside. One end of the connecting air pipe 905 is connected to a flexible connector 903. The other end of the connecting air pipe 905 is connected to an inflation air pipe 14, and the other end of the inflation air pipe 14 is connected to a vacuum pump device.

[0033] Solenoid valves 907 are installed on the outside of the connecting air pipe 905. The upper part of the connecting air pipe 905 of the fixing ring 906 is set with a rigid structure, while the lower part of the connecting air pipe 905 of the fixing ring 906 is set with a flexible structure.

[0034] The sealing ring 904 is arranged in a ring shape, and the upper end face of the sealing ring 904 is inclined.

[0035] Curved parts 11 are generally fixed using clamping methods. Existing planar positioning methods cannot adapt to curved surface fixing, easily damaging thin-walled parts. Furthermore, clamping can cause deformation of thin-walled parts, leading to defocusing, decreased accuracy, and stress on the parts, especially thin metal curved parts, affecting the overall shape accuracy after laser welding. This device is equipped with multiple curved surface positioning modules 9. The telescopic cylinder 901 extends through the first controllable lifting unit 902 at corresponding positions, causing the flexible connector 903 and the upper sealing ring 904 to move upwards and fit against the curved part 11. An external vacuum pump operates, causing the flexible connector 903 and the sealing ring 904 to form a negative pressure adsorption, achieving positioning and fixing of the curved part 11. The multi-point distributed curved surface positioning modules 9 can maintain the original shape of the curved part 11, ensuring the overall quality after welding.

[0036] The sealing ring 904 is arranged at an angle on one side, which can adaptively fit the curved surface contour of the curved part 11, achieve circumferential sealing and fit, and improve the reliability of adsorption and fixation.

[0037] The connecting air tube 905 adopts a segmented structure: the upper section of the fixing ring 906 is a rigid structure, and the lower section of the fixing ring 906 is a flexible structure. This facilitates the free extension and retraction of the first controllable lifting unit 902 and avoids interference between the rigid structure and the flexible connector 903, ensuring accurate positioning and stable adsorption of the curved part 11. Also includes the following: The flexible connector 903 is made of rubber and can deform, causing the sealing ring 904 above it to rotate and fit one side of the curved part 11 to ensure vacuum adsorption and fixation. The curved positioning module 9 is selected according to the actual situation to perform targeted positioning for curved parts 11 of different shapes. The negative pressure adsorption at the corresponding position can be controlled by opening or closing the solenoid valve 907 at the corresponding position.

[0038] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A laser processing device with a curved surface part positioning mechanism, characterized in that: It includes a processing frame (1), a processing platform (2), a welding frame (3), and laser processing equipment (4); A processing platform (2) is fixedly connected to the top of the processing frame (1), and a welding frame (3) is fixedly connected above the processing platform (2). A laser processing device (4) is installed at the bottom of the welding frame (3). A curved part (11) is set below the laser processing device (4). A trajectory recognition module (12) for trajectory recognition of the processing area of ​​the laser processing device (4) is installed on one side of the welding frame (3). A control module (13) is also installed on the other side of the welding frame (3). The processing frame (1) is equipped with an up-and-down lifting mechanism (5), a longitudinal moving mechanism (6) is installed above the up-and-down lifting mechanism (5), a transverse moving mechanism (7) is installed above the longitudinal moving mechanism (6), a positioning base plate (8) is installed above the transverse moving mechanism (7), a uniformly distributed curved positioning module (9) is installed above the positioning base plate (8), a curved part (11) is provided above the curved positioning module (9), and a curved part cooling module (10) is also installed above the positioning base plate (8). The curved part cooling module (10) includes a second controllable lifting unit (101) fixedly connected to the positioning base plate (8). The free end of the second controllable lifting unit (101) is fixedly connected to a fitting hose (102). Both ends of the fitting hose (102) are connected to a connecting pipe (104). The other end of one connecting pipe (104) is connected to a water tank (106), and the other end of the other connecting pipe (104) is connected to a water pump (105). The outside of the water pump (105) is fixedly connected to the water tank (106).

2. The laser processing apparatus with a curved surface part positioning mechanism according to claim 1, characterized in that: A water supply pipe (107) is connected to one side of the water tank (106), and a water replenishment device is connected to the other end of the water supply pipe (107).

3. The laser processing apparatus with a curved surface part positioning mechanism according to claim 1, characterized in that: Multiple pressure detection units (103) are fixedly connected to the top of the fitting hose (102), and all pressure detection units (103) are located directly above the second controllable lifting unit (101).

4. The laser processing apparatus with a curved surface part positioning mechanism according to claim 1, characterized in that: The fitting hose (102) is made of flexible thermally conductive silicone sheet, and the cross-section of the fitting hose (102) is rectangular.

5. A laser processing apparatus with a curved surface part positioning mechanism according to claim 1, characterized in that: Multiple curved positioning modules (9) are arranged, and each curved positioning module (9) includes a telescopic cylinder (901) fixedly connected to the positioning base plate (8). The telescopic cylinder (901) is provided with a first controllable lifting unit (902) inside. The bottom of the first controllable lifting unit (902) is fixedly connected to the positioning base plate (8), and the top of the first controllable lifting unit (902) is fixedly connected to the telescopic cylinder (901). The top of the telescopic cylinder (901) is fixedly connected to a flexible connector (903), and the top of the flexible connector (903) is fixedly connected to a sealing ring (904). The first controllable lifting unit (902) is fixedly connected to a fixing ring (906) on the outside. The fixing ring (906) is fixedly connected to a connecting air pipe (905) inside. One end of the connecting air pipe (905) is connected to a flexible connector (903). The other end of the connecting air pipe (905) is connected to an inflation air pipe (14), and the other end of the inflation air pipe (14) is connected to a vacuum pump device.

6. A laser processing apparatus with a curved surface part positioning mechanism according to claim 5, characterized in that: Solenoid valves (907) are installed on the outside of the connecting air pipe (905). The upper part of the connecting air pipe (905) of the fixing ring (906) is set with a rigid structure, while the lower part of the connecting air pipe (905) of the fixing ring (906) is set with a flexible structure.

7. A laser processing apparatus with a curved surface part positioning mechanism according to claim 5, characterized in that: The sealing ring (904) is arranged in a ring shape, and the upper surface of the sealing ring (904) is inclined.

8. A method for a laser processing apparatus with a curved surface part positioning mechanism according to any one of claims 1-7, characterized in that: Includes the following steps: Step 1: Place the curved part (11) above the curved positioning module (9), and use multiple curved positioning modules (9) to perform negative pressure adsorption on the curved part (11); Step 2: By activating the curved part cooling module (10), move the fitting hose (102) of the curved part cooling module (10) to make it in close contact with one side of the curved part (11): Step 3: Scan the inner side of the curved part (11) through the trajectory recognition module (12) to plan the welding path. Control the up and down lifting mechanism (5), the longitudinal movement mechanism (6) and the lateral movement mechanism (7) through the control module (13) to make the welding area always focus on one place; Step 4: By starting the surface part cooling module (10), the surface part (11) can be cooled on one side to ensure that the molten metal is cooled and solidified quickly.

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