Laser cleaning machine

Abstract

The utility model provides a laser cleaning machine. The laser cleaning machine comprises a cabinet, a support, a first translation driving mechanism, a second translation driving mechanism, a lifting driving mechanism, a cantilever, a rotary driving mechanism, an optical fiber laser and a laser cleaning head. The support is arranged on the machine cabinet, and a bearing table top of the machine cabinet is used for workpieces. The first translation driving mechanism is arranged on the support, the second translation driving mechanism is connected to the first translation driving mechanism, and the lifting driving mechanism is connected to the second translation driving mechanism. The cantilever is connected to the lifting driving mechanism, the rotary driving mechanism is arranged on the cantilever, the laser cleaning head is connected to the rotary driving mechanism, and the optical fiber laser is arranged in the cabinet and connected with the laser cleaning head through an optical fiber. The first translation driving mechanism and the second translation driving mechanism are matched to drive the laser cleaning head to translate, the lifting driving mechanism is used for driving the laser cleaning head to lift, and the rotating driving mechanism is used for driving the laser cleaning head to rotate in the horizontal plane. The precision and dynamic response capability of the first translation driving mechanism and the second translation driving mechanism are not highly required, so that the equipment cost is reduced.

Description

Technical Field

[0001] This application relates to the field of laser equipment manufacturing, specifically a laser cleaning machine. Background Technology

[0002] Laser cleaning is a non-contact, safe, and environmentally friendly cleaning method. It uses a laser beam to break down contaminants, causing them to detach from the object being cleaned. It features non-contact operation, no heat effect, and applicability to various materials.

[0003] Existing laser cleaning machines generally include a machine base and a drive module mounted on the machine base. The drive module is equipped with a laser cleaning head, which performs laser cleaning on the workpiece placed on the machine base. During the cleaning process, the drive module drives the laser cleaning head to move, so that the laser beam emitted by the laser cleaning head falls on the workpiece and scans the surface of the workpiece to be cleaned, thereby performing laser cleaning on the workpiece.

[0004] In the production process, it is often necessary to clean certain annular workpieces (such as engine valve seats, annular gaskets, etc.) and annular areas on certain workpieces (such as exhaust pipe interfaces, annular areas at wafer edges, etc.). To clean these annular target areas, existing laser cleaning machines typically use X-axis and Y-axis translation drive modules working in coordination to control the laser cleaning head to follow a circular path in the horizontal plane via interpolation motion. The main problem with this approach is that it places extremely high demands on the precision and dynamic response capabilities of the X-axis and Y-axis translation drive modules, significantly increasing the equipment cost of the laser cleaning machine. Furthermore, when the laser cleaning head moves at high speeds, its acceleration and deceleration along the X and Y axes can cause circular deformation (e.g., becoming elliptical), thus limiting the movement speed of the laser cleaning head and ultimately resulting in low cleaning efficiency. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a laser cleaning machine, the detailed technical solution of which is as follows:

[0006] A laser cleaning machine includes a cabinet, a support frame, a first translation drive mechanism, a second translation drive mechanism, a lifting drive mechanism, a cantilever, a rotation drive mechanism, a fiber laser, and a laser cleaning head, wherein:

[0007] The cabinet has a support platform, and the support bracket is set on the support platform. The support platform is used to support the workpiece to be cleaned.

[0008] The fixed component of the first translation drive mechanism is mounted on the bracket, the fixed component of the second translation drive mechanism is connected to the movable component of the first translation drive mechanism, and the fixed component of the lifting drive mechanism is connected to the movable component of the second translation drive mechanism.

[0009] The first end of the cantilever is connected to the moving part of the lifting drive mechanism, the rotary drive mechanism is located at the second end of the cantilever, the laser cleaning head is connected to the moving part of the rotary drive mechanism, the fiber laser is located inside the cabinet, and the fiber laser is connected to the laser cleaning head via optical fiber.

[0010] The first translation drive mechanism is used to drive the laser cleaning head to translate in the first horizontal direction, the second translation drive mechanism is used to drive the laser cleaning head to translate in the second horizontal direction, the lifting drive mechanism is used to drive the laser cleaning head to lift, and the rotation drive mechanism is used to drive the laser cleaning head to rotate in the horizontal plane. The second horizontal direction is perpendicular to the first horizontal direction, and the laser beam of the laser cleaning head has a predetermined offset from the rotation axis of the rotation drive mechanism.

[0011] Specifically, the offset between the laser beam of the laser cleaning head and the rotation axis of the rotary drive mechanism is matched with the radius of the annular area to be cleaned on the workpiece.

[0012] The working process of the laser cleaning machine in this application is as follows:

[0013] First, the first and second translation drive mechanisms drive the laser cleaning head to translate in the first and second horizontal directions, respectively, to move the laser cleaning head to the target cleaning station directly above the workpiece. This ensures that the rotation axis of the rotary drive mechanism is aligned with the center of the annular area to be cleaned on the workpiece, and the laser beam emitted from the laser cleaning head falls onto the area to be cleaned. Subsequently, the lifting drive mechanism drives the laser cleaning head to rise and fall, adjusting the height of the laser cleaning head.

[0014] Next, the rotary drive mechanism drives the laser cleaning head to rotate in the horizontal plane, so that the laser beam repeatedly scans the annular area to be cleaned, thereby completing the laser cleaning of the area to be cleaned.

[0015] As can be seen, by setting a rotary drive mechanism and maintaining a predetermined offset between the rotation axis of the rotary drive mechanism and the laser beam of the laser cleaning head, the first and second translation drive mechanisms only need to translate the laser cleaning head to the target cleaning position directly above the workpiece. During the actual cleaning process, the laser cleaning head is simply driven to rotate in the horizontal plane by the rotary drive mechanism to complete the cleaning of the annular target area. Compared to existing laser cleaning machines, the laser cleaning machine of this application does not have high requirements for the precision and dynamic response capabilities of the first and second translation drive mechanisms, thereby reducing equipment costs. Furthermore, the rotary drive mechanism can drive the laser cleaning head to rotate rapidly in the horizontal plane, thereby improving cleaning efficiency without causing deformation of the cleaning trajectory.

[0016] In some embodiments, the rotary drive mechanism includes a rotary drive component, a connecting flange, a connecting rod, and a mounting base, wherein: the connecting flange is rotatably mounted horizontally at the second end of the cantilever and is connected to the rotary drive component mounted on the cantilever; the rotary drive component is used to drive the connecting flange to rotate in the horizontal plane; the connecting rod extends vertically, with a flange seat fixedly connected to the connecting flange at the upper end and a mounting base at the lower end; the laser cleaning head is connected to the mounting base.

[0017] By configuring the rotary drive mechanism, the connection strength between the laser cleaning head and the rotary drive mechanism is ensured. Furthermore, the laser cleaning head is suspended below the cantilever via a connecting rod, reducing the impact of vibrations generated during rotation on the beam quality, thereby improving the cleaning effect.

[0018] In some embodiments, the connecting flange is connected to the second end of the cantilever via a rolling bearing; the rotary drive includes a motor, a spur gear, and a gear ring, wherein the spur gear is fixedly mounted on the drive shaft of the motor, and the gear ring is sleeved on the outer circumference of the connecting flange, and the gear ring meshes with the spur gear; or, the rotary drive includes a motor, a synchronous pulley, and a synchronous belt, wherein the synchronous pulley is fixedly mounted on the drive shaft of the motor, a synchronous belt groove is provided on the outer circumference of the connecting flange, and the synchronous belt is sleeved on the synchronous pulley and the connecting flange.

[0019] Two simple and stable rotary drive components are provided, both of which can provide stable rotary drive for the laser cleaning head.

[0020] In some embodiments, the mounting base is provided with a waist-shaped hole extending in a horizontal direction, the waist-shaped hole extending radially from a first position near the connecting rod toward a second position away from the connecting rod; the laser cleaning head is provided with a screw hole that mates with the waist-shaped hole, and the laser cleaning head is mounted on the mounting base in an adjustable manner via a bolt that passes through the screw hole and the waist-shaped hole.

[0021] Before performing laser cleaning on the workpiece, the mounting position of the laser cleaning head on the mounting base can be adjusted to ensure that the offset between the rotation axis of the rotary drive mechanism and the laser beam of the laser cleaning head matches the radius of the annular area to be cleaned on the workpiece, thereby improving the cleaning compatibility of this application. Specifically, first loosen the bolts passing through the threaded hole and the oblong hole, then push the laser cleaning head along the oblong hole. After it is in place, tighten the bolts again.

[0022] In some embodiments, the laser cleaning machine includes two first translation drive mechanisms, which are arranged side by side and spaced apart on a support along a second horizontal direction; the two ends of the fixed part of the second translation drive mechanism are respectively connected to the movable part of one of the first translation drive mechanisms, and the two first translation drive mechanisms are configured to synchronously drive the second translation drive mechanism to translate along the first horizontal direction.

[0023] By using two first translation drive mechanisms to drive the second translation drive mechanism and its lifting drive mechanism, the laser cleaning head is translated along the first horizontal direction, which improves the overall structural stability of the laser cleaning machine of this application and further enhances the cleaning effect of the laser cleaning head.

[0024] In some embodiments, the laser cleaning head includes a connecting block, an optical fiber connector, a galvanometer, and a field lens. The connecting block is connected to a movable part of the rotary drive mechanism, the optical fiber connector is connected to the top of the connecting block, the galvanometer is connected to the side wall of the connecting block, and the field lens is connected to the bottom of the galvanometer. An optical path connecting the optical fiber connector and the galvanometer is provided inside the connecting block. The optical fiber connector is connected to a fiber laser via an optical fiber. The laser emitted by the fiber laser is transmitted through the optical fiber to the optical path and then enters the galvanometer. The galvanometer is used to deflect and adjust the laser, and the field lens is used to focus the deflected and adjusted laser onto the workpiece.

[0025] The connecting block allows for a stable connection with the moving parts of the rotary drive mechanism, thereby reducing the impact of vibration on the optical path. By dynamically adjusting the laser beam using a galvanometer, the laser beam can scan the annular area to be cleaned, ensuring comprehensive cleaning of the area.

[0026] In some embodiments, the laser cleaning machine further includes a mounting bracket connected to the connecting block at its upper end, the mounting bracket extending downward to below the field lens; the mounting bracket is provided with at least one air blowing plate that communicates with an external compressed air source and extends horizontally, the air blowing plate being used to blow air horizontally to form an air curtain between the field lens and the support platform of the cabinet.

[0027] During laser cleaning, a large amount of dust is generated. When the dust rises, it contaminates the field lens, reducing its light transmittance. By installing an air blowing plate that is connected to an external compressed air source and extends horizontally, an air curtain is formed between the field lens and the support platform of the cabinet, thereby preventing dust from rising and contaminating the field lens.

[0028] In some embodiments, the blowing plate is provided with an air cavity, and a plurality of blowing holes communicating with the air cavity are provided at horizontal intervals on the side wall of the blowing plate facing the field mirror. The blowing plate is also provided with a connector communicating with the air cavity and communicating with a compressed air source through an air pipe.

[0029] By adjusting the air blowing plate, a horizontal air curtain is ensured to be formed between the field lens and the support surface of the cabinet.

[0030] In some embodiments, a water-cooled flow channel surrounding the optical path is provided within the connecting block, and the water-cooled flow channel is connected to an external water-cooling mechanism via a pipe.

[0031] The water-cooling mechanism is connected to the water-cooling flow channel via pipes, thus forming a water-cooling circulation loop. When the cooling water flows in the water-cooling flow channel, it cools the connecting block, which in turn cools the galvanometer and field lens, preventing them from being damaged by excessive temperature. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the laser cleaning machine in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the cantilever and rotary drive mechanism in the embodiments of this application;

[0034] Figure 3 This is a schematic diagram of the connecting rod and mounting base in an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the structure of the laser cleaning head in the embodiments of this application.

[0036] Figures 1 to 4 Includes:

[0037] Rack 1;

[0038] Support 2;

[0039] First translation drive mechanism 3;

[0040] Second translation drive mechanism 4;

[0041] Lifting drive mechanism 5;

[0042] Cantilever 6;

[0043] Rotary drive mechanism 7: rotary drive component 71, connecting flange 72, connecting rod 73, mounting base 74, flange seat 75, and oblong hole 76;

[0044] Laser cleaning head 8: connecting block 81, fiber optic connector 82, galvanometer 83, field lens 84;

[0045] Mounting bracket 9;

[0046] Air blowing plate 10. Detailed Implementation

[0047] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0048] As described in the background section, existing laser cleaning machines typically employ an X-axis translation drive module and a Y-axis translation drive module working together in coordination to control the laser cleaning head to move along a circular path in the horizontal plane via interpolation motion. The main problem with this approach is the extremely high requirements for the precision and dynamic response capabilities of the X-axis and Y-axis translation drive modules, which significantly increases the equipment cost of the laser cleaning machine. Furthermore, when the laser cleaning head moves at high speeds, its acceleration and deceleration along the X and Y axes can easily cause circular deformation (e.g., turning it into an ellipse), thus limiting the movement speed of the laser cleaning head and ultimately resulting in low cleaning efficiency.

[0049] Therefore, this application provides a laser cleaning machine that can drive a laser cleaning head to rotate in a horizontal plane, thereby achieving laser cleaning of a ring-shaped area to be cleaned. Figures 1 to 4 As shown, the laser cleaning machine in this application includes a cabinet 1, a bracket 2, a first translation drive mechanism 3, a second translation drive mechanism 4, a lifting drive mechanism 5, a cantilever 6, a rotation drive mechanism 7, a fiber laser, and a laser cleaning head 8.

[0050] The cabinet 1 has a support platform, and the bracket 2 is set on the support platform. The support platform is used to support the workpiece to be cleaned.

[0051] The fixed part of the first translation drive mechanism 3 is mounted on the bracket 2, the fixed part of the second translation drive mechanism 4 is connected to the movable part of the first translation drive mechanism 3, and the fixed part of the lifting drive mechanism 5 is connected to the movable part of the second translation drive mechanism 4.

[0052] The first end of the cantilever 6 is connected to the movable part of the lifting drive mechanism 5, the rotary drive mechanism 7 is located at the second end of the cantilever 6, the laser cleaning head 8 is connected to the movable part of the rotary drive mechanism 7, and the fiber laser is located inside the cabinet 1. The fiber laser is connected to the laser cleaning head 8 via an optical fiber.

[0053] The first translation drive mechanism 3 is used to drive the laser cleaning head 8 to translate in the first horizontal direction (the Y-axis direction in the figure), the second translation drive mechanism 4 is used to drive the laser cleaning head 8 to translate in the second horizontal direction (the X-axis direction in the figure), the lifting drive mechanism 5 is used to drive the laser cleaning head 8 to lift, and the rotation drive mechanism 7 is used to drive the laser cleaning head 8 to rotate in the horizontal plane. The second horizontal direction is perpendicular to the first horizontal direction, and the laser beam of the laser cleaning head 8 has a predetermined offset from the rotation axis of the rotation drive mechanism 7.

[0054] The working process of the laser cleaning machine in this application is as follows:

[0055] Before cleaning, the offset between the laser beam of the laser cleaning head 8 and the rotation axis of the rotary drive mechanism 7 is adjusted according to the radius of the annular area to be cleaned on the workpiece, to ensure that the offset matches the radius of the area to be cleaned.

[0056] First, the first translation drive mechanism 3 and the second translation drive mechanism 4 drive the laser cleaning head 8 to translate in the first horizontal direction and the second horizontal direction, respectively, to move the laser cleaning head 8 to the target cleaning position directly above the workpiece. This aligns the rotation axis of the rotary drive mechanism 7 with the center of the annular area to be cleaned on the workpiece, and the laser beam emitted from the laser cleaning head falls into the area to be cleaned. Subsequently, the lifting drive mechanism 5 drives the laser cleaning head 8 to rise and fall, adjusting the height of the laser cleaning head 8.

[0057] Next, the rotary drive mechanism 7 drives the laser cleaning head 8 to rotate in the horizontal plane, so that the laser beam repeatedly scans the annular area to be cleaned, thereby completing the laser cleaning of the area to be cleaned.

[0058] As can be seen, by setting up the rotary drive mechanism 7 and maintaining a predetermined offset between the rotation axis of the rotary drive mechanism 7 and the laser beam of the laser cleaning head, the first translation drive mechanism 3 and the second translation drive mechanism 4 only need to translate the laser cleaning head 8 to the target cleaning position directly above the workpiece. In the actual cleaning process, the cleaning of the annular area to be cleaned can be completed simply by driving the laser cleaning head 8 to rotate in the horizontal plane through the rotary drive mechanism 7.

[0059] Compared to existing laser cleaning machines, the laser cleaning machine of this application does not have high requirements for the precision and dynamic response capability of the first translation drive mechanism 3 and the second translation drive mechanism 4, thereby reducing equipment costs. In addition, the rotation drive mechanism 7 can drive the laser cleaning head 8 to rotate rapidly in the horizontal plane, thereby improving cleaning efficiency and avoiding the problem of cleaning trajectory deformation during the process.

[0060] To ensure that the first translation drive mechanism 3 and the second translation drive mechanism 4 can accurately drive the laser cleaning head 8 to the target cleaning station, that is, to ensure that the rotation axis of the rotary drive mechanism 7 is aligned with the center of the annular area to be cleaned on the workpiece, an alternative approach can be taken. First, a workpiece coordinate system can be established. Then, the center coordinates of the area to be cleaned can be measured using a vision system. Subsequently, based on these coordinates, the laser cleaning head 8 can be moved to the target cleaning station. Alternatively, an auxiliary positioning laser can be installed on the rotary drive mechanism 7. During the movement, the trajectory of the laser spot projected onto the workpiece by the auxiliary positioning laser can be observed. When the laser spot reaches the center of the area to be cleaned, it indicates that the laser cleaning head 8 is properly adjusted.

[0061] The first translation drive mechanism 3, the second translation drive mechanism 4, and the lifting drive mechanism 5 can all adopt various existing linear drive modules, such as a linear drive module consisting of a motor, a lead screw, and a lead screw nut. The motor constitutes the fixed component of the linear drive module, while the lead screw nut constitutes the moving component of the linear drive module. When the motor drives the lead screw to rotate, it causes the lead screw nut to slide along the lead screw.

[0062] like Figures 2 to 3 As shown, optionally, the rotary drive mechanism 7 includes a rotary drive component 71, a connecting flange 72, a connecting rod 73, and a mounting base 74. The connecting flange 72 is horizontally rotatable at the second end of the cantilever 6 and is connected to the rotary drive component 71 mounted on the cantilever 6. The rotary drive component 71 drives the connecting flange 72 to rotate in the horizontal plane. The connecting rod 73 extends vertically, with a flange seat 75 fixedly connected to the connecting flange 72 at its upper end and a mounting base 74 at its lower end. The laser cleaning head 8 is connected to the mounting base 74; that is, the mounting base 74 constitutes a movable component of the rotary drive mechanism 7.

[0063] The laser cleaning head 8 is connected to the mounting base 74, ensuring the connection strength between the laser cleaning head 8 and the rotary drive mechanism 7. Furthermore, the laser cleaning head 8 is suspended below the cantilever 6 via the connecting rod 73, which reduces the impact of vibrations generated during rotation on the beam quality, thereby improving the cleaning effect.

[0064] To ensure the stability of the connection between the connecting flange 72 and the cantilever 6, and to ensure that the connecting flange 72 can rotate smoothly relative to the cantilever 6, the connecting flange 72 may optionally be connected to the second end of the cantilever 6 via a rolling bearing.

[0065] In one optional embodiment, the rotary drive 71 includes a motor, a spur gear, and a gear ring. The spur gear is fixedly mounted on the drive shaft of the motor, and the gear ring is fitted onto the outer circumference of the connecting flange 72, meshing with the spur gear. When the motor drives the spur gear to rotate, the spur gear drives the connecting flange 72 to rotate via the gear ring, ultimately driving the connecting rod 73 and the laser cleaning head 8 to rotate.

[0066] In another optional embodiment, the rotary drive 71 includes a motor, a synchronous pulley, and a synchronous belt. The synchronous pulley is fixedly mounted on the drive shaft of the motor. A synchronous belt groove is provided on the outer circumference of the connecting flange 72, and the synchronous belt is sleeved on the synchronous pulley and the connecting flange 72. When the motor drives the synchronous pulley to rotate, the synchronous pulley drives the connecting flange 72 to rotate via the synchronous belt, ultimately driving the connecting rod 73 and the laser cleaning head 8 to rotate.

[0067] Both types of rotary drive components 71 described above can provide stable rotary drive for the laser cleaning head. Of course, in other embodiments, the rotary drive component 71 can also adopt other existing rotary drive mechanisms, as long as they can drive the connecting flange 72 to rotate.

[0068] like Figure 3 As shown, optionally, the mounting base 74 is provided with a horizontally extending oblong hole 76, which extends radially from a first position near the connecting rod 73 toward a second position away from the connecting rod 73. The laser cleaning head 8 is provided with a threaded hole that mates with the oblong hole 76, and the laser cleaning head 8 is mounted on the mounting base 74 in an adjustable position via a bolt passing through the threaded hole and the oblong hole 76.

[0069] Before performing laser cleaning on the workpiece, the mounting position of the laser cleaning head 8 on the mounting base 74 can be adjusted to ensure that the offset between the rotation axis of the rotary drive mechanism 7 and the laser beam of the laser cleaning head 8 matches the radius of the annular area to be cleaned on the workpiece, thus improving the cleaning compatibility of this application. Specifically, first loosen the bolts passing through the threaded hole and the oblong hole 76, then push the laser cleaning head 8 along the oblong hole 76. After it is in place, tighten the bolts again.

[0070] like Figure 1 As shown, optionally, the laser cleaning machine in this embodiment includes two first translation drive mechanisms 3, which are arranged side by side and spaced apart on the bracket 2 along the second horizontal direction.

[0071] The two ends of the fixed part of the second translation drive mechanism 4 are respectively connected to the movable part of one of the first translation drive mechanisms 3, and the two first translation drive mechanisms 3 are configured to synchronously drive the second translation drive mechanism 4 to translate along the first horizontal direction.

[0072] By cooperating with two first translation drive mechanisms 3 to drive the second translation drive mechanism 4 and its lifting drive mechanism 5, the laser cleaning head 8 is translated along the first horizontal direction, which improves the overall structural stability of the laser cleaning machine of this application and further enhances the cleaning effect of the laser cleaning head 8.

[0073] like Figure 4 As shown, optionally, the laser cleaning head 8 includes a connecting block 81, an optical fiber connector 82, a galvanometer 83, and a field lens 84. The connecting block 81 is connected to the movable part of the rotary drive mechanism 7, the optical fiber connector 82 is connected to the top of the connecting block 81, the galvanometer 83 is connected to the side wall of the connecting block 81, and the field lens 84 is connected to the bottom of the galvanometer 83. An optical path connecting the optical fiber connector 82 and the galvanometer 83 is provided inside the connecting block 81.

[0074] The fiber optic connector 82 is connected to the fiber laser via an optical fiber. The laser emitted by the fiber laser is transmitted through the optical fiber to the optical path and then enters the galvanometer 83. The galvanometer 83 is used to deflect and adjust the laser. The field lens 84 is used to focus the laser that has been deflected and adjusted onto the workpiece.

[0075] The connecting block 81 provides a stable connection to the moving parts of the rotary drive mechanism 7, thereby reducing the impact of vibration on the optical path. The laser beam is dynamically adjusted by the galvanometer 83, enabling precise scanning of the annular area to be cleaned, ensuring comprehensive cleaning of the area.

[0076] Of course, in order to ensure that the laser can accurately enter the galvanometer 83 through the optical path, optical path components such as reflectors and convex mirrors can be set in the optical path.

[0077] During laser cleaning, a large amount of dust is generated. As the dust rises, it contaminates field lens 84, reducing its light transmittance. To solve this problem, such as... Figure 4 As shown, optionally, the laser cleaning machine in this embodiment further includes a mounting bracket 9 connected to the connecting block 81 at its upper end, and the mounting bracket 9 extends downward to below the field lens 84. The mounting bracket 9 is provided with at least one air blowing plate 10 that communicates with an external compressed air source and extends horizontally. The air blowing plate 10 is used to blow air in the horizontal direction to form an air curtain between the field lens 84 and the support platform of the cabinet 1.

[0078] Air curtains can prevent dust from rising and contaminating the field lens during the laser cleaning process.

[0079] Optionally, the blowing plate 10 is provided with an air cavity, and a number of blowing holes communicating with the air cavity are arranged at intervals along the horizontal direction on the side wall of the blowing plate 10 facing the field mirror 84. The blowing plate 10 is also provided with a connector communicating with the air cavity and communicating with a compressed air source through an air pipe.

[0080] Optionally, the connecting block 81 is provided with a water-cooled flow channel surrounding the optical path. The water-cooled flow channel is connected to an external water-cooling mechanism via a pipe, thereby forming a water-cooled circulation loop. When the cooling water flows in the water-cooled flow channel, it cools the connecting block 81, which in turn cools the galvanometer 83 and the field lens 84, preventing them from being damaged by excessive temperature.

[0081] This application provides a sufficiently detailed and specific description. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within its protection scope. The scope of protection claimed in this application is defined by the claims, not by the above descriptions in the embodiments. Without contradiction, some optional components in one embodiment can also be configured in another embodiment, and some preferred structures of the same component in one embodiment can also be configured in another embodiment. Furthermore, there may be slight differences in the wording of the names of certain components in different embodiments; these slight differences will not affect the understanding of the technical solution of the present invention by those skilled in the art.

Claims

1. A laser cleaning machine, characterized in that, The laser cleaning machine includes a cabinet, a support frame, a first translation drive mechanism, a second translation drive mechanism, a lifting drive mechanism, a cantilever, a rotation drive mechanism, a fiber laser, and a laser cleaning head, wherein: The cabinet has a support platform, and the bracket is mounted on the support platform. The support platform is used to support the workpiece to be cleaned. The fixed component of the first translation drive mechanism is mounted on the bracket, the fixed component of the second translation drive mechanism is connected to the movable component of the first translation drive mechanism, and the fixed component of the lifting drive mechanism is connected to the movable component of the second translation drive mechanism. The first end of the cantilever is connected to the movable part of the lifting drive mechanism, the rotary drive mechanism is located at the second end of the cantilever, the laser cleaning head is connected to the movable part of the rotary drive mechanism, the fiber laser is located inside the cabinet, and the fiber laser is connected to the laser cleaning head via an optical fiber. The first translation drive mechanism is used to drive the laser cleaning head to translate in a first horizontal direction, the second translation drive mechanism is used to drive the laser cleaning head to translate in a second horizontal direction, the lifting drive mechanism is used to drive the laser cleaning head to lift, and the rotation drive mechanism is used to drive the laser cleaning head to rotate in a horizontal plane, wherein the second horizontal direction is perpendicular to the first horizontal direction, and the laser beam of the laser cleaning head has a predetermined offset from the rotation axis of the rotation drive mechanism.

2. The laser cleaning machine as described in claim 1, characterized in that, The rotary drive mechanism includes a rotary drive component, a connecting flange, a connecting rod, and a mounting base, wherein: The connecting flange is rotatably mounted horizontally at the second end of the cantilever and is connected to the rotary drive unit disposed on the cantilever. The rotary drive unit is used to drive the connecting flange to rotate in the horizontal plane. The connecting rod extends vertically, and the upper end of the connecting rod is provided with a flange seat that is fixedly connected to the connecting flange, and the lower end is provided with the mounting seat; The laser cleaning head is connected to the mounting base.

3. The laser cleaning machine as described in claim 2, characterized in that, The connecting flange is connected to the second end of the cantilever via a rolling bearing; The rotary drive component includes a motor, a spur gear, and a gear ring. The spur gear is fixedly mounted on the drive shaft of the motor, and the gear ring is sleeved on the outer circumference of the connecting flange, meshing with the spur gear. Alternatively, the rotary drive component includes a motor, a synchronous pulley, and a synchronous belt. The synchronous pulley is fixedly mounted on the drive shaft of the motor, and a synchronous belt groove is provided on the outer circumference of the connecting flange. The synchronous belt is sleeved on the synchronous pulley and the connecting flange.

4. The laser cleaning machine as described in claim 2, characterized in that, The mounting base is provided with a waist-shaped hole extending in the horizontal direction, and the waist-shaped hole extends radially from a first position near the connecting rod toward a second position away from the connecting rod; The laser cleaning head is provided with a screw hole that mates with the waist-shaped hole, and the laser cleaning head is mounted on the mounting base in an adjustable position via a bolt that passes through the screw hole and the waist-shaped hole.

5. The laser cleaning machine as described in claim 1, characterized in that, The laser cleaning machine includes two first translation drive mechanisms, which are arranged side by side and spaced apart on the bracket along the second horizontal direction. The two ends of the fixed component of the second translation drive mechanism are respectively connected to the movable component of one of the first translation drive mechanisms, and the two first translation drive mechanisms are configured to synchronously drive the second translation drive mechanism to translate along the first horizontal direction.

6. The laser cleaning machine as described in claim 1, characterized in that, The laser cleaning head includes a connecting block, an optical fiber connector, a galvanometer, and a field lens. The connecting block is connected to the movable part of the rotary drive mechanism, the optical fiber connector is connected to the top of the connecting block, the galvanometer is connected to the side wall of the connecting block, and the field lens is connected to the bottom of the galvanometer. An optical path connecting the optical fiber connector and the galvanometer is provided inside the connecting block. The fiber optic connector is connected to the fiber laser via an optical fiber. The laser emitted by the fiber laser is transmitted through the optical fiber to the optical path and then enters the galvanometer. The galvanometer is used to deflect and adjust the laser beam. The field lens is used to focus the laser beam, after deflection and adjustment, onto the workpiece.

7. The laser cleaning machine as described in claim 6, characterized in that, The laser cleaning machine also includes a mounting bracket connected at the top to the connecting block, the mounting bracket extending downward to below the field lens; The mounting bracket is provided with at least one air blowing plate that is connected to an external compressed air source and extends horizontally. The air blowing plate is used to blow air horizontally to form an air curtain between the field lens and the support platform of the cabinet.

8. The laser cleaning machine as described in claim 7, characterized in that, The blowing plate has an air cavity inside, and a number of blowing holes communicating with the air cavity are arranged horizontally at intervals on the side wall of the blowing plate facing the field lens. The blowing plate is also provided with a connector communicating with the air cavity and communicating with the compressed air source through an air pipe.

9. The laser cleaning machine as described in claim 6, characterized in that, The connecting block is provided with a water-cooled flow channel surrounding the optical path, and the water-cooled flow channel is connected to an external water-cooling mechanism via a pipe.

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