Diamond grinding tool femtosecond laser trimming device and trimming method thereof

Abstract

The invention discloses a diamond grinding tool femtosecond laser trimming device and a trimming method thereof.The diamond grinding tool femtosecond laser trimming device comprises a sealing box, an adjusting ring is rotationally clamped on the sealing box and controlled through an electric motor, a plurality of pairs of air holes are formed in the adjusting ring, each pair of air holes comprises an air inlet and an air outlet, and the air inlet is communicated with the air outlet; a hose is arranged in each air hole in a penetrating mode, all the hoses are controlled through a comprehensive discharging and sucking controller, the comprehensive discharging and sucking controller is connected to a computer display and control system, and a trimming assembly is arranged in the sealing box. According to the device, the air blowing pipe and the air suction pipe are arranged to pass through air holes in the side of the transparent sealing box and are aligned with the femtosecond laser spot position to blow out inert gas, and therefore the influence that gas microparticles formed in the finishing process return to cover the diamond curved surface is avoided; therefore, pits and convex points caused by non-uniform energy absorption in the finishing process are avoided, and the finishing efficiency and the surface quality of the diamond grinding tool are improved.

Description

Technical Field

[0001] This invention relates to the field of mold dressing technology, and more specifically, to a femtosecond laser dressing device and method for diamond grinding wheels. Background Technology

[0002] Diamond grinding wheels offer excellent grinding performance, but their high strength and hardness make them extremely difficult to repair after prolonged grinding damage, limiting their widespread application in actual production. Existing technologies such as mechanical methods, electrical discharge machining (EDM), and ion beam processing are ineffective at dressing diamond grinding wheels, severely hindering the full realization of their superior grinding performance and becoming a weak link in the development of high-end CNC grinding machines in my country. Compared to long-pulse lasers, femtosecond lasers offer advantages such as extremely precise processing areas, ultra-short pulses, and high peak power, making them more suitable for the fine-tuning of diamond grinding wheels.

[0003] Researchers have employed air-blowing or liquid-phase-assisted laser dressing of bronze diamond grinding wheels. Air-blowing alters the particles ejected during laser dressing, increasing the height of the diamond abrasive grains above the bond and enhancing the chip space around the grains. Liquid-phase assistance achieves rapid cooling during laser dressing, reducing energy accumulation and preventing thermal loss.

[0004] While the aforementioned dressing process has achieved certain dressing effects, it cannot be efficient and simultaneously avoid plasma energy absorption, particle return, and diamond heat loss during the dressing process. Furthermore, due to the high energy and accumulated heat generated during femtosecond laser dressing, and the subsequent offline inspection, defects such as pits, bumps, and dulling of the grinding edge often appear on the diamond surface, greatly reducing the dressing quality and efficiency. There is still a significant gap between this and practical applications, and there is an urgent need to further develop efficient, high-quality, and high-precision dressing methods and devices. Summary of the Invention

[0005] This invention provides a femtosecond laser dressing device and method for diamond grinding wheels, which solves the problems of existing femtosecond laser dressing devices, which have high energy and tend to accumulate heat after pulse count during the dressing process. Furthermore, offline detection is often used after dressing, which often results in defects such as pits, bumps, and dulling of the grinding edge on the diamond surface, greatly reducing the dressing quality and efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A femtosecond laser dressing device for diamond grinding wheels includes a sealed box. An adjusting ring is rotatably mounted on the sealed box. The adjusting ring is controlled by an electric motor. The adjusting ring has multiple pairs of air holes, each pair of air holes including an air inlet and an air outlet. A flexible tube is inserted into each air hole. All the flexible tubes are controlled by an integrated suction and exhaust controller, which is connected to a computer display and control system. Dressing components are installed inside the sealed box.

[0008] Preferably, the trimming assembly includes a tool disk connected to the top of the sealed box via a motor rotation. Three scanning heads are slidably mounted on the tool disk. The three scanning heads are a mesh division and positioning scanning head, a 3D measurement and analysis scanning head, and a femtosecond laser head. The 3D measurement and analysis scanning head uploads data information to a 3D measurement and processing analysis platform, and the mesh division and positioning scanning head uploads data information to a mesh division and positioning analysis platform. All three scanning heads are controlled by a computer display and control system.

[0009] Preferably, the femtosecond laser head is connected to a five-axis galvanometer and a femtosecond laser control switch.

[0010] Preferably, the outer side of the sealed box is provided with a pair of doors, each of which is provided with a positioning block that is slidably engaged by a dovetail groove, and the bottom end of the positioning block is provided with a pair of insert rods. The other door is fixedly provided with a positioning seat, and both insert rods are slidably engaged in the positioning seat.

[0011] Preferably, a clamping assembly connected to a two-dimensional precision moving platform is provided on the bottom wall of the sealed box. The clamping assembly includes a clamping seat fixedly connected to the two-dimensional precision moving platform. A fixed rod passes through the clamping seat. A shaped block, a connecting ring, and a collar pass through the fixed rod in sequence. The bottom end of the collar contacts the top wall of the two-dimensional precision moving platform. A lever is connected to the outside of the collar. A moving seat located outside the lever is rotatably locked onto the outer wall of the sealed box. Three grippers are provided on the outside of the clamping seat and hinged by a fixing button. The grippers are connected to the clamping seat by a spring. The inner side of the bottom end of the grippers contacts a push rod. The push rod is slidably locked onto the side wall of the clamping seat. One end of the push rod contacts the arc surface of the side wall of the shaped block.

[0012] A method for dressing diamond grinding wheels using a femtosecond laser dressing device includes the following steps:

[0013] S1: Fix the diamond grinding wheel to be dressed onto the clamping assembly and determine the initial coordinates of the two-dimensional precision moving platform.

[0014] S2: Switch the tool disk to the 3D scanning head position. The computer display and control system controls the 3D scanning head to perform 3D scanning, and sets the trimming layer number, trimming height value, and trimming reference plane based on the scanning data.

[0015] S3: After the 3D scanning head completes the scan, the tool disk switches to the mesh positioning scanning head, and the computer display and control system controls the mesh division and positioning platform system to scan the trimmed diamond surface. Based on the scanned surface data, the size, range, number and shape of the surface mesh are set, and the center coordinate values ​​of the mesh are marked.

[0016] S4: Provides the data from the 3D measurement and processing analysis platform and the mesh generation and positioning platform system to the computer display and control system to control the process parameters of the femtosecond laser, the angle of the five-axis galvanometer, and the position parameters of the 2D moving platform.

[0017] S5: Open the air blowing port and air suction port on the side of the sealed box, and control the air blowing and air suction pressure of the air blowing hose and the air suction hose respectively. Adjust the air blowing and air suction angles with the adjustment ring to align with the position of the femtosecond laser trimming spot.

[0018] S6: After each layer is trimmed by femtosecond laser, a 3D scanning head and a grid positioning scanning head will be scanned online for detection. Based on the scan data, the number of trimmed layers, the height value and the grid data can be reset, and then the femtosecond laser trimming will be performed again.

[0019] S7: Repeat S2-S6 until the surface accuracy and quality of the diamond grinding wheel meet the dressing requirements.

[0020] The principle and beneficial effects of this technical solution:

[0021] (1) Using an auxiliary femtosecond laser with a blow-suction tube, three-dimensional layering, and grid positioning to dress diamond grinding tools can improve the efficiency of the dressing process, avoid pits, bumps, and depressions that appear on the diamond surface, and suppress thermal cracks and graphitization damage during the dressing process, thereby improving the dressing quality of diamond grinding tools.

[0022] (2) The blowing pipe and the suction pipe are respectively through the blowing and suction holes on the side of the transparent sealed box. They are both aligned with the position of the femtosecond laser spot. The inert gas blown out can accelerate the flow rate of the gas during the dressing process and increase the efficiency of the suction pipe. This avoids the influence of gas microparticles formed during the dressing process returning to cover the diamond surface, thus avoiding pits and bumps caused by uneven energy absorption during the dressing process, and improving the efficiency and surface quality of dressing diamond grinding tools.

[0023] (3) The grid-based positioning scanning head can accurately scan the topography of the diamond surface. The obtained data is stored in the grid-based positioning analysis platform. The platform will combine the scanning data of the three-dimensional scanning head, analyze it together, divide the surface into grids and provide coordinate positions. This can provide accurate positions for subsequent femtosecond laser trimming of the surface, thereby improving the efficiency and accuracy of trimming the diamond surface.

[0024] (4) The femtosecond laser is equipped with a five-axis galvanometer that can automatically and dynamically adjust the position and attitude of the laser beam to keep the laser focused on the actual curved surface and incident normally; the computer control system controls the two-dimensional platform, which can automatically move to the laser spot in the trimming plane, and after obtaining the trimming height through the three-dimensional measurement and processing analysis platform, it is fed back to the five-axis galvanometer to ensure that the femtosecond laser is processed at the focal length position, which can improve the efficiency and quality of trimming diamond grinding tools.

[0025] (5) The three-dimensional scanning head can obtain the original data of the diamond topography and store it in the grid division and positioning analysis platform. The analysis platform can set the number of trimming layers and trimming height value for the trimmed diamond. Based on the trimming height value, the laser process parameters can be automatically calculated, thereby avoiding heat accumulation and heat loss of the diamond during the trimming process and improving the quality of the diamond grinding wheel during the trimming process.

[0026] (6) The mesh generation and positioning analysis platform can automatically adjust the number of meshes for trimming diamond surfaces based on the size of the femtosecond laser spot and the condition that the area of ​​the mesh is slightly larger than the area of ​​the spot. During the trimming process, the coordinates of the trimmed surface can be automatically assigned to the femtosecond laser controller and the five-axis galvanometer. It is not necessary to return to the origin to reassign and reset after each trimming, thereby ensuring continuous and uninterrupted trimming and improving trimming efficiency.

[0027] (7) The entire process of femtosecond laser trimming is completed in a retractable sealed box, which will not affect the surrounding environment. The side of the sealed box has an air inlet and an air outlet. Each hole can be opened and closed according to the trimming requirements to control the blowing angle, which improves the blowing efficiency, avoids the return effect of splashed particles, suppresses the concave points, convex points and pits of the diamond surface trimmed by femtosecond laser, and improves the quality of the trimmed surface.

[0028] (8) The tool disk can rotate counterclockwise or clockwise. The femtosecond laser head, three-dimensional scanning head and network positioning scanning head are fixed below the tool disk. In actual use, the functions of processing, scanning detection and network positioning can be directly switched as needed. It can also be detected and switched online in real time as needed, which can improve the efficiency and quality of femtosecond laser trimming. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0031] Figure 3 yes Figure 2 Enlarged structural diagram of region A in the middle;

[0032] Figure 4 yes Figure 2 A magnified structural diagram of region B in the middle;

[0033] Figure 5 This is a schematic diagram of an existing laser dressing wheel;

[0034] Figure 6 This is a flowchart of existing laser dressing technology for grinding wheels;

[0035] Figure 7 This is an observation image of the surface effect of the diamond abrasive after the present invention.

[0036] The reference numerals in the accompanying drawings of the instruction manual include: 1. Sealed box; 2. Adjusting ring; 3. Box door; 4. Positioning seat; 5. Air vent; 6. Moving seat; 7. Lever; 8. Motor; 9. Tool tray; 10. Dovetail groove; 11. Positioning block; 12. Insert rod; 13. Spring; 14. Gripper; 15. Fixing button; 16. Push rod; 17. Connecting ring; 18. Clamping seat; 19. Fixing rod; 20. Irregular block; 21. Curved surface; 22. Collar; 23. Scanning head. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0038] Example:

[0039] like Figures 1 to 4 As shown, the present invention provides a femtosecond laser dressing device for diamond grinding tools, including a sealed box 1. An adjusting ring 2 is rotatably mounted on the sealed box 1. The adjusting ring 2 is controlled by an electric motor. Multiple pairs of air holes 5 are opened on the adjusting ring 2. Each pair of air holes 5 includes an air inlet and an air outlet. A flexible tube is inserted into each air hole 5. All flexible tubes are controlled by an integrated suction and exhaust controller. The integrated suction and exhaust controller is connected to a computer display and control system. Dressing components are provided inside the sealed box 1.

[0040] like Figure 1 and Figure 2As shown, the trimming assembly includes a tool disk 9 connected to the top of a sealed box 1 via a motor 8. Three scanning heads 23 are slidably mounted on the tool disk 9. The three scanning heads 23 are a mesh division and positioning scanning head, a 3D measurement and analysis scanning head, and a femtosecond laser head. The 3D measurement and analysis scanning head uploads data information to the 3D measurement and processing analysis platform, and the mesh division and positioning scanning head uploads data information to the mesh division and positioning analysis platform. All three scanning heads 23 are controlled by a computer display and control system.

[0041] The femtosecond laser head is connected to a five-axis galvanometer and a femtosecond laser control switch.

[0042] like Figure 1 and Figure 3 As shown, a pair of doors 3 are rotatably mounted on the outside of the sealed box 1. A positioning block 11 is provided on each door 3, which is slidably mounted by a dovetail groove 10. A pair of insert rods 12 are provided at the bottom of the positioning block 11. A positioning seat 4 is fixedly mounted on the other door 3. Both insert rods 12 are slidably mounted in the positioning seat 4.

[0043] When it is necessary to open the box door 3, lift the positioning block 11 upwards so that the insertion rod 12 at the bottom of the positioning block 11 is disengaged from the positioning seat 4. Then, rotate the box door 3 to both sides to open the box door 3.

[0044] like Figure 1 and Figure 4 As shown, a clamping assembly connected to a two-dimensional precision moving platform is provided on the bottom wall of the sealed box 1. The clamping assembly includes a clamping seat 18 fixedly connected to the two-dimensional precision moving platform. A fixing rod 19 passes through the clamping seat 18. A shaped block 20, a connecting ring 17, and a collar 22 are sequentially passed through the fixing rod 19. The bottom end of the collar 22 contacts the top wall of the two-dimensional precision moving platform. A lever 7 is connected to the outside of the collar 22. A moving seat 6 is provided on the outside of the lever 7 and is rotatably locked on the outer wall of the sealed box 1. Three grippers 14 are provided on the outside of the clamping seat 18 and are hinged by a fixing button 15. The grippers 14 are connected to the clamping seat 18 by a spring 13. The inner side of the bottom end of the grippers 14 contacts the push rod 16. The push rod 16 is slidably locked on the side wall of the clamping seat 18. One end of the push rod 16 contacts the arc surface 21 of the side wall of the shaped block 20.

[0045] When lever 7 is turned, the irregular block 20, which is engaged by connecting ring 17, will rotate on fixed rod 19. At this time, the arc surface 21 of the side wall of irregular block 20 will push push rod 16 outward. Meanwhile, since one end of push rod 16 is in contact with the inner side of the bottom end of jaw 14, and jaw 14 is hinged to the outside of clamping seat 18 by fixing button 15, and the inner side of the top of jaw 14 is connected to clamping seat 18 by spring 13, the top of jaw 14 moves inward, and spring 13 is compressed until jaw 14 clamps the diamond grinding tool to be dressed. At this time, the position of moving seat 6 outside lever 7 can be locked.

[0046] The diamond grinding wheel to be dressed is installed and fixed on the dressing platform by a fixing device. The computer display and control system can control the movement position and speed of the two-dimensional precision moving platform, thereby driving the planar movement of the diamond grinding wheel. The computer can also coordinate the movement of the two-dimensional precision moving platform and the tool disk 9.

[0047] The femtosecond laser head is fixed at the end of the tool disk 9. Equipped with a five-axis galvanometer, the femtosecond laser head is connected to a femtosecond laser controller. A computer display and control system ensures the laser spot is perpendicularly incident on the diamond grinding tool and precisely controls the laser's process parameters for diamond processing. The 3D scanning head is fixed at the end of the switching tool disk 9 and connected to a 3D measurement and processing analysis platform. A computer display and control system precisely controls the scanning position and speed of the 3D scanning head. The mesh generation and positioning scanning head is also fixed at the end of the tool disk 9 and connected to a mesh generation and positioning analysis platform. A computer display and control system precisely controls the scanning speed.

[0048] The entire femtosecond processing, 3D scanning, and mesh generation are all completed within the retractable sealed box 1. The side wall of the sealed box 1 has an air blowing hole and an air suction hole. The air blowing hose and the absorption hose are respectively inserted into the air blowing hole and the air suction hole, and can move relative to each other on the inner wall, thereby controlling the air blowing angle to align with the laser processing spot position. The computer display and control system can control the air blowing pressure and the air suction pressure of the air blowing hose and the absorption hose.

[0049] Before the finishing process begins, the entire scanning and finishing device (femtosecond laser head, 3D scanning head, and network positioning and dividing head) and the diamond grinding wheel are mounted on a precisely movable 2D finishing platform via clamping components. The computer display and control system controls the movement and displacement of the 2D platform along the X and Y axes. The femtosecond laser head is installed at position 1 on end 9 of the tool disk and connected to the femtosecond laser. The femtosecond laser uses a five-axis galvanometer to ensure perpendicular beam incidence and dynamic focusing for machining the diamond surface. The computer display and control system controls the process parameters of the femtosecond laser. The 3D scanning head is installed at position 2 on end 9 of the tool disk and connected to the 3D measurement and processing analysis platform. It transmits the scanned surface topography data to the computer display system for storage. The 3D measurement and processing analysis platform then performs detailed analysis on the scanned 3D graphics, setting the reference plane, the finishing height value, and the number of finishing layers.

[0050] After completing the 3D scanning and analysis, tool disk 9 rotates to position 3, and the meshing and positioning scanning head is mounted at position 3 and connected to the meshing and positioning analysis platform. This allows for the storage of the scanned surface data, which is then combined with data from the 3D measurement and processing analysis platform (reference plane, height values, and number of layers). Taking into account the spot size, the surface is meshed, and the two-dimensional coordinates of the mesh area and center are marked. Based on the two-dimensional mesh coordinates, the femtosecond laser head is precisely controlled by a computer to move to the two-dimensional mesh position. Based on the layer data and height value data, the laser process parameters required for each mesh are determined, thereby avoiding pits, bumps, and depressions, graphitization, and thermal cracks on the diamond surface during the trimming process, thus achieving the quality requirements for precise diamond surface trimming.

[0051] The actual femtosecond laser trimming process is completed in a retractable sealed trimming box. According to the trimming laser process parameters, the number of trimming layers, and the trimming height, the positions of the blowing and suction holes and the blowing and absorption pressures are adjusted to ensure that the trimming process is not affected by microscopic particles such as gas, thus avoiding particle return effects.

[0052] The maximum number of layers after 3D scanning is set to 3, with each layer having a trimming height of 10μm. The mesh generation and positioning analysis platform is configured with 50 horizontal and 100 vertical grids. The femtosecond laser output power is selected as 30W and 50W; the repetition frequency is 30kHz and 60kHz; the pulse overlap rate is 25% and 35%; and the trajectory line overlap rate is 50% and 60%. The aforementioned femtosecond laser trimming device, equipped with an air blowing and suction pipe, 3D scanning, mesh generation and positioning system, and a 3D laser trimming system, is used to trim diamond grinding tools. Its key features include a femtosecond laser with a peak power exceeding 10⁹ / cm², a femtosecond laser head equipped with a five-axis galvanometer to ensure trimming efficiency, and a 3D measurement and processing analysis platform that coordinates the trimming layer number with the mesh generation and positioning system. The trimming height value for each grid in each layer is set, and the center coordinates of the five-axis galvanometer within the trimming mesh are ensured.

[0053] The specific usage and function of this embodiment are as follows:

[0054] S1: Fix the diamond grinding wheel to be dressed onto the clamping assembly and determine the initial coordinates of the two-dimensional precision moving platform.

[0055] In this step, the diamond grinding wheel to be dressed is fixed on a platform that can move in two dimensions. The computer display and control system can move the center position of the diamond surface to be dressed to the coordinate center position of the femtosecond laser head under the tool disk 9, and can combine the data of the grid division positioning system to perform joint movement to ensure the accuracy of processing.

[0056] S2: Before trimming, switch the tool disk 9 to the 3D scanning head position. The computer display and control system controls the 3D scanning head to perform 3D scanning, and sets the trimming layer number, trimming height value, and trimming reference plane based on the scanning data.

[0057] In this step, the 3D scanning head first scans the 3D feature data of the diamond to be repaired and stores it in the 3D measurement and processing analysis platform analysis system. The 3D shape model of the diamond is displayed in the computer display and control system. After system analysis, the reference plane of the diamond is set, thereby obtaining the maximum height value and the number of layers to be repaired, thereby suppressing the accumulation of heat on the diamond surface during the repair process and reducing defects such as graphitization and hot cracks.

[0058] S3: Before trimming, after the 3D scanning head completes the scan, the tool disk 9 switches to the mesh positioning scanning head, and the computer display and control system controls the mesh division and positioning platform system to scan the diamond surface to be trimmed. Based on the scanned surface data, the size, range, number and shape of the surface mesh are set, and the center coordinate value of the mesh is marked.

[0059] In this step, before the trimming, the mesh positioning scanning head will first scan the data of the diamond surface to be trimmed, store it, and then display the shape of the diamond surface in the computer. It will be combined with the data obtained by the 3D scanning head, and after analysis by the mesh division and positioning platform system, the diamond surface to be trimmed will be meshed. At the same time, the shape of the mesh (rectangle, circle), the mesh size (length and width of the rectangle, radius of the circle), and the coordinates of the center position of the mesh with the center position of the tool disk 9 as the origin coordinates will be set.

[0060] S4: Before the adjustment, the data from the three-dimensional measurement and processing analysis platform and the mesh generation and positioning platform system are provided to the computer display and control system to control the process parameters of the femtosecond laser, the angle of the five-axis galvanometer, and the position parameters of the two-dimensional moving platform.

[0061] In this step, the computer display and control system obtains data from the 3D measurement and processing analysis platform and the mesh generation and positioning platform system, mainly including the number of layers, mesh center coordinates, and trimming height. The trimming height is provided to the femtosecond laser to select suitable laser process parameters; the mesh center coordinates are input into the 2D moving platform to control the movement parameters of the tool disk 9 and the diamond being trimmed; simultaneously, the five-axis galvanometer ensures that the laser beam is always perpendicularly incident on the diamond surface based on the coordinate values.

[0062] S5: Before trimming, open the air blowing port and air suction port on the side of the sealed box 1, and control the air blowing and air suction pressure of the air blowing hose and the air suction hose respectively, and adjust the air blowing and air suction angle to align with the position of the femtosecond laser trimming spot.

[0063] In this step, the blowing and suction ports on the side of the sealed box 1 are opened, and the blowing and suction hoses are inserted accordingly. The blowing and suction pressures, blowing and suction angles are controlled by the computer display and control system, and the position of the light spot is aligned to ensure that the femtosecond laser trimming, three-dimensional scanning data and grid division positioning scanning data are not affected by gas particles.

[0064] S6: During the trimming process, after each layer is trimmed by the femtosecond laser, a 3D scanning head and a grid positioning scanning head will be scanned online for detection. Based on the scan data, the number of trimming layers, the height value, and the grid data can be reset, and then the femtosecond laser trimming will be performed again.

[0065] In this step, the femtosecond laser begins to correct the diamond surface based on the set data. After the first layer of correction is completed, an online 3D scan is performed. The 3D measurement and processing analysis platform determines whether the number of correction layers and the correction height data need to be reset. If the correction data needs to be reset, a new mesh generation and positioning scan is performed, and the mesh is generated in conjunction with the correction data. Finally, the new data is input to the femtosecond laser for correction. If the correction data does not need to be set and the mesh scan is not restarted, the correction continues with the original data.

[0066] S7: Repeat steps 2-6 until the surface accuracy and quality of the diamond grinding wheel meet the dressing requirements.

[0067] The material selected for dressing is a bronze diamond grinding wheel, model number: |A| 100×12×5×31.75MBD100 / 150M100. Where |A| indicates a flat grinding wheel, 100 indicates an outer diameter of 100mm, 10 indicates a wheel width of 12mm, 5 indicates a bronze binder thickness of 5mm, and 31.75 indicates a mounting hole diameter of 31.75mm. MBD indicates metal-bonded diamond abrasives suitable for processing brittle non-metallic materials such as glass, ceramics, and soft stone. 100 / 80 indicates the diamond abrasive grain size, M indicates a metallic binder, and 100 indicates a 100% abrasive grain concentration.

[0068] The femtosecond laser was selected with an average output power of 30W, a repetition rate of 60kHz, a pulse overlap rate of 25%, and a trajectory overlap rate of 60%. The trimming layers were set to 3, each with a trimming height of 10μm, and the circular grid diameter was 10μm. The horizontal grid size was 50, and the vertical grid size was 100. The blowing pressure of the blowing hose was 0.8MPa, and the suction pressure of the suction hose was 0.6MPa. The blowing angle was 45°, and the suction angle was 35°. Three-dimensional super-depth of field (100x) observation was employed. Figure 7As can be seen, the material distribution on the repaired diamond surface is uniform, avoiding pits, bumps and depressions that may occur during the repair process. This reduces the heat accumulation and heat diffusion effects of the diamond, preventing defects such as thermal cracks and graphite metamorphic layers on the surface. The repaired diamond surface has high quality and good topography.

[0069] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A femtosecond laser dressing device for diamond grinding wheels, characterized in that: The system includes a sealed box (1), on which an adjusting ring (2) is rotatably mounted. The adjusting ring (2) is controlled by an electric motor. The adjusting ring (2) has multiple pairs of air holes (5), each pair of air holes (5) containing an air inlet and an air outlet. Each air hole (5) is fitted with a flexible hose. All the flexible hoses are controlled by a comprehensive exhaust and suction controller, which is connected to a computer display and control system. The sealed box (1) is equipped with a trimming component.

2. The femtosecond laser dressing device for diamond grinding wheels according to claim 1, characterized in that: The trimming assembly includes a tool disk (9) connected to the top of the sealed box (1) via a motor (8). Three scanning heads (23) are slidably mounted on the tool disk (9). The three scanning heads (23) are a mesh division and positioning scanning head, a three-dimensional measurement and analysis scanning head, and a femtosecond laser head. The three-dimensional measurement and analysis scanning head uploads data information to the three-dimensional measurement and processing analysis platform. The mesh division and positioning scanning head uploads data information to the mesh division and positioning analysis platform. All three scanning heads (23) are controlled by a computer display and control system.

3. The femtosecond laser dressing device for diamond grinding wheels according to claim 2, characterized in that: The femtosecond laser head is connected to a five-axis galvanometer and a femtosecond laser control switch.

4. The femtosecond laser dressing device for diamond grinding wheels according to claim 3, characterized in that: The sealed box (1) is provided with a pair of doors (3) on the outside. Each door (3) is provided with a positioning block (11) that is slidably engaged by a dovetail groove (10). The bottom end of the positioning block (11) is provided with a pair of insert rods (12). The other door (3) is fixedly provided with a positioning seat (4). Both insert rods (12) are slidably engaged in the positioning seat (4).

5. The femtosecond laser dressing device for diamond grinding wheels according to claim 4, characterized in that: The sealing box (1) is provided with a clamping assembly connected to a two-dimensional precision moving platform on its inner bottom wall. The clamping assembly includes a clamping seat (18) fixedly connected to the two-dimensional precision moving platform. A fixing rod (19) is inserted through the clamping seat (18). A shaped block (20), a connecting ring (17), and a collar (22) are sequentially inserted through the fixing rod (19). The bottom end of the collar (22) contacts the inner top wall of the two-dimensional precision moving platform. A lever (7) is connected to the outside of the collar (22). 7) The movable seat (6) on the outer side is rotatably locked on the outer wall of the sealed box (1). The clamping seat (18) has three jaws (14) hinged by fixing buttons (15) on the outer side. The jaws (14) are connected to the clamping seat (18) by springs (13). The inner side of the bottom end of the jaws (14) is in contact with the push rod (16). The push rod (16) is slidably locked on the side wall of the clamping seat (18). One end of the push rod (16) is in contact with the arc surface (21) of the side wall of the irregular block (20).

6. The femtosecond laser dressing method for diamond abrasives according to claim 5, characterized in that, Includes the following steps: S1: Fix the diamond grinding wheel to be dressed onto the clamping assembly and determine the initial coordinates of the two-dimensional precision moving platform. S2: Switch the tool disk to the 3D scanning head position. The computer display and control system controls the 3D scanning head to perform 3D scanning, and sets the trimming layer number, trimming height value, and trimming reference plane based on the scanning data. S3: After the 3D scanning head completes the scan, the tool disk switches to the mesh positioning scanning head, and the computer display and control system controls the mesh division and positioning platform system to scan the trimmed diamond surface. Based on the scanned surface data, the size, range, number and shape of the surface mesh are set, and the center coordinate values ​​of the mesh are marked. S4: Provides the data from the 3D measurement and processing analysis platform and the mesh generation and positioning platform system to the computer display and control system to control the process parameters of the femtosecond laser, the angle of the five-axis galvanometer, and the position parameters of the 2D moving platform. S5: Open the air blowing port and air suction port on the side of the sealed box, and control the air blowing and air suction pressure of the air blowing hose and the air suction hose respectively. Adjust the air blowing and air suction angles with the adjustment ring to align with the position of the femtosecond laser trimming spot. S6: After each layer is trimmed by femtosecond laser, a 3D scanning head and a grid positioning scanning head will be scanned online for detection. Based on the scan data, the number of trimmed layers, the height value and the grid data can be reset, and then the femtosecond laser trimming will be performed again. S8: Repeat S2-S6 until the surface accuracy and quality of the diamond grinding wheel meet the dressing requirements.

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