Intelligent numerical control blade taper hole accurate grinding device and method based on high-precision laser scanning

Abstract

The invention discloses an intelligent numerical control blade taper hole accurate grinding device based on high-precision laser scanning, the device comprises clamping modules, a guide module, a power module and a scanning and grinding module, the clamping modules are respectively clamped on the upper plane and the lower plane of a propeller taper hole; the power module is used for providing power for the scanning and grinding module, and the power module and the scanning and grinding module are installed on the clamping module. After the high-precision laser scanning equipment is used for measuring deviations of all parts in propeller and shaft taper holes, the positive deviation parts in the propeller taper holes are accurately polished, high points are removed, the propeller and shaft taper surfaces are tightly attached, the working efficiency is effectively improved, the labor intensity is reduced, and the production cost is saved.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to an intelligent CNC propeller cone hole precision grinding device and method based on high-precision laser scanning. Background Technology

[0002] Large ships generally use propeller propulsion devices. Now, the tail shaft and propeller cone holes are connected by hydraulic keyless connection. The contact area of ​​the propeller shaft cone hole is required to be more than 75%, and the contact points are uniform, with 2 to 3 contact points per square foot.

[0003] Because both the tail shaft and propeller are ultra-large components, weighing tens of tons, precision control during machining is extremely difficult. For example, the designed taper of the propeller shaft cone is 1:20. The tail shaft is machined on a large horizontal lathe, and the propeller on a large vertical lathe. Due to factors such as equipment precision, tool precision, environment, and differences in local materials, the actual taper of both cannot reach 1:20±0.00 during machining, and there are also deviations in roundness. Directly machining them for assembly cannot achieve the technical requirements of a contact area of ​​over 75% and uniform contact points, with 2-3 contact points per square foot.

[0004] The traditional method involves allowing a 0.15mm grinding allowance during the machining of the propeller blade conical hole, and then manually adjusting it using a brushing technique. A 0.01mm thick layer of blue oil is applied to the surface of the tail shaft conical body. The tail shaft conical body is then inserted into the propeller blade conical hole, where the raised points inside the hole will contact the tail shaft conical body, imprinting the blue oil onto them. After the tail shaft is removed, the raised points imprinted with blue oil are manually ground. Once all the raised points in the entire conical hole have been ground, the blue-oiled tail shaft is reinserted, and the raised points are ground again. This process is repeated multiple times until the contact points are evenly distributed, with a contact area of ​​over 75%, and 2-3 contact points per square foot. The propeller blade brushing is then complete. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an intelligent CNC propeller cone hole precision grinding device and method based on high-precision laser scanning. The device and method of this invention use this high-precision laser scanning equipment to measure the deviations existing in various parts of the propeller and shaft cone holes, and then precisely grind the positive deviation parts in the propeller cone holes to remove high points, so that the propeller and shaft cone surfaces fit tightly, effectively improving work efficiency, reducing labor intensity, and saving production costs.

[0006] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows: A high-precision laser scanning-based intelligent CNC propeller cone hole precision grinding device includes a clamping module, a guiding module, a power module, and a scanning and grinding module. The clamping module clamps the upper and lower surfaces of the propeller cone hole, respectively. The power module provides power to the scanning and grinding module. The power module and the scanning and grinding module are mounted on the clamping module. The clamping module includes a support and legs. The support includes an upper support and a lower support, and the legs include upper legs and lower legs. Upper legs are mounted at both ends of the upper support, and lower legs are mounted at both ends of the lower support. The upper and lower supports are symmetrically mounted on the propeller cone hole. At both ends of the propeller cone hole, a guide module is installed between the upper and lower supports. The power module includes a cornering power structure, a vertical movement power structure, and a grinding power structure. The cornering power structure is installed on the upper support, the vertical movement power structure is installed on the upper end of the guide module, the scanning and grinding module is installed on the guide module, and the grinding power structure is installed on the scanning and grinding module. The cornering power structure is used to drive the scanning and grinding module to rotate, the vertical movement power structure is used to drive the scanning and grinding module to move up and down along the guide module, and the grinding power structure is used to adjust the horizontal position of the scanning and grinding module.

[0007] Furthermore, the upper support is generally rectangular, with two oval holes at each end, a bearing hole in the middle, multiple bolt holes around the bearing hole, a platform on one side, and the oval holes at both ends of the upper support being fixed to the upper support leg by bolts.

[0008] Furthermore, the cornering power structure includes a cornering variable speed motor and a worm gear reducer. The cornering variable speed motor is mounted on the platform, and the worm gear reducer is mounted on the bearing hole of the upper bracket. The worm gear reducer is connected and fixed to the bolt hole on the upper bracket by bolts. The cornering variable speed motor is connected to the input shaft of the worm gear reducer.

[0009] Furthermore, the upper support leg is U-shaped, and round holes are provided at both ends of the upper support leg. The round holes at the upper end of the upper support leg are connected and fixed to the oval holes of the upper bracket by bolts. The lower end of the upper support leg is connected to the base plate. The base plate is respectively set on the upper and lower planes of the propeller cone hole. The base plates on the upper and lower planes of the propeller cone hole are connected and fixed by long bolts, so that the base plate is clamped on the propeller cone hole.

[0010] Furthermore, the lower support, lower leg, and base plate below the lower plane of the propeller cone hole are respectively symmetrically arranged with the upper support, upper leg, and base plate above the upper plane of the propeller cone hole. The upper support and lower support have the same structure, and the lower leg and upper leg have the same structure.

[0011] Furthermore, an upper shaft plate is installed in the bearing hole of the upper bracket. The guide module includes a guide rod, an upper shaft plate, and a lower shaft plate. An end shaft is provided in the middle of the upper shaft plate, and reamed round holes are provided at the four corners of the upper shaft plate. A bearing is provided in the end shaft of the upper shaft plate, and the bearing in the end shaft of the upper shaft plate is connected to the output shaft below the turbine reducer. A lower shaft plate is provided in the bearing hole in the middle of the lower bracket. Guide rods are provided at the four corners of the lower shaft plate and the four corners of the upper shaft plate, and the two ends of the guide rods are respectively connected and fixed to the four corners of the lower shaft plate and the four corners of the upper shaft plate. A vertical moving power structure is installed on the lower end face of the upper shaft plate, and a bearing seat is provided in the middle of the upper end of the lower shaft plate. A ball screw is provided between the bearing seat and the vertical moving power structure.

[0012] Furthermore, the up-and-down moving power structure includes a gearbox and a moving feed motor. The gearbox is installed in the middle of the lower end face of the upper shaft disk, and the moving feed motor is installed at the lower end of the gearbox. The gearbox and the ball screw are connected by gears. The moving feed motor drives the gearbox to rotate, and the gearbox drives the ball screw to rotate. A scanning and polishing module is sleeved on the screw.

[0013] Furthermore, the scanning and polishing module includes a moving stage, a slide, a feed speed-changing motor, a laser scanner, and an electric polishing head. The moving stage is a hollow cuboid shape and includes an upper platform and a lower platform. The upper platform has guide rod holes at its four corners and lead screw holes at its front and rear ends, with internal threads inside the lead screw holes. Multiple bolt holes are also provided in the middle of the upper platform. The lower platform has the same structure as the upper platform. The upper surface of the upper platform is equipped with a laser scanner. A slide is located between the upper and lower platforms. An electric polishing head is located at one end of the slide, and the other end of the slide is connected to the feed speed-changing motor via gears. The slide includes a base and a moving platform. The base is bolted to the lower platform, and the moving platform is mounted on the base and slides on the base. A transmission screw is located in the middle of the moving platform, driving the moving platform to slide on the base. The transmission screw is connected to the feed speed-changing motor via gear transmission.

[0014] A method for precision grinding of conical holes in intelligent CNC propeller blades based on high-precision laser scanning, employing the aforementioned precision grinding device for conical holes in intelligent CNC propeller blades based on high-precision laser scanning, is characterized by the following steps: S1, start the angle variable speed motor and the moving feed motor, so that the laser scanner on the moving table moves up and down while rotating. The laser scanner scans the propeller cone hole to obtain the actual shape and position dimension data of the propeller cone hole; after the tail shaft cone is processed, a high-precision laser scanning instrument is used to scan the cone to obtain the actual shape and position dimensions of the cone, including the outer diameter, taper and ellipticity. S2. Input the acquired dimensional data into the software polywork to divide the propeller cone surface into virtual meshes, align the installation "0" position of the cone and the cone hole, compare the data of the cone and the cone hole corresponding to each virtual mesh, and obtain the required grinding height for each virtual mesh. S3, according to the required grinding height of each virtual grid, when grinding each virtual grid, the moving feed motor drives the ball screw to rotate, the ball screw drives the moving table to move up and down, so that the grinding head moves to the same height as the virtual grid to be ground, and then the rotary speed change motor drives the upper shaft disk to rotate, the upper shaft disk drives the lower shaft disk to rotate through the guide rod, the guide rod drives the moving table to rotate, so that the electric grinding head on the moving table rotates to the virtual grid to be ground; S4. Start the electric grinding head to grind. Repeat step S3 until all virtual meshes are ground. Then repeat steps S1 and S2 to obtain the cone hole size after grinding and compare it with the theoretical value. After the cone hole size is qualified, remove the silent device to complete the cone grinding.

[0015] Furthermore, the rotation angle range of the mobile platform is ±200°.

[0016] Based on the above technical solution, the method for hoisting a chimney section based on structural openings, as described in this invention patent, has achieved the following technical advantages through practical application: 1. This invention, based on a high-precision laser scanning intelligent CNC propeller cone hole precision grinding device, uses this high-precision laser scanning equipment to measure the deviations existing in various parts of the propeller and shaft cone holes. After that, it precisely grinds the positive deviation parts in the propeller cone hole, removes high points, and makes the propeller and shaft cone surfaces fit tightly, effectively improving work efficiency, reducing labor intensity, and saving production costs. It changes the long-standing problem that the propeller and shaft cone hole fit during shipbuilding relies entirely on manual grinding, which is labor-intensive, has a long construction period, is difficult to operate, and has poor precision control. Attached Figure Description

[0017] Figure 1 This is a front view of the precision grinding device in the intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning of the present invention.

[0018] Figure 2 This is a side view of the precision grinding device in the intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning of the present invention.

[0019] Figure 3 This is a front view of the upper support in the intelligent CNC blade conical hole precision grinding device based on high-precision laser scanning of the present invention.

[0020] Figure 4 This is a side view of the upper support in the intelligent CNC blade conical hole precision grinding device based on high-precision laser scanning of the present invention.

[0021] Figure 5 This is a front view of the upper shaft disk in the intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning of the present invention.

[0022] Figure 6 This is a front view of the moving stage in the intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning of the present invention.

[0023] Figure 7 This is a top view of the lower platform in the intelligent CNC blade conical hole precision grinding device based on high-precision laser scanning of the present invention.

[0024] Figure 8 This is a top view of the slide table in the intelligent CNC blade conical hole precision grinding device based on high-precision laser scanning of the present invention.

[0025] Figure 9 This is a side view of the slide table in the intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided with reference to the accompanying drawings. The invention is described using specific examples shown. However, it should be understood that these descriptions are merely exemplary. This description is intended not to limit the scope of the invention. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the invention.

[0027] like Figure 1-9As shown, an intelligent CNC propeller conical hole precision grinding device based on high-precision laser scanning is disclosed. The device includes a clamping module, a guiding module, a power module, and a scanning and grinding module. The clamping module clamps the upper and lower surfaces of the propeller conical hole, respectively. The power module provides power to the scanning and grinding module. The power module and the scanning and grinding module are mounted on the clamping module. The clamping module includes a support and legs. The support includes an upper support 3 and a lower support 6. The legs include upper legs 4 and lower legs 7. Upper legs 4 are mounted at both ends of the upper support 3, and lower legs 7 are mounted at both ends of the lower support 6. The upper support 3 and lower support 6 are symmetrical. Installed at both ends of the propeller cone hole, a guide module is installed between the upper support 3 and the lower support 6. The power module includes a cornering power structure, a vertical movement power structure, and a grinding power structure. The cornering power structure is installed on the upper support 3, the vertical movement power structure is installed on the upper end of the guide module, the scanning and grinding module is installed on the guide module, and the grinding power structure is installed on the scanning and grinding module. The cornering power structure is used to drive the scanning and grinding module to rotate, the vertical movement power structure is used to drive the scanning and grinding module to move up and down along the guide module, and the grinding power structure is used to adjust the horizontal position of the scanning and grinding module.

[0028] The upper support 3 is generally rectangular. Two oval holes are provided at both ends of the upper support 3. A bearing hole is provided in the middle of the upper support 3. Multiple bolt holes are provided around the bearing hole. A platform 31 is provided on one side of the upper support 3. The oval holes at both ends of the upper support 3 are connected and fixed to the upper support leg 4 by bolts.

[0029] The cornering power structure includes a cornering variable speed motor 1 and a turbine reducer 2. The cornering variable speed motor 1 is mounted on the platform, and the turbine reducer 2 is mounted on the bearing hole of the upper bracket 3. The turbine reducer 2 is connected and fixed to the bolt hole on the upper bracket 3 by bolts. The cornering variable speed motor 1 is connected to the input shaft of the turbine detector.

[0030] The upper support leg 4 is U-shaped in general. The upper support leg 4 has round holes at both ends. The round holes at the upper end of the upper support leg 4 are connected and fixed to the oval holes of the upper bracket 3 by bolts. The lower end of the upper support leg 4 is connected to the base plate 5. The base plate 5 is respectively set on the upper and lower planes of the propeller cone hole. The base plates 5 on the upper and lower planes of the propeller cone hole are connected and fixed by long bolts, so that the base plate 5 is clamped on the propeller cone hole.

[0031] The lower support 6, lower support leg 7 and base plate 5 below the lower plane of the propeller cone hole are respectively symmetrically arranged with the upper support 3, upper support leg 4 and base plate 5 above the upper plane of the propeller cone hole. The upper support 3 and lower support 6 have the same structure, and the lower support leg 7 and upper support leg 4 have the same structure.

[0032] An upper shaft plate 17 is installed in the bearing hole of the upper bracket 3. The guide module includes a guide rod 8, an upper shaft plate 17, and a lower shaft plate. An end shaft is provided in the middle of the upper shaft plate 17. Reamed round holes are provided at the four corners of the upper shaft plate 17. A bearing is provided in the end shaft of the upper shaft plate 17. The bearing in the end shaft of the upper shaft plate 17 is connected to the output shaft below the turbine reducer 2. A lower shaft plate is provided in the bearing hole in the middle of the lower bracket 6. Guide rods 8 are provided at the four corners of the lower shaft plate and the four corners of the upper shaft plate 17. The two ends of the guide rods 8 are connected and fixed to the four corners of the lower shaft plate and the four corners of the upper shaft plate 17, respectively. A vertical moving power structure is installed on the lower end face of the upper shaft plate 17. A bearing seat is provided in the middle of the upper end of the lower shaft plate. A ball screw 16 is provided between the bearing seat and the vertical moving power structure.

[0033] The up-and-down moving power structure includes a gearbox 14 and a moving feed motor 15. The gearbox 14 is installed in the middle of the lower end face of the upper shaft disk 17, and the moving feed motor 15 is installed at the lower end of the gearbox 14. The gearbox 14 is connected to the ball screw 16 through gears. The moving feed motor 15 drives the gearbox 14 to rotate, and the gearbox 14 drives the ball screw 16 to rotate. A scanning and polishing module is sleeved on the screw.

[0034] The scanning and polishing module includes a moving stage 10, a sliding stage 18, a feed speed-changing motor 9, a laser scanner 12, and an electric polishing head 11. The moving stage 10 is a hollow cuboid shape and includes an upper platform 101 and a lower platform 102. The upper platform 101 has guide rod holes 103 at its four corners and lead screw holes 104 at its front and rear ends, with internal threads inside the lead screw holes 104. Multiple bolt holes are also provided in the middle of the upper platform 101. The lower platform 102 has the same structure as the upper platform 101. The upper surface of the upper platform 101 is provided with a laser scanner. A slide 18 is provided between the optical scanner 12, the upper platform 101, and the lower platform 102. One end of the slide 18 is equipped with an electric grinding head 11, and the other end of the slide 18 is connected to the feed speed-changing motor 9 via gears. The slide 18 includes a base and a moving platform. The base is bolted to the lower platform 102, and the moving platform is mounted on the base and slides on the base. A transmission screw is provided in the middle of the moving platform, which drives the moving platform to slide on the base. The transmission screw is connected to the feed speed-changing motor 9 via gear transmission. The feed speed-changing motor 9 is installed on the lower end face of the lower platform 102.

[0035] A method for precision grinding of conical holes in intelligent CNC propeller blades based on high-precision laser scanning, employing the aforementioned precision grinding device for conical holes in intelligent CNC propeller blades based on high-precision laser scanning, is characterized by the following steps: S1, start the angle variable speed motor and the moving feed motor 15, so that the laser scanner 12 on the moving table 10 moves up and down while rotating. The laser scanner 12 scans the propeller cone hole to obtain the actual shape and position dimension data of the propeller cone hole; after the tail shaft cone is processed, a high-precision laser scanning instrument is used to scan the cone to obtain the actual shape and position dimensions of the cone, including the outer diameter, taper and ellipticity. S2. Input the acquired dimensional data into the software polywork to divide the propeller cone surface into virtual meshes, align the installation "0" position of the cone and the cone hole, and compare the data of the cone 13 and the cone hole corresponding to each virtual mesh to obtain the required grinding height of each virtual mesh. S3, according to the required grinding height of each virtual grid, when grinding each virtual grid, the moving feed motor 15 drives the ball screw 16 to rotate, the ball screw 16 drives the moving table 10 to move up and down, so that the grinding head moves to the same height as the virtual grid to be ground, and then the rotary speed change motor 1 drives the upper shaft disk 17 to rotate, the upper shaft disk 17 drives the lower shaft disk to rotate through the guide rod 8, the guide rod 8 drives the moving table 10 to rotate, so that the electric grinding head 11 on the moving table 10 rotates to the virtual grid to be ground; S4, start the electric grinding head 11 to grind, repeat step S3 until all virtual meshes are ground, then repeat steps S1 and S2 to obtain the cone hole size after grinding and compare it with the theoretical value. After the cone hole size is qualified, remove the silent device to complete the cone grinding.

[0036] The rotation angle range of the mobile platform 10 is ±200°.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, the scope of the invention is not limited to this. Those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solution claimed in the present invention.

Claims

1. A smart CNC paddle cone hole precision grinding device based on high-precision laser scanning, characterized in that, The device includes a clamping module, a guiding module, a power module, and a scanning and polishing module. The clamping module clamps the upper and lower surfaces of the propeller conical bore, respectively. The power module provides power to the scanning and polishing module. The power module and the scanning and polishing module are mounted on the clamping module. The clamping module includes a bracket and legs. The bracket includes an upper bracket and a lower bracket. The legs include upper legs and lower legs. Upper legs are mounted at both ends of the upper bracket, and lower legs are mounted at both ends of the lower bracket. The upper and lower brackets are symmetrically mounted at both ends of the propeller conical bore. A guide module is installed between the supports. The power module includes a corner power structure, a vertical movement power structure, and a grinding power structure. The corner power structure is installed on the upper support, the vertical movement power structure is installed on the upper end of the guide module, the scanning and grinding module is installed on the guide module, and the grinding power structure is installed on the scanning and grinding module. The corner power structure is used to drive the scanning and grinding module to rotate, the vertical movement power structure is used to drive the scanning and grinding module to move up and down along the guide module, and the grinding power structure is used to adjust the horizontal position of the scanning and grinding module.

2. The intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning according to claim 1, characterized in that, The upper support is rectangular in shape. Two oval holes are provided at each end of the upper support. A bearing hole is provided in the middle of the upper support. Multiple bolt holes are provided around the bearing hole. A platform is provided on one side of the upper support. The oval holes at both ends of the upper support are connected and fixed to the upper support legs by bolts.

3. The intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning according to claim 2, characterized in that, The cornering power structure includes a cornering variable speed motor and a worm gear reducer. The cornering variable speed motor is mounted on the platform, and the worm gear reducer is mounted on the bearing hole of the upper bracket. The worm gear reducer is connected and fixed to the bolt hole on the upper bracket by bolts. The cornering variable speed motor is connected to the input shaft of the worm gear reducer.

4. The intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning according to claim 2, characterized in that, The upper support leg is U-shaped, with round holes at both ends. The round holes at the upper end of the upper support leg are connected and fixed to the oval holes of the upper bracket by bolts. The lower end of the upper support leg is connected to the base plate. The base plate is set on the upper and lower planes of the propeller cone hole. The base plates on the upper and lower planes of the propeller cone hole are connected and fixed by long bolts, so that the base plate is clamped on the propeller cone hole.

5. The intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning according to claim 4, characterized in that, The lower support, lower leg, and base plate below the lower plane of the propeller cone hole are respectively symmetrically arranged with the upper support, upper leg, and base plate above the upper plane of the propeller cone hole. The upper support and lower support have the same structure, and the lower leg and upper leg have the same structure.

6. The intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning according to claim 3, characterized in that, An upper shaft plate is installed in the bearing hole of the upper bracket. The guide module includes a guide rod, an upper shaft plate, and a lower shaft plate. An end shaft is provided in the middle of the upper shaft plate. Reamed round holes are provided at the four corners of the upper shaft plate. A bearing is provided in the end shaft of the upper shaft plate. The bearing in the end shaft of the upper shaft plate is connected to the output shaft below the turbine reducer. A lower shaft plate is provided in the bearing hole in the middle of the lower bracket. Guide rods are provided at the four corners of the lower shaft plate and the four corners of the upper shaft plate. The two ends of the guide rods are connected and fixed to the four corners of the lower shaft plate and the four corners of the upper shaft plate, respectively. A vertical moving power structure is installed on the lower end face of the upper shaft plate. A bearing seat is provided in the middle of the upper end of the lower shaft plate. A ball screw is provided between the bearing seat and the vertical moving power structure.

7. The intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning according to claim 6, characterized in that, The up-and-down moving power structure includes a gearbox and a moving feed motor. The gearbox is installed in the middle of the lower end face of the upper shaft disk, and the moving feed motor is installed at the lower end of the gearbox. The gearbox and the ball screw are connected by gears. The moving feed motor drives the gearbox to rotate, and the gearbox drives the ball screw to rotate. A scanning and grinding module is sleeved on the screw.

8. The intelligent CNC paddle cone hole precision grinding device based on high-precision laser scanning according to claim 7, characterized in that, The scanning and polishing module includes a moving stage, a slide, a feed speed-changing motor, a laser scanner, and an electric polishing head. The moving stage is a hollow cuboid and includes an upper platform and a lower platform. The upper platform has guide rod holes at its four corners and lead screw holes at its front and rear ends, with internal threads inside the lead screw holes. Multiple bolt holes are also located in the middle of the upper platform. The lower platform has the same structure as the upper platform. The laser scanner is located on the upper surface of the upper platform. A slide is located between the upper and lower platforms, with an electric polishing head at one end and the other end connected to the feed speed-changing motor via gears. The slide includes a base and a moving platform. The base is bolted to the lower platform, and the moving platform is mounted on the base and slides on the base. A transmission screw is located in the middle of the moving platform, driving the moving platform to slide on the base. The transmission screw is connected to the feed speed-changing motor via gear transmission.

9. A method for precision grinding of conical holes in intelligent CNC propeller blades based on high-precision laser scanning, comprising using the intelligent CNC propeller blade conical hole precision grinding device based on high-precision laser scanning as described in any one of claims 1-8, characterized in that, The method specifically includes the following steps: S1, start the angle variable speed motor and the moving feed motor, so that the laser scanner on the moving table moves up and down while rotating. The laser scanner scans the propeller cone hole to obtain the actual shape and position dimension data of the propeller cone hole; after the tail shaft cone is processed, a high-precision laser scanning instrument is used to scan the cone to obtain the actual shape and position dimensions of the cone, including the outer diameter, taper and ellipticity. S2. Input the acquired dimensional data into the software polywork to perform virtual meshing on the propeller cone surface, align the installation "0" position of the cone and the cone hole, compare the data of the cone and the cone hole corresponding to each virtual mesh, and obtain the required grinding height for each virtual mesh. S3, according to the required grinding height of each virtual grid, when grinding each virtual grid, the moving feed motor drives the ball screw to rotate, the ball screw drives the moving table to move up and down, so that the grinding head moves to the same height as the virtual grid to be ground, and then the rotary speed change motor drives the upper shaft disk to rotate, the upper shaft disk drives the lower shaft disk to rotate through the guide rod, the guide rod drives the moving table to rotate, so that the electric grinding head on the moving table rotates to the virtual grid to be ground; S4. Start the electric grinding head to grind. Repeat step S3 until all virtual meshes are ground. Then repeat steps S1 and S2 to obtain the cone hole size after grinding and compare it with the theoretical value. After the cone hole size is qualified, remove the silent device to complete the cone grinding.

10. The method for precision grinding of the conical hole of an intelligent CNC propeller blade based on high-precision laser scanning according to claim 9, characterized in that, The rotation angle range of the mobile platform is ±200°.

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