Sharpening device for diamond grinding wheel

Abstract

The utility model relates to the technical field of microwave sharpening of a metal bond diamond grinding wheel, and discloses a sharpening device for a diamond grinding wheel, which is directly arranged on the surface of a machine tool, so that the grinding wheel does not need to be detached for sharpening, and in-place sharpening can be directly carried out on the machine tool. The metal bond diamond grinding wheel is sharpened under the condition that the size of a grinding wheel grinding machine and the size of a grinding wheel cover are considered in the design process, the microwave hose coaxial line mode is adopted for energy transmission, microwave energy is easier to gather, the sharpening efficiency is higher, the material removing mode is melting gasification, and the material removing efficiency is higher. The device is simple in structure, short in process, free of influence on the environment and obvious in environment-friendly and energy-saving benefits, is located in a microwave shielding range in the sharpening process, and does not cause harm to workers.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave dressing of metal-bonded diamond grinding wheels, and particularly relates to a dressing device for diamond grinding wheels. Background Art

[0002] Metal-bonded diamond grinding wheels have the characteristics of dense structure, high abrasive grain holding strength, etc., and are widely used in precision machining of difficult-to-machine materials such as engineering ceramics. However, due to the high hardness of the metal bond, its dressing is relatively difficult, and wheel dressing is the key to maintaining the grinding performance of the grinding wheel. At present, the Chinese patent document with the publication number CN112975753A discloses a method and device for directly dressing a metal-bonded grinding wheel by microwave. This device directly dresses the metal-bonded grinding wheel by microwave method. A part of the grinding wheel is placed in the waveguide cavity of the microwave, and a metal tip is placed near the grinding wheel. When the microwave is emitted, the grinding wheel is dressed in the waveguide cavity. At the same time, this invention disassembles and installs the grinding wheel on the dressing table for dressing.

[0003] However, the above device has some defects in the actual use process: the above device for microwave dressing of metal-bonded diamond grinding wheels does not consider the size of the grinding wheel, the size of the grinding wheel cover, and different types of grinding machines, cannot adapt to various working conditions, cannot perform in-situ dressing on the machine tool, has poor adaptability, the energy source is directly emitted from the microwave waveguide cavity, the dressing place is in a microwave resonant cavity, and the energy utilization rate is low and the dressing efficiency is low. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a dressing device for diamond grinding wheels.

[0005] The utility model is realized by adopting the following technical solutions: a dressing device for diamond grinding wheels, including a grinding machine body, a grinding wheel shaft is installed on the grinding machine body, a grinding wheel is fixedly connected to the grinding wheel shaft, a grinding wheel cover is arranged on the grinding machine body, the grinding wheel cover wraps the grinding wheel shaft and the grinding wheel, the upper surface of the grinding machine body is fixedly connected with a bottom plate, a microwave power supply is fixedly installed on the upper surface of the bottom plate by bolts, the microwave power supply is connected with a microwave generator through a wire, and the microwave generator is connected with a coaxial line.

[0006] By adopting the above technical solutions, using microwave energy for dressing diamond grinding wheels can significantly improve the dressing efficiency, reduce the dressing time and labor cost. Compared with the traditional dressing method, the microwave dressing technology has a higher energy utilization rate, reduces energy consumption and environmental pollution.

[0007] As a further improvement of the above solution, a lower fixing frame is fixedly installed on the upper surface of the bottom plate by bolts, an upper fixing frame is installed on the lower fixing frame, and the upper fixing frame can slide up and down.

[0008] Through the above technical solution, the fixing frame is used to support and connect the flexible metal net and shield microwave radiation, providing a microwave irradiation environment for the dressing of the metal-bonded diamond grinding wheel.

[0009] As a further improvement of the above solution, hollow circular bushings are fixedly installed at the centers of the four surfaces of the upper fixing frame through bolts.

[0010] As a further improvement of the above solution, a circular sliding rod is arranged inside the hollow circular bushing. An arcuate plate is fixedly installed on the surface of the circular sliding rod through bolts, and an L-shaped sliding plate is slidably connected to the surface of the arcuate plate.

[0011] Through the above technical solution, through the design of the hollow circular bushing and the circular sliding rod, relative sliding in the front-back direction can be achieved, increasing the flexibility and adjustability of the device. The L-shaped sliding plate can slide back and forth in the arcuate plate and is fixed in position through a threaded locking mechanism, providing a large adjustment range to meet the requirements of different working conditions.

[0012] As a further improvement of the above solution, a moving platform is fixedly connected to the upper surface of the bottom plate. A rotating platform is fixedly connected to the surface of the moving platform. The rotating platform is installed on the surface of the Z-axis. A rotating motor is fixedly connected to the surface of the rotating platform, and a needle tip fixing plate is fixedly connected to the driving shaft of the rotating motor.

[0013] Through the above technical solution, through the combined design of the moving platform and the rotating platform, the functions of moving and rotating in the X, Y, and Z directions are achieved, providing the control ability of multiple degrees of freedom to meet complex processing requirements. The needle tip fixing plate is installed on the driving shaft of the rotating motor, which can achieve precise rotation control, adapt to the processing requirements of different angles, and improve the flexibility of the device.

[0014] As a further improvement of the above solution, a metal net fixing plate is fixedly installed on the needle tip fixing plate through bolts. A coaxial line fixer is fixedly connected to the surface of the grinding machine body, and the coaxial line is fixedly connected to the surface of the needle tip fixing plate through the coaxial line fixer.

[0015] Through the above technical solution, the coaxial line is fixed on the needle tip fixing plate in the rotating platform of the moving platform and is fixed by means of bolt fastening through the coaxial line fixer.

[0016] As a further improvement of the above solution, a flexible metal net is arranged on the outer surface of the grinding wheel cover, and a metal needle tip is arranged below the grinding wheel. The metal needle tip is fixedly connected to the surface of the coaxial line.

[0017] Through the above technical solution, a flexible metal mesh is installed above the tip fixing plate and the metal mesh fixing plate. The tip fixing plate and the metal mesh fixing plate are connected by bolts, and the connecting bolts pass through the flexible metal mesh. During the installation of the flexible metal mesh and the grinding wheel cover, the flexible metal mesh completely wraps the protruding part of the grinding wheel cover. In the enclosed area formed by the flexible metal mesh and the grinding wheel cover, the metal tip, the grinding wheel, and the grinding wheel shaft are all within its scope. The entire dressing process of the grinding wheel is completely within the enclosed area formed by the flexible metal mesh and the grinding wheel cover, preventing microwave leakage and ensuring work safety.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] The present utility model is directly installed on the surface of the machine tool, and the grinding wheel does not need to be disassembled for dressing. It can be directly dressed in situ on the machine tool. During the design process, the dressing of the metal-bonded diamond grinding wheel is considered under conditions including the size of the grinding wheel grinder and the size of the grinding wheel cover. Moreover, the present utility model uses the coaxial line of the microwave hose for energy transmission, making it easier to concentrate the microwave energy, with higher dressing efficiency. The material removal method is melting and gasification, with a short process and no impact on the environment, having obvious environmental protection and energy-saving benefits. The device is within the microwave shielding range during the dressing process and will not harm the staff. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a dressing device for a metal-bonded diamond grinding wheel of the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the installation and movement of the coaxial tip of the present utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the grinding wheel cover of the present utility model and the positional relationship between the grinding wheel cover and the grinding wheel;

[0023] Figure 4 It is a schematic diagram of the installation and structure of the flexible metal mesh of the present utility model;

[0024] Figure 5 It is a schematic diagram of the installation and structure of the fixing bracket of the present utility model.

[0025] Main Symbol Explanation:

[0026] 11. Grinding machine body; 12. Grinding wheel shaft; A. Grinding wheel; 13. Grinding wheel cover; 21. Microwave power supply; 22. Microwave generator; 23. Coaxial line; 31. Upper fixing frame; 32. Lower fixing frame; 311. Hollow circular bushing; 312. Circular sliding rod; 313. Bow-shaped plate; 314. L-shaped sliding plate; 5. Moving platform; 51. Rotating platform; 52. Z-axis; 511. Tip fixing plate; 512. Rotating motor; 513. Metal mesh fixing plate; 514. Coaxial line fixer; 6. Flexible metal mesh; 7. Metal tip; 8. Bottom plate. Detailed implementation mode

[0027] Next, in combination with the accompanying drawings and the specific implementation mode, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0028] Embodiment:

[0029] Please refer to Figures 1-5 A dressing device for a diamond grinding wheel according to this embodiment includes a grinding machine body 11. A grinding wheel shaft 12 is installed on the grinding machine body 11. A grinding wheel A is fixedly connected to the grinding wheel shaft 12. A grinding wheel cover 13 is provided on the grinding machine body 11. The grinding wheel cover 13 wraps the grinding wheel shaft 12 and the grinding wheel A. The upper surface of the grinding machine body 11 is fixedly connected to a bottom plate 8. A microwave power supply 21 is fixedly installed on the upper surface of the bottom plate 8 by bolts. The microwave power supply 21 is connected to a microwave generator 22 through a wire. The microwave generator 22 is connected to a coaxial line 23. The microwave power supply 21 provides electrical energy and converts it into microwave energy. The microwave power supply 21 transmits the electrical energy to the microwave generator 22 through a wire. The microwave generator 22 converts the electrical energy into microwave energy. The microwave energy generated by the microwave generator 22 is transmitted to the grinding wheel A through the coaxial line 23. The coaxial line 23 ensures the effective transmission of the microwave energy and reduces the energy loss. The microwave energy acts on the surface of the grinding wheel A, locally heating and softening the metal bond, thereby realizing the dressing of the surface of the grinding wheel A.

[0030] A lower fixing frame 32 is fixedly installed on the upper surface of the bottom plate 8 by bolts. An upper fixing frame 31 is installed on the lower fixing frame 32. The upper fixing frame 31 can slide up and down. The lower fixing frame 32 is connected to the bottom plate 8 by a bolt connection method. The upper fixing frame 31 is sleeved on the lower fixing frame 32. The upper fixing frame 31 is fixed on the lower fixing frame 32 through a threaded fastening mechanism. When not fixed, the upper fixing frame 31 can also slide up and down relative to the lower fixing frame 32.

[0031] Hollow circular bushings 311 are fixedly installed at the centers of the four faces of the upper fixing frame 31 by bolts.

[0032] Inside the hollow circular bushing 311, there is a circular sliding rod 312. The surface of the circular sliding rod 312 is fixedly installed with an arcuate plate 313 through bolts. The surface of the arcuate plate 313 is slidably connected with an L-shaped sliding plate 314. Inside the hollow circular bushing 311, the circular sliding rod 312 is installed, and they can slide relatively back and forth and are locked by a threaded locking mechanism. The arcuate plate 313 is fixed to the circular sliding rod 312 by bolt connection. The L-shaped sliding plate 314 can be installed in the arcuate plate 313, and the L-shaped sliding plate 314 can slide relatively back and forth with respect to the arcuate plate 313. The arcuate plate 313 and the L-shaped sliding plate 314 are combined in pairs to form a square frame.

[0033] The upper surface of the bottom plate 8 is fixedly connected with a moving platform 5. The surface of the moving platform 5 is fixedly connected with a rotating platform 51. The rotating platform 51 is installed on the surface of the Z-axis 52. The surface of the rotating platform 51 is fixedly connected with a rotating motor 512. The drive shaft of the rotating motor 512 is fixedly connected with a needle tip fixing plate 511. The needle tip fixing plate 511 is installed on the drive shaft of the rotating motor 512 in the rotating platform 51. The moving platform 5 is fixed to the bottom plate 8, and the moving platform 5 can move in three directions of X, Y, and Z. The rotating platform 51 is installed on the Z-axis 52. The rotating motor 512 in the rotating platform 51 rotates to drive the needle tip fixing plate 511 to rotate.

[0034] The needle tip fixing plate 511 is fixedly installed with a metal mesh fixing plate 513 through bolts. The surface of the grinding machine body 11 is fixedly connected with a coaxial line fixer 514. The coaxial line 23 is fixedly connected to the surface of the needle tip fixing plate 511 through the coaxial line fixer 514. The coaxial line 23 is fixed to the needle tip fixing plate 511 in the rotating platform 51 of the moving platform 5 and is fixed by bolt tightening through the coaxial line fixer 514.

[0035] The outer surface of the grinding wheel cover 13 is provided with a flexible metal mesh 6. Below the grinding wheel A, there is a metal tip 7. The metal tip 7 is fixedly connected to the surface of the coaxial line 23. The flexible metal mesh 6 is fixed by a tip fixing plate 511 and a metal mesh fixing plate 513. The tip fixing plate 511 and the metal mesh fixing plate 513 are connected by bolts. The bolts pass through the flexible metal mesh 6 to ensure its firm fixation. The metal tip 7 is arranged below the grinding wheel A and is connected to the microwave generator 22 through the coaxial line 23. The function of the metal tip 7 is to serve as a focusing point of microwave energy to dress the grinding wheel A. The flexible metal mesh 6 completely wraps the protruding part of the grinding wheel cover 13, forming a closed area. This closed area contains the metal tip 7, the grinding wheel A, and the grinding wheel shaft 12. The microwave energy generated by the microwave generator 22 is transmitted to the metal tip 7 through the coaxial line 23. Narrow-gap discharge is formed between the metal tip 7 and the surface of the grinding wheel A, causing the metal bond to locally melt and vaporize, removing the metal bond. At the same time, the microwave energy has no effect on the diamond abrasive grains, making the diamond abrasive grains protrude, thereby realizing the dressing of the surface of the grinding wheel A. The closed area constructed by the flexible metal mesh 6 and the grinding wheel cover 13 ensures that the microwave energy will not leak into the external environment, guaranteeing the safety of the operator and the normal operation of the equipment.

[0036] In the embodiment of the present application, the implementation principle of a dressing device for a diamond grinding wheel is as follows: In order to achieve the complete dressing of a metal-bonded diamond grinding wheel with different heights, different sizes, different angles of the tip, and the grinding wheel, a grinding machine body 11 and a grinding wheel shaft 12 provided on the base are provided. A grinding wheel A is installed on the grinding wheel shaft 12, and the grinding wheel shaft 12 drives the grinding wheel A to rotate. A metal tip 7 is installed below the grinding wheel A. The metal tip 7 is placed in a coaxial line 23, and the coaxial line 23 is fixed on a tip fixing plate 511 in a rotating platform 51 in a moving platform 5 and fixed by a coaxial line fixer 514 in a bolt-tightening manner. The tip fixing plate 511 is installed on the drive shaft of a rotating motor 512 in the rotating platform 51. The moving platform 5 is fixed on a bottom plate 8, and the moving platform 5 can move in three directions of X, Y, and Z. The rotating platform 51 is installed on a Z-axis 52. The rotating motor 512 in the rotating platform 51 rotates, driving the tip fixing plate 511 to rotate. The tip fixing plate 511 drives the metal tip 7 to rotate, realizing the rotation movement to change the angle of the metal tip 7. The above mechanism drives the metal tip 7 to move in four directions of X, Y, Z, and R. When the moving platform 5 moves in the tangential direction of the grinding wheel A, the position of the metal tip 7 relative to the grinding wheel A can be adjusted. When the moving platform 5 moves in the axial direction, the metal tip 7 can move from the front end of the axis of the grinding wheel A to the rear end of the axis. When the rotating platform 51 in the moving platform 5 makes a rotating movement, the installation angle of the metal tip 7 can be changed, realizing the dressing of the metal-bonded diamond grinding wheel with different heights, different sizes, and different angles of the metal tip 7. In order to prevent the unstable closure of the flexible metal net 6 from falling off, resulting in microwave leakage and causing safety accidents, it is necessary to fasten the flexible metal net 6. The fastening of the flexible metal net 6 is mainly through an upper fixing frame 31 and a lower fixing frame 32. The lower fixing frame 32 is connected to the bottom plate 8 by a bolt connection method. The upper fixing frame 31 is sleeved on the lower fixing frame 32, and the upper fixing frame 31 is fixed on the lower fixing frame 32 by a thread fastening mechanism. When not fixed, the upper fixing frame 31 can also slide up and down relative to the lower fixing frame 32. Four hollow circular bushings 311 are installed at the centers of the four faces of the upper fixing frame 31 by a bolt connection method. A circular sliding rod 312 is installed inside the hollow circular bushing 311, and they can slide relatively back and forth and are locked by a thread locking mechanism. An arcuate plate 313 is fixed on the circular sliding rod 312 by a bolt connection method. An L-shaped sliding plate 314 can be installed in the arcuate plate 313, and the L-shaped sliding plate 314 can slide relatively back and forth relative to the arcuate plate 313. The arcuate plate 313 and the L-shaped sliding plate 314 are combined in pairs to form a square frame. When the square frame completely fits the flexible metal net 6, the thread locking mechanism is locked, so that the flexible metal net 6 tightly fits around the grinding wheel cover 13, and the L-shaped sliding plate 314 completely fixes the flexible metal net 6, achieving the effect of fixing the flexible metal net 6 and preventing microwave leakage.

[0037] The above embodiments are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A sharpening device for a diamond grinding wheel, characterized in that: The invention comprises a grinding machine body (11), a grinding wheel shaft (12) is mounted on the grinding machine body (11), a grinding wheel (A) is fixedly connected to the grinding wheel shaft (12), a grinding wheel cover (13) is arranged on the grinding machine body (11), the grinding wheel cover (13) wraps the grinding wheel shaft (12) and the grinding wheel (A), a bottom plate (8) is fixedly connected to the upper surface of the grinding machine body (11), a microwave power source (21) is fixedly mounted on the upper surface of the bottom plate (8) by means of bolts, the microwave power source (21) is connected to a microwave generator (22) by means of a wire, and the microwave generator (22) is connected to a coaxial line (23).

2. A dressing device for a diamond grinding wheel as claimed in claim 1, characterized in that: A lower fixing frame (32) is fixedly mounted on the upper surface of the bottom plate (8) by means of bolts, an upper fixing frame (31) is mounted on the lower fixing frame (32), and the upper fixing frame (31) can slide up and down.

3. A dressing device for a diamond grinding wheel as claimed in claim 2, characterized in that: Hollow circular bushings (311) are fixedly mounted at the centers of the four surfaces of the upper fixing frame (31) by means of bolts.

4. A dressing device for a diamond grinding wheel as claimed in claim 3, characterized in that: A circular sliding rod (312) is arranged inside the hollow circular bushing (311), a bow-shaped plate (313) is fixedly mounted on the surface of the circular sliding rod (312) by means of bolts, and an L-shaped sliding plate (314) is slidably connected to the surface of the bow-shaped plate (313).

5. A dressing device for a diamond grinding wheel as claimed in claim 1, characterized in that: The upper surface of the base plate (8) is fixedly connected to a movable platform (5), the surface of the movable platform (5) is fixedly connected to a rotating platform (51), the rotating platform (51) is mounted on the surface of a Z-axis (52), the surface of the rotating platform (51) is fixedly connected to a rotating motor (512), and the driving shaft of the rotating motor (512) is fixedly connected to a needle tip fixing plate (511).

6. A dressing device for a diamond grinding wheel as claimed in claim 5, characterized in that: The needle tip fixing plate (511) is fixedly mounted with a metal mesh fixing plate (513) by means of bolts, a coaxial line fixer (514) is fixedly connected to the surface of the grinding machine body (11), and the coaxial line (23) is fixedly connected to the surface of the needle tip fixing plate (511) by means of the coaxial line fixer (514).

7. A dressing device for a diamond grinding wheel as claimed in claim 1, characterized in that: The outer surface of the grinding wheel cover (13) is provided with a flexible metal mesh (6), and a metal needle tip (7) is provided below the grinding wheel (A), and the metal needle tip (7) is fixedly connected to the surface of the coaxial line (23).

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