A vitrified bond peripheral grinding wheel

Abstract

The present invention relates to a ceramic bond peripheral grinding wheel, comprising a base, a support structure, a pressure cover and a plurality of grinding discs; a plurality of water flow channels are arranged on the side wall of the support structure at intervals in the axial direction and communicate the inside and outside of the support structure; the pressure cover covers the top of the support structure and fixes the support body on the base, and a water inlet for injecting cold water into the support structure is arranged at the center of the pressure cover; a plurality of grinding discs are bonded to the outer side wall of the support structure, and a drainage groove connected to the water flow channel is formed between two adjacent grinding discs. The beneficial effects of the present invention are: 1. The external cooling method is converted to the internal cooling method; 2. The cooling effect is improved; 3. The bonding strength is ensured; 4. The cooling water flow rate per unit time is effectively improved; 5. The processing accuracy and roughness of the surface of the grinding workpiece are effectively improved; 6. The ability to prevent the grinding disc from falling off and flying out under the action of grinding force is improved; 7. The life of the grinding wheel is significantly improved.

Description

Technical Field

[0001] The invention relates to the field of grinding tools, in particular to a ceramic bond peripheral grinding wheel. Background Art

[0002] The existing ceramic bond peripheral grinding wheel includes a base and a ceramic diamond grinding disc. The ceramic diamond grinding disc is attached to the base using a special ceramic adhesive. The grinding wheel needs to be cooled during the processing process. Most of them are currently cooled externally. Some machines and grinding wheels with internal cooling structures are also difficult to ensure cooling water supply in the grinding area (the area where the grinding wheel and the workpiece are in contact) at any moment. When using external cooling, the rotation of the grinding wheel will form an airflow barrier on the outer wall and the end grinding surface, blocking the cooling water from entering the grinding area. In particular, the higher the speed, the stronger the airflow barrier effect, which is not suitable for high-speed grinding technology applications.

[0003] In the prior art, the ceramic bond peripheral grinding wheel mainly realizes the cooling and chip accommodating function of the grinding wheel by adjusting the number of pores in the bond. In theory, the more pores there are, the better the cooling and chip removal effect of the ceramic bond peripheral grinding wheel. However, the larger the number of pores, the worse the strength of the grinding wheel, which will directly affect the life of the grinding wheel.

[0004] For vitrified diamond grinding wheels, since the exposed height of diamond is less than half of the particle size, the space in the grinding area is small and is occupied and blocked by powder chips. When using external cooling, the outer wall of the grinding wheel brings a small amount of water into the grinding area. The finer the diamond, the less water is brought in. Therefore, the cooling effect is greatly limited, which in turn affects the grinding efficiency. Summary of the invention

[0005] In summary, in order to overcome the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a vitrified bond peripheral grinding wheel.

[0006] The technical solution of the present invention for solving the above-mentioned technical problems is as follows: a ceramic bond peripheral grinding wheel, comprising a base, a support structure, a pressure cover and a plurality of grinding discs; the support structure is a vertically arranged cylindrical structure, and a plurality of water flow channels connecting the inside and the outside of the support structure are arranged on the side wall of the support structure at intervals in the axial direction up and down; the base and the pressure cover are both annular plate structures, the support structure is on the base, the pressure cover covers the top of the support structure and fixes the support body on the base, and a water inlet for injecting cold water into the interior of the support structure is provided at the center of the pressure cover; a plurality of the grinding discs are circumferentially bonded to the outer side wall of the support structure through ceramic bonding and are spliced ​​with each other on the outside to form an annular grinding surface, and a drainage groove connected to the water flow channel is formed between two adjacent grinding discs.

[0007] On the basis of the above technical solution, the present invention can also make the following further improvements:

[0008] Furthermore, the supporting structure includes a plurality of spacers and a plurality of gaskets; the spacers are annular structures, all of the spacers are coaxially stacked up and down, and a plurality of gaskets arranged in a ring-shaped interval are provided between each two adjacent spacers, so that the upper spacer is suspended relative to the lower spacer and the water flow channel is formed; the grinding plate is bonded to the outer wall of the spacer by ceramic bonding.

[0009] Furthermore, a plurality of the gaskets are arranged in an annular manner and spaced apart from each other between two adjacent spacers and close to the inner side.

[0010] Furthermore, the outer edge of the spacer penetrates into the corresponding position in the grinding plate and bends downward to prevent the grinding plate from falling off when subjected to grinding force.

[0011] Furthermore, the gaskets between two adjacent spacers form a layer, the number of gaskets in each layer is equal, and the gaskets in different layers are aligned vertically.

[0012] Furthermore, it also includes a plurality of screws; the upper ends of the screws are located on the upper end surface of the pressure cover, and the lower ends thereof pass through all the spacers and the gaskets aligned up and down and are connected to corresponding positions on the base, thereby fixing the positions of the spacers and the gaskets relative to the base.

[0013] Furthermore, a through hole is provided at the center of the base, and a circular ring connecting the base with a machine tool spindle is axially fixed at the position of the through hole.

[0014] Furthermore, the grinding plate extends along the axial direction of the supporting structure, and the grinding plate is integrally formed or is formed by a plurality of grinding plate monomers arranged up and down and connected to each other.

[0015] Furthermore, the two sides of the grinding disc are wavy, rectangular, toothed or parallelogram shaped, and a gap is left between two adjacent grinding discs, and the gap forms the drainage groove.

[0016] Furthermore, the total arc lengths of all the grinding plates corresponding to any circle on the grinding surface are equal.

[0017] The beneficial effects of the present invention are:

[0018] 1. The ceramic bond peripheral grinding wheel is transformed from external cooling to internal cooling. In addition, the structural design of the grinding wheel does not require the equipment to have an internal cooling structure, reducing the equipment investment cost.

[0019] 2. Dense drainage grooves leading from the inside of the grinding wheel to the grinding surface are machined on the grinding surface of the ceramic diamond peripheral grinding wheel. This structure ensures that when the grinding wheel is working, there is cooling water supply in the grinding area at any moment, which improves the cooling effect, making it suitable for high-speed processing and conducive to a significant improvement in grinding efficiency.

[0020] 3. The supporting structure of the grinding wheel around the ceramic bond is a multi-layer spacer, and the spacer is provided with supporting points, i.e., gaskets, between the layers, forming a water flow channel between the layers. While satisfying the bonding area of ​​the grinding disc, the suspended area of ​​the grinding disc is reduced to ensure the bonding strength.

[0021] 4. The gaskets between the spacer layers of the support structure can form a vortex blade structure, which is conducive to the cooling water injected into the support structure cavity from the water inlet to flow from the inner diameter to the outer diameter in the radial direction through the centrifugal force, effectively increasing the cooling water flow rate per unit time, thereby improving the cooling effect.

[0022] 5. The drainage grooves between the grinding discs can be designed with a wave-like structure and the design concept of equal-shape consumption, so that the circumference of the effective working section of any circle on the grinding surface participating in the grinding process is equal, so that the grinding consumption of each circumference of the grinding surface is equal, ensuring that the shape of the grinding wheel remains unchanged during the grinding process, thereby effectively improving the processing accuracy and roughness of the surface of the ground workpiece.

[0023] 6. The connection method between the ceramic diamond grinding wheel and the spacer of the supporting structure adds a mechanical embedded and meshing anti-flying structure on the basis of the adhesive bonding method in the prior art, which helps to improve the ability to prevent the grinding wheel from falling off and flying out under the action of grinding force, thereby improving the safety of the grinding wheel.

[0024] 7. The life of the grinding wheel is significantly increased and the cost of using the grinding wheel is greatly reduced by improving the cooling effect, fast chip removal and structural design of equal consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of the present invention;

[0026] Figure 2 for Figure 1 A three-dimensional image after removing a part;

[0027] Figure 3 for Figure 2 Ⅰ magnified image;

[0028] Figure 4 A top view of the present invention;

[0029] Figure 5 for Figure 4 AA section view;

[0030] Figure 6 for Figure 5 Ⅱ enlarged view;

[0031] Figure 7 A three-dimensional image after removing part of the support structure;

[0032] Figure 8 A three-dimensional diagram of a layer of spacers and gaskets after assembly;

[0033] Fig. 9 The schematic diagrams are of the side surfaces of two adjacent grinding discs being wavy and rectangular in shape respectively;

[0034] Fig.10 is a cross-sectional view of the second embodiment;

[0035] Fig.11 for Fig.10 Ⅲ enlarged view;

[0036] Fig.12 It is a three-dimensional diagram of Example 3;

[0037] Fig.13 for Fig.12 Ⅳ enlarged view;

[0038] Fig.14 for Fig.12 Assembly diagram of different layers of grinding discs.

[0039] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0040] 1. Base, 2. Grinding disc, 3. Water flow channel, 4. Pressure cover, 5. Drain groove, 6. Spacer, 7. Gasket, 8. Screw, 9. Water inlet, 10. Ring, 11. Block, 12. Slot. DETAILED DESCRIPTION

[0041] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0042] Embodiment 1

[0043] like Figure 1-6As shown, a ceramic bond peripheral grinding wheel is characterized in that it includes a base 1, a support structure, a pressure cover 4 and a plurality of grinding discs 2. The support structure is a vertically arranged cylindrical structure, and a plurality of water flow channels 3 are arranged on the side wall of the support structure in an axially spaced manner from top to bottom to connect the inside and outside of the support structure. The base 1 and the pressure cover 4 are both annular plate structures, and a through hole is arranged at the center of the base 1, and a ring 10 connecting the base 1 to the spindle of a machine tool is axially fixed at the position of the through hole. The support structure is on the base 1, and the pressure cover 4 covers the top of the support structure and fixes the support body on the base 1, and a water inlet 9 for injecting cold water into the inside of the support structure is arranged at the center of the pressure cover 4. A plurality of grinding discs 2 are bonded to the outer side wall of the support structure by ceramic bonding in the circumferential direction and spliced ​​to each other on the outside to form an annular grinding surface, and a drainage groove 5 connected to the water flow channel 3 is formed between two adjacent grinding discs 2.

[0044] like Figure 7 and 8 As shown, the support structure includes a plurality of spacers 6 and a plurality of gaskets 7. The spacer 6 is a circular ring structure, and all the spacers 6 are coaxially stacked up and down, and a plurality of gaskets 7 arranged in an annular spacer are arranged between each two adjacent spacers 6, so that the upper spacer 6 is suspended relative to the next spacer 6 and the water flow channel 3 is formed. The grinding disc 2 is bonded to the outer wall of the spacer 6 by ceramic bonding. A plurality of gaskets 7 arranged in an annular spacer are arranged between each two adjacent spacers 6 and close to the inner side. The support structure is a multi-layer spacer 6, and the spacer 6 is provided with a support point, i.e., a gasket 7, between the layers, and the water flow channel 3 is formed between the layers, which reduces the suspended area of ​​the grinding disc 2 while satisfying the bonding area of ​​the grinding disc 2 to ensure the bonding strength. The gasket 7 between the two adjacent spacers 6 is a layer, and the number of the gaskets 7 in each layer is equal, and the gaskets 7 in different layers are aligned up and down. The upper end of the screw 8 is located on the upper end surface of the pressure cover 4, and the lower end thereof passes through all the spacers 6 and the gaskets 7 aligned up and down and is connected to the corresponding position on the base 1, thereby fixing the positions of the spacers 6 and the gaskets 7 relative to the base 1.

[0045] Cold water is injected into the support structure from the water inlet 9. As the grinding wheel rotates, the cold water in the cavity of the support structure flows along the water flow channel 3 between the two adjacent layers of spacers 6 of the upper and lower supporting structure under the action of centrifugal force, and then is thrown outward to the grinding surface through the drainage groove 5 between the adjacent grinding discs 2, thereby cooling the grinding surface, and finally realizing the transformation of the grinding wheel around the ceramic binder from an external cooling mode to an internal cooling mode. In addition, the structural design of this grinding wheel does not require the equipment to have an internal cooling structure, thereby reducing the equipment investment cost. Since the water flow channel 3 and the drainage groove 5 are densely arranged, it is ensured that when the grinding wheel is working, there is cooling water supply in the grinding area at any moment, which improves the cooling effect, making it suitable for high-speed processing and conducive to a substantial improvement in grinding efficiency. By improving the cooling effect, rapid chip removal and structural design of equal consumption, the life of the grinding wheel is significantly improved, and the cost of using the grinding wheel is greatly reduced. In addition, the gaskets 7 between the layers of the spacers 6 of the supporting structure can form a spiral blade structure, which will form a suction force to draw the cooling water from the water inlet 9 as the grinding wheel rotates, which is beneficial for the cooling water injected into the cavity of the supporting structure from the water inlet 9 to flow from the inner diameter along the radial direction to the outer diameter through the action of centrifugal force, effectively increasing the cooling water flow rate per unit time, thereby improving the cooling effect.

[0046] The two sides of the grinding disc 2 are wavy, rectangular, toothed, parallelogram or curved. The sides of two adjacent grinding discs 2 can also adopt different shapes. As shown in 9, the sides of two adjacent grinding discs 2 are wavy and rectangular respectively, and when the sum of the arc lengths of all the grinding discs 2 corresponding to any circle on the grinding surface is equal, it can play a role in preventing deformation. There is a gap between the two adjacent grinding discs 2, and the gap forms the drainage groove 5. When the drainage groove 5 between the grinding discs 2 is designed as a wave-like structure, the two sides of the grinding disc 2 are wavy, and the design concept of equal shape consumption is adopted, so that the circumference of the effective working section of any circle on the grinding surface participating in the grinding process is equal, so that the grinding consumption of each circumference of the grinding surface is equal, which ensures that the shape of the grinding wheel remains unchanged during the grinding process, so that the processing accuracy and roughness of the surface of the grinding workpiece are effectively improved.

[0047] Embodiment 2

[0048] like Fig.10 and 11 As shown, the following improvements are made on the basis of the first embodiment: the outer edge of the spacer 6 penetrates into the corresponding position of the grinding disc 2 and bends downward to prevent the grinding disc 2 from falling off when subjected to grinding force. Through the above improvements, the connection method of the ceramic diamond grinding disc 2 and the spacer 6 of the supporting structure is based on the adhesive bonding method of the prior art, and a mechanical embedded meshing anti-flying structure is added, which helps to improve the ability to prevent the grinding disc 2 from falling off and flying out under the action of grinding force, and improves the safety of the grinding wheel.

[0049] Embodiment 3

[0050] like Figure 12-14 As shown, the following improvements are made on the basis of the first and second embodiments: the grinding disc 2 extends along the axial direction of the support structure, and the grinding disc 2 is integrally formed or is formed by a plurality of grinding disc monomers arranged up and down and connected to each other, specifically as follows: upper and lower layers of the grinding disc 2 are bonded to the side wall of the support structure along its axial direction, and the drainage groove 5 is formed between two grinding discs 2 adjacent to each other in the circumferential direction of the support structure, and two grinding discs 2 adjacent to each other in the axial direction of the support structure are clamped together. The ends of the two grinding discs 2 adjacent to each other in the axial direction of the support structure are provided with matching clamping blocks 11 or clamping grooves 12, which are clamped together by the clamping blocks 11 and the clamping grooves 12, which further help to improve the ability to prevent the grinding disc 2 from falling off and flying out under the action of grinding force. The above design can form a grinding wheel with a multi-layer grinding disc 2 structure to meet the use under different working conditions.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vitrified bond peripheral grinding wheel, characterized in that: The invention comprises a base (1), a support structure, a gland (4) and a plurality of grinding discs (2); the support structure is a vertically arranged cylindrical structure, and a plurality of water flow channels (3) are arranged on the side wall of the support structure at intervals in the axial direction so as to connect the inside and the outside of the support structure; the base (1) and the gland (4) are both annular plate-like structures, the support structure is located on the base (1), the gland (4) covers the top of the support structure and fixes the support structure on the base (1), and a water inlet (9) for injecting cold water into the support structure is arranged at the center of the gland (4); a plurality of grinding discs (2) are circumferentially bonded to the outer side wall of the support structure by ceramic bonding and are spliced ​​together on the outer side to form an annular grinding surface, and a drainage groove (5) connected to the water flow channel (3) is formed between two adjacent grinding discs (2); The support structure comprises a plurality of spacers (6) and a plurality of gaskets (7); the spacers (6) are of annular structures, all of the spacers (6) are coaxially stacked up and down, and a plurality of gaskets (7) arranged in an annular pattern are provided between each two adjacent spacers (6) up and down, so that the upper spacer (6) is suspended relative to the lower spacer (6) to form the water flow channel (3); the grinding disc (2) is bonded to the outer wall of the spacer (6) by ceramic bonding; The outer edge of the spacer (6) penetrates into the corresponding position of the grinding plate (2) and bends downward to prevent the grinding plate (2) from falling off when the grinding force is applied; A through hole is provided at the center of the base body (1), and a circular ring (10) is axially fixed at the position of the through hole for connecting the base body (1) to a machine tool spindle.

2. The vitrified bond peripheral grinding wheel according to claim 1, characterized in that: A plurality of gaskets (7) arranged in an annular pattern and spaced apart are provided between each two adjacent spacers (6) and close to the inner side.

3. The vitrified bond peripheral grinding wheel according to claim 1, characterized in that: The gasket (7) between two adjacent spacers (6) is a layer, the number of gaskets (7) in each layer is equal, and the gaskets (7) in different layers are aligned vertically.

4. The vitrified bond peripheral grinding wheel according to claim 3, characterized in that: It also includes a plurality of screws (8); the upper ends of the screws (8) are located on the upper end surface of the gland (4), and the lower ends of the screws (8) pass through all the spacers (6) and the gaskets (7) aligned up and down and are connected to corresponding positions on the base (1), thereby fixing the positions of the spacers (6) and the gaskets (7) relative to the base (1).

5. The vitrified bond peripheral grinding wheel according to claim 1, characterized in that: The grinding plate (2) extends along the axial direction of the supporting structure, and the grinding plate (2) is integrally formed or is formed by a plurality of grinding plate units arranged up and down and connected to each other.

6. The vitrified bond peripheral grinding wheel according to any one of claims 1 to 5, characterized in that: Both sides of the grinding disc (2) are wavy, rectangular, toothed or parallelogram shaped, and a gap is left between two adjacent grinding discs (2), the gap forming the drainage groove (5).

7. The vitrified bond peripheral grinding wheel according to claim 6, characterized in that: The total arc lengths of all the grinding plates (2) corresponding to any circle on the grinding surface are equal.

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