Multi-node ceramic diamond composite grinding wheel

Abstract

The utility model relates to a multi-node ceramic diamond composite grinding wheel which comprises a base disc, an elastic layer, a heat dissipation layer and a grinding layer, the elastic layer, the heat dissipation layer and the grinding layer are sequentially compounded above the base disc from bottom to top, the heat dissipation layer is made of heat conduction metal materials, and the diameter of a center hole of the heat dissipation layer is larger than that of a center hole of the base disc. A plurality of drainage openings are formed in the outer edge wall of the heat dissipation layer around a center hole of the heat dissipation layer in an annular array mode, and flow guide holes which extend in the radial direction of the heat dissipation layer and are communicated with the center hole of the heat dissipation layer are formed in the inner wall of each drainage opening. In the high-speed rotation process of the grinding wheel, flowing airflow can be formed in the heat dissipation layer, heat in the heat dissipation layer can be carried and discharged, effective heat dissipation of the heat dissipation layer is achieved, it is guaranteed that the overall temperature of the grinding wheel is not too high, the grinding wheel is prevented from being damaged due to high temperature, and the service life of the grinding wheel is effectively guaranteed; and the method is suitable for a dry grinding use scene.

Description

Technical Field

[0001] The utility model relates to the technical field of composite grinding wheels, in particular to a multi-node ceramic diamond composite grinding wheel. Background Art

[0002] The existing multi-node ceramic diamond composite grinding wheel includes a base plate and a number of node units. During processing, the node units need to be evenly distributed on the base plate, and a resin binder is injected between the node units and the grinding wheel, then pressed, cooled, and sintered to form the grinding wheel. The multi-node ceramic diamond composite grinding wheel uses node units for grinding. The node units are made of ceramic diamond and have good grinding performance, and are commonly used for parts with high requirements such as aircraft brake pads.

[0003] Serious heat is generated during grinding and accumulates on the grinding wheel. The heat dissipation effect of the existing multi-node ceramic diamond composite grinding wheel is not ideal. Generally, the multi-node ceramic diamond composite grinding wheel can only be used under the condition of supplying coolant. If it is used in dry grinding processing, the grinding wheel is severely heated and easily damaged, thereby shortening the service life of the grinding wheel. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multi-node ceramic diamond composite grinding wheel with good heat dissipation effect, effectively solving the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions.

[0006] A multi-node ceramic diamond composite grinding wheel includes a base plate, an elastic layer, a heat dissipation layer, and a grinding layer. The elastic layer, the heat dissipation layer, and the grinding layer are sequentially laminated above the base plate from bottom to top. The heat dissipation layer is made of a heat-conducting metal material. The diameter of the central hole of the heat dissipation layer is larger than the diameter of the central hole of the base plate. A number of drainage ports are arranged in a circular array around the central hole of the heat dissipation layer on the outer edge wall of the heat dissipation layer. A diversion hole extending along the radial direction of the heat dissipation layer and communicating with the central hole of the heat dissipation layer is provided on the inner wall of each drainage port.

[0007] It can be seen that during the rotation of the grinding wheel, the air flow is forced into the drainage ports, is pressure-diverted to the diversion holes through the inner walls of the drainage ports, and flows into the gap between the inner wall of the central hole of the heat dissipation layer and the outer wall of the shaft rod through the diversion holes, and is finally discharged, forming a flowing air flow, which can carry the heat in the heat dissipation layer and discharge it, realizing effective heat dissipation of the heat dissipation layer, thereby ensuring that the overall temperature of the grinding wheel will not be too high, avoiding damage to the grinding wheel due to high temperature, effectively ensuring the service life of the grinding wheel, and being applicable to the use scenario of dry grinding.

[0008] Furthermore, a number of positioning blocks are annularly arrayed on the surface of the base plate around its central hole, and a number of bayonets are annularly arrayed on the heat dissipation layer around its central hole. The bayonets and the diversion holes are distributed at intervals and offset. The positioning blocks are correspondingly and respectively clamped and installed in the bayonets.

[0009] Furthermore, an annular member is fixed on the surface of the base plate around its central hole. Each positioning block adjacent to the central hole of the base plate is fixed to the outer edge wall of the annular member. A heat dissipation cavity with an opening facing away from the base plate is formed between two adjacent positioning blocks, the outer edge wall of the annular member, and the central hole wall of the heat dissipation layer. Each heat dissipation cavity communicates with each diversion hole in one-to-one correspondence.

[0010] Furthermore, the polishing layer, the heat dissipation layer, the elastic layer, and the base plate are respectively bonded and fixed into one body through an adhesive layer. The adhesive layer is a polyimide composite material composed of polyimide resin, fiber, and filler.

[0011] Furthermore, the polishing layer includes a number of polishing nodes evenly distributed on the heat dissipation layer. Each polishing node is composed of a large node fixed on the heat dissipation layer and a small node embedded in the large node. The large node is a mixture of diamond and silicon carbide, and the small node is diamond particles.

[0012] Furthermore, the base plate is made of alumina or silicon nitride material.

[0013] Furthermore, the elastic layer is a high-temperature resistant rubber layer.

[0014] Furthermore, the heat dissipation layer is made of metallic copper.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows.

[0016] 1. During the high-speed rotation of the grinding wheel provided by the present utility model, the air flow is forced into the drainage port, pressured and drained to the diversion hole through the inner wall of the drainage port, and flows into the gap between the inner wall of the central hole of the heat dissipation layer and the outer wall of the shaft rod through the diversion hole, and is finally discharged, forming a flowing air flow, which can carry the heat in the heat dissipation layer and discharge it, realizing effective heat dissipation of the heat dissipation layer, thereby ensuring that the overall temperature of the grinding wheel will not be too high, avoiding damage to the grinding wheel due to high temperature, effectively ensuring the service life of the grinding wheel, and thus being applicable to the use scenario of dry grinding.

[0017] 2. By adding an elastic layer between the heat dissipation layer and the base plate, the present utility model makes the contact between the heat dissipation layer and the polishing layer and the base plate a soft contact, playing a buffering role, thereby effectively improving the problems of high hardness and large brittleness of the node unit, making the polishing layer not easily damaged, and further increasing the service life of the grinding wheel.

[0018] 3. When assembling the present utility model, align the positioning blocks with the bayonets one by one, and then press-fit the heat dissipation layer. Each positioning block is fitted into the bayonet. On the one hand, the cooperation between the bayonet and the positioning block can provide a positioning effect for the press-fitting of the heat dissipation layer, ensuring the coaxial distribution of the heat dissipation layer and the base plate. On the other hand, using the supporting effect of the positioning block and the inner wall of the bayonet can improve the connection strength between the heat dissipation layer and the base plate, thereby ensuring the overall firmness of the grinding wheel, achieving two goals with one action.

[0019] 4. The airflow flowing into the diversion holes of the present utility model will finally flow into the heat dissipation cavity formed between the positioning block, the annular part and the inner wall of the central hole of the heat dissipation layer, and is discharged to the outside through the opening of the heat dissipation cavity, thereby forming multiple independent channels for the airflow in each diversion hole to be independently discharged, avoiding the interference and turbulence of the airflow in each diversion hole when entering the central hole of the heat dissipation layer and affecting the heat dissipation effect. Description of the Drawings

[0020] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is a partial structural schematic diagram of the outer surface of the connecting sleeve seat in the present utility model;

[0022] Figure 3 is a detailed structural schematic diagram of the annular clamping part in the present utility model;

[0023] Figure 4 is an installation schematic diagram of the retaining ring structure in the present utility model;

[0024] Figure 5 is a sectional structural schematic diagram of the present utility model.

[0025] In the figure: 1, base plate; 2, elastic layer; 3, heat dissipation layer; 31, drainage port; 32, diversion hole; 33, bayonet; 34, positioning block; 35, annular part; 36, heat dissipation cavity; 4, grinding layer; 41, grinding node; 411, large node; 412, small node; 5, adhesive layer. Detailed Embodiment

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct communication or an indirect communication through an intermediate medium. Among them, "fixing" means that they are connected to each other and the relative position relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only with reference to the direction of the attached drawings. Therefore, the orientation terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present utility model.

[0028] In the embodiments of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0029] Please refer to Figures 1 - 5 , a multi-node ceramic diamond composite grinding wheel provided by the present utility model includes a base plate 1, an elastic layer 2, a heat dissipation layer 3, and a grinding layer 4. The elastic layer 2, the heat dissipation layer 3, and the grinding layer 4 are sequentially compounded above the base plate 1 from bottom to top. The heat dissipation layer 3 is made of a heat-conducting metal material. A plurality of drainage ports 31 are arranged in a circular array around the central hole of the outer edge wall of the heat dissipation layer 3. The cross-section of the drainage port 31 is in a sharp angle shape. A diversion hole 32 extending radially along the heat dissipation layer 3 and communicating with the central hole of the heat dissipation layer 3 is provided on the inner wall of each drainage port 31. The diameter of the central hole of the heat dissipation layer 3 is larger than the diameter of the central hole of the base plate 1. Since the shaft rod matches the size of the central hole of the base plate 1, it is ensured that there is a gap for heat dissipation between the inner wall of the central hole of the heat dissipation layer 3 and the outer wall of the shaft rod after the shaft rod is inserted.

[0030] When the multi-node ceramic diamond composite grinding wheel provided by the utility model is in the grinding operation, the grinding wheel rotates at a high speed, and the workpiece is ground by the grinding layer 4. The heat generated by the friction between the grinding layer 4 and the workpiece can be effectively absorbed by the heat dissipation layer 3 made of heat-conducting metal material. Then the heat will finally accumulate on the heat dissipation layer 3. At the same time, during the rotation of the grinding wheel, the air flow is forced into the drainage port 31, and is drained to the diversion hole 32 by the pressing of the inner wall of the drainage port 31, and flows into the gap between the inner wall of the central hole of the heat dissipation layer 3 and the outer wall of the shaft rod through the diversion hole 32, and is finally discharged, forming a flowing air flow, which can carry the heat in the heat dissipation layer 3 and discharge it, realizing effective heat dissipation of the heat dissipation layer 3, and then ensuring that the overall temperature of the grinding wheel will not be too high, avoiding damage to the grinding wheel due to high temperature, and effectively ensuring the service life of the grinding wheel.

[0031] In addition, by adding an elastic layer 2 between the heat dissipation layer 3 and the base plate 1, the contact between the heat dissipation layer 3 and the grinding layer 4 and the base plate 1 is a soft contact, which plays a buffering role. Furthermore, it can effectively improve the problems of high hardness and brittleness of the node unit, making the grinding layer 4 not easy to be damaged, and further increasing the service life of the grinding wheel.

[0032] Specifically, a number of positioning blocks 34 are annularly arrayed around the central hole on the surface of the base plate 1, and a number of bayonets 33 are annularly arrayed around the central hole on the heat dissipation layer 3. The bayonets 33 and the diversion holes 32 are spaced and misaligned. The positioning blocks 34 are respectively and correspondingly fitted and installed in the bayonets 33. During assembly, the positioning blocks 34 are aligned with the bayonets 33 one by one, and then the heat dissipation layer 3 is press-fitted. Each positioning block 34 is fitted and clamped into the bayonet 33. On the one hand, the cooperation between the bayonet 33 and the positioning block 34 can provide a positioning effect for the press-fitting of the heat dissipation layer 3, ensuring the coaxial distribution of the heat dissipation layer 3 and the base plate 1. On the other hand, using the supporting effect of the positioning block 34 on the inner wall of the bayonet 33, the connection strength between the heat dissipation layer 3 and the base plate 1 can be improved, and then the overall firmness of the grinding wheel can be ensured, achieving two goals with one action.

[0033] Specifically, a ring-shaped member 35 is fixed on the surface of the base plate 1 around its central hole. Each positioning block 34 near the central hole of the base plate 1 is fixed to the outer edge wall of the ring-shaped member 35. A heat dissipation cavity 36 with an opening facing away from the base plate 1 is formed between adjacent two positioning blocks 34, the outer edge wall of the ring-shaped member 35 and the inner wall of the central hole of the heat dissipation layer 3. Each heat dissipation cavity 36 communicates with each diversion hole 32 in a one-to-one correspondence. The air flow flowing into the diversion hole 32 will finally flow into the heat dissipation cavity 36 formed between the positioning block 34, the ring-shaped member 35 and the inner wall of the central hole of the heat dissipation layer 3, and is discharged to the outside through the opening of the heat dissipation cavity 36. Then multiple independent channels are formed for the air flow in each diversion hole 32 to be independently discharged, avoiding the interference of the air flow in each diversion hole 32 with each other in the central hole of the heat dissipation layer 3 and generating turbulence, which affects the heat dissipation effect.

[0034] Specifically, the polishing layer 4, the heat dissipation layer 3, the elastic layer 2, and the base plate 1 are respectively bonded and fixed into one body through the adhesive layer 5. The adhesive layer 5 is a polyimide composite material composed of polyimide resin, fiber, and filler. Using the polyimide composite material for bonding and fixing is more firm. Since the polyimide composite material is not easily softened after being exposed to high temperature, instead, a carbonized layer is formed, thereby ensuring reliable bonding and not easily falling off.

[0035] Specifically, the polishing layer 4 includes a number of polishing nodes 41 evenly distributed on the heat dissipation layer 3. Each polishing node 41 is composed of a large node 411 fixed on the heat dissipation layer 3 and a small node 412 embedded in the large node 411. During assembly, the large node 411 and the small node 412 are pre-pressed and mixed to form the polishing layer 4, and then it is bonded and fixed on the heat dissipation layer 3.

[0036] The large node 411 is a mixture of diamond and silicon carbide, and the small node 412 is diamond particles. During the grinding process, the small node 412 made of diamond particles ensures that the overall grinding wheel is sharper and has better grinding performance.

[0037] Specifically, the base plate 1 is made of alumina or silicon nitride material, so that the base plate 1 has good hardness and wear resistance and can work stably under high temperature and high pressure.

[0038] Specifically, the elastic layer 2 is a high-temperature resistant rubber layer and can still maintain stable elasticity in a high-temperature environment.

[0039] Specifically, the heat dissipation layer 3 is made of metallic copper, which has good heat conduction effect and high hardness.

[0040] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A multi-node ceramic diamond composite grinding wheel, characterized in that: It includes a base plate (1), an elastic layer (2), a heat dissipation layer (3) and a grinding layer (4); The elastic layer (2), the heat dissipation layer (3) and the grinding layer (4) are sequentially compounded above the base plate (1) from bottom to top; The heat dissipation layer (3) is made of a heat-conducting metal material; The diameter of the central hole of the heat dissipation layer (3) is larger than the diameter of the central hole of the base plate (1); A number of drainage ports (31) are arranged in a circular array around the central hole on the outer edge wall of the heat dissipation layer (3), and a diversion hole (32) extending radially along the heat dissipation layer (3) and communicating with the central hole of the heat dissipation layer (3) is provided on the inner wall of each drainage port (31).

2. The multi-node ceramic diamond composite grinding wheel according to claim 1, characterized in that: A number of positioning blocks (34) are arranged in a circular array around the central hole on the surface of the base plate (1), and a number of bayonets (33) are arranged in a circular array around the central hole on the heat dissipation layer (3); The bayonets (33) and the diversion holes (32) are spaced and misaligned; The positioning blocks (34) are respectively and correspondingly clamped and installed in the bayonets (33).

3. The multi-node ceramic diamond composite grinding wheel according to claim 2, characterized in that: A ring part (35) is fixed around the central hole on the surface of the base plate (1), and the outer edge walls of the positioning blocks (34) adjacent to the central hole of the base plate (1) are fixed to the outer edge wall of the ring part (35); A heat dissipation cavity (36) with an opening facing away from the base plate (1) is formed between two adjacent positioning blocks (34), the outer edge wall of the ring part (35) and the central hole wall of the heat dissipation layer (3), and each heat dissipation cavity (36) communicates with each diversion hole (32) in a one-to-one correspondence.

4. The multi-node ceramic diamond composite grinding wheel according to claim 1, characterized in that: The grinding layer (4), the heat dissipation layer (3), the elastic layer (2) and the base plate (1) are respectively bonded and fixed into one body through an adhesive layer (5); The adhesive layer (5) is a polyimide composite material composed of a mixture of polyimide resin, fibers and fillers.

5. The multi-node ceramic diamond composite grinding wheel according to claim 1, characterized in that: The grinding layer (4) includes a number of grinding nodes (41) evenly distributed on the heat dissipation layer (3); Each grinding node (41) is composed of a large node (411) fixed on the heat dissipation layer (3) and a small node (412) embedded in the large node (411); The large node (411) is a mixture of diamond and silicon carbide, and the small node (412) is a diamond particle.

6. The multi-node ceramic diamond composite grinding wheel according to claim 1, characterized in that: The base plate (1) is made of alumina or silicon nitride material.

7. The multi-node ceramic diamond composite grinding wheel according to claim 1, characterized in that: The elastic layer (2) is a high-temperature resistant rubber layer.

8. A multi-node ceramic diamond composite grinding wheel according to claim 1, characterized in that: The heat dissipation layer (3) is made of metallic copper.

Images