Composite abrasive belt with a network of reinforcing elements

Abstract

The utility model discloses a kind of composite abrasive belt of net-shaped reinforcing matrix, it includes abrasive belt body, and abrasive belt body includes;Net matrix layer, it is carbon fiber woven net impregnated with ceramic whisker, one side is formed as plane, and the other side is formed as concave surface;Hard tensile layer, it is polyaryletherketone fiber woven belt, top surface heat press is fixed on the plane of net matrix layer, to form composite layer in this way;Hard abrasive layer, it is single-layer diamond abrasive, it is sprayed on the concave surface of net matrix layer, the vertical surface of net matrix layer and the vertical surface of hard tensile layer;Carbon fiber itself has very high strength and modulus, the filling of ceramic whisker further enhances the rigidity, heat resistance and wear resistance of matrix, polyaryletherketone fiber woven belt provides tensile strength, toughness and high-temperature resistance, and this composite structure makes abrasive belt body have very high overall tensile strength, is superior to traditional non-woven fabric, paper-based or film-based matrix, effectively solve the problem that traditional abrasive belt is easy to deform, tear.

Description

Technical Field

[0001] This utility model relates to the field of abrasive belt technology, specifically a composite abrasive belt with a mesh-reinforced matrix. Background Technology

[0002] As a high-efficiency grinding tool, abrasive belts are widely used in precision machining operations on the surfaces of metals, composite materials, and other materials.

[0003] Traditional sanding belts mainly use non-woven fabric, paper base or polymer film as reinforcement matrix, which has defects such as low tensile strength, poor heat resistance, and easy deformation and tearing. In addition, the grinding layer of traditional sanding belts is uniform in thickness. However, due to grinding habits, operators usually prioritize grinding the workpiece in the center area of ​​the sanding belt. This will make the wear degree of the middle area of ​​the sanding belt higher than that of the side areas. Over time, the middle area of ​​the sanding belt will be severely worn and will eventually reach the condition of needing to be replaced.

[0004] Therefore, in order to avoid the problem that traditional sanding belts are not strong enough and are prone to breakage, and that the frequent replacement of sanding belts is caused by the fact that most operators prefer to wear out the middle area of ​​the sanding belt, we have made technical improvements to the existing sanding belts to meet the needs of use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a composite abrasive belt with a mesh-reinforced matrix that has high tensile strength, more stable grinding operation, and a central area that is more wear-resistant than the two side areas.

[0006] The technical problem to be solved by this utility model is achieved through the following technical solution: a composite abrasive belt with a mesh-reinforced matrix, comprising an abrasive belt body, wherein the outer peripheral surface of the abrasive belt body forms a grinding surface for grinding operations, and the inner peripheral surface of the abrasive belt body forms a transmission surface for contacting the power roller of the grinding mechanism, wherein the abrasive belt body comprises;

[0007] The mesh matrix layer is a carbon fiber woven mesh impregnated with ceramic whiskers. The side of the carbon fiber woven mesh facing the inner peripheral surface of the sand belt body is formed as a plane, and the side of the carbon fiber woven mesh away from the inner peripheral surface of the sand belt body is formed as a concave surface.

[0008] The rigid tensile layer is a polyaryletherketone fiber woven tape, the top surface of which is hot-pressed and fixed on the plane of the mesh matrix layer to form a composite layer with the mesh matrix layer.

[0009] The hard abrasive layer, which is a single layer of diamond abrasive, is sprayed onto the concave surface of the mesh matrix layer, the vertical surface of the mesh matrix layer, and the vertical surface of the hard tensile layer.

[0010] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the composite abrasive belt with a mesh-reinforced matrix described above has a planar hard abrasive layer on the concave surface of the mesh matrix layer.

[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the composite abrasive belt with a mesh-reinforced matrix described above, wherein the thickness of the mesh matrix layer is 0.9mm~1.5mm, the mesh density of the carbon fiber woven mesh is 80 mesh~120 mesh, and the volume filling rate of the ceramic whiskers is 30%~50%.

[0012] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the composite abrasive belt with a mesh-reinforced matrix described above has a hard tensile layer with a thickness of 1.2mm to 1.8mm, and the warp density of the polyaryletherketone fiber woven belt is 50 to 70 fibers / cm, and the weft density is 30 to 50 fibers / cm.

[0013] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the composite abrasive belt with a mesh-reinforced matrix described above, wherein the total thickness of the hard tensile layer and the mesh matrix layer after hot pressing is 2.1mm~3mm, and the shear strength of the composite interface is ≥15MPa.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the composite abrasive belt with a mesh-reinforced matrix described above, wherein the particle size of the single-layer diamond abrasive is 80μm~150μm and the abrasive coverage density is 1000 particles / cm²~1500 particles / cm².

[0015] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the composite abrasive belt with a mesh-reinforced matrix described above has a total thickness of 4.8mm to 7.2mm.

[0016] Compared with the prior art, the beneficial technical effects of this utility model are:

[0017] (1) This composite abrasive belt uses carbon fiber woven mesh impregnated with ceramic whiskers as the mesh matrix layer, and combines it with polyaryletherketone fiber woven belt fixed by hot pressing on the top surface, thereby forming a composite layer structure with better tensile and wear resistance. The carbon fiber itself has extremely high strength and modulus, and the filling of ceramic whiskers further enhances the rigidity, heat resistance and wear resistance of the matrix. The polyaryletherketone fiber woven belt provides tensile strength, toughness and high temperature resistance. This composite structure makes the abrasive belt body have extremely high overall tensile strength, which is better than traditional non-woven fabric, paper base or film matrix. It effectively solves the problem of easy deformation and tearing of traditional abrasive belts, and significantly improves heat resistance. It enables the abrasive belt to maintain excellent dimensional stability and smooth operation in high-speed and high-load grinding operations, greatly reduces the risk of breakage, and improves the safety and reliability of grinding operations.

[0018] (2) The side of the mesh matrix layer away from the transmission surface is concave. A single layer of diamond abrasive is sprayed onto this concave surface, vertical surface, and the vertical surface of the hard tensile layer to form a hard abrasive layer. This design makes the abrasive layer actually thicker in the central area of ​​the abrasive belt's grinding surface, i.e., the deepest part of the concave surface of the matrix layer. Even with the same spray density, the concave area can hold a larger amount of abrasive. Combined with the three-dimensional support structure provided by the mesh matrix layer, the abrasive can be more firmly embedded and wrapped in the mesh structure. This structure is specifically designed to address the issue of operators prioritizing the use of the central area of ​​the abrasive belt, giving the central area a higher abrasive reserve and stronger structural support, thereby significantly improving the wear resistance life of the central area of ​​the abrasive belt. Compared with traditional abrasive belts of uniform thickness, this effectively alleviates the problem of premature wear and failure in the central area, making the overall wear of the abrasive belt more uniform, greatly extending the service life of the abrasive belt, reducing the frequency of replacement due to excessive local wear, and lowering the cost of use. Attached Figure Description

[0019] Figure 1 This is a partial top view of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the removed section at point AA of this utility model;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of a portion of the structure.

[0022] Reference numerals: 1. Sanding belt body; 101. Grinding surface; 102. Transmission surface;

[0023] 2. Reticulated matrix layer; 201. Planar surface; 202. Concave surface;

[0024] 3. Rigid tensile layer;

[0025] 4. Hard abrasive layer. Detailed Implementation

[0026] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0027] Example 1, referring to Figure 1-3 A composite abrasive belt with a mesh-reinforced matrix includes an abrasive belt body 1. The total thickness of the abrasive belt body 1 is 4.8mm to 7.2mm, and the specific thickness can be selected according to the usage requirements. The outer peripheral surface of the abrasive belt body 1 forms a grinding surface 101 for grinding operations, and the inner peripheral surface of the abrasive belt body 1 forms a transmission surface 102 for contacting the power roller of the grinding mechanism. The transmission surface 102 is convenient to be fitted onto the outer roller body. The abrasive belt body 1 includes:

[0028] The mesh matrix layer 2 is a carbon fiber woven mesh impregnated with ceramic whiskers. The side of the carbon fiber woven mesh facing the inner circumferential surface of the abrasive belt body 1 is formed as a plane 201, and the side of the carbon fiber woven mesh away from the inner circumferential surface of the abrasive belt body 1 is formed as a concave surface 202. The curvature of the concave surface 202 can be selected according to the usage requirements. The thickness of the mesh matrix layer 2 is 0.9mm~1.5mm, and its thickness value can be selected according to the usage requirements. The mesh density of the carbon fiber woven mesh is 80 mesh~120 mesh, and its mesh number can be selected according to the usage requirements. The volume filling rate of the ceramic whiskers is 30%~50%, and its volume filling rate can be selected according to the usage requirements.

[0029] The rigid tensile layer 3 is a polyaryletherketone fiber woven tape, the top surface of which is hot-pressed and fixed onto the plane 201 of the mesh matrix layer 2 to form a composite layer with the mesh matrix layer 2. The thickness of the rigid tensile layer 3 is 1.2mm~1.8mm, and its thickness can be selected according to the usage requirements. The warp density of the polyaryletherketone fiber woven tape is 50 threads / cm~70 threads / cm, and the weft density is 30 threads / cm~50 threads / cm. The radial and weft densities of the polyaryletherketone fiber woven tape can be selected according to the user's usage requirements. The total thickness of the rigid tensile layer 3 and the mesh matrix layer 2 after hot pressing is 2.1mm~3mm, and its thickness value can be selected according to the usage requirements. The shear strength of the composite interface is ≥15MPa.

[0030] The hard abrasive layer 4 is a single layer of diamond abrasive with a particle size of 80μm~150μm, which can be selected according to the usage requirements. The abrasive coverage density is 1000 particles / cm²~1500 particles / cm², which can be selected according to the user's processing requirements. It is sprayed on the concave surface 202 of the mesh substrate layer 2, the vertical surface of the mesh substrate layer 2, and the vertical surface of the hard tensile layer 3. The hard abrasive layer 4 on the concave surface 202 of the mesh substrate layer 2 is a plane 201. That is to say, one side of the hard abrasive layer 4 on the concave surface 202 of the mesh substrate layer 2 is a convex surface that fits against the concave surface 202, while the other side is a plane 201.

[0031] The specific manufacturing process of the composite abrasive belt with a mesh-reinforced matrix in Example 1 is as follows:

[0032] (1) Preparation of mesh matrix layer 2: First, 80-120 mesh carbon fiber woven mesh is selected as the substrate. The carbon fiber woven mesh is immersed in a suspension slurry containing ceramic whiskers. The immersion time, pressure and slurry concentration can be carefully selected according to the application requirements to ensure that the ceramic whiskers fully fill the mesh and achieve the target volume filling rate of 30%-50%. Then, the woven mesh after immersion is placed in an oven for preliminary drying to remove most of the solvent. Next, it is placed in a high-temperature curing oven for heat curing treatment to make the ceramic whiskers and carbon fiber network firmly bonded to form a prepreg blank. Finally, this prepreg blank is placed for hot pressing to make one side of the carbon fiber woven mesh flat 201 and the other side form the required concave surface 202 contour. After hot pressing, it is cooled and demolded to obtain the mesh matrix layer 2.

[0033] (2) Hard tensile layer 3 composite: Select polyaryletherketone fiber braided tape with a warp density of 50 threads / cm to 70 threads / cm and a weft density of 30 threads / cm to 50 threads / cm as the material of hard tensile layer 3, and clean and plasma activate its surface to enhance the adhesion. Then, flatly cover the treated polyaryletherketone fiber braided tape on the pre-formed plane 201 of the mesh matrix layer 2. Send this laminated structure into a flat hot press for hot pressing composite to obtain a composite layer with a total thickness of 2.1mm to 3mm, which is tightly bonded to the mesh matrix layer 2 and the hard tensile layer 3.

[0034] (3) Spraying and curing of hard abrasive layer 4: Single crystal diamond abrasive with a particle size range of 80μm~150μm is sprayed onto the concave surface 202, vertical surface and hard tensile layer 3 of the composite layer at a coverage density of 1000 particles / cm²~1500 particles / cm². At the same time as sandblasting, heat-resistant resin binder is sprayed to make the abrasive particles wrapped by the binder and initially positioned, and to make the abrasive layer at the concave surface 202 form a grinding plane 201. After the abrasive and binder are sprayed, the abrasive belt is sent into the curing oven for curing treatment to make the binder fully cross-linked and cured, and to firmly anchor the diamond abrasive on the substrate surface and in the mesh structure to form a hard and wear-resistant grinding layer. After curing, the abrasive belt is trimmed to ensure that the edges are neat. The total thickness of the abrasive belt is accurately measured to be 4.8mm~7.2mm, and a composite abrasive belt with mesh-reinforced substrate can be obtained.

Claims

1. A composite abrasive belt with a mesh-reinforced matrix, characterized in that: It includes an abrasive belt body, the outer peripheral surface of which forms a grinding surface for abrasive operation, and the inner peripheral surface of which forms a transmission surface for contacting the power roller of the abrasive mechanism. The abrasive belt body includes: The mesh matrix layer is a carbon fiber woven mesh impregnated with ceramic whiskers. The side of the carbon fiber woven mesh facing the inner peripheral surface of the sand belt body is formed as a plane, and the side of the carbon fiber woven mesh away from the inner peripheral surface of the sand belt body is formed as a concave surface. The rigid tensile layer is a polyaryletherketone fiber woven tape, the top surface of which is hot-pressed and fixed on the plane of the mesh matrix layer to form a composite layer with the mesh matrix layer. The hard abrasive layer, which is a single layer of diamond abrasive, is sprayed onto the concave surface of the mesh matrix layer, the vertical surface of the mesh matrix layer, and the vertical surface of the hard tensile layer.

2. The composite abrasive belt with a mesh-reinforced matrix according to claim 1, characterized in that: The hard abrasive layer located on the concave surface of the mesh matrix layer is planar.

3. The composite abrasive belt with a mesh-reinforced matrix according to claim 1, characterized in that: The thickness of the mesh matrix layer is 0.9mm to 1.5mm, wherein the mesh density of the carbon fiber woven mesh is 80 mesh to 120 mesh, and the volume filling rate of the ceramic whiskers is 30% to 50%.

4. The composite abrasive belt with a mesh-reinforced matrix according to claim 1, characterized in that: The thickness of the rigid tensile layer is 1.2mm to 1.8mm, and the warp density of the polyaryletherketone fiber braided tape is 50 to 70 fibers / cm, and the weft density is 30 to 50 fibers / cm.

5. The composite abrasive belt with a mesh-reinforced matrix according to claim 1, characterized in that: The total thickness of the rigid tensile layer and the mesh matrix layer after hot pressing is 2.1mm~3mm, and the shear strength of the composite interface is ≥15MPa.

6. The composite abrasive belt with a mesh-reinforced matrix according to claim 1, characterized in that: The single-layer diamond abrasive has a particle size of 80μm~150μm and an abrasive coverage density of 1000 particles / cm²~1500 particles / cm².

7. The composite abrasive belt with a mesh-reinforced matrix according to claim 1, characterized in that: The total thickness of the abrasive belt body is 4.8mm to 7.2mm.

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