Preparation method of superhard abrasive particle tool and superhard abrasive particle tool

Abstract

The invention discloses a preparation method of a superhard abrasive particle tool and the superhard abrasive particle tool, and belongs to the technical field of abrasive grinding tools, and the preparation method comprises the following steps: S1, brushing first glue on the surface of a brazing alloy sheet, scattering superhard abrasive particles on the first glue, enabling the superhard abrasive particles to be adhered to the brazing alloy sheet, and removing the superhard abrasive particles which are not adhered to obtain a first semi-finished product; s2, braze welding alloy powder is scattered on the surface of the first semi-finished product, the braze welding alloy powder is scattered on the first glue between a braze welding alloy sheet and the super-hard abrasive particles, redundant braze welding alloy powder is removed, then drying and curing are conducted, the super-hard abrasive particles are fully fixed, and a second semi-finished product is obtained; s3, the brazing alloy sheet of the second semi-finished product is attached to the surface of the base body, and a third semi-finished product is obtained; and S4, the third semi-finished product is subjected to brazing preparation, and a tool finished product is obtained. According to the method, the brazed superhard abrasive particles are stably connected to the base body, and the method has the advantages of being low in preparation cost, simple in overall process and high in production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of abrasive tools, and particularly to a preparation method of a superhard abrasive tool and a superhard abrasive tool. Background Art

[0002] In the manufacturing of superhard abrasive tools, the ordered arrangement technology of abrasive grains realizes the regular distribution of abrasive grains on the tool surface through specific process means. Compared with the traditional random distribution, the ordered arrangement can significantly reduce the temperature in the machining area, improve the chip removal performance, thereby enhancing the tool life, machining efficiency and workpiece surface quality, while reducing the amount of abrasive grains used and lowering the production cost.

[0003] Currently, the ordered arrangement technologies of brazed superhard abrasive tools mainly include the template method, the dispensing method, the negative pressure method, the magnetic attraction method, the laser rapid prototyping technology, etc. Among them, as the mainstream process, the template method is mainly divided into the following two implementation methods:

[0004] External template method: A template with positioning holes is temporarily fixed on the surface of the substrate. After filling superhard abrasive grains through the positioning holes, the abrasive grains are solidified by brazing, electroplating or sintering processes, and finally the template is removed to obtain the finished product.

[0005] Substrate template method: Positioning holes or grooves are directly machined on the surface of the substrate as a template. After positioning the abrasive grains, it is formed by welding or sintering processes, omitting the template removal step, but the machining complexity of the substrate is relatively high.

[0006] However, the existing template method has significant defects: Whether using an external template or a substrate template, the whole process from abrasive grain arrangement to forming depends on the physical support of the template. This limitation leads to complex processes, high costs, and it is difficult to improve the arrangement efficiency and production rhythm, restricting large-scale industrial applications. Summary of the Invention

[0007] The purpose of the present invention is to provide a preparation method of a superhard abrasive tool and a superhard abrasive tool to solve the above problems existing in the prior art. During the preparation process, the superhard abrasive grains are fixed on the brazing alloy sheet by using the first glue, and through the combination of the brazing alloy powder and the brazing alloy sheet, the superhard abrasive grains are stably connected to the substrate after brazing, having the advantages of low preparation cost, simple overall process and high production efficiency.

[0008] To achieve the above purpose, the present invention provides the following solutions:

[0009] The present invention provides a preparation method of a superhard abrasive tool, including the following steps:

[0010] S1. Apply the first glue on the surface of the brazing alloy sheet, sprinkle superhard abrasive grains on the first glue, so that the superhard abrasive grains adhere to the brazing alloy sheet, and remove the unadhered superhard abrasive grains to obtain the first semi-finished product;

[0011] S2. Sprinkle brazing alloy powder on the surface of the first semi-finished product, sprinkle the brazing alloy powder on the first glue between the brazing alloy sheet and the superhard abrasive grains, remove the excess brazing alloy powder, and then carry out drying and curing to fix the superhard abrasive grains to obtain the second semi-finished product;

[0012] S3. Bond the brazing alloy sheet of the second semi-finished product to the surface of the substrate to obtain the third semi-finished product;

[0013] S4. Carry out brazing preparation on the third semi-finished product to obtain the finished tool.

[0014] In one embodiment, a template is further included. In step S1, place the template on the first glue, sprinkle superhard abrasive grains above the template, and bond the superhard abrasive grains to the brazing alloy sheet according to the positioning arrangement of the template, and then remove the template.

[0015] In one embodiment, the template is made of stainless steel, and a plurality of through holes are distributed on the template, and the diameter of the through holes is not less than the particle size of a single superhard abrasive grain.

[0016] In one embodiment, the diameter of the through hole is greater than the maximum particle size of the superhard abrasive grain and less than twice the minimum particle size of the superhard abrasive grain, the thickness of the template is not less than the maximum diameter of the superhard abrasive grain, the thickness of the template is 0.2 mm to 1.2 mm, and the diameter of the through hole is 0.15 mm to 1.5 mm.

[0017] In one embodiment, in step S3, apply the second glue at the required position on the surface of the substrate, bond the second semi-finished product to the surface of the substrate, and then carry out drying and curing to make the second semi-finished product fully fixed to the surface of the substrate.

[0018] In one embodiment, the first glue uses a pressure-sensitive adhesive, and the second glue uses a polyurethane glue.

[0019] In one embodiment, the composition of the brazing alloy sheet is the same as that of the brazing alloy powder, and both are one of silver-based alloy, copper-based alloy, and nickel-based alloy, and the thickness of the brazing alloy sheet is 0.1 mm to 0.7 mm.

[0020] In one embodiment, the superhard abrasive grains are one or a mixture of two or more of natural diamond, synthetic diamond, cubic boron nitride, polycrystalline diamond, polycrystalline cubic boron nitride, cemented carbide, silicon carbide, and aluminum oxide, and the particle size range of the superhard abrasive grains is 0.1 mm to 1.0 mm.

[0021] In one embodiment, in step S2, when drying and curing, the first semi-finished product sprinkled with brazing alloy powder is placed in an oven and kept at 50°C to 60°C for 20 min to 30 min; in step S3, when drying and curing, the substrate bonded with the second semi-finished product is kept in the oven at 80°C to 100°C for 40 min to 60 min.

[0022] The present invention provides a superhard abrasive grain tool, which is prepared by the preparation method described above, and includes a substrate and superhard abrasive grains connected to the surface of the substrate, and the surface of the substrate is a plane, a curved surface or a special-shaped surface.

[0023] The present invention has achieved the following technical effects compared with the prior art:

[0024] The present invention uses the first glue to bond the superhard abrasive grains on the brazing alloy sheet, and then distributes the brazing alloy powder around the superhard abrasive grains by sprinkling the brazing alloy powder. By using the combination of the brazing alloy powder and the brazing alloy sheet, the tool finished product is obtained after brazing, so that the superhard abrasive grains are stably connected to the substrate after brazing, which can improve the connection strength and stability between the superhard abrasive grains and the substrate, and has the advantages of low preparation cost, simple overall process and high production efficiency.

[0025] Other technical solutions included in the present invention can also achieve the following technical effects:

[0026] Through the application of the template, the present invention can limit the position of the superhard abrasive grains through the template to ensure the orderly distribution of the superhard abrasive grains on the brazing alloy sheet. The template can be removed after the superhard abrasive grains are bonded with the first glue. Therefore, the template does not need to participate in the whole process during the preparation of the superhard abrasive grain tool, especially there is no template during the brazing process, and the template does not need to be consumed.

[0027] The brazing alloy sheet of the present invention has good flexibility. By bonding the brazing alloy sheet with superhard abrasive grains to the surfaces of substrates with different shapes, the orderly arrangement of the superhard abrasive grains on a plane, a curved surface or a special-shaped surface can be realized, and it has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic diagram of the cloth process in the embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the substrate bonding and brazing process in the embodiment of the present invention;

[0031] Figure 3 Schematic diagram of the brazed planar tool structure in the embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the brazed curved surface tool structure in the embodiment of the present invention;

[0033] Among them, 1. Brazing alloy sheet; 2. First glue; 3. Template; 4. Superhard abrasive grains; 5. Powder glue mixture; 6. Substrate; 7. Second glue; 8. Brazing alloy. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] The object of the present invention is to provide a preparation method of a superhard abrasive tool and a superhard abrasive tool to solve the problems existing in the prior art. During the preparation process, the position of the superhard abrasive grains is fixed by using the first glue, which has the advantages of low preparation cost, simple overall process and high production efficiency.

[0036] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0037] As Figures 1 to 4 shown, the present invention provides a preparation method of a superhard abrasive tool, including the following steps:

[0038] S1. Apply the first glue 2 on the surface of the brazing alloy sheet 1, and sprinkle superhard abrasive grains 4 on the first glue 2. The first glue 2 has an adhesive effect, enabling the superhard abrasive grains 4 to adhere to the brazing alloy sheet 1. When sprinkling the superhard abrasive grains 4, a template 3 can be used for positioning, or the distribution density and arrangement area of the superhard abrasive grains 4 can be controlled and adjusted by controlling the sprinkling range or amount. If there are unadhered superhard abrasive grains 4, they can be removed by vibrating or flipping the brazing alloy sheet 1 (such as inverting it as a whole and shaking it off), obtaining the brazing alloy sheet 1 adhered with superhard abrasive grains 4, that is, the first semi-finished product.

[0039] S2. Sprinkle brazing alloy powder on the surface of the first semi-finished product, and sprinkle the brazing alloy powder on the first glue 2 between the brazing alloy sheet 1 and the superhard abrasive grains 4. After the brazing alloy powder adheres to the first glue 2, a powder-glue mixture 5 is obtained. The powder-glue mixture 5 is located around the superhard abrasive grains 4, providing alloy materials for subsequent brazing connection to ensure the firm connection of the superhard abrasive grains 4. Then, remove (such as by blowing with compressed air or adsorbing with a vacuum device) the excess unadhered brazing alloy powder, and then perform drying and curing to fully fix the superhard abrasive grains 4. At this time, the brazing alloy sheet 1 is adhered with both superhard abrasive grains 4 and the powder-glue mixture 5, thus obtaining the brazing alloy sheet 1 with superhard abrasive grains 4 and the powder-glue mixture 5, that is, the second semi-finished product.

[0040] S3. Attach the brazing alloy sheet 1 of the second semi-finished product to the surface of the substrate 6, and use the second glue 7 for connection and fixation or other mechanical clamping methods for fixation, obtaining the substrate 6 connected with the second semi-finished product, that is, the third semi-finished product.

[0041] S4. Perform brazing preparation on the third semi-finished product. The control parameters required for the brazing process can be selected according to the composition of the brazing alloy sheet 1 and the brazing alloy powder used. After brazing, the superhard abrasive grains 4 are connected to the substrate 6, obtaining the finished tool. According to the surface shape of the substrate 6, it can be divided into brazed flat tools, brazed curved tools, etc.

[0042] The present invention uses the first glue 2 to adhere the superhard abrasive grains 4 on the brazing alloy sheet 1, and then by sprinkling brazing alloy powder, distributes the brazing alloy powder around the superhard abrasive grains 4. Using the combination of the brazing alloy powder and the brazing alloy sheet 1, after brazing, the finished tool is obtained, enabling the superhard abrasive grains 4 to be stably connected to the substrate 6 after brazing, which can improve the connection strength and stability between the superhard abrasive grains 4 and the substrate 6, and has the advantages of low preparation cost, simple overall process, and high production efficiency.

[0043] In one embodiment, during brazing, place the third semi-finished product in a vacuum brazing furnace with a vacuum degree ≤ 1×10 - 3Under the condition of MPa, heat preservation is carried out at 930 °C to 960 °C for 10 to 20 minutes, and brazing is carried out in a vacuum brazing furnace for preparation.

[0044] In one embodiment, it further includes a template 3. In step S1, the template 3 is placed on the first glue 2, and the position of the superhard abrasive grains 4 is limited by the template 3. The superhard abrasive grains 4 are scattered above the template 3, and the superhard abrasive grains 4 are arranged on the brazing alloy sheet 1 according to the positioning arrangement of the template 3, and are bonded and fixed by the first glue 2. After the superhard abrasive grains 4 are bonded, the excess unbonded superhard abrasive grains 4 are removed, and then the template 3 is removed. In this process, only the template 3 is used as a limiting structure to limit the superhard abrasive grains 4, and the superhard abrasive grains 4 are bonded and fixed by the first glue 2. Therefore, the template 3 can be reused directly or after removing the first glue 2, reducing the loss of the template 3, reducing the impact on the production rhythm due to waiting for the template 3, and improving the production efficiency.

[0045] Through the application of the template 3 in the present invention, the position of the superhard abrasive grains 4 can be limited by the template 3 to ensure the orderly distribution of the superhard abrasive grains 4 on the brazing alloy sheet 1. After the superhard abrasive grains 4 are bonded to the first glue 2, the template 3 can be removed. Therefore, in the process of preparing the superhard abrasive tool, the template 3 does not need to participate in the whole process, especially in the brazing process, the template 3 is not carried, and the template 3 does not need to be consumed.

[0046] In one embodiment, the template 3 is made of stainless steel, such as 304 stainless steel, which has appropriate hardness and corrosion resistance, a smooth surface, and can be reused. A plurality of through holes are distributed on the template 3, and the distribution method (parameters such as density, spacing, and uniformity) of the through holes is reasonably set according to the characteristics of the required superhard abrasive tool. The diameter of the through holes is not less than the particle size of a single superhard abrasive grain 4, so that the superhard abrasive grains 4 can pass through the through holes and be bonded to the brazing alloy sheet 1.

[0047] In one embodiment, the diameter of the through hole is larger than the maximum particle size of the superhard abrasive grains 4 and smaller than twice the minimum particle size of the superhard abrasive grains 4. At this time, only a single superhard abrasive grain 4 can pass through the through hole. Thus, under the limitation of the through hole, the superhard abrasive grains 4 can be arranged on the brazing alloy sheet 1 in an orderly manner according to the set distribution method. The thickness of the template 3 is not less than the maximum diameter of the superhard abrasive grains 4, so that the superhard abrasive grains 4 can completely enter the through hole, avoiding the problem of poor bonding caused by the superhard abrasive grains 4 not being able to completely enter the through hole. In this example, the thickness of the template 3 is 0.2 mm to 1.2 mm, and the diameter of the through hole is 0.15 mm to 1.5 mm.

[0048] In one embodiment, in step S3, the second glue 7 is applied to the required position on the surface of the substrate 6, and the second semi-finished product is adhered to the surface of the substrate 6 by using the second glue 7. It should be noted that when the second semi-finished product is adhered, it should be the surface of the brazing alloy sheet 1 where the superhard abrasive grains 4 are not adhered. After the second semi-finished product is adhered to the substrate 6, it is dried and cured, so that the brazing alloy sheet 1 of the second semi-finished product is fully fixed to the surface of the substrate 6, ensuring that there is no displacement during the brazing process, and finally ensuring that the obtained tool finished product meets the requirements.

[0049] In one embodiment, the first glue 2 and the second glue 7 can be the same glue or different glues. In this example, the first glue 2 is a pressure-sensitive adhesive, such as acrylate pressure-sensitive adhesive, natural rubber pressure-sensitive adhesive, synthetic rubber pressure-sensitive adhesive, thermoplastic elastomer pressure-sensitive adhesive, polyurethane pressure-sensitive adhesive, etc. The pressure-sensitive adhesive has the characteristics of no residual glue after peeling and relatively low initial tackiness, which can reduce the cleaning requirements for the template 3. After the template 3 is removed, there is no or little residual glue on the surface of the template 3, and it can be reused directly or after simple cleaning. The second glue 7 is a polyurethane glue.

[0050] In one embodiment, the composition of the brazing alloy sheet 1 is the same as that of the brazing alloy powder, and both are one of silver-based alloy, copper-based alloy, and nickel-based alloy. The brazing alloy powder plays a role in holding the superhard abrasive grains 4 from falling off and shifting during the brazing process. At the same time, using the brazing alloy powder with the same composition as the brazing alloy sheet 1 facilitates the fusion of the brazing alloy powder and the brazing alloy sheet 1 during subsequent brazing, thus ensuring performance consistency. The thickness of the brazing alloy sheet 1 can be determined according to the shape of the surface of the substrate 6 to be adhered and the particle size of the superhard abrasive grains 4 used. In this example, the thickness of the brazing alloy sheet 1 is 0.1 mm to 0.7 mm.

[0051] In one embodiment, the superhard abrasive grains 4 are one or a mixture of two or more of natural diamond, artificial diamond, cubic boron nitride, polycrystalline diamond, polycrystalline cubic boron nitride, cemented carbide, silicon carbide, and aluminum oxide. In this example, the particle size range of the superhard abrasive grains 4 is 0.1 mm to 1.0 mm.

[0052] In one embodiment, in step S2, when drying and curing, the first semi-finished product sprinkled with brazing alloy powder is placed in an oven and kept at 50°C to 60°C for 20 min to 30 min; in step S3, when drying and curing, the substrate 6 with the second semi-finished product adhered is placed in an oven and kept at 80°C to 100°C for 40 min to 60 min.

[0053] Such as Figures 1 to 4As shown in the figure, the present invention provides a superhard abrasive tool, which is prepared by the preparation method described above, and includes a substrate 6 and superhard abrasive grains 4. The superhard abrasive grains 4 are connected to the substrate 6 through a brazing alloy 8. The surface of the substrate 6 is a plane, a curved surface or a special-shaped surface, meeting the usage requirements for different working conditions. As Figure 3 Shown is a schematic structural diagram of a brazed planar tool, which is a structure formed by bonding a third semi-finished product on a planar substrate 6 and forming a structure in which the brazing alloy 8 connects the superhard abrasive grains 4 and the substrate 6 after brazing to obtain a finished brazed planar tool. As Figure 4 Shown is a schematic structural diagram of a brazed curved surface tool, which is a structure formed by bonding a third semi-finished product on a curved surface substrate 6 and forming a structure in which the brazing alloy 8 connects the superhard abrasive grains 4 and the substrate 6 after brazing to obtain a finished brazed curved surface tool.

[0054] According to the foregoing superhard abrasive tool and the preparation method of the superhard abrasive tool, the present invention provides the following application examples:

[0055] Example 1

[0056] Take diamond single crystals with a particle size of 250 μm to 300 μm as the superhard abrasive grains 4, perform ultrasonic treatment in alcohol, and dry them for later use after the treatment ends;

[0057] Take 1 brazing alloy sheet 1 with a thickness of 0.2 mm and a material of Cu-Sn-Ti, apply pressure-sensitive adhesive on the surface of the brazing alloy sheet 1, place the template 3 on the pressure-sensitive adhesive, sprinkle diamond single crystals above the template 3, then invert the whole, shake off the unbonded diamond single crystals, and then remove the template 3 to obtain a first semi-finished product. Sprinkle Cu-Sn-Ti brazing alloy powder on the surface of the brazing alloy sheet 1 of the first semi-finished product, sprinkle the Cu-Sn-Ti brazing alloy powder on the pressure-sensitive adhesive between the brazing alloy sheet 1 and the diamond single crystals to form a powder-adhesive mixture 5, and blow away the excess Cu-Sn-Ti brazing alloy powder to obtain a first semi-finished product with a powder-adhesive mixture 5. Then place the first semi-finished product with a powder-adhesive mixture 5 in an oven and keep it at 60 °C for 20 min to dry and cure, so that the diamond single crystals are fully fixed to obtain a second semi-finished product with the powder laid.

[0058] Take a planar 45 steel substrate 6, perform ultrasonic treatment on the substrate 6 with acetone, and after it dries, apply polyurethane glue on the surface of the substrate 6, lay and bond the brazing alloy sheet 1 of the second semi-finished product on the surface of the substrate 6, and then place it in an oven and keep it at 80 °C for 60 min for curing, so that the brazing alloy sheet 1 of the second semi-finished product is fully fixed to the surface of the substrate 6 to obtain a third semi-finished product.

[0059] Place the third semi-finished product in a vacuum brazing furnace with a vacuum degree ≤ 1×10 -3Brazing was carried out under the condition of Figure 3 MPa and at 940 °C for 15 min, and finally cooled in the furnace. The single crystal diamond was connected to the substrate 6 by forming the brazing alloy 8 to obtain the finished brazed planar tool as

[0060] Example 2

[0061] Single crystal diamond with a particle size of 250 μm to 300 μm was taken as the superhard abrasive grain 4 and ultrasonically treated in alcohol. After the treatment, it was dried for later use;

[0062] One brazing alloy sheet 1 with a thickness of 0.15 mm and a material of Cu-Sn-Ti was taken. Pressure-sensitive adhesive was applied on the surface of the brazing alloy sheet 1. The template 3 was placed on the pressure-sensitive adhesive, and single crystal diamond was scattered above the template 3. Then the whole was inverted, and the unbonded single crystal diamond was shaken off. Then the template 3 was removed to obtain the first semi-finished product. Cu-Sn-Ti brazing alloy powder was scattered on the surface of the brazing alloy sheet 1 of the first semi-finished product, and the Cu-Sn-Ti brazing alloy powder was scattered on the pressure-sensitive adhesive between the brazing alloy sheet 1 and the single crystal diamond to form a powder-adhesive mixture 5, and the excess Cu-Sn-Ti brazing alloy powder was blown away. The first semi-finished product with the powder-adhesive mixture 5 was placed in an oven and dried and cured at 60 °C for 20 min to fully fix the single crystal diamond, and the second semi-finished product with the cloth laid was obtained.

[0063] A circular 45 steel substrate 6 was taken, and the substrate 6 was ultrasonically treated with acetone. After it was dried, polyurethane glue was applied on the surface of the substrate 6. The brazing alloy sheet 1 of the second semi-finished product was bent and attached to the surface of the substrate 6, and then it was placed in an oven and cured at 100 °C for 40 min to fully fix the brazing alloy sheet 1 of the second semi-finished product to the surface of the substrate 6, and the third semi-finished product was obtained;

[0064] The third semi-finished product was placed in a vacuum brazing furnace, and brazing was carried out under the condition of a vacuum degree ≤ 1×10 -3 MPa and at 940 °C for 15 min, and finally cooled in the furnace. The single crystal diamond was connected to the substrate 6 by forming the brazing alloy 8 to obtain the finished brazed curved surface tool as Figure 4 shown.

[0065] In the present invention, specific examples are used to elaborate the principle and implementation manner of the present invention. The descriptions of the above examples are only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A method for preparing a superhard abrasive tool, characterized in that: The following steps are involved: S1, applying a first glue on the surface of the brazing alloy sheet, spreading superhard abrasive grains on the first glue, so that the superhard abrasive grains are bonded to the brazing alloy sheet, and removing the unbonded superhard abrasive grains to obtain a first semi-finished product; S2, spreading brazing alloy powder on the surface of the first semi-finished product, spreading the brazing alloy powder on the first glue between the brazing alloy sheet and the super-hard abrasive grains, removing excess brazing alloy powder, and drying and curing to fix the super-hard abrasive grains, thereby obtaining a second semi-finished product; S3, laminating the brazing alloy sheet of the second semi-finished product to the surface of the substrate to obtain a third semi-finished product; S4, brazing the third semi-finished product to obtain a finished tool.

2. The method for preparing a superhard abrasive tool according to claim 1, characterized in that: It also includes a template. In step S1, the template is placed on the first glue, super-hard abrasive grains are spread on the template, the super-hard abrasive grains are bonded to the brazing alloy sheet according to the positioning arrangement of the template, and then the template is removed.

3. The method for preparing a superhard abrasive tool according to claim 2, characterized in that: The template is made of stainless steel and is provided with a plurality of through holes. The diameter of the through holes is not less than the particle size of a single superhard abrasive grain.

4. The method for preparing a superhard abrasive tool according to claim 3, characterized in that: The diameter of the through hole is larger than the maximum particle size of the superhard abrasive and smaller than twice the minimum particle size of the superhard abrasive. The thickness of the template is not less than the maximum diameter of the superhard abrasive. The thickness of the template is 0.2mm to 1.2mm. The diameter of the through hole is 0.15mm to 1.5mm.

5. The method for preparing a superhard abrasive tool according to claim 2, characterized in that: In step S3, the second glue is applied to the desired position on the surface of the substrate, the second semi-finished product is bonded to the surface of the substrate, and then dried and cured, so that the second semi-finished product is fully fixed to the surface of the substrate.

6. The method for preparing a super-hard abrasive tool according to claim 5, characterized in that: The first glue is pressure-sensitive glue, and the second glue is polyurethane glue.

7. The method for preparing a super-hard abrasive tool according to claim 1, characterized in that: The composition of the brazing alloy sheet is consistent with that of the brazing alloy powder, both of which are one of silver-based alloy, copper-based alloy and nickel-based alloy. The thickness of the brazing alloy sheet is 0.1 mm to 0.7 mm.

8. The method for preparing a super-hard abrasive tool according to claim 1, characterized in that: The super-hard abrasive grains are one or a mixture of two or more of natural diamond, artificial diamond, cubic boron nitride, polycrystalline diamond, polycrystalline cubic boron nitride, cemented carbide, silicon carbide, and aluminum oxide. The particle size of the super-hard abrasive grains ranges from 0.1 mm to 1.0 mm.

9. The method for preparing a super-hard abrasive tool according to claim 1, characterized in that: In step S2, during drying and curing, the first semi-finished product sprinkled with brazing alloy powder is placed in an oven and kept warm at 50°C to 60°C for 20min to 30min; in step S3, during drying and curing, the substrate bonded with the second semi-finished product is kept warm in an oven at 80°C to 100°C for 40min to 60min.

10. A super-hard abrasive tool, characterized in that: The abrasive material is prepared by the preparation method according to any one of claims 1 to 9, and comprises a substrate and super-hard abrasive grains connected to the surface of the substrate, wherein the surface of the substrate is a plane, a curved surface or a special-shaped surface.

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