Preparation method for preparing diamond edge grinding wheel through infiltration method

Abstract

The invention discloses a novel method for preparing a metal-based corundum edge grinding wheel through an infiltration method. The method comprises the following steps that S1, titanium powder, aluminum powder and carbon powder are subjected to granulation treatment; s2, performing titanium plating treatment on the surface of the diamond; s3, uniformly mixing all the components by using a three-dimensional mixer; s4, the blank is subjected to infiltration sintering; s5, the sintered diamond tool bit is subjected to edge grinding, and a diamond edge grinding wheel is obtained after welding; and S6, edging and paint spraying treatment are conducted, and the finished edge grinding wheel is obtained. The service time of the diamond edge grinding wheel prepared through the infiltration method ranges from 120 h to 150 h. And the grinding cost and the polishing line energy consumption are greatly reduced, pollutant discharge is reduced, and considerable economic benefits and society can be brought.

Description

Technical Field

[0001] The invention relates to the field of diamond grinding tools for grinding and polishing stone polishing tiles, and in particular to a method for preparing a diamond edge grinding wheel by a melt infiltration method. Background Art

[0002] Edge grinding tools are used to size, regularize, smooth and chamfer the four sides of the tile. Edge grinding is the only final and most delicate process among all diamond tools for tile processing, so it places high demands on the performance of the edge grinding wheel. Poor performance of the edge grinding wheel will cause a large number of surface or angle defects, restricting the polishing line speed and processing quality.

[0003] For example, the Chinese patent with the existing publication number CN1923463A discloses a production process of a microcrystalline glass diamond grinding wheel. The key is that the diamond grinding wheel is composed of an aluminum matrix and a bronze binder, and the bronze binder is composed of two different components, a gold layer and a transition layer. The mass ratio of the gold layer binder is: Cu: 35-59%, Sn: 13-15%, Co: 15-35%, Ni: 3%, Ti: 3%, C: 1-6%, and the mass ratio of the transition layer is: Cu: 80-84%, Sn: 13-15%, Ni: 3-5%, and the diamond abrasive adopts MBD8 and MBD10 or models with similar strength and hardness, with a particle size of 140 / 170 or 170 / 200 mesh and a concentration of 50%-75%.

[0004] Another example is the Chinese patent with the existing publication number CN115922580A, which discloses a diamond grinding wheel for tiles and its formula. The grinding wheel includes a cutter head, a connecting piece and a base member, the cutter head and the base member are connected by the connecting piece, the cutter head includes at least two working layers and at least one non-working layer, the non-working layer is arranged between the two working layers, and the cutter head is provided with a plurality of noise reduction holes along the axial direction, and the noise reduction holes are filled with silencers.

[0005] The above patents have some advantages respectively, but they and the diamond grinding wheels currently on the market are hot-pressed sintered iron-based diamond grinding wheels, and their service life is relatively short, generally only 80-100 hours, which can be improved. Summary of the invention

[0006] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a method for preparing a diamond grinding wheel by melt infiltration to solve the problems mentioned in the background technology.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A method for preparing a diamond edge grinding wheel by melt infiltration method comprises the following steps: S1, granulation of titanium powder, aluminum powder and carbon powder; S2, diamond surface titanium plating treatment; S3, mixing the components evenly with a three-dimensional mixer; S4, performing infiltration sintering on the above blank; S5, grinding and welding the sintered diamond tool head to obtain a diamond grinding wheel; S6. Then it is sharpened and painted to get the finished product.

[0008] Preferably, the skeleton material of the cutter head of the diamond grinding wheel adopts a metal matrix, and the mass ratio of each component is as follows: 18-22 parts of tungsten powder, 20-30 parts of cobalt powder, 25-35 parts of iron powder, 4-6 parts of nickel powder, 10-15 parts of titanium powder, 2-3 parts of aluminum powder, 1-2 parts of carbon powder, and 8-10 parts of diamond.

[0009] Preferably, during the infiltration sintering of S4, the infiltration bronze powder used is CuSn10 bronze powder.

[0010] Preferably, the particle size of the tungsten powder is ≤200 mesh.

[0011] Preferably, the copper powder has a particle size of ≤200 mesh.

[0012] Preferably, the particle size of the iron powder is ≤2000 mesh.

[0013] Preferably, the particle size of the nickel powder is ≤200 mesh.

[0014] Preferably, the particle size of the titanium powder is ≤200 mesh.

[0015] Preferably, the particle size of the aluminum powder is ≤1000 mesh; and the particle size of the carbon powder is ≤1000 mesh.

[0016] Preferably, the diamond is required to have regular crystal shape, be raw material, and have TTI ≥ 70; and the CuSn10 particle size is ≤ 50 mesh.

[0017] In summary, the present invention mainly has the following beneficial effects: The diamond grinding wheel prepared by the melt infiltration method adopted in the present invention has a service life of 120h-150h, greatly reduces grinding costs and polishing line energy consumption, reduces pollutant emissions, and can bring considerable economic and social benefits. Implementation

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] A method for preparing a diamond edge grinding wheel by melt infiltration method comprises the following steps: S1, granulation of titanium powder, aluminum powder and carbon powder; S2, diamond surface titanium plating treatment; S3, mixing the components evenly with a three-dimensional mixer; S4, performing infiltration sintering on the above blank; S5, grinding and welding the sintered diamond tool head to obtain a diamond grinding wheel; S6. Then it is sharpened and painted to get the finished product.

[0020] Among them, the blade skeleton material of the diamond grinding wheel adopts a metal matrix, and the mass ratio of each component is as follows: 18-22 parts of tungsten powder, 20-30 parts of cobalt powder, 25-35 parts of iron powder, 4-6 parts of nickel powder, 10-15 parts of titanium powder, 2-3 parts of aluminum powder, 1-2 parts of carbon powder, and 8-10 parts of diamond.

[0021] Wherein, during the infiltration sintering of S4, the infiltration bronze powder used is CuSn10 bronze powder.

[0022] Wherein, the particle size of the tungsten powder is ≤200 mesh.

[0023] Wherein, the copper powder particle size is ≤200 mesh.

[0024] Wherein, the particle size of the iron powder is ≤2000 mesh.

[0025] Wherein, the particle size of the nickel powder is ≤200 mesh.

[0026] Wherein, the particle size of the titanium powder is ≤200 mesh.

[0027] Wherein, the particle size of the aluminum powder is ≤1000 mesh; the particle size of the carbon powder is ≤1000 mesh.

[0028] The diamond is required to have a regular crystal shape, be a raw material, and have a TTI ≥ 70; and the CuSn10 particle size is ≤ 50 mesh.

[0029] The diamond grinding wheel prepared by the melt infiltration method used in this embodiment has a service life of 120h-150h. The grinding cost and energy consumption of the polishing line are greatly reduced, and pollutant emissions are reduced, which can bring considerable economic and social benefits. Example

[0030] 1. Granulation of titanium powder, aluminum powder and carbon powder Take 10 to 15 parts by weight of titanium powder, 2 to 3 parts by weight of aluminum powder and 1 to 2 parts by weight of activated carbon powder, ball mill for 1 to 2 hours, and then granulate in a granulator.

[0031] 2. Diamond surface titanium coating treatment Take 8-10 parts by weight of 40# / 50# diamond, add 10-20 parts by weight of hydrochloric acid, let stand for 1-2 hours, filter, vacuum dry, and then perform titanium plating in a vacuum titanium plating machine.

[0032] 3. Mix the components evenly with a three-dimensional mixer Take 18 to 22 parts by weight of tungsten powder, 20 to 30 parts by weight of cobalt powder, 25 to 35 parts by weight of iron powder, 4 to 6 parts by weight of nickel powder, and the above-mentioned granulated titanium aluminum carbon powder and titanium-plated diamond, and mix them in a three-dimensional mixer for 3 to 4 hours to obtain a diamond grinding wheel cutter skeleton material blank.

[0033] 4. Infiltration sintering Take 100-110 parts by weight of the mixed edging wheel blade skeleton material blank, put it into a graphite mold, take 20-30 parts by weight of CuSn10 powder, put it on the skeleton material blank, and then put it into a bell furnace for vacuum sintering at a sintering temperature of 1000-1050°C, a sintering time of 45-60 minutes, and a pressure of 3KN. After cooling, take it out.

[0034] 5. Cutting edge grinding, welding and sharpening The sintered diamond cutter head is edge-grinded and welded to obtain a diamond edge-grinding wheel, which is then sharpened and painted to obtain a diamond edge-grinding wheel. Example

[0035] This case is a diamond front grinding wheel, which is made of powder with the following mass content: Tungsten powder 25 parts Cobalt powder 20 parts Nickel powder 5 parts 30 portions of iron powder 12 parts titanium powder 2 parts aluminum powder 1 piece of toner 40 / 45 Diamond 8 parts CuSn10 22 parts (1) Granulation of titanium powder, aluminum powder and carbon powder; (2) Titanium coating on diamond surface; (3) Mixing the components in a three-dimensional mixer for 3-4 hours; (4) Infiltration sintering of the above blanks, placing them in a bell furnace for vacuum sintering, sintering temperature 1000-1050°C, sintering time 45-60 minutes, pressure 3KN. (5) Grinding and welding the sintered diamond blade to obtain a diamond grinding wheel, and then sharpening and painting. Example

[0036] This case is a diamond back grinding wheel, which is made of powder with the following mass content: Tungsten powder 25 parts Cobalt powder 20 parts Nickel powder 5 parts 30 portions of iron powder 12 parts titanium powder 2 parts aluminum powder Toner 1 piece 70 / 80 Diamond 8 parts CuSn10 30 parts (1) Granulation of titanium powder, aluminum powder and carbon powder; (2) Titanium coating on diamond surface; (3) Mixing the components in a three-dimensional mixer for 3-4 hours; (4) Infiltration sintering of the above blanks, placing them in a bell furnace for vacuum sintering, sintering temperature 1000-1050°C, sintering time 45-60 minutes, pressure 3KN. (5) Grinding and welding the sintered diamond blade to obtain a diamond grinding wheel, and then sharpening and painting. Comprehensive analysis of Example 1, Example 2, Example 3 and Example 4 shows that the present invention has the following advantages: 1. After infiltration, bronze powder not only fills the skeleton material, but also significantly improves the density, strength and hardness of the skeleton material, thereby improving the grinding efficiency and service life of the diamond grinding wheel.

[0037] 2. The infiltration temperature is 1000-1050℃. The titanium-plated diamond is used to treat the regular crystal diamond, which can promote the chemical bonding between the diamond surface and titanium, improve the holding force of the metal matrix on the diamond, and further improve the sharpness and service life of the diamond grinding wheel.

[0038] 3. After granulation treatment, titanium powder, aluminum powder and carbon powder undergo a high-temperature self-propagating reaction at 1000-1050°C to form intermetallic compounds dispersed in the metal matrix. The strength and toughness of the matrix are improved through dispersion strengthening, which significantly improves the use efficiency of the diamond grinding wheel.

[0039] 4. Ordinary diamond grinding wheels are hot-pressed and sintered, and their service life is relatively short, generally only 80-100 hours. The diamond grinding wheels prepared by the melt infiltration method adopted in the present invention have a service life of 120h-150h. It can significantly reduce the grinding cost and energy consumption of the polishing line, reduce pollutant emissions, and bring considerable economic and social benefits. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a diamond grinding wheel by melt infiltration, characterized in that: The following steps are involved: S1, granulation of titanium powder, aluminum powder and carbon powder; S2, diamond surface titanium plating treatment; S3, mixing the components evenly with a three-dimensional mixer; S4, performing infiltration sintering on the above blank; S5, grinding and welding the sintered diamond tool head to obtain a diamond grinding wheel; S6. Then it is sharpened and painted to get the finished product.

2. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 1, characterized in that: The skeleton material of the diamond grinding wheel is made of a metal matrix, and the mass ratios of the components are as follows: 18 to 22 parts of tungsten powder, 20 to 30 parts of cobalt powder, 25 to 35 parts of iron powder, 4 to 6 parts of nickel powder, 10 to 15 parts of titanium powder, 2 to 3 parts of aluminum powder, 1 to 2 parts of carbon powder, and 8 to 10 parts of diamond.

3. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 1, characterized in that: When the S4 is infiltrated and sintered, the infiltrated bronze powder used is CuSn10 bronze powder.

4. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 2, characterized in that: The particle size of the tungsten powder is ≤200 mesh.

5. The method for preparing a diamond edge grinding wheel by melt infiltration method according to claim 2, characterized in that: The copper powder particle size is ≤200 mesh.

6. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 2, characterized in that: The particle size of the iron powder is ≤2000 mesh.

7. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 2, characterized in that: The particle size of the nickel powder is ≤200 mesh.

8. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 2, characterized in that: The particle size of the titanium powder is ≤200 mesh.

9. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 2, characterized in that: The particle size of the aluminum powder is ≤1000 mesh; the particle size of the carbon powder is ≤1000 mesh.

10. The method for preparing a diamond edge grinding wheel by melt infiltration according to claim 3, characterized in that: The diamond is required to have a regular crystal shape, be a raw material, and have a TTI ≥ 70; the CuSn10 particle size is ≤ 50 mesh.