Preparation process of grinding oilstone

Abstract

The invention relates to the technical field of grinding tools, in particular to a preparation process of a grinding oilstone, silicon nitride and diamond are adopted as raw materials to prepare the grinding oilstone, the silicon nitride has high hardness, high wear resistance and good chemical stability, and the diamond as the hardest substance in the nature has extremely high cutting capacity and wear resistance; silicon nitride and diamond are effectively combined to prepare the composite grinding oilstone, the grinding efficiency of the oilstone can be remarkably improved, the service life of the oilstone can be remarkably prolonged, and compared with an existing mode, the performance during use is improved; meanwhile, by adopting one or at least two of an oil-based binder, a wax-based binder, an oil-wax-based binder and a polyaldehyde binder as the binder, the surface brightness, smoothness, strength and abrasion resistance of the grinding oilstone can be improved, and the problems that in the prior art, the grinding oilstone is poor in performance in actual use, and the grinding oilstone is prone to being damaged are solved in this way. And the surface brightness and smoothness of the oilstone are poor.

Description

Technical Field

[0001] The invention relates to the technical field of grinding tools, in particular to a preparation process of a grinding oilstone. Background Art

[0002] Grinding tools are a type of tool commonly used in mechanical processing, mainly used to grind the surface of workpieces to achieve the desired shape, size and surface roughness, and grinding oilstone is one of the grinding tools. Grinding oilstone, also known as grindstone or oil-immersed grinding wheel, is a tool used for grinding and polishing the surface of hard materials such as metal, ceramics, glass, etc. In the existing method, grinding oilstone is usually made by mixing abrasives and adhesives and then pressing them.

[0003] For example, a honing oilstone disclosed in the prior art patent application number CN201911035895.1 includes diamond abrasive, cubic boron nitride abrasive, silicon carbide, alloy powder, binder, curing agent, hollow alumina spheres, carboxylates and propylene glycol. The prepared honing oilstone has high grinding efficiency and strong self-sharpening performance.

[0004] However, the existing grinding oilstones have poor performance in actual use, and the surface brightness and smoothness of the oilstones are poor. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation process of a grinding oil stone, aiming to solve the technical problems that the grinding oil stone in the prior art has poor performance in actual use and poor surface brightness and smoothness of the oil stone.

[0006] To achieve the above object, the present invention adopts a preparation process of grinding oilstone, comprising the following steps:

[0007] 20-60 parts of silicon nitride powder with a purity of not less than 99.9%, 20-60 parts of diamond powder with a purity of not less than 99.5% and 4-10 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing;

[0008] In the process of mixing silicon nitride powder and diamond powder, 4-6 parts of binder, 6-12 parts of curing agent, 2-6 parts of rare earth oxide, 1-3 parts of metal phase and 2-5 parts of yttrium oxide are added into the mixing device in proportion and mixed again to obtain a mixture for use;

[0009] The mixture is molded to obtain an oilstone body;

[0010] The oilstone body is subjected to high temperature sintering;

[0011] The sintered oilstone can be post-processed to obtain grinding oilstone.

[0012] The specific method of molding the mixture to obtain the oilstone blank is: molding the mixture into an oilstone blank of a desired shape by pressing or injection molding.

[0013] The specific method of high-temperature sintering the oilstone blank is as follows:

[0014] The oilstone body is added into a high temperature sintering furnace for sintering, and during this process, the high temperature sintering should be performed under the protection of nitrogen or inert gas.

[0015] The post-processing method of the sintered oilstone is as follows: grinding and polishing the sintered oilstone, and performing surface coating treatment as needed.

[0016] In the process of mixing silicon nitride powder and diamond powder, 2-4 parts of nano material are added in proportion, and the nano material includes one of nano aluminum oxide and nano silicon carbide.

[0017] Wherein, in the process of mixing silicon nitride powder and diamond micropowder, 2-3 parts of rare earth element are added, and the rare earth element includes one of lanthanum and cerium.

[0018] Among them, the pretreatment methods for silicon nitride powder, diamond powder and silicon carbide include screening, cleaning and drying.

[0019] The binder added in the process of mixing silicon nitride powder and diamond powder includes one of a metal binder and a ceramic binder;

[0020] The metal binder is one or more of copper-tin pre-alloy powder, magnesium powder and silver powder;

[0021] The ceramic binder is one of boron glass powder and intercalated modified kaolin powder.

[0022] Wherein, the binder is one or at least two of an oil-based binder, a wax-based binder, an oil-and-wax-based binder and a polyaldehyde-based binder.

[0023] The present invention discloses a process for preparing a grinding oilstone. Silicon nitride powder with a purity of not less than 99.9% and diamond micropowder with a purity of not less than 99.5% are selected as raw materials to prepare the grinding oilstone. Silicon nitride has great application potential in the field of grinding tools due to its high hardness, high wear resistance and good chemical stability. Diamond, as the hardest substance in nature, has extremely high cutting ability and wear resistance. The present invention effectively combines silicon nitride with diamond to prepare a composite grinding oilstone, which can significantly improve the grinding efficiency and service life of the oilstone. Compared with the existing method, the performance during use is improved.

[0024] At the same time, by using one or at least two of oil-based binders, wax-based binders, oil-and-wax-based binders and polyaldehyde-based binders as binders, the surface brightness, smoothness, strength and wear resistance of the grinding oilstone can be improved. The added rare earth oxide can promote the refinement of grains during the sintering process, improve the density and strength of the material, and also help to improve the wear resistance and service life of the oilstone. The added metal phase can form a strong chemical bond with ceramic materials such as silicon nitride and diamond at high temperature, thereby improving the overall performance of the oilstone;

[0025] Secondly, the added yttrium oxide can promote the bonding between silicon nitride and diamond particles, improve the density and strength of the oilstone, and the added nanomaterials can enhance the bonding force and refine the grains, thereby solving the technical problems of the grinding oilstone in the prior art, which has poor performance in actual use and poor surface brightness and finish of the oilstone. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a flow chart of the steps of the preparation process of the grinding oil stone of the present invention. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0029] See also Figure 1 , Figure 1 It is a flow chart of the steps of the preparation process of the grinding oil stone of the present invention.

[0030] The present invention provides a preparation process of a grinding oilstone, comprising the following steps:

[0031] 20-60 parts of silicon nitride powder with a purity of not less than 99.9%, 20-60 parts of diamond powder with a purity of not less than 99.5% and 4-10 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing;

[0032] In the process of mixing silicon nitride powder and diamond micropowder, 4-6 parts of binder, 6-12 parts of curing agent, 2-6 parts of rare earth oxide, 1-3 parts of metal phase, 2-5 parts of yttrium oxide, 2-4 parts of nanomaterials, and 2-3 parts of rare earth elements are added to the mixing device in proportion and mixed again to obtain a mixture for use;

[0033] The mixture is molded into an oilstone body of a desired shape by pressing or injection molding;

[0034] The oilstone blank is added into a high-temperature sintering furnace for sintering, and during this process, the high-temperature sintering should be carried out under the protection of nitrogen or inert gas;

[0035] The sintered oilstone is ground and polished, and surface coated as needed to obtain a grinding oilstone.

[0036] Embodiment 1:

[0037] The present invention provides a preparation process of a grinding oilstone, comprising the following steps:

[0038] 20 parts of silicon nitride powder with a purity of not less than 99.9%, 45 parts of diamond powder with a purity of not less than 99.5% and 4 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing;

[0039] In the process of mixing silicon nitride powder and diamond micropowder, 4 parts of binder, 6 parts of curing agent, 2 parts of rare earth oxide, 1 part of metal phase, 2 parts of yttrium oxide, 2 parts of nanomaterials and 2 parts of rare earth elements are added into a mixing device in proportion and mixed again to obtain a mixture for use;

[0040] The mixture is molded into an oilstone body of a desired shape by pressing or injection molding;

[0041] The oilstone blank is added into a high-temperature sintering furnace for sintering, and during this process, the high-temperature sintering should be carried out under the protection of nitrogen or inert gas;

[0042] The sintered oilstone is ground and polished, and surface coated as needed to obtain a grinding oilstone.

[0043] By using a process for preparing a grinding oilstone according to the present embodiment, the ratio of silicon nitride powder to diamond powder is set to 1:2.5, so that the prepared grinding oilstone can have high cutting efficiency.

[0044] Embodiment 2:

[0045] The present invention provides a preparation process of a grinding oilstone, comprising the following steps:

[0046] 40 parts of silicon nitride powder with a purity of not less than 99.9%, 40 parts of diamond powder with a purity of not less than 99.5% and 7 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing;

[0047] In the process of mixing silicon nitride powder and diamond micropowder, 5 parts of binder, 9 parts of curing agent, 4 parts of rare earth oxide, 2 parts of metal phase, 3.5 parts of yttrium oxide, 3 parts of nanomaterial and 2.5 parts of rare earth element are added into the mixing device in proportion and mixed again to obtain a mixture for use;

[0048] The mixture is molded into an oilstone body of a desired shape by pressing or injection molding;

[0049] The oilstone blank is added into a high-temperature sintering furnace for sintering, and during this process, the high-temperature sintering should be carried out under the protection of nitrogen or inert gas;

[0050] The sintered oilstone is ground and polished, and surface coated as needed to obtain a grinding oilstone.

[0051] By using a process for preparing a grinding oil stone according to the present embodiment and setting the ratio of silicon nitride powder to diamond powder to 1:1, the prepared grinding oil stone can have better wear resistance.

[0052] Embodiment 3:

[0053] The present invention provides a preparation process of a grinding oilstone, comprising the following steps:

[0054] 40 parts of silicon nitride powder with a purity of not less than 99.9%, 40 parts of diamond powder with a purity of not less than 99.5% and 10 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing;

[0055] In the process of mixing silicon nitride powder and diamond micropowder, 6 parts of metal binder, 12 parts of curing agent, 6 parts of rare earth oxide, 3 parts of metal phase, 5 parts of yttrium oxide, 4 parts of nanomaterial and 3 parts of rare earth element are added into a mixing device in proportion and mixed again to obtain a mixture for use;

[0056] The mixture is molded into an oilstone body of a desired shape by pressing or injection molding;

[0057] The oilstone blank is added into a high-temperature sintering furnace for sintering, and during this process, the high-temperature sintering should be carried out under the protection of nitrogen or inert gas;

[0058] The sintered oilstone is ground and polished, and surface coated as needed to obtain a grinding oilstone.

[0059] By using a process for preparing a grinding oil stone according to the present embodiment, a metal binder is used as a binder for preparing the oil stone, so that the prepared grinding oil stone can be made to have a higher hardness and be more wear-resistant.

[0060] Embodiment 4:

[0061] The present invention provides a preparation process of a grinding oilstone, comprising the following steps:

[0062] 40 parts of silicon nitride powder with a purity of not less than 99.9%, 40 parts of diamond powder with a purity of not less than 99.5% and 10 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing;

[0063] In the process of mixing silicon nitride powder and diamond micropowder, 6 parts of ceramic binder, 12 parts of curing agent, 6 parts of rare earth oxide, 3 parts of metal phase, 5 parts of yttrium oxide, 4 parts of nanomaterial and 3 parts of rare earth element are added into the mixing device in proportion and mixed again to obtain a mixture for use;

[0064] The mixture is molded into an oilstone body of a desired shape by pressing or injection molding;

[0065] The oilstone blank is added into a high-temperature sintering furnace for sintering, and during this process, the high-temperature sintering should be carried out under the protection of nitrogen or inert gas;

[0066] The sintered oilstone is ground and polished, and surface coated as needed to obtain a grinding oilstone.

[0067] By using a process for preparing a grinding oilstone according to the present embodiment, a ceramic binder is used as a binder for preparing the oilstone, so that the prepared grinding oilstone can be made to have a higher hardness and be more wear-resistant.

[0068] Embodiment 5:

[0069] The present invention provides a preparation process of a grinding oilstone, comprising the following steps:

[0070] 40 parts of silicon nitride powder with a purity of not less than 99.9%, 40 parts of diamond powder with a purity of not less than 99.5% and 10 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing;

[0071] In the process of mixing silicon nitride powder and diamond micropowder, 6 parts of binder, 12 parts of curing agent, 6 parts of rare earth oxide, 3 parts of metal phase, 5 parts of yttrium oxide, 4 parts of nanomaterial and 3 parts of rare earth element are added into the mixing device in proportion and mixed again to obtain a mixture for use;

[0072] The mixture is molded into an oilstone body of a desired shape by pressing or injection molding;

[0073] The oilstone blank is added into a high-temperature sintering furnace for sintering, and during this process, the high-temperature sintering should be carried out under the protection of nitrogen or inert gas;

[0074] The sintered oilstone is ground and polished, and surface coated as needed to obtain a grinding oilstone.

[0075] Wherein, the binder is one or at least two of an oil-based binder, a wax-based binder, an oil-and-wax-based binder and a polyaldehyde-based binder.

[0076] By using a preparation process for a grinding oil stone according to the present embodiment, one or at least two of oil-based binders, wax-based binders, oil-wax-based binders and polyaldehyde-based binders are used as binders for preparing the oil stone, so that the surface brightness, smoothness, strength and wear resistance of the prepared grinding oil stone can be improved.

[0077] The preparation process of the grinding oilstone of the present invention is to select silicon nitride powder with a purity of not less than 99.9% and diamond micropowder with a purity of not less than 99.5% as raw materials to prepare the grinding oilstone. Silicon nitride has great application potential in the field of grinding tools due to its high hardness, high wear resistance and good chemical stability. Diamond, as the hardest substance in nature, has extremely high cutting ability and wear resistance. The present invention effectively combines silicon nitride with diamond to prepare a composite grinding oilstone, which can significantly improve the grinding efficiency and service life of the oilstone, and improves the performance during use compared with the existing method.

[0078] At the same time, by using one or at least two of oil-based binders, wax-based binders, oil-and-wax-based binders and polyaldehyde-based binders as binders, the surface brightness, smoothness, strength and wear resistance of the grinding oilstone can be improved. The added rare earth oxide can promote the refinement of grains during the sintering process, improve the density and strength of the material, and also help to improve the wear resistance and service life of the oilstone. The added metal phase can form a strong chemical bond with ceramic materials such as silicon nitride and diamond at high temperature, thereby improving the overall performance of the oilstone;

[0079] Secondly, the added yttrium oxide can promote the bonding between silicon nitride and diamond particles, improve the density and strength of the oilstone, and the added nanomaterials can enhance the bonding force and refine the grains, thereby solving the technical problems of the grinding oilstone in the prior art, which has poor performance in actual use and poor surface brightness and finish of the oilstone.

[0080] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A process for preparing a grinding oilstone, characterized in that: The steps include: 20-60 parts of silicon nitride powder with a purity of not less than 99.9%, 20-60 parts of diamond powder with a purity of not less than 99.5% and 4-10 parts of silicon carbide are selected in proportion for pretreatment and then added into a mixing device for uniform mixing; In the process of mixing silicon nitride powder and diamond powder, 4-6 parts of binder, 6-12 parts of curing agent, 2-6 parts of rare earth oxide, 1-3 parts of metal phase and 2-5 parts of yttrium oxide are added into the mixing device in proportion and mixed again to obtain a mixture for use; The mixture is molded to obtain an oilstone body; The oilstone body is subjected to high temperature sintering; The sintered oilstone can be post-processed to obtain grinding oilstone.

2. The process for preparing the grinding oilstone according to claim 1, characterized in that: The specific method of molding the mixture to obtain the oilstone blank is: molding the mixture into the oilstone blank of the desired shape by pressing or injection molding.

3. The process for preparing the grinding oilstone according to claim 2, characterized in that: The specific method of high temperature sintering of the oilstone blank is: The oilstone body is added into a high temperature sintering furnace for sintering, and during this process, the high temperature sintering should be performed under the protection of nitrogen or inert gas.

4. The process for preparing the grinding oilstone according to claim 3, characterized in that: The post-processing method of the sintered oilstone is: grinding and polishing the sintered oilstone, and performing surface coating treatment as needed.

5. The process for preparing the grinding oilstone according to claim 4, characterized in that: In the process of mixing silicon nitride powder and diamond powder, 2-4 parts of nano material are added in proportion, and the nano material includes one of nano aluminum oxide and nano silicon carbide.

6. The process for preparing the grinding oilstone according to claim 5, characterized in that: In the process of mixing silicon nitride powder and diamond powder, 2-3 parts of rare earth element are added, wherein the rare earth element includes one of lanthanum and cerium.

7. The process for preparing the grinding oilstone according to claim 6, characterized in that: The pretreatment methods for silicon nitride powder, diamond powder and silicon carbide include screening, cleaning and drying.

8. The process for preparing the grinding oilstone according to claim 7, characterized in that: The binder added in the process of mixing silicon nitride powder and diamond powder includes one of a metal binder and a ceramic binder; The metal binder is one or more of copper-tin pre-alloy powder, magnesium powder and silver powder; The ceramic binder is one of boron glass powder and intercalated modified kaolin powder.

9. The process for preparing the grinding oilstone according to claim 7, characterized in that: The binder is one or at least two of an oil-based binder, a wax-based binder, an oil-and-wax-based binder, and a polyaldehyde-based binder.

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