CN109834605B - Silica sol gel formed sintered grinding wheel and processing method thereof - Google Patents
Silica sol gel formed sintered grinding wheel and processing method thereof Download PDFInfo
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Abstract
The invention discloses a silica sol gel molded sintered grinding wheel and a processing method thereof. The sintered grinding wheel consists of a grinding wheel base material and a grinding material layer poured and sintered on the surface of the grinding wheel base material; the abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer: 10% -25% of diamond powder; 70-85% of a binding agent; 1.0-10% of nano silica sol; 0.5 to 1.0 percent of dispersant; 1.0 to 2.5 percent of thickening agent. The processing method of the silica sol gel molded sintered grinding wheel does not need a mold made of a superhard material, has small abrasion of the mold, long service life and simple molding process, and the obtained sintered grinding wheel has good grinding effect.
Description
Technical Field
The invention belongs to the technical field of grinding wheels, and particularly relates to a silica sol gel molded sintered grinding wheel and a processing method thereof.
Background
The sapphire, the superhard ceramic and other brittle materials are widely applied to mobile phones, precise electronic components, precise optical devices and high-grade watches due to high hardness and high brittleness, but the grinding processing difficulty is very high due to the fact that the texture of the sapphire, the superhard ceramic and other brittle materials has the characteristics of high hardness and high brittleness. When the common electroplating grinding wheel for processing glass is used for processing the superhard materials, the grinding efficiency is low, the service life is short, and the large-scale production and use are difficult.
The sintered grinding wheel has the characteristics of strong holding force and good wear resistance, and is particularly suitable for processing superhard materials. However, the sintered grinding wheel also has many difficulties in the manufacturing process, such as the need of the processes of die forming, high-pressure forming, high-temperature furnace sintering, precision grinding and the like, and these processes result in long production period, low productivity and much higher cost than the electroplated grinding wheel. In view of the problems of the sintered grinding wheel, the research direction in the field is mainly focused on the production process of the sintered grinding wheel. At present, a mould pressure forming mode is generally adopted for a sintered grinding wheel, and the mode has the following problems:
(1) the design of the die is complex, and particularly for a small-diameter grinding wheel, the die cannot bear excessive pressure;
(2) the service life of the die is low, and the high pressure causes the extrusion of the diamond and the surface of the die, so that the surface of the die is seriously scratched;
(3) the production efficiency is low, one pressure device needs to pass through the processes of filling, pressure maintaining and the like, and the device occupies a long time.
Disclosure of Invention
The invention provides a silica sol gel formed sintered grinding wheel and a processing method thereof, aiming at the problems that the design of a mould is complex, the service life of the mould is short, high pressure cannot be borne, the production efficiency is low and the like of the sintered grinding wheel formed by the existing mould pressure forming mode.
In order to achieve the above object, the technical solution of the present invention is as follows:
a silica sol gel molded sintered grinding wheel is composed of a grinding wheel base material and a grinding material layer poured and sintered on the surface of the grinding wheel base material;
the abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
and the processing method of the silica sol gel molded sintered grinding wheel at least comprises the following steps:
carrying out surface roughening treatment on the grinding wheel base material;
mixing the weighed diamond powder with a binding agent to obtain a first mixed material;
preparing the nano silica sol into a silica sol aqueous solution;
mixing the silica sol solution and the first mixed material, adding the dispersing agent and the thickening agent, uniformly mixing, adding deionized water to adjust the viscosity, and obtaining abrasive layer slurry;
spraying a release agent into a grinding wheel mold, placing the roughened grinding wheel base material into the grinding wheel mold, and then injecting the abrasive layer slurry;
placing the die in a drying oven, and keeping the temperature at 70-100 ℃ for 1.5-2.5 h to obtain a grinding wheel blank;
and sintering the grinding wheel blank at 250-1000 ℃ to obtain the sintered grinding wheel.
Compared with the prior art, the silica sol gel molded sintered grinding wheel provided by the invention has the advantages that the grinding material layer contains nano silica with larger specific surface area, adsorbability, high temperature resistance and chemical stability, the nano silica gel is aggregated to form a net colloid, the diamond and a bonding agent are well fixed and bonded, a grinding wheel blank with higher strength is obtained, the nano silica does not react with diamond and metal components in a mixture at high temperature during sintering, the performance of the sintered grinding wheel is not influenced, and the obtained sintered grinding wheel has good grinding effect.
Compared with the prior art, the processing method of the silica sol gel molded sintered grinding wheel provided by the invention adopts pouring (pouring) molding, so that the processing method is not limited by the shape of the grinding wheel and the shape of a base material, can be used for manufacturing the grinding wheel in any shape, has the same performance as the grinding wheel obtained by traditional processing, has low requirements on the material and processing of a die, does not need to use the die made of superhard material, has small die abrasion and long service life; the molding process is simple, automatic assembly line production can be adopted, the automation degree is high, and the production efficiency is high; and the minimum thickness of the abrasive layer can reach 0.2mm, the usage amount of the abrasive is small, and the deformation after sintering is small.
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FIG. 1 is a schematic flow chart of a method for processing a silica sol gel molded sintered grinding wheel according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a silica sol gel molded sintered grinding wheel. The sintered grinding wheel consists of a grinding wheel base material and a grinding material layer which is poured, adhered and sintered on the surface of the grinding wheel base material;
the abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
the technical solution of the present invention is further explained below.
The grinding wheel base material has the function of supporting the grinding wheel abrasive layer in the grinding wheel.
Optionally, the grinding wheel base material is a copper base material or a stainless steel base material or a tungsten steel base material, and the base material has the characteristics of high temperature resistance, difficult oxidation and the like.
Preferably, the thickness of the abrasive layer is 0.2mm to 2 mm.
When the material of the abrasive layer is poured or poured on the grinding wheel base material, a grinding wheel mold is needed to ensure that the material of the abrasive layer can be molded. Meanwhile, in the mixing process of the abrasive layer material, a proper amount of deionized water needs to be added, so that all components of the abrasive layer are uniformly mixed to form slurry, but the deionized water is volatilized in the sintering process, so that the deionized water is not used as the components of the abrasive layer. In addition to using deionized water to dissolve the raw materials of the abrasive layer, other solvents may be used, and any solvent may be used as long as it does not chemically react with the raw materials of the abrasive layer, and is volatilized during high-temperature sintering.
In the above technical solution, the diamond powder mainly functions as an abrasive.
Preferably, the diamond powder has a particle size of 100# to 800#, and diamond particles with too large size can cause diamond deposition, while diamond particles with too small size can cause diamond floating on the upper layer, which is not favorable for uniform distribution of diamond particles.
In any embodiment, the binding agent plays a role in binding diamond powder, nano silica sol, a dispersing agent, a thickening agent and the like on the surface of the grinding wheel base material, can also enhance the binding force among the material components of the abrasive layer, and simultaneously, has a synergistic effect with the nano silica sol so as to enable the adhesive force of the abrasive layer to be stronger.
Preferably, the binder is any one of a resin binder, a metal binder, and a ceramic binder.
When the resin binder is selected, the sintering is carried out only at about 250 ℃ without a vacuum environment; if the metal bonding agent is selected, the sintering temperature is 800-900 ℃ during sintering, and the diamond and the copper powder are required to be in a vacuum environment or in an inert gas protection atmosphere to avoid oxidation reaction during sintering; similarly, if the ceramic bond is selected, the sintering temperature is 900-1000 ℃ during sintering, and the diamond and the copper powder are required to be in a vacuum environment or in an inert gas protection atmosphere to avoid oxidation reaction during sintering.
Further preferably, the resin binder is any one of a phenol resin binder, an epoxy resin binder, and a polyurethane resin binder.
In any embodiment, the nano silica sol is nano silica with larger specific surface area, adsorbability, high temperature resistance and chemical stability, and the nano silica gel is aggregated to form a net colloid, so that the nano silica gel can play a good role in fixing and bonding diamond and resin adhesives to obtain a grinding wheel blank with higher strength, and the nano silica does not react with diamond and metal components in a mixture at high temperature during sintering, so that the performance of the grinding wheel after sintering is not influenced.
In any embodiment, the dispersant acts primarily to disperse the abrasive layer material, avoiding agglomeration of the abrasive layer components.
Preferably, the dispersant is any one of polyethylene glycol, polyethylene and water glass.
In any embodiment, the thickening agent can effectively increase the viscosity of the solution, and is beneficial to uniformly distributing diamond particles in the binder solution.
Preferably, the thickener may be an organic thickener or an inorganic thickener.
Further preferably, the organic thickener is hydroxypropyl methylcellulose; the inorganic thickener is any one of bentonite and diatomite.
According to the silica sol gel molded sintered grinding wheel provided by the embodiment of the invention, because the silica sol gel molded sintered grinding wheel simultaneously contains the binding agent and the nano silica sol, the binding agent and the nano silica sol can generate a synergistic effect, so that each component of the grinding material layer can be strongly adhered to the surface of the grinding wheel base material, especially, the nano silica has larger specific surface area, adsorbability, high temperature resistance and chemical stability, and is aggregated to form a net colloid in the gelling process, so that the diamond and the binding agent are well fixed and adhered, a grinding wheel blank with higher strength is obtained, the nano silica does not react with diamond and metal components in the mixture at high temperature during sintering, the performance of the sintered grinding wheel is not influenced, and the obtained sintered grinding wheel has a good grinding effect.
The invention further provides a processing method of the silica sol gel formed sintered grinding wheel on the basis of the silica sol gel formed sintered grinding wheel provided by the embodiment.
As shown in fig. 1, in an embodiment, the method for processing the silica sol gel molded sintered grinding wheel at least includes the following steps:
weighing the components according to the formula of the silica sol gel molded sintered grinding wheel;
carrying out surface roughening treatment on the grinding wheel base material;
mixing the weighed diamond powder with a binding agent to obtain a first mixed material;
preparing the nano silica sol into a silica sol aqueous solution;
mixing the silica sol solution and the first mixed material, adding the dispersing agent and the thickening agent, uniformly mixing, adding deionized water to adjust the viscosity, and obtaining abrasive layer slurry;
spraying a release agent into a grinding wheel mold, placing the roughened grinding wheel base material into the grinding wheel mold, and then injecting the abrasive layer slurry;
placing the die in a drying oven, and keeping the temperature at 70-100 ℃ for 1.5-2.5 h to obtain a grinding wheel blank;
and sintering the grinding wheel blank at 250-1000 ℃ to obtain the sintered grinding wheel.
Compared with the traditional pressure extrusion molding grinding wheel, the processing method of the silica sol gel molded sintered grinding wheel achieves the purpose of powder molding in a non-pressure mode, namely pouring (pouring) molding is adopted, so that the grinding wheel is not limited by the shape of the grinding wheel and the shape of a base material, the grinding wheel with any shape can be manufactured, the performance of the molded grinding wheel is the same as that of the grinding wheel obtained by traditional processing, and in addition, the processing method of the invention can obtain the grinding wheel with the thinnest grinding material layer of 0.2mm without complex processing process.
The above processing method is explained further below.
In any of the examples, the nanosilica is prepared as a solution in order to allow good dispersion of the nanosilica in the abrasive layer components.
Preferably, the mass concentration of the nano silica gel aqueous solution is 25-35%.
Preferably, the viscosity of the abrasive layer slurry is 500cps to 1000cps, and when the abrasive layer slurry is formed, if the viscosity is not within the range, deformation and the like easily occur during casting or pouring. Thus, a suitable solvent such as deionized water or a solvent that does not chemically react with the abrasive layer material and decomposes at high temperatures may be added.
Before the abrasive layer slurry is poured or poured, a release agent needs to be sprayed on the mold, and the release is mainly convenient.
Preferably, the release agent is any one of a dimethylsilicone release agent and vaseline.
Preferably, the sintering is performed in a vacuum environment or a non-vacuum environment according to the selected binder, and the sintering temperature is different. If the resin bonding agent is selected, the sintering is carried out only at about 250 ℃ and a vacuum environment is not needed, if the temperature is too high, the resin bonding agent is decomposed, and about 250 ℃, diamond and copper powder do not have any chemical reaction, so that the vacuum environment is not needed; if the metal bonding agent is selected, the sintering temperature is 800-900 ℃ during sintering, and the diamond and the copper powder are required to be in a vacuum environment or in an inert gas protection atmosphere to avoid oxidation reaction during sintering; similarly, if the ceramic bond is selected, the sintering temperature is 900-1000 ℃ during sintering, and the diamond and the copper powder are required to be in a vacuum environment or in an inert gas protection atmosphere to avoid oxidation reaction during sintering.
And cooling by adopting a natural cooling mode after the sintering treatment.
Preferably, the grinding wheel die is a stainless steel die, which is resistant to high temperature, oxidation and reaction.
The processing method of the silica sol gel molded sintered grinding wheel provided by the invention has low requirements on the material and processing of the die, does not need to use the die made of a superhard material, has small die abrasion and long service life; the molding process is simple, automatic assembly line production can be adopted, the automation degree is high, and the production efficiency is high; and the minimum thickness of the abrasive layer can reach 0.2mm, the usage amount of the abrasive is small, the deformation amount after sintering is small, if the thickness of the abrasive layer is 0.2mm, the sintering deformation amount is only about 0.03mm, and the deformation rate is 15%, and if the thickness of the abrasive layer is 1mm, the deformation amount is also only about 0.2mm, and the deformation rate is 20%.
In order to better illustrate the silica sol gel formed sintered grinding wheel and the processing method thereof provided by the present invention, the following is further explained by a plurality of examples.
Example 1
The silica sol gel molded sintered grinding wheel is composed of a copper grinding wheel base material and an abrasive layer which is poured, adhered and sintered on the surface of the copper grinding wheel base material, wherein the thickness of the abrasive layer is 0.5 mm.
The abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
the processing method of the silica sol gel molded sintered grinding wheel comprises the following steps:
(1) carrying out roughening treatment on the surface of the copper grinding wheel base material;
(2) uniformly mixing phenolic resin binder and No. 600 diamond powder to obtain a first mixture;
(3) adding an alkaline nano silica sol solution accounting for 7% of the total mixture by mass and accounting for 30% of the total mixture by mass, polyethylene glycol accounting for 1% of the total mixture by mass and hydroxypropyl methyl cellulose accounting for 2% of the total mixture by mass into the first mixture, and adding a proper amount of deionized water to prepare a slurry with the viscosity of about 800 cps;
(4) spraying a polydimethylsiloxane oil release agent into the stainless steel mold cavity;
(5) fixing the roughened copper substrate in a mould, and injecting the prepared slurry in the step (3);
(6) placing the stainless steel mold and the injected slurry into a drying box for 2 hours, and controlling the heat preservation temperature to be 80 ℃;
(7) taking out the stainless steel mould and demoulding to obtain a grinding wheel blank;
(8) and (3) heating and sintering at a high temperature of 250 ℃ in a non-vacuum environment to obtain the No. 600 resin diamond grinding wheel with the outer diameter of D6.
Example 2
The silica sol gel molded sintered grinding wheel consists of a copper grinding wheel base material and an abrasive layer which is poured, adhered and sintered on the surface of the copper alloy grinding wheel base material, wherein the thickness of the abrasive layer is 0.5 mm.
The abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
the processing method of the silica sol gel molded sintered grinding wheel comprises the following steps:
(1) carrying out roughening treatment on the surface of the copper grinding wheel base material;
(2) uniformly mixing a copper powder binder and 600# diamond powder to obtain a first mixture;
(3) adding an alkaline nano silica sol solution accounting for 5% of the total mixture by mass and accounting for 25% of the total mixture by mass, polyethylene glycol accounting for 1% of the total mixture by mass and hydroxypropyl methyl cellulose accounting for 2% of the total mixture by mass into the first mixture, and adding a proper amount of deionized water to prepare slurry with the viscosity of about 1000 cps;
(4) spraying a polydimethylsiloxane oil release agent into the stainless steel mold cavity;
(5) fixing the roughened copper grinding wheel base material in a mold, and injecting the prepared slurry in the step (3);
(6) placing the stainless steel mold and the injected slurry into a drying box for 2 hours, and controlling the heat preservation temperature to be 80 ℃;
(7) taking out the stainless steel mould and demoulding to obtain a grinding wheel blank;
(8) and (3) heating and sintering at high temperature under a vacuum environment (the vacuum degree is about 0.15 mbar), wherein the sintering temperature is 900 ℃, and the 600# copper-based diamond grinding wheel with the outer diameter D6 is obtained.
Example 3
The silica sol gel molded sintered grinding wheel consists of a ceramic grinding wheel base material and an abrasive layer which is poured, adhered and sintered on the surface of the ceramic grinding wheel base material, wherein the thickness of the abrasive layer is 0.5 mm.
The abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
the processing method of the silica sol gel molded sintered grinding wheel comprises the following steps:
(1) carrying out roughening treatment on the surface of the ceramic grinding wheel substrate;
(2) uniformly mixing the ceramic bond and the No. 600 diamond powder to obtain a mixture;
(3) adding an alkaline nano silica sol solution accounting for 5 percent of the total mixture by mass and accounting for 25 percent of the total mixture by mass, polyethylene glycol accounting for 1 percent of the total mixture by mass and hydroxypropyl methyl cellulose accounting for 2 percent of the total mixture by mass into the mixture, and adding a proper amount of deionized water to prepare slurry with the viscosity of about 500 cps;
(4) spraying a polydimethylsiloxane oil release agent into the stainless steel mold cavity;
(5) fixing the ceramic substrate subjected to roughening treatment in a mold, and injecting the prepared slurry in the step (3);
(6) placing the stainless steel mold and the injected slurry into a drying box for 2 hours, and controlling the heat preservation temperature to be 100 ℃;
(7) taking out the stainless steel mould and demoulding to obtain a grinding wheel blank;
(8) and (3) heating and sintering at high temperature of 1000 ℃ in a vacuum environment to obtain the 600# ceramic-based diamond grinding wheel with the outer diameter of D6.
Example 4
The silica sol gel molded sintered grinding wheel consists of a ceramic grinding wheel base material and an abrasive layer which is poured, adhered and sintered on the surface of the ceramic grinding wheel base material, wherein the thickness of the abrasive layer is 0.5 mm.
The abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
the processing method of the silica sol gel molded sintered grinding wheel comprises the following steps:
(1) carrying out roughening treatment on the surface of the ceramic grinding wheel substrate;
(2) uniformly mixing the ceramic bond and 800# diamond powder to obtain a mixture;
(3) adding an alkaline nano silica sol solution accounting for 1.5 percent of the total mixture by mass and accounting for 25 percent of the total mixture by mass, polyethylene glycol accounting for 1 percent of the total mixture by mass and hydroxypropyl methyl cellulose accounting for 2.5 percent of the total mixture by mass into the mixture, and adding deionized water to modulate into slurry with the viscosity of about 500 cps;
(4) spraying a polydimethylsiloxane oil release agent into the stainless steel mold cavity;
(5) fixing the ceramic substrate subjected to roughening treatment in a mold, and injecting the prepared slurry in the step (3);
(6) placing the stainless steel mold and the injected slurry into a drying box for 2 hours, and controlling the heat preservation temperature to be 100 ℃;
(7) taking out the stainless steel mould and demoulding to obtain a grinding wheel blank;
(8) and (3) heating and sintering at a high temperature of 950 ℃ in a vacuum environment to obtain the 800# ceramic-based diamond grinding wheel with the outer diameter of D6.
Example 5
The silica sol gel molded sintered grinding wheel consists of a ceramic grinding wheel base material and an abrasive layer which is poured, adhered and sintered on the surface of the ceramic grinding wheel base material, wherein the thickness of the abrasive layer is 0.5 mm.
The abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
the processing method of the silica sol gel molded sintered grinding wheel comprises the following steps:
(1) carrying out roughening treatment on the surface of the ceramic grinding wheel substrate;
(2) uniformly mixing a ceramic bond and 700# diamond powder to obtain a first mixture;
(3) adding an alkaline nano silica sol solution accounting for 3.5 percent of the mass of the total mixture and accounting for 25 percent of the mass of the total mixture, polyethylene glycol accounting for 0.5 percent of the mass of the total mixture and hydroxypropyl methyl cellulose accounting for 1 percent of the mass of the total mixture into the first mixture, and adding a proper amount of deionized water to prepare slurry with the viscosity of about 500 cps;
(4) spraying a polydimethylsiloxane oil release agent into the stainless steel mold cavity;
(5) fixing the ceramic substrate subjected to roughening treatment in a mold, and injecting the prepared slurry in the step (3);
(6) placing the stainless steel mold and the injected slurry into a drying box for 2 hours, and controlling the heat preservation temperature to be 100 ℃;
(7) taking out the stainless steel mould and demoulding to obtain a grinding wheel blank;
(8) and (3) heating and sintering at high temperature of 900 ℃ in a vacuum environment to obtain the 700# ceramic-based diamond grinding wheel with the outer diameter of D6.
Example 6
The silica sol gel molded sintered grinding wheel consists of a ceramic grinding wheel base material and an abrasive layer which is poured, adhered and sintered on the surface of the ceramic grinding wheel base material, wherein the thickness of the abrasive layer is 0.5 mm.
The abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
the processing method of the silica sol gel molded sintered grinding wheel comprises the following steps:
(1) carrying out roughening treatment on the surface of the ceramic grinding wheel substrate;
(2) uniformly mixing a ceramic bond and 600# diamond powder to obtain a first mixture;
(3) adding an alkaline nano silica sol solution accounting for 10% of the total mixture by mass and accounting for 25%, polyethylene glycol accounting for 1% of the total mixture by mass and hydroxypropyl methyl cellulose accounting for 1% of the total mixture by mass into the first mixture, and adding a proper amount of deionized water to prepare slurry with the viscosity of about 500 cps;
(4) spraying a polydimethylsiloxane oil release agent into the stainless steel mold cavity;
(5) fixing the ceramic substrate subjected to roughening treatment in a mold, and injecting the prepared slurry in the step (3);
(6) placing the stainless steel mold and the injected slurry into a drying box for 2 hours, and controlling the heat preservation temperature to be 100 ℃;
(7) taking out the stainless steel mould and demoulding to obtain a grinding wheel blank;
(8) and (3) heating and sintering at high temperature of 900 ℃ in a vacuum environment to obtain the 700# ceramic-based diamond grinding wheel with the outer diameter of D6.
In order to verify the characteristic difference between the grinding wheels obtained in the embodiments 1 to 6 of the present invention and the grinding wheels prepared by the existing extrusion molding (comparative examples 1 to 3), the grinding wheels were respectively subjected to corresponding tests, and the specific test data are shown in table 1.
As can be seen from Table 1, the performance of the grinding wheel cast by the gel method is similar to that of the grinding wheel prepared by the conventional extrusion method. The purpose of powder molding is achieved by adopting a pouring (pouring) molding (or non-pressure) mode, so that the grinding wheel with any shape can be manufactured without the limitation of the shape of the grinding wheel and the shape of a base material, and the performance of the molded grinding wheel is the same as that of the grinding wheel obtained by traditional extrusion processing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A silica sol gel formed sintered grinding wheel is characterized in that: the sintered grinding wheel consists of a grinding wheel base material and a grinding material layer poured and sintered on the surface of the grinding wheel base material;
the abrasive layer is prepared by adopting the following raw material components by 100 percent of the mass of the raw material for preparing the abrasive layer:
wherein, the pouring and sintering comprises the following steps: uniformly mixing each component of the raw materials of the abrasive layer with deionized water to prepare slurry, injecting the slurry into a grinding wheel mold, then preserving heat for 1.5-2.5 h in a drying oven at 70-100 ℃, and then sintering at 250-1000 ℃.
2. The silica sol gel shaped sintered abrasive wheel of claim 1, wherein: the granularity of the diamond powder is 100# to 800 #.
3. The silica sol gel formed sintered abrasive wheel according to any one of claims 1 to 2, wherein: the bonding agent is any one of resin bonding agent, metal bonding agent and ceramic bonding agent.
4. The silica sol gel formed sintered abrasive wheel according to any one of claims 1 to 2, wherein: the dispersing agent is any one of polyethylene glycol, polyethylene and water glass;
the thickener is an organic thickener or an inorganic thickener.
5. The silica sol gel shaped sintered abrasive wheel of claim 4, wherein: the organic thickener is hydroxypropyl methyl cellulose; the inorganic thickener is any one of bentonite and diatomite.
6. The silica sol gel formed sintered abrasive wheel according to any one of claims 1 to 2, wherein: the grinding wheel base material is any one of a copper base material, a stainless steel base material and a tungsten steel base material.
7. The method of machining a silica sol gel-formed sintered grinding wheel according to any one of claims 1 to 6, characterized in that: at least comprises the following steps:
carrying out surface roughening treatment on the grinding wheel base material;
mixing the weighed diamond powder with a binding agent to obtain a first mixed material;
preparing the nano silica sol into a nano silica sol aqueous solution;
mixing the nano silica sol solution and the first mixed material, adding the dispersing agent and the thickening agent, uniformly mixing, adding deionized water to adjust the viscosity, and obtaining abrasive layer slurry; wherein the viscosity of the abrasive layer slurry is 500cps to 1000 cps;
spraying a release agent into a grinding wheel mold, placing the roughened grinding wheel base material into the grinding wheel mold, and then injecting the abrasive layer slurry;
placing the die in a drying oven, and keeping the temperature at 70-100 ℃ for 1.5-2.5 h to obtain a grinding wheel blank;
and sintering the grinding wheel blank at 250-1000 ℃ to obtain the sintered grinding wheel.
8. The method of claim 7, wherein the sol-gel formed sintered abrasive wheel comprises: the release agent is any one of a dimethyl silicone oil release agent and vaseline;
the mass concentration of the nano silica sol aqueous solution is 25-35%.
9. The method of claim 7, wherein the sol-gel formed sintered abrasive wheel comprises: and cooling by adopting a natural cooling mode after the sintering treatment.
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| CN114213109B (en) * | 2021-12-30 | 2023-03-10 | 辽宁省轻工科学研究院有限公司 | High-precision and high-strength ceramic hand mold and preparation method thereof |
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| US4720941A (en) * | 1986-06-23 | 1988-01-26 | Jo-Ed Enterprises, Inc. | Self-cooling, non-loading abrading tool |
| US5702811A (en) * | 1995-10-20 | 1997-12-30 | Ho; Kwok-Lun | High performance abrasive articles containing abrasive grains and nonabrasive composite grains |
| US6454644B1 (en) * | 2000-07-31 | 2002-09-24 | Ebara Corporation | Polisher and method for manufacturing same and polishing tool |
| CN101913121B (en) * | 2010-07-14 | 2012-06-20 | 华南理工大学 | Method for preparing non-woven fabric polishing abrasive tool with high abrasion resistance |
| CN105127915A (en) * | 2015-08-27 | 2015-12-09 | 安徽威铭耐磨材料有限公司 | High-grinding precision and high-strength CBN grinding wheel with ultrafine granularity and containing nanometer carbon fibers and preparation method thereof |
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Effective date of registration: 20230515 Address after: 237000 Building D-1, Jinwutong Venture Park, Jinzhai Economic Development Zone (Modern Industrial Park), Lu'an City, Anhui Province Patentee after: Shanyi Precision Tools (Anhui) Co.,Ltd. Address before: 237300 Shuiwei formation, Fuling village, Nanxi Town, Jinzhai County, Lu'an City, Anhui Province Patentee before: Xiang Gang |
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