A process for infiltrating a ceramic grinding wheel with wax

Abstract

The application belongs to the field of abrasive tool abrasive processing, and particularly relates to a ceramic grinding wheel wax infiltration process. The ceramic grinding wheel wax infiltration process is realized by using a wax infiltration device; the wax infiltration device comprises a wax infiltration pot A, a wax infiltration pot B, and a wax infiltration pipeline capable of connecting the wax infiltration pot A and the wax infiltration pot B. The process is used to infiltrate a wax liquid with good fluidity into the pores of the grinding wheel by vacuumizing, and in the high-speed grinding process of the prepared grinding wheel, a large amount of grinding heat is continuously generated, and after the pores of the grinding wheel are filled with the wax, the grinding heat caused by the grinding simultaneously acts on the workpiece and the wax, a large amount of grinding heat is taken away by the melting and gasification of the wax, and the workpiece is prevented from being burnt; meanwhile, the melted wax liquid acts on the grinding area, so that an adsorption film is formed between the grinding wheel and the workpiece, and the adsorption film plays a lubricating and rust-proof role and improves the grinding quality of the workpiece. The wax infiltration process is easy to popularize and apply in the abrasive tool industry and the processing industry.

Description

Technical Field

[0001] This invention belongs to the field of abrasive processing technology, specifically relating to a wax infiltration process for ceramic grinding wheels. Background Technology

[0002] Ceramic grinding tools often generate a large amount of grinding heat during the grinding process. If this heat is too high, burns will occur on the workpiece surface, affecting the surface quality. Currently, the problem of workpiece burns is often solved by using large-pore ceramic grinding wheels. Although large-pore ceramic grinding wheels can solve the problem of workpiece burns, it is difficult to maintain the workpiece shape for profile grinding. Another common solution to the problem of workpiece burns is sulfur diffusion. Sulfur can carry away some of the heat during grinding to prevent workpiece burns. However, sulfur diffusion operations cause significant air pollution and are harmful to human health, and this is a process that is currently being phased out.

[0003] Waxes are esters formed from high-molecular-weight monohydric alcohols and long-chain fatty acids. Chemically, they differ from fats, paraffin wax, and synthetic polyether waxes, hence they are also called ester waxes. Long-chain fatty acid esters of high-molecular-weight monohydric alcohols are called true waxes; for example, the main component of beeswax is palmitate esters of long-chain monohydric alcohols (C26-C36). Wool wax, for instance, is a complex mixture containing ester waxes, alcohols, and fatty acids; after purification, it is called lanolin, a fatty acid ester of lanosterol. Carnauba wax, another important plant wax, is a mixture of ester waxes with the chemical formula CH3(CH2). n+1 ·COO(CH2) n+1 CH3, n=22~32.

[0004] The definition of "wax" varies depending on the context. In a narrow sense, wax usually refers to fatty acids, monovalent or divalent fatty alcohols, and oily substances with high melting points. However, in a broader sense, wax generally refers to substances produced by plants, animals, or minerals that are solid at room temperature, easily liquefied or vaporized upon heating, easily combustible, insoluble in water, and possess a certain lubricating effect. Waxes can be classified according to their source into plant waxes, animal waxes, mineral waxes, and synthetic waxes. Common types of plant waxes include: soybean wax, coconut wax, wood wax, bayberry wax, candelilla wax, candelilla wax, Japanese fine wax, palm wax, rice bran wax, jojoba oil castor wax, etc.

[0005] Waxes generally have relatively high solidification points, ranging from approximately 38 to 90°C, and relatively low iodine values, between 1 and 15, indicating a lower degree of unsaturation than neutral fats. In terms of properties, waxes are solid at room temperature, easily liquefy or vaporize upon heating, are easily combustible, insoluble in water, and possess a certain degree of lubrication.

[0006] Grinding workpieces with a grinding wheel easily generates a large amount of grinding heat, with the temperature at the grinding point sometimes exceeding 1000℃. Cooling with coolant and heat absorption by the workpiece can significantly reduce the temperature of the grinding zone. However, for difficult-to-grind workpieces with poor heat dissipation, chip adhesion and burns often occur. Therefore, solving the burn problem still requires in-depth research.

[0007] Chinese Patent Publication No. CN101791786A discloses an impregnating agent for impregnating grinding wheels, which is made of a solid lubricant, a surfactant, a dispersant, an anti-adhesion additive, and water. The solid lubricant is molybdenum disulfide and paraffin wax, and the anti-adhesion additive is sodium molybdate and tributyl phosphate. Although this impregnating agent can improve the working conditions of grinding wheels, it contains sulfur and phosphorus, which pose certain environmental hazards.

[0008] In order to achieve both environmental protection and the solution to burn problems, the inventors discovered through experimentation that selecting suitable wax-infiltrating materials and easy-to-operate wax-infiltrating processes can improve the grinding wheel process, thereby solving the technical problems existing in the prior art. Summary of the Invention

[0009] The purpose of this invention is to provide a wax infiltration process for ceramic grinding wheels, infiltrating a highly fluid wax liquid into the pores of the grinding wheel through a vacuum process. During high-speed grinding, the grinding wheel continuously generates friction, accumulating a large amount of grinding heat. By filling the pores of the grinding wheel with wax, the grinding heat generated during grinding is simultaneously applied to both the workpiece and the wax. The melting and vaporization of the wax removes a significant amount of grinding heat, preventing workpiece burns. Simultaneously, the melted wax acts on the grinding zone, forming an adsorption film between the grinding wheel and the workpiece, providing lubrication and rust prevention, thus improving the grinding quality of the workpiece.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A wax infiltration process for ceramic grinding wheels, achieved using a wax infiltration device;

[0012] The wax infiltration device includes a wax infiltration pot A, a wax infiltration pot B, and a wax infiltration pipeline that can connect the wax infiltration pot A and the wax infiltration pot B.

[0013] The top of the wax infiltration pot A is equipped with a first valve and a second valve, and the top of the wax infiltration pot B is equipped with a third valve and a fourth valve; a fifth valve is provided on the wax infiltration pipeline.

[0014] The first valve and the third valve are respectively connected to an external vacuum pumping device.

[0015] Specifically, the first and third valves are vacuum valves, while the second and fourth valves are vacuum release valves.

[0016] Specifically, the wax impregnation pot A, wax impregnation pot B, wax impregnation pipeline, first valve, second valve, third valve, fourth valve and fifth valve all have a certain degree of sealing, thereby ensuring that a specific vacuum degree can be achieved when vacuuming is performed during the wax impregnation process.

[0017] Specifically, the wax infiltration device also includes a heating device capable of heating the wax infiltration pot A, wax infiltration pot B, wax infiltration pipeline and the fifth valve to a specific temperature. The specific heating device adopts equipment commonly used in the prior art, and its structure is not the inventive point of this invention, so it will not be described in detail.

[0018] Specifically, the ceramic grinding wheel wax infiltration process includes the following steps:

[0019] 1) First, close the first valve, the second valve, the third valve, the fourth valve and the fifth valve. Weigh each component according to the wax composition ratio and place it in the wax infiltration pot A. Heat the wax infiltration pot A, the wax infiltration pot B and the fifth valve to a temperature of 120~150℃ to melt the wax.

[0020] 2) Place the grinding wheel into the wax impregnation pot B and preheat for 15~30 minutes. Then open the third valve to evacuate the vacuum in the wax impregnation pot B to -0.10~-0.09MPa, and then close the third valve.

[0021] 3) Open the fifth valve. Under the action of negative pressure, the melted wax flows from waxing pot A into waxing pot B for waxing. After all the wax in waxing pot A has flowed out, close the fifth valve.

[0022] 4) Then, open the fourth valve of the waxing pot B to release the negative pressure to normal pressure. At the same time, open the first valve of the waxing pot A and evacuate to a vacuum degree of -0.10~-0.09MPa. Open the fifth valve and the melted wax flows back to the waxing pot A under the action of negative pressure. After all the wax flows out of the waxing pot B, take out the finished grinding wheel after waxing.

[0023] Furthermore, to ensure sufficient wax penetration, after wax penetration in wax penetration pot B in step 3), the fourth valve can be opened to release the vacuum, the grinding wheel can be removed and placed in wax penetration pot A, the fourth valve can be closed, and the first valve can be opened to evacuate the vacuum in wax penetration pot A to -0.10~-0.09MPa, and then the first valve can be closed; the fifth valve can be opened, and the molten wax flows from wax penetration pot B to wax penetration pot A under the action of negative pressure. The same wax penetration method as the above process is used to penetrate the wax in reverse from wax penetration pot B to wax penetration pot A; the molten wax is repeatedly operated between wax penetration pot A and wax penetration pot B under the action of negative pressure to achieve cyclic wax penetration and improve the wax penetration effect.

[0024] Specifically, the grinding wheel is made from the following raw materials in the indicated mass fractions: 40-45% brown fused alumina, 40-45% white fused alumina, and 10-15% ceramic binder.

[0025] More preferably, the ceramic binder has the following composition (by mass percentage): 45-60% clay powder, 35-40% feldspar powder, and 0-20% quartz powder.

[0026] Specifically, the clay powder is black clay powder with a mesh size of 600; the quartz powder is nano quartz powder with a mesh size of 500 nanometers; and the feldspar powder has a mesh size of 800.

[0027] Specifically, the optimal wax melting temperature in step 1) is 150℃.

[0028] Specifically, in steps 2) and 4), the vacuum is evacuated to a vacuum level of -0.09 MPa or -0.10 MPa.

[0029] Specifically, in step 3), the temperature during wax infiltration should be controlled at 100~150℃, preferably 120℃.

[0030] Preferably, the wax infiltration time in step 3) is 15~30 min.

[0031] In a further preferred embodiment, in step 3), in order to ensure uniform wax penetration, the wax penetration time should be adjusted according to the size of the grinding wheel. Specifically, for grinding wheels with a diameter of less than 100mm, the wax penetration time is 15-20 minutes, and for grinding wheels with a diameter of more than 100mm, the wax penetration time is 20-30 minutes.

[0032] Preferably, the wax liquid composition is based on palm wax as the main component, with the addition of auxiliary waxes and surfactants; the auxiliary waxes include one of the following plant waxes as secondary components: soybean wax, coconut wax, wood wax, bayberry wax, candelilla wax, kandioli wax, Japanese fine wax, rice bran wax, jojoba oil castor wax, etc.; the surfactants include one or both of ethylenediamine oleate and oleic acid.

[0033] More preferably, the composition of the wax liquid is as follows: palm wax 50-80%, auxiliary wax 18-49%, and surfactant 1-2%.

[0034] More preferably, the surfactant is ethylenediamine oleate and oleic acid in a mass ratio of (0.5~1.0):1.

[0035] More preferably, the wax liquid composition is (by mass percentage): 80% palm wax, 19% wood wax, and 1% surfactant, or 80% palm wax, 19.5% wood wax, and 0.5% surfactant; wherein the surfactant is ethylenediamine oleate and oleic acid in a mass ratio of 0.8:1 or 0.5:1.

[0036] Furthermore, based on a general inventive concept, the present invention also provides a wax-impregnated ceramic grinding wheel prepared by the above-described process.

[0037] Furthermore, based on a general inventive concept, the present invention also provides the application of the wax-impregnated ceramic grinding wheel in bearing grinding, specifically for the precision cutting of the inner ring groove of the bearing.

[0038] Furthermore, based on a general inventive concept, the present invention also provides a method for grinding bearings using the aforementioned wax-infiltrated ceramic grinding wheel. During grinding, the workpiece rotation speed is 120~150 rpm, the grinding wheel rotation speed is 50~60 m / s, the dressing amount is 1~1.5 μm, and the feed rate is 0.5~1 mm / min.

[0039] Specifically, the grinding location is the inner ring groove of the bearing, the material is bearing steel GCr15, and the material hardness is HRC58-65.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] 1. The impregnation material (wax liquid) used in this invention has good environmental protection properties, and the wax used is mostly natural plant wax with low pollution.

[0042] 2. The process described in this invention uses a circulating wax infiltration method, which has high efficiency. The two pots can be continuously and alternately infiltrated with wax, and the operation is simple.

[0043] 3. The abrasives produced by the process of this invention do not suffer from surface quality problems such as burns, scratches, and vibration marks when processing workpieces. The durability and service life of the abrasives can be increased by more than 100%.

[0044] In summary, the wax infiltration process described in this invention has three advantages: environmental friendliness, high efficiency, and improved processing quality, making it easy to promote and apply in the abrasive and machining industries. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the wax infiltration device in the ceramic grinding wheel wax infiltration process described in this invention;

[0046] Figure 2 The diagram shows the morphology of the grinding wheel before and after wax impregnation. Figure a shows the state of the grinding wheel before impregnation, figure b shows the state of the grinding wheel after impregnation, and figure c shows the internal state of the grinding wheel after impregnation. Figure 2 In c, c1 is the abrasive particle (corundum-based abrasive), c2 is the ceramic binder, c3 is the pore, and c4 is the impregnation material;

[0047] Figure 3The images show a comparison of the surface quality of workpieces ground by the grinding wheels in Examples 1-3. In Example 1, a represents the surface quality of the workpiece ground by the wax-infiltrated ceramic grinding wheel; b represents the surface quality of the workpiece ground by the wax-infiltrated ceramic grinding wheel in Example 2; c represents the surface quality of the workpiece ground by the wax-infiltrated ceramic grinding wheel in Example 3; and d represents the surface quality of the workpiece ground by the control group product. Detailed Implementation

[0048] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0049] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0050] The trade names and manufacturers of the raw materials used in the following examples are shown in Table 1.

[0051] Table 1.

[0052]

[0053] The composition and specifications of the grinding wheels described in the following examples are shown in Tables 2 and 3.

[0054] Table 2.

[0055]

[0056] Table 3.

[0057]

[0058] The main components (by mass percentage) of the ceramic binder are: 52% clay powder, 38% feldspar powder, and 10% quartz powder.

[0059] Specifically, the specifications and manufacturers of each component in the ceramic binder are as follows:

[0060] The clay powder is black clay powder, 600 mesh, manufactured by China Kaolin Co., Ltd. Its main chemical composition (mass percentage) is shown in the table below:

[0061] Table 4.

[0062]

[0063] The quartz powder is nano-quartz powder, with a specification of 500 nanometers. The manufacturer is Xuzhou Yingnuo New Materials Co., Ltd. Its main chemical composition (mass percentage) is shown in the table below:

[0064] Table 5.

[0065]

[0066] Feldspar powder, 800 mesh, manufactured by Lingshou County Hongyu Mineral Products Co., Ltd., has the following main chemical composition (mass percentage):

[0067] Table 6.

[0068]

[0069] Example 1

[0070] Example 1 provides a ceramic grinding wheel wax infiltration process, using, as follows Figure 1 The wax infiltration device shown achieves this;

[0071] The wax infiltration device includes a wax infiltration pot A, a wax infiltration pot B, and a wax infiltration pipeline that can connect the wax infiltration pot A and the wax infiltration pot B.

[0072] The top of the wax infiltration pot A is equipped with a first valve 1 and a second valve 2, and the top of the wax infiltration pot B is equipped with a third valve 3 and a fourth valve 4; a fifth valve 5 is provided on the wax infiltration pipeline; the first valve 1 and the third valve 3 are vacuum valves, and the second valve 2 and the fourth valve 4 are vacuum release valves.

[0073] The first valve 1 and the third valve 3 are respectively connected to an external vacuum pumping device;

[0074] The wax impregnation pot A, wax impregnation pot B, wax impregnation pipeline, first valve 1, second valve 2, third valve 3, fourth valve 4 and fifth valve 5 all have a certain degree of sealing, thereby ensuring that a specific vacuum degree can be achieved when vacuuming is performed during the wax impregnation process.

[0075] The wax infiltration device also includes a heating device that can heat the wax infiltration pot A, wax infiltration pot B, wax infiltration pipeline and fifth valve 5 to a specific temperature. The specific heating device adopts equipment commonly used in the prior art, and its structure is not the inventive point of this invention, so it will not be described in detail.

[0076] like Figure 1 As shown, wax impregnation pot A contains impregnation material (wax liquid) 6, and wax impregnation pot B contains a grinding wheel 7.

[0077] The specific steps of the ceramic grinding wheel wax infiltration process are as follows:

[0078] 1) First, close valves 1, 2, 3, 4, and 5. Weigh each component according to the wax composition ratio and place it in wax infiltration pot A. Heat wax infiltration pot A, wax infiltration pot B, and valve 5 to 150°C. After the wax has completely melted, adjust the temperature of wax infiltration pot A, wax infiltration pot B, and valve 5 to 120°C and keep them warm.

[0079] 2) Place the grinding wheel 7 into the wax impregnation pot B and preheat for 20 minutes. Then open the third valve 3 to draw a vacuum until the vacuum degree in the wax impregnation pot B is -0.09MPa. Then close the third valve 3.

[0080] 3) After the vacuum and temperature meet the requirements, open the fifth valve 5. The melted wax flows from the wax infiltration pot A to the wax infiltration pot B under the action of negative pressure to carry out wax infiltration. After all the wax in the wax infiltration pot A has flowed out, close the fifth valve 5. The wax infiltration time is 15 minutes.

[0081] 4) Then, open the fourth valve 4 of the wax-coating pot B to release the negative pressure to normal pressure. At the same time, open the first valve 1 of the wax-coating pot A to evacuate to a vacuum degree of -0.09MPa. After the vacuum degree of the wax-coating pot A reaches the set value, open the fifth valve 5. The melted wax will flow back to the wax-coating pot A under the action of negative pressure. After all the wax has flowed out of the wax-coating pot B, the finished grinding wheel after wax coating can be taken out.

[0082] Furthermore, to ensure sufficient wax penetration, after wax penetration in wax penetration pot B in step 3), the fourth valve 4 can be opened to release the vacuum, the grinding wheel 7 can be removed and placed in wax penetration pot A, the fourth valve 4 can be closed, the first valve 1 can be opened to draw a vacuum until the vacuum degree in wax penetration pot A is -0.09MPa, and then the first valve 1 can be closed; the fifth valve 5 can be opened, and the melted wax can flow from wax penetration pot B to wax penetration pot A under the action of negative pressure. The same wax penetration method as the above process can be used to penetrate wax in reverse from wax penetration pot B to wax penetration pot A; in this way, the melted wax can be repeatedly operated between wax penetration pot A and wax penetration pot B under the action of negative pressure, thereby realizing cyclic wax penetration and improving the wax penetration effect.

[0083] The wax composition and process parameters of Example 1 are shown in Table 7.

[0084] Table 7 Experimental parameters of the wax infiltration process in Example 1.

[0085]

[0086] Example 2

[0087] Example 2 provides a ceramic grinding wheel wax infiltration process. The process method of Example 2 differs from that of Example 1 in that the temperature is adjusted to 150°C in step 1); the preheating time is 30 min and the vacuum degree is -0.1 MPa in step 2); the wax infiltration time is 20 min in step 3); and the vacuum degree is -0.1 MPa in step 4).

[0088] The wax composition and process parameters of Example 2 are shown in Table 8.

[0089] Table 8 Experimental parameters of the wax infiltration process in Example 2.

[0090]

[0091] Example 3

[0092] Example 3 provides a ceramic grinding wheel wax infiltration process. The process method of Example 3 differs from that of Example 1 in that the temperature is adjusted to 150°C in step 1); the preheating time is 30 min in step 2); and the wax infiltration time is 30 min in step 3).

[0093] The wax composition and process parameters of Example 3 are shown in Table 9.

[0094] Table 9 Experimental parameters of the wax infiltration process in Example 3.

[0095]

[0096] Performance testing

[0097] The grinding performance of the grinding wheel products in Examples 1-3 was tested (mainly for precision cutting of the bearing inner ring groove). The specific method is as follows:

[0098] The bearing groove grinding machine (model: 3MZY1320) from Wuxi Machine Tool Co., Ltd. was used to grind the bearing. The workpiece being ground was the bearing inner ring groove. The material was bearing steel GCr15 with a hardness of HRC58-65.

[0099] Grinding parameters: workpiece rotation speed 150 rpm, grinding wheel rotation speed 55 m / s, dressing amount 1 μm, feed rate 0.5 mm / min, finish surface roughness Ra 0.32, requiring no burns or vibration marks on the surface, good durability, and long service life. Table 10 shows a comparison of the performance of the grinding wheel products in the examples. The control group consisted of grinding wheels that had not undergone wax impregnation treatment.

[0100] Table 10 compares the performance of the grinding wheel products in the examples.

[0101]

[0102] As shown in Table 10, the roughness of the bearing groove significantly improved after impregnation, increasing from Ra0.38 to Ra0.30~0.32. The durability and service life of the grinding wheel more than doubled, and there were no burns or vibration marks on the surface. The performance indicators of the impregnated grinding wheel were superior to those of the unimpregnated grinding wheel, significantly improving grinding quality and efficiency.

[0103] The process of this invention utilizes the characteristic that wax solidifies rapidly after melting, without producing other environmentally harmful byproducts. Furthermore, the wax melting temperature generally does not exceed 150°C, making it environmentally friendly. The grinding wheel impregnation process is simple to operate and suitable for large-scale industrial application.

[0104] The above embodiments are illustrative examples of the implementation of the present invention. The implementation of the present invention is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and are included within the protection scope of the present invention.

Claims

1. A ceramic grinding wheel wax infiltration process, characterized in that, The wax infiltration device is realized by using a wax infiltration device; The wax infiltration device comprises a wax infiltration pot A, a wax infiltration pot B, and a wax infiltration pipeline capable of connecting the wax infiltration pot A and the wax infiltration pot B; The wax infiltration pot A is provided with a first valve and a second valve at the top end, and the wax infiltration pot B is provided with a third valve and a fourth valve at the top end; the wax infiltration pipeline is provided with a fifth valve; The first valve and the third valve are respectively connected to an external vacuumizing device; The wax infiltration device further comprises a heating device capable of heating the wax infiltration pot A, the wax infiltration pot B, the wax infiltration pipeline and the fifth valve to a specific temperature; The wax infiltration process of the ceramic grinding wheel comprises the following steps: 1) Firstly, the first valve, the second valve, the third valve, the fourth valve and the fifth valve are closed, and each component is weighed according to the wax liquid component distribution ratio, and then placed in the wax infiltration pot A, and the wax infiltration pot A, the wax infiltration pot B and the fifth valve are heated to 120-150 DEG C respectively to melt the wax; 2) The grinding wheel is placed in the wax infiltration pot B for preheating for 15-30 min, the third valve is opened to vacuumize the wax infiltration pot B to a vacuum degree of -0.10 to -0.09 MPa, and then the third valve is closed; 3) The fifth valve is opened, the melted wax liquid flows into the wax infiltration pot B under the action of negative pressure, and wax infiltration is carried out, and after the wax liquid in the wax infiltration pot A flows out, the fifth valve is closed; 4) Then, the fourth valve of the wax infiltration pot B is opened to release the negative pressure to normal pressure, and the first valve of the wax infiltration pot A is opened to vacuumize the wax infiltration pot A to a vacuum degree of -0.10 to -0.09 MPa; the fifth valve is opened, the melted wax liquid flows back to the wax infiltration pot A under the action of negative pressure, and after the wax liquid flows out of the wax infiltration pot B, the wax-infiltrated grinding wheel product is taken out; After the wax infiltration pot B is infiltrated in step 3), the fourth valve is opened to release the vacuum, the grinding wheel is taken out, and the grinding wheel is placed in the wax infiltration pot A, the fourth valve is closed, the first valve is opened to vacuumize the wax infiltration pot A to a vacuum degree of -0.10 to -0.09 MPa, and then the first valve is closed; the fifth valve is opened, the melted wax liquid flows into the wax infiltration pot A from the wax infiltration pot B under the action of negative pressure, and the wax infiltration is carried out in the same way as the above process, and the wax infiltration is carried out in the reverse direction from the wax infiltration pot B to the wax infiltration pot A; the melted wax liquid is repeatedly operated between the wax infiltration pot A and the wax infiltration pot B under the action of negative pressure, so that the wax infiltration is carried out in a cycle to improve the wax infiltration effect; The grinding wheel is prepared from raw materials in the following mass fractions: brown corundum 40-45%, white corundum 40-45% and ceramic binder 10-15%; The mass percentage of each component of the ceramic binder is: clay powder 45-60%, feldspar powder 35-40% and quartz powder 0-20%; In step 3), the temperature during wax infiltration should be controlled at 100-150 DEG C; The wax liquid is composed of palm wax, wood wax and a surfactant; In the composition of the wax liquid, the mass ratio of each component is: palm wax 50-80%, wood wax 18-49% and surfactant 1-2%; The surfactant is ethylenediamine oleate and oleic acid, and the mass ratio is (0.5-1.0):

1.

2. The process for impregnating the vitreous grinding wheel with the wax as claimed in claim 1, wherein, The first valve and the third valve are vacuumizing valves, and the second valve and the fourth valve are vacuum releasing valves.

3. The process for impregnating the vitrified grinding wheel with the wax as claimed in claim 1 wherein, The wax infiltration time in step 3) is 15-30 min.

4. The process for impregnating the vitreous grinding wheel with the wax as claimed in claim 1 wherein, The mass ratio of the components of the wax liquid is: 80% of palm wax, 19% of wood wax and 1% of surfactant, or 80% of palm wax, 19.5% of wood wax and 0.5% of surfactant; wherein the surfactant is ethylenediamine oleate and oleic acid with a mass ratio of 0.8:1 or 0.5:

1.

5. The process for permeating the wax into the vitrified grinding wheel as claimed in claim 1 wherein, In step 3), the wax infiltration time is 15-20 min for the grinding wheel with a diameter of less than 100 mm, and the wax infiltration time is 20-30 min for the grinding wheel with a diameter of more than 100 mm.

6. The wax-infiltrated ceramic grinding wheel prepared by the process of any one of claims 1-5.

7. Use of the impregnated ceramic grinding wheel according to claim 6 for grinding bearings, characterized in that During grinding, the workpiece rotation speed is 120-150 rpm, the grinding wheel rotation speed is 50-60 m / s, the dressing amount is 1-1.5 μm, and the feed speed is 0.5-1 mm / min. The grinding position is the bearing inner ring groove, and the material is bearing steel GCr15 with a hardness of HRC 58-65.

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