Grinding fluid for grinding balls and preparation method of grinding fluid

Abstract

A grinding fluid for grinding balls comprises the following components in percentage by mass: 1-5% of abrasive particles, 1-5% of a surfactant, 1-5% of a dispersant, 2-6% of a thickener, 1-2% of a lubricant, 0.05-0.3% of a pH regulator, 0.5-3% of an antioxidant and the balance of base oil, the components are fully stirred and dispersed under an ultrasonic condition to prepare a polishing solution, the pH value of the prepared polishing solution is 8-8.5, and the viscosity of the prepared polishing solution is 30-35 cst. Compared with the prior art, the prepared grinding fluid is good in stability and low in price, the problem of oxidative deterioration of the grinding fluid is solved by adding a certain amount of antioxidant, and the diamond micro powder serving as a grinding medium can be uniformly dispersed in the grinding fluid and is not prone to precipitation.

Description

Technical Field

[0001] This invention relates to the field of ball bearing grinding, specifically to a grinding fluid for grinding balls and its preparation method. Background Technology

[0002] Bearings consist of bearing rings and balls. The balls can be metal balls, such as steel balls, or non-metal balls, such as ceramic balls. Ceramic balls have very high hardness, generally HV higher than 1440, and excellent wear resistance, which can meet the requirements of bearings under special working conditions. In order to meet the requirements, ceramic balls need to be ground. The existing ceramic ball grinding fluid uses PAO (polyalphaolefin) as the base oil, which is too expensive and easily oxidizes and deteriorates, forming a deteriorated layer that adheres to the equipment and is difficult to clean. In addition, the existing grinding fluid has poor suspension of grinding media, and abrasive particles are easy to deposit and agglomerate in the grinding fluid. Uneven distribution of grinding media will result in low grinding efficiency and inconsistent grinding efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a grinding fluid for grinding balls and a method for preparing the same, in order to address the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A grinding fluid for grinding balls comprises, by mass percentage, the following components: 1-5% abrasive particles, 1-5% surfactant, 1-5% dispersant, 2-6% thickener, 1-2% lubricant, 0.05-0.3% pH adjuster, 0.5-3% antioxidant, and the remainder being base oil.

[0005] The abrasive particles are made of diamond micron powder.

[0006] The surfactant is an alkylphenol polyoxyethylene ether or a fatty alcohol polyoxyethylene ether.

[0007] The dispersant used is polyethylene glycol-6000 oleate.

[0008] The thickener is propylene glycol monododecanoate.

[0009] The lubricant used is glyceryl tristearate.

[0010] The pH adjuster is one of octadecylamine, lauric acid, or potassium hydroxide.

[0011] The antioxidant is N-phenyl-α-naphthylamine.

[0012] The base oil is a mixture of white oil and castor oil, and diisooctyl sebacate is added to the base oil to adjust the viscosity index.

[0013] A method for preparing a grinding ball bearing slurry includes the following steps: Step 1: Prepare the base oil by thoroughly mixing white oil and castor oil in a 2:3 ratio, and add 5-15% diisooctyl sebacate to adjust the viscosity index of the base oil. Step 2: Dry the diamond micro powder at 105-110℃ for later use; Step 3: Add alkylphenol polyoxyethylene ether or fatty alcohol polyoxyethylene ether to the diamond micro powder and mix thoroughly to wet the powder surface. Then add the prepared base oil and mix thoroughly. Step 4: Add polyethylene glycol-6000 to the solution prepared in step 3 and mix thoroughly. Then add thickener, lubricant, antioxidant and pH adjuster in sequence. Stir and disperse under ultrasonic conditions to prepare polishing liquid. The prepared polishing liquid has a pH of 8~8.5 and a viscosity of 30~35 cst.

[0014] Compared with the prior art, the present invention provides a grinding fluid for grinding balls and its preparation method. The prepared grinding fluid has good stability and low price. In addition, a certain amount of antioxidant is added to solve the problem of oxidation and deterioration of the grinding fluid. Moreover, diamond micro powder as a grinding medium can be dispersed relatively evenly in the grinding fluid and is not easy to precipitate. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below.

[0016] Taking the grinding of Φ1.588mm ceramic balls as an example. Example 1

[0017] To prepare the base oil, white oil and castor oil were thoroughly mixed in a 2:3 ratio. 6% diisooctyl sebacate was added, and 4% diamond micron powder was dried at 110℃. 3% alkylphenol polyoxyethylene ether was added to the dried diamond micron powder and thoroughly mixed to wet the powder surface. The prepared base oil was then added and thoroughly mixed. 4% polyethylene glycol-6000 was added to the prepared solution and thoroughly mixed. Then, 3% propylene glycol monododecanoate, 1% glyceryl tristearate, 0.1% octadecylamine, and 1.5% N-phenyl-α-naphthylamine were added sequentially. The mixture was stirred and dispersed under ultrasonic conditions to prepare a polishing slurry. The prepared polishing slurry had a pH of 8.3 and a viscosity of 31 cSt. Example 2

[0018] To prepare the base oil, white oil and castor oil were thoroughly mixed in a 2:3 ratio. 10% diisooctyl sebacate was added, and 5% diamond micro powder was dried at 110℃. 4% alkylphenol polyoxyethylene ether was added to the dried diamond micro powder and thoroughly mixed to wet the powder surface. The prepared base oil was then added and thoroughly mixed. 4% polyethylene glycol-6000 was added to the prepared solution and thoroughly mixed. 4% propylene glycol monododecanoate, 1.5% glyceryl tristearate, 0.15% lauric acid, and 2% N-phenyl-α-naphthylamine were then added sequentially and dispersed under ultrasonic conditions to prepare a polishing slurry. The prepared polishing slurry had a pH of 8.1 and a viscosity of 33 cSt. Example 3

[0019] To prepare the base oil, white oil and castor oil were thoroughly mixed in a 2:3 ratio. 12% diisooctyl sebacate was added, and 4% diamond micro powder was dried at 110℃. 4% fatty alcohol polyoxyethylene ether was added to the dried diamond micro powder and thoroughly mixed to wet the powder surface. The prepared base oil was then added and thoroughly mixed. 5% polyethylene glycol-6000 was added to the prepared solution and thoroughly mixed. 4% propylene glycol monododecanoate, 2% glyceryl tristearate, 0.2% potassium hydroxide, and 2.5% N-phenyl-α-naphthylamine were then added sequentially and stirred and dispersed under ultrasonic conditions to prepare a polishing slurry. The prepared polishing slurry had a pH of 8.4 and a viscosity of 34 cSt.

[0020] Comparative Example 1 Grinding was performed using commercially available TC-200 grinding fluid.

[0021] As shown in Table 1, the performance results of the embodiments and comparative examples are as follows: Example 1 Example 2 Example 3 Comparative Example 1 Diameter variation (per grain) / unit μm ＜0.013 ＜0.015 ＜0.012 0.018＞ Diameter variation (batch) / unit μm ＜0.020 ＜0.022 ＜0.019 0.020＞ Spherical error / unit μm ＜0.16 ＜0.12 ＜0.11 0..15＞ Surface roughness / unit μm ＜0.016 ＜0.012 ＜0.012 0.019＞ The grinding slurry prepared in this invention uses a mixture of kerosene and castor oil in a mass ratio of 2:3 as the base oil, which greatly increases its oxidation stability. Furthermore, the addition of a certain amount of antioxidant addresses the problem of oxidation and deterioration of the grinding slurry. Polyoxyethylene nonionic surfactants effectively disperse nanodiamond powder in the oil, ensuring that the diamond powder, as a grinding medium, is evenly dispersed in the grinding slurry and does not easily precipitate. The polyethylene glycol portion of the polyethylene glycol oleate molecule has a certain degree of hydrophilicity, while the oleate portion is lipophilic. In kerosene, the lipophilic portion plays a dominant role, thus providing them with a certain degree of solubility in kerosene, which helps to disperse and stabilize other substances in the kerosene system.

[0022] This invention is not limited to the embodiments described. Those skilled in the art can make some modifications or changes without departing from the spirit and scope of this invention. Therefore, the scope of protection of this invention is defined by the claims.

Claims

1. A grinding fluid for grinding balls, characterized in that: The components are listed as a percentage by mass: 1-5% abrasive, 1-5% surfactant, 1-5% dispersant, 2-6% thickener, 1-2% lubricant, 0.05-0.3% pH adjuster, 0.5-3% antioxidant, and the remainder is base oil.

2. The grinding ball bearing according to claim 1, characterized in that: The abrasive particles are made of diamond micron powder.

3. The grinding ball bearing according to claim 1, characterized in that: The surfactant is an alkylphenol polyoxyethylene ether or a fatty alcohol polyoxyethylene ether.

4. The grinding ball bearing according to claim 1, characterized in that: The dispersant used is polyethylene glycol-6000 oleate.

5. A grinding ball bearing according to claim 1, characterized in that: The thickener is propylene glycol monododecanoate.

6. A grinding ball bearing according to claim 1, characterized in that: The lubricant used is glyceryl tristearate.

7. A grinding ball bearing according to claim 1, characterized in that: The pH adjuster is one of octadecylamine, lauric acid, or potassium hydroxide.

8. A grinding ball bearing according to claim 1, characterized in that: The antioxidant used is N-phenyl-α-naphthylamine.

9. A grinding ball according to claim 1, characterized in that: The base oil is a mixture of white oil and castor oil, with diisooctyl sebacate added to adjust the viscosity index.

10. A method for preparing a grinding ball bearing slurry, characterized in that: Includes the following steps: Step 1: Prepare the base oil by thoroughly mixing white oil and castor oil in a 2:3 ratio, and add 5-15% diisooctyl sebacate to adjust the viscosity index of the base oil. Step 2: Dry the diamond micro powder at 105-110℃ for later use; Step 3: Add alkylphenol polyoxyethylene ether or fatty alcohol polyoxyethylene ether to the diamond micro powder and mix thoroughly to wet the powder surface. Then add the prepared base oil and mix thoroughly. Step 4: Add polyethylene glycol-6000 to the solution prepared in step 3 and mix thoroughly. Then add thickener, lubricant, antioxidant and pH adjuster in sequence. Stir and disperse under ultrasonic conditions to prepare polishing liquid. The prepared polishing liquid has a pH of 8~8.5 and a viscosity of 30~35 cst.