Abrasive paste for stainless steel small-clearance knuckle bearing as well as preparation method and use method of abrasive paste

Abstract

The invention discloses a grinding paste for a stainless steel small-clearance knuckle bearing, which comprises the following components in percentage by mass: 40-50% of molybdenum disulfide, 35-45% of diamond grinding powder and 10-15% of 7254 type aviation lubricating oil, and the sum of the mass percentages is 100%. The invention further discloses a preparation method of the abrasive paste for the stainless steel small-clearance knuckle bearing. The invention further discloses a using method of the abrasive paste for the stainless steel small-clearance knuckle bearing. According to the grinding paste for the stainless steel small-clearance knuckle bearing and the preparation and use method thereof, the problem that after the bearing is installed and closed up, an outer ring of the bearing deforms under the action of closing-up force, an inner ring is extruded, and consequently clamping stagnation and locking occur after the bearing is installed and closed up is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing grinding, and in particular relates to a grinding paste for stainless steel small-clearance spherical bearings. The invention also relates to the preparation of the grinding paste for stainless steel small-clearance spherical bearings and a method for using the grinding paste. Background Art

[0002] During the development of the company, the no-load starting torque value of stainless steel small-clearance spherical bearings after installation and fixation easily exceeds the allowable requirements. In order to ensure that the no-load starting torque value of the bearings after installation and fixation meets the standard requirements, grinding is carried out in accordance with the requirements of HB0-37 "Installation and Fixing of Bearings". However, since the material of stainless steel bearings is softer than bearing steel, and the outer ring of the bearing and the spherical inner ring are made of the same material and have a small clearance, the outer ring of the bearing is deformed by the closing force after the bearing is installed and closed, squeezing the inner ring, resulting in the phenomenon of stagnation and locking after the bearing is installed and closed; at the same time, the thermal expansion coefficient of stainless steel itself is large. During the grinding process, due to the small gap between the inner and outer rings of the bearing, the heat generated is not easy to dissipate quickly, causing the bearing to expand and lock. Summary of the invention

[0003] The first purpose of the present invention is to provide a grinding paste for stainless steel small-clearance spherical bearings, which solves the problem that the outer ring of the bearing is deformed by the closing force after the bearing is installed and closed, squeezing the inner ring and causing the bearing to get stuck and locked after the bearing is installed and closed.

[0004] The second object of the present invention is to provide a method for preparing a grinding paste for stainless steel small clearance spherical bearings.

[0005] A third object of the present invention is to provide a method for using the grinding paste for stainless steel small clearance spherical bearings.

[0006] The first technical solution adopted by the present invention is that the grinding paste for stainless steel small clearance spherical bearings is composed of the following components: 40%-50% molybdenum disulfide, 35%-45% diamond grinding powder and 10%-15% 7254 aviation lubricating oil, and the sum of the above mass percentages is 100%.

[0007] The present invention is also characterized in that:

[0008] The mesh size of diamond grinding powder is 800 mesh to 2300 mesh.

[0009] The second technical solution adopted by the present invention is a method for preparing a grinding paste for stainless steel small clearance spherical bearings, which specifically comprises the following steps:

[0010] Step 1, select 40%-50% of molybdenum disulfide, 35%-45% of diamond grinding powder and 10%-15% of 7254 aviation lubricating oil;

[0011] Step 2: Molybdenum disulfide, diamond abrasive powder and 7254 aviation lubricating oil are stirred and mixed to prepare abrasive paste.

[0012] The present invention is also characterized in that:

[0013] The mesh size of diamond grinding powder is 800 mesh to 2300 mesh.

[0014] The third technical solution adopted by the present invention is a method for using the grinding paste for stainless steel small clearance spherical bearings, which specifically comprises the following steps:

[0015] S1. Fix the bearing on the bearing grinding and positioning fixture;

[0016] S2. Apply the grinding paste evenly to the clearance between the inner and outer rings of the bearing;

[0017] S3. Fix the grinding rod on the inner ring of the bearing, and drive the inner ring of the bearing to rotate by rotating the grinding rod to grind the bearing.

[0018] The present invention is also characterized in that:

[0019] The grinding speed is 15r / min~80r / min.

[0020] The grinding time is 1min to 5min.

[0021] The beneficial effects of the present invention are:

[0022] The invention discloses a grinding paste for a stainless steel small-clearance spherical bearing, a preparation method thereof and a use method thereof. When the bearing is installed and fixed, the mixed molybdenum disulfide, diamond grinding powder and 7254 aviation lubricating oil are evenly applied to the clearances of the inner and outer rings of the bearing, and the inner ring of the bearing is driven to rotate by a grinding rod to grind the bearing. The grinding process is divided into rough grinding, medium grinding and fine grinding processes, thereby achieving improvement in the labor intensity of bearing grinding and improvement in the bearing grinding quality, and avoiding deformation of the outer ring of the bearing due to the closing force after the bearing is installed and closed, and squeezing the inner ring, thereby causing a stuck and locked phenomenon after the bearing is installed and closed. The method has strong promotion and implementation properties, is applicable to various spherical bearing grinding processes, improves the physical quality of the bearing after grinding, and can be widely used in the installation and fixation of spherical bearings in industries such as aviation, aerospace, automobiles, and ships. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific implementation modes.

[0024] Example 1

[0025] The grinding paste for stainless steel small clearance spherical bearings provided in this embodiment is composed of the following components: 40%-50% molybdenum disulfide, 35%-45% diamond grinding powder and 10%-15% 7254 aviation lubricating oil, and the sum of the above mass percentages is 100%.

[0026] Example 2

[0027] The grinding paste for stainless steel small clearance spherical bearings provided in this embodiment is composed of the following components: 40%-50% molybdenum disulfide, 35%-45% diamond grinding powder and 10%-15% 7254 aviation lubricant, the sum of the above mass percentages is 100%; the mesh size of the diamond grinding powder is 800 mesh to 2300 mesh.

[0028] Example 3

[0029] The method for preparing the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0030] Step 1, select 40%-50% of molybdenum disulfide, 35%-45% of diamond grinding powder and 10%-15% of 7254 aviation lubricating oil;

[0031] Step 2: Molybdenum disulfide, diamond abrasive powder and 7254 aviation lubricating oil are stirred and mixed to prepare abrasive paste.

[0032] Example 4

[0033] The method for preparing the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0034] Step 1, select 40%-50% of molybdenum disulfide, 35%-45% of diamond grinding powder and 10%-15% of 7254 aviation lubricating oil;

[0035] Step 2, mixing molybdenum disulfide, diamond abrasive powder and 7254 aviation lubricating oil to prepare abrasive paste;

[0036] The mesh size of diamond grinding powder is 800 mesh to 2300 mesh.

[0037] Example 5

[0038] The method for preparing the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0039] Step 1, select 50% of molybdenum disulfide, 35% of diamond grinding powder and 15% of 7254 aviation lubricating oil;

[0040] Step 2, mixing molybdenum disulfide, diamond abrasive powder and 7254 aviation lubricating oil to prepare abrasive paste;

[0041] The mesh size of diamond grinding powder is 1340 mesh to 1800 mesh.

[0042] Example 6

[0043] The method for preparing the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0044] Step 1, select 47.5% of molybdenum disulfide, 40% of diamond grinding powder and 12.5% ​​of 7254 aviation lubricating oil;

[0045] Step 2, mixing molybdenum disulfide, diamond abrasive powder and 7254 aviation lubricating oil to prepare abrasive paste;

[0046] The mesh size of diamond grinding powder is 800-1000 mesh.

[0047] Example 7

[0048] The method for preparing the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0049] Step 1, select 45% of molybdenum disulfide, 45% of diamond grinding powder and 10% of 7254 aviation lubricating oil;

[0050] Step 2, mixing molybdenum disulfide, diamond abrasive powder and 7254 aviation lubricating oil to prepare abrasive paste;

[0051] The mesh size of diamond grinding powder is 2000 mesh to 3000 mesh.

[0052] Example 8

[0053] The method for using the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0054] S1. Fix the bearing on the bearing grinding and positioning fixture;

[0055] S2, evenly apply the abrasive paste prepared in Example 5 to the clearance between the inner and outer rings of the bearing;

[0056] S3. Fix the grinding rod on the inner ring of the bearing, and drive the inner ring of the bearing to rotate by rotating the grinding rod to grind the bearing; the grinding process is a rough grinding process, the grinding speed is 15r / min~25r / min; the grinding time is 1min~1.5min.

[0057] Example 9

[0058] The method for using the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0059] S1. Fix the bearing on the bearing grinding and positioning fixture;

[0060] S2, evenly apply the abrasive paste prepared in Example 6 to the clearance between the inner and outer rings of the bearing;

[0061] S3. Fix the grinding rod on the inner ring of the bearing, and drive the inner ring of the bearing to rotate by rotating the grinding rod to grind the bearing; the grinding process is a medium grinding process, the grinding speed is 35r / min~50r / min; the grinding time is 2.5min~3min.

[0062] Example 10

[0063] The method for using the grinding paste for stainless steel small clearance spherical bearings provided in this embodiment specifically comprises the following steps:

[0064] S1. Fix the bearing on the bearing grinding and positioning fixture;

[0065] S2, evenly apply the abrasive paste prepared in Example 7 to the clearance between the inner and outer rings of the bearing;

[0066] S3. Fix the grinding rod on the inner ring of the bearing, and drive the inner ring of the bearing to rotate by rotating the grinding rod to grind the bearing; the grinding process is a fine grinding process, the grinding speed is 60r / min~80r / min; the grinding time is 3.5min~5min.

Claims

1. Abrasive paste for stainless steel small clearance spherical bearings, characterized in that: The invention is composed of the following components: 40%-50% of molybdenum disulfide, 35%-45% of diamond grinding powder and 10%-15% of 7254 aviation lubricating oil, and the sum of the above mass percentages is 100%.

2. The grinding paste for stainless steel small clearance spherical bearings according to claim 1, characterized in that: The mesh number of the diamond grinding powder is 800 mesh to 2300 mesh.

3. The method for preparing the grinding paste for stainless steel small clearance spherical bearings according to claim 2, characterized in that: The specific steps include: Step 1, select 40%-50% of molybdenum disulfide, 35%-45% of diamond grinding powder and 10%-15% of 7254 aviation lubricating oil; Step 2: Molybdenum disulfide, diamond abrasive powder and 7254 aviation lubricating oil are stirred and mixed to prepare abrasive paste.

4. The method for preparing the grinding paste for stainless steel small clearance spherical bearings according to claim 3, characterized in that: The mesh number of the diamond grinding powder is 800 mesh to 2300 mesh.

5. The method for using the grinding paste for stainless steel small clearance spherical bearings according to claim 4, characterized in that: The specific steps include: S1. Fix the bearing on the bearing grinding and positioning fixture; S2. Apply the grinding paste evenly to the clearance between the inner and outer rings of the bearing; S3. Fix the grinding rod on the inner ring of the bearing, and drive the inner ring of the bearing to rotate by rotating the grinding rod to grind the bearing.

6. The method for using the grinding paste for stainless steel small clearance spherical bearings according to claim 5, characterized in that: The grinding speed is 15 r / min to 80 r / min.

7. The method for using the grinding paste for stainless steel small clearance spherical bearings according to claim 5, characterized in that: The grinding time is 1 min to 5 min.