Comprehensive high-performance bearing grinding burn inspection and judgment method

A grinding burn and determination method technology, applied in the direction of material magnetic variable, etc., can solve the problem of low detection rate of bearing raceway grinding burn, achieve production quality and use reliability guarantee, improve detection rate, and promote production The effect of technical ability

Inactive Publication Date: 2017-10-20
AVIC HARBIN BEARING
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of low detection rate of bearing raceway grinding burns, the present invention further proposes a comprehensive inspection and judgment method for high-performance bearing grinding burns

Method used

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  • Comprehensive high-performance bearing grinding burn inspection and judgment method

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine figure 1 To illustrate this embodiment, a high-performance bearing grinding burn comprehensive inspection and determination method described in this embodiment is realized through the following steps:

[0016] Step 1. In the production process, use single acid instead of mixed acid to inspect the outer ring of the bearing;

[0017] Step 2. Develop burn atlas;

[0018] Step 3: Carry out grinding burn inspection on the finished parts through the magnetoelastic instrument;

[0019] Step four, physical and chemical analysis and judgment.

[0020] In step 4, when both the pickling inspection and the magnetoelasticity test are judged to be abnormal, and further understanding of the degree of burn is required, the sample can also be cut and observed through a metallographic microscope. There are obvious differences, the bright white color is the quenching burn, and the black is the tempering burn. Usually the burn layer has a certai...

specific Embodiment approach 2

[0021] Specific implementation mode two: combination figure 1 To illustrate this embodiment, in step 1 of the method for comprehensive inspection and determination of high-performance bearing grinding burns described in this embodiment, the steps of using single acid instead of mixed acid in the production process to inspect the bearing steel ring are as follows:

[0022] Step 1 (1), degreasing: use a mixed solution with anhydrous carbonic acid content of 2.5-3.5%, trisodium phosphate content of 2.5-3.5%, sodium hydroxide content of 1-2%, and water glass content of 0.2-0.3% Clean the parts, the cleaning temperature is 75 ℃ ~ 85 ℃, and the cleaning time is 3 minutes;

[0023] Step 1 (2), continuous water film inspection: make the surface of the part completely wet, and within 30 seconds of visual observation, it is qualified if there is no water film on the surface of the part;

[0024] Step 1 (3), hydrochloric acid impregnation: impregnate the parts with a hydrochloric acid s...

specific Embodiment approach 3

[0030] Specific implementation method three: the burn atlas is formulated in step 2 to facilitate comparison and identification during the inspection process, sort out and classify the appearance, degree, and distribution position of the ground burnt parts, and formulate the atlas of pickled burnt parts, and take parts after pickling Compare with the map topography to ensure that the burned parts are effectively identified and avoid misjudgments and missed judgments.

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Abstract

The invention relates to an inspection and judgment method, and in particular to a comprehensive high-performance bearing grinding burn inspection and judgment method. The invention is intended to solve the problem that the bearing track grinding burn inspection rate is low. The specific steps of the comprehensive high-performance bearing grinding burn inspection and judgment method are as follows: (Step 1) in the process of production, single acid is used for substituting for mixed acid to carry out bearing rim inspection; (Step 2) a burn map is made; (Step 3) a magnetoelastic instrument carries out grinding burn inspection on a finished part; (Step 4) physical and chemical analysis and judgment are carried out. The comprehensive high-performance bearing grinding burn inspection and judgment method belongs to thee field of bearing quality inspection.

Description

technical field [0001] The invention relates to an inspection and judgment method, in particular to a comprehensive inspection and judgment method for high-performance bearing grinding burns, and belongs to the field of bearing quality inspection. Background technique [0002] N4 steel is currently the preferred material for high-performance aviation bearings in China. Because the strength, hardness and high temperature resistance of this material are stronger than that of ordinary bearing steel ZGCr15, since 2008, with the increase in domestic aviation bearing demand, the use of this material Bearing types and quantities are also increasing. [0003] However, due to domestic manufacturers' limited grasp of the processing performance of this material, the burn problem caused by the raceway grinding process has not been fundamentally resolved. Therefore, in the subsequent inspection process, the ground burnt parts will be effectively inspected by inspection control means It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82
CPCG01N27/82
Inventor 赵燕罗志刚兴长喜阚悦铭张凯胜
Owner AVIC HARBIN BEARING
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