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High-sensitivity small-blind-area ultrasonic detection method for bearing ring

A high-sensitivity, bearing ring technology, used in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, measurement devices, etc., can solve the problems of large blind spots and low sensitivity, and achieve accurate detection And locate, ensure the quality of inspection, improve the effect of defect control range

Pending Publication Date: 2022-03-04
AVIC HARBIN BEARING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low sensitivity and large blind area in the existing water immersion ultrasonic detection method for the detection of micro-defects in bearing rings, and to provide a high-sensitivity and small blind area ultrasonic detection method for bearing rings

Method used

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  • High-sensitivity small-blind-area ultrasonic detection method for bearing ring
  • High-sensitivity small-blind-area ultrasonic detection method for bearing ring
  • High-sensitivity small-blind-area ultrasonic detection method for bearing ring

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specific Embodiment approach 1

[0027] Specific implementation mode 1: In this implementation mode, the high-sensitivity small blind area ultrasonic detection method of the bearing ring is realized according to the following steps:

[0028] 1. Sample preparation:

[0029] Flat-bottomed hole comparison sample: The material of the flat-bottomed hole comparison sample is 8Cr4Mo4V, which is consistent with the ferrule to be tested, and the processing state and size are the same. Processing size: 6 pieces in total, the hole diameter is Φ0.4mm, and the diameter is 50.8mm. The buried depths are 1.6mm, 3.2mm, 6.4mm, 12.7mm, 25.4mm and 38.1mm, and the thicknesses are 8.0mm, 9.6mm, 12.8mm, 19.1mm, 31.8mm and 44.5mm;

[0030] Raceway flat-bottomed hole sample: take the ferrule to be inspected and make flat-bottomed holes near the surface with different buried depths. Each hole is spaced at 5mm, a total of two groups, respectively located at the center of the arc bottom of the ferrule to be inspected and 1 / 2 the distan...

specific Embodiment approach 2

[0037] Embodiment 2: This embodiment is different from Embodiment 1 in that the burrs caused by the flat-bottomed hole comparison sample in step 1 are removed during processing, and the upper and lower edges are rounded. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0038] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that the water immersion ultrasonic equipment described in step 3 adopts the Scan Master disk ring ultrasonic water immersion detection system, model LS-500, with C-scan imaging function, parameters : The detection sensitivity is Ф0.4mm-10dB equivalent flat bottom hole, and the pulse repetition frequency is 600Hz. Others are the same as in the first embodiment.

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Abstract

The invention discloses a high-sensitivity small-blind-area ultrasonic detection method for a bearing ring, and relates to a detection method for the bearing ring. The problems that an existing water immersion ultrasonic detection method is low in sensitivity and large in blind area when used for detecting the microdefects of the bearing ring are solved. The method comprises the following steps: 1, preparing a flat-bottom hole comparison sample and a raceway flat-bottom hole sample; 2, adjusting the equipment sensitivity; 3, the raceway flat-bottom hole sample is placed in a three-jaw chuck of water immersion ultrasonic equipment to be locked and centered, the whole outer diameter face of the raceway flat-bottom hole sample is detected in the mode that longitudinal waves vertically enter the outer diameter face, the probe focus hits the outer diameter face of the raceway flat-bottom hole sample, and detection data are obtained. According to the invention, the incident plane blind area of the detection ferrule is 1.5 mm, and the reflecting plane blind area is 0.8 mm, so that the full coverage of internal detection is ensured, the surface blind area of ultrasonic detection is reduced, and the defect control range is widened. According to the invention, tiny defects can be accurately detected and positioned, and the detection quality of water immersion ultrasound is ensured. The method is suitable for high-sensitivity small-blind-area ultrasonic detection of the bearing ring.

Description

technical field [0001] The invention relates to a detection method of a bearing ring. Background technique [0002] Aviation main shaft bearing is an important transmission component of aero-engine, and its working reliability has an irreplaceable impact on the safety of aviation equipment. The data shows that in all kinds of major mechanical accidents of aviation machinery, the failure rate of aviation bearings accounts for a large proportion. Therefore, for the safety detection of aviation bearings, it is of great practical significance to ensure the failure rate of aviation equipment and reduce aviation accidents. The ring is an important part of the bearing. With the development and mass production of the third and fourth generation aircraft bearings, higher requirements are put forward for reliability, quality, thrust-to-weight ratio, working conditions, and service life. Therefore, The defect control of bearing materials is also becoming more and more stringent. At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/06G01N29/44
CPCG01N29/069G01N29/4454G01N2291/0289
Inventor 王欢张凯胜孙慧霖冯东伟尚耀文李晓天
Owner AVIC HARBIN BEARING
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