Ultrasonic non destructive detection equipment and method for internal coating stress induced defect

A stress-induced, non-destructive testing technology, applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, testing material strength using stable tension/pressure, measuring devices, etc., can solve the reliability and safety effects of remanufactured products, coating Insufficient combination of layer and substrate, inability to perform non-destructive testing, etc., to achieve the effect of short measurement time, easy expansion, and improved reliability and stability

Inactive Publication Date: 2006-06-28
DALIAN MARITIME UNIVERSITY
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the internal hole processing, especially the possible defects of the inner hole coating obtained by remanufacturing, the insufficient bonding between the coating and the substrate, and the internal stress of the coating lead to cracks in the working state, etc., these defects are harmful to the work of remanufactured products. have an important impact on the reliability and safety of
However, these problems cannot be detected non-destructively by traditional detection methods.

Method used

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  • Ultrasonic non destructive detection equipment and method for internal coating stress induced defect
  • Ultrasonic non destructive detection equipment and method for internal coating stress induced defect

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Embodiment Construction

[0022] The outer diameter of nut 1 is 40mm, the inner hole is M16mm thread, and the thread of nut 1 is matched with the thread on the top of elastic screw 8;

[0023] The outer diameter of the connection between the lower part of the nut 1 and the disc spring 2 with an outer diameter of 56mm, an inner diameter of 28.5mm, a wall thickness of 3mm, a height of 4.3mm, a maximum displacement of 1.3mm, and a maximum load of 11400N is 28.5mm. The height of the boss is 5mm;

[0024] The outer diameter of the intermediate flange of the positioning sleeve 3 is 35mm, the thickness is 5mm, the diameter of the middle hole is 16mm, the outer diameters of the upper and lower connecting parts are 28.5mm and 24mm respectively, and the height of the boss of the upper and lower connecting parts is 5mm.

[0025] The outer diameter of a pair of equivalent disc levers 4 is 96mm, the inner diameter is 24mm, the thickness t=3mm, and the bottom angle θ=30 degrees; starting from the outer circle, the d...

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PUM

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Abstract

A method for nondestructively detecting defect induced by internal hole coated layer stress with ultrasonic wave includes fixing ultrasonic wave transducer on frictional material, generating ultrasonic wave signal if defect is occurred on internal hole surface coated layer when elastic ¿C radial loading unit is expanded and acted on internal hole; as the same, also generating ultrasonic wave signal if crack caused by coated layer internal stress is occurred under operation state because of insufficient combination between coated layer and base body when said unit is expanded and acted on internal hole.

Description

technical field [0001] The invention belongs to the technical field of radial load application and ultrasonic integrated detection of defects of inner hole parts. Background technique [0002] At present, the internal hole processing, especially the possible defects of the inner hole coating obtained by remanufacturing, the insufficient bonding between the coating and the substrate, and the internal stress of the coating lead to cracks in the working state, etc., these defects are harmful to the work of remanufactured products. Both reliability and security have a significant impact. However, these problems cannot be detected non-destructively by traditional detection methods. The present invention utilizes the elastic radial loading technique to firstly make the inner hole receive a sufficiently large expansion stress, and superimposes tangential movement to induce defects in the coating, and at the same time uses an ultrasonic sensor to detect the information of crack gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04G01N3/12G01N29/04
Inventor 徐久军林炳凤
Owner DALIAN MARITIME UNIVERSITY
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