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System and method for radiographic detection of casting point defect depth

A defect depth, ray detection technology, applied in the field of detection, can solve the problems of inaccurate positioning, large detection influence, easy formation of diffraction and diffraction, etc., to avoid inaccurate depth positioning, improve the success rate of repair, and improve the efficiency of repair. Effect

Active Publication Date: 2018-03-23
KOCEL STEEL
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  • Application Information

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Problems solved by technology

However, the size, nature and inclusions of point-like defects have a great influence on the detection, and when the defect size is small, it is easy to form diffraction and diffraction, resulting in the inaccurate positioning

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  • System and method for radiographic detection of casting point defect depth
  • System and method for radiographic detection of casting point defect depth
  • System and method for radiographic detection of casting point defect depth

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Embodiment Construction

[0022] The invention provides a method for detecting the depth of point-like defects in castings by radiation. The method uses the geometric distribution principle of multi-angle exposure projection of rays to theoretically calculate the depth of the defect from the surface of the workpiece, and accurately determine the depth of the defect. The method for radiographically detecting the depth of point-like defects in castings comprises the following steps:

[0023] Step S301, setting the first irradiation position and the second irradiation position on one side of the casting, the distance from the first irradiation position to the casting is equal to the distance from the second irradiation position to the casting, and the first irradiation position is opposite to the position to be measured on the casting Yes, the distance between the first irradiation position and the second irradiation position is H 1 , the distance from the first irradiation position to the position to be ...

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Abstract

A method for detecting the depth of point-like defects in castings by ray, which uses the principle of geometric relationship between two projections formed by oblique ray transillumination, and calculates the distance T1 or T2 between the defect and the surface of the workpiece. By implementing this defect location method, It effectively avoids inaccurate depth positioning of point defects due to diffraction and diffraction of ultrasonic detection, so that the success rate of point defect repairs increases linearly, greatly improves repair efficiency, and saves repair costs. The invention also provides a system for detecting the depth of point defects in castings by radiation.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a system and method for radiographic detection of the depth of point-like defects in castings. Background technique [0002] At present, the application fields of large-scale steel castings are becoming wider and wider. Many parts need to withstand special conditions such as temperature and pressure in the later assembly and service. Therefore, in order to ensure the quality of steel castings, the key parts of castings must be inspected by radiographs. Radiographic inspection is limited by its detection principle and can only expose the two-dimensional shape of the defect projection. , in actual production, in order to effectively remove casting defects, it must be positioned in the depth direction by means of ultrasonic testing. However, the size, nature and inclusions of point-like defects have a great influence on the detection, and when the defect size is small, it is easy...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/04G01B15/00
Inventor 高阳拓凌玺
Owner KOCEL STEEL