Device and method for automatically detecting defects of cylinder liners by aid of X-rays

Abstract

The invention relates to X-ray nondestructive detection technologies, in particular to a device and a method for automatically detecting defects of cylinder liners by the aid of X-rays. The device and the method have the advantages that the technical problem of inaccurate detection results due to the fact that defects of products cannot be accurately reflected by images acquired when components such as cylinder liners with tubular structures are detected by the aid of rays at present can be solved by the aid of the device and the method; an imaging process is a single-wall imaging process implemented by the aid of linear-array type detectors arranged inside the cylinder liners, images of single walls, which are positioned between ray sources and the detectors and are close to imaging surfaces of the detectors, of the cylinder liners are vertically formed by the aid of image data of the cylinder liners, accordingly, the imaging process is essentially equivalent to a mode in which the cylinder liners are spread to form rectangular panels and then the rectangular panels are scanned by the linear-array type detectors columns by columns to form the images, and the shortcoming of sine effects due to arc lengths can be overcome; the resolution of the images can be obviously improved by the single-wall imaging process as compared with double-layer wall imaging, and irregular cross imaging interference of threads of front and rear walls during double-layer wall imaging can be effectively prevented under the condition that the cylinder liners are provided with external threads.

Description

technical field [0001] The invention relates to X-ray non-destructive detection technology, in particular to an X-ray automatic detection device and method for cylinder liner defects. Background technique [0002] As an important part of the automobile engine, the cylinder liner has a large production batch and high quality requirements. However, in the process of casting and machining, due to the internal stress and clamping force of the material itself, it is easy to cause microscopic cracks and pores and sand holes formed during the casting process. If these defects appear in the engine under high temperature and high pressure working conditions, it is easy to cause the failure of the engine and lead to safety accidents. Therefore, it is particularly important to quickly, efficiently and non-destructively detect large quantities of cylinder liners. [0003] The current relatively advanced detection methods mainly include eddy current detection method and X-ray detection ...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides an X-ray automatic detection of cylinder liner defects in order to solve the technical problem that the images collected during the ray detection of cylinder liners and other parts with cylindrical structures cannot accurately reflect product defects and thus lead to inaccurate detection results. Apparatus and method

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