Transactions of Materials and Heat Treatment

Title：Surface defect detection of stamping parts based on double light pattern matching

Authors： Li Song Zhou Yatong Zhang Zhongwei Chi Yue Han Chunying

Unit： Hebei University of Technology Beijing Anshizhongdian Technology Co. Ltd.

KeyWords： stamping part surface defects detection lighting method template matching detection accuracy detection speed

ClassificationCode：TP391

year,vol(issue):pagenumber：2018,43(11):137-145

Abstract：

For the problems of low manual inspection, high false detection rate and labor intensity in the surface defects of stamping parts, based on double-shot template matching, a surface defect detection method of stamped parts was proposed. According to the different surface defect types, two different lighting patterns, such as a bottom ring light source and a top surface light source, were adopted based on the lighting effect, and the collected stamping parts images were processed by edge extraction, rotation positioning, filling, template matching, and defect extraction. The application of online inspection shows that for the scratching and crescent bump defects, good defect extraction effect is obtained by low-angle ring light source lighting, and for the rust defects, high-angle surface light source lighting method is applied. Therefore, the entire surface defect image processing method can quickly and effectively detect defects such as surface scratches, crescent moon bumps, and rust marks on the stamped parts. Detection accuracy is up to 0.134 mm2, and detection speed is up to 1.196 s. Furthermore, this method can meet the requirements of factory inspection in terms of detection speed and accuracy to greatly increase production efficiency and reduce production costs.

Funds：

河北省引进留学人员资助项目（CL201707）;教育部人文社会科学研究规划基金（15YJA630108）

李松（1994-），男，硕士研究生,E-mail：984646263@qq.com;通讯作者：周亚同（1973-），男，博士，教授，博士生导师,E-mail:zyt@hebut.edu.cn

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