As one of the most basic and most important processes of mechanical processing, counterbores often have defects such as skew corners and inconsistent dimensions. How to quickly detect the countersink defects of the processing equipments is an urgent problem to be solved by the mechanical manufacturing enterprise. The monocular vision-based detection method replaces the traditional artificial detection method with a series of advantages such as high efficiency, strong stability, high accuracy and high degree of automation, and becomes an important research direction in the field of mechanical manufacturing automation. In this paper, the technology of visual measurement for the counterbores is put forward, which mainly uses the laser sensor as the acquisition device, carries out the counterbores image processing through the industrial computer, and adopts the numerical control machine system to display and preserve the measurement results. It has been tested and verified that the counterbore inspection system runs smoothly and meets the needs of the current enterprises.
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