INSPECTING DEVICE FOR SURFACE OF CAM

摘要

PURPOSE:To prevent a small defect from being taken for a large defect with the addition thereof by dividing the surface of a cam to be inspected into zones each roughly equal to a minimum diameter of a defect not permissible to inspect defects separately at intervals of adjacent two zones. CONSTITUTION:A zone setting means 4b divides a surface image of a cam S to be inspected taken with a camera 4 horizontally or vertically to be set as a plurality of zones with a zone range roughly equal to a minimum diameter of a defect not permissible. An adjacent two zone extraction means 4c extracts two zones adjacent to each other sequentially in the zones. An inspection means 4d calculates an area of a defect in two zones extracted to judge whether it is within a reference value or not. The above judgement is performed for all of adjacent two zones and when even only one of the results is above a reference value, the surface of a cam is determined to be defective.