| 摘要 |
PROBLEM TO BE SOLVED: To realize an appearance inspection apparatus by which, when at least any one out of the end face, the outside-diameter face and the inside- diameter face of a cylindrical workpiece (a work) is inspected, a well visible continuous arc-shaped flaw can be detected without lowering an acceptance rate. SOLUTION: A part or the whole range (a) of a binarized image which expresses an imaged face to be inspected is scanned in the radial direction (b). Thereby, the existence of a defect in scanning lines is judged. The number of times in which the scanning lines with the detected defect appear is counted. The quality of a work is judged on the basis of the counted number of times. When a chamfered flaw, rust, a casting surface residue or the like exists on a cylindrical workpiece, the workpiece is scanned in the radial direction. When an arc-shaped scratch flaw or a concentric circle-shaped flaw, along the circumferential direction, which is generated in a working operation exists, the workpiece is scanned in the circumferential direction. Thereby, the flaw can be detected surely. |
