METHOD AND APPARATUS OF SURFACE FAILURE INSPECTION OF CIRCULAR MEMBER

摘要

PURPOSE:To enable optical inspection of surface failure without contacting and optically, by irradiating an inspecting light deflected and scanned on a cone, while rotating a circular member, receiving the regular reflected light and converting it into an electric signal, and processing it electrically. CONSTITUTION:A circular member 10 such as rubber cup for brake cylinder is supplied to an inspection section in the sequentially specified mode, and the inspecting light deflected and scanned is irradiated to cone surfaces 10a, 10b, while rotating it. Further, the regular reflected light from the cone surfaces 10a, 10b is received and it is converted into an electric signal, and the signal is processed electrically and the signal corresponding to a failure on the surface is picked up, the propriety of the member 10 is decided basing on the picked up signal, allowing to make continuous selection. For example, a member 10 is located on a rotating stand 18 with rotation, a parallel light from a deflected scanning light source 110 using a gaseous laser 112 is irradiated, and the variance of an outut signal of photoelectric detectors 54, 56 can be detected at a failure detecting circuit 108.