| 摘要 |
PROBLEM TO BE SOLVED: To provide a processing machine and a grinding wheel outer peripheral edge detection method capable of surely preventing a stain from sticking to a light projection surface and a light receiving surface of an optical sensor used for detecting an outer peripheral edge of a rotary grinding wheel, more than usual.SOLUTION: A shutter 26 is closed, and injection of water from a water injection port 20 is started. Processing such as cutting and grinding by a rotary grinding wheel 7 is executed in a state of submerging a light projection surface 28 of a light emission part 17 and a light receiving surface 29 of a light receiving part 18. When the processing is finished, dressing of the rotary grinding wheel 7 is executed. When the processing and the dressing are finished, a shutter 26 is opened, and the injection of the water from the water injection port 20 is stopped. When the light projection surface 28 of the light emission part 17 and the light receiving surface 29 of the light receiving part 18 are exposed from underwater, air is jetted toward the light projection surface 28 and the light receiving surface 29 from an air jetting port 25. Afterwards, the rotary grinding wheel 7 is lowered in a container 16 (between the light projection surface 28 and the light receiving surface 29), and a tip position of the rotary grinding wheel 7 is optically detected. |
