Abstract: A piston processing apparatus includes a work attaching head capable of fixing a piston material, a work rotating device, a grinding wheel, a grinding wheel rotating device, first and second moving mechanisms for moving the grinding wheel, a rotational angle detector for detecting a rotational angle of the work attaching head, a first and second position detectors for detecting a position of a grinding surface of the grinding wheel, a controller controls the first and second moving mechanisms to grind the outer circumferential surface by the grinding wheel based on target-position information of the grinding surface corresponding to a position on the outer circumferential surface of the piston material. According to the piston processing apparatus, the outer circumferential surface of the piston material can be processed into a three-dimensional shape with high-accuracy, and a piston that can improve fuel efficiency.

Abstract: A piston processing apparatus includes a work attaching head capable of fixing a piston material, a work rotating device, a grinding wheel, a grinding wheel rotating device, first and second moving mechanisms for moving the grinding wheel, a rotational angle detector for detecting a rotational angle of the work attaching head, a first and second position detectors for detecting a position of a grinding surface of the grinding wheel, a controller controls the first and second moving mechanisms to grind the outer circumferential surface by the grinding wheel based on target-position information of the grinding surface corresponding to a position on the outer circumferential surface of the piston material. According to the piston processing apparatus, the outer circumferential surface of the piston material can be processed into a three-dimensional shape with high-accuracy, and a piston that can improve fuel efficiency.