Patent ID: 7874893
Filing Date: 2011-01-25
Classification: B24B

Abstract:
1. A method of honing a workpiece having a hole to be processed by inserting a honing head with a grinder at an outer periphery thereof into the hole and moving the grinder towards an outer side of a diametrical direction of the honing head with an expansion member installed within the honing head to press an inner surface of the hole, the method comprising: storing an amount of an expanding movement as a target expansion amount determined when the honing head is inserted into a gauge hole of a master gauge having a same size as a target processing diameter and the grinder contacts an inner surface of the gauge hole with the expansion member; honing an inner surface of the hole by inserting the honing head into the hole, moving the grinder towards the outer side of the diametrical direction with the expansion member installed within the honing head, and rotating the honing head; and completing the honing when a value obtained by subtracting an amount of an advancement of the grinder based on a distortion of the workpiece generated by a processing reaction force of the grinder against the hole from the amount of the expanding movement of the grinder reaches the target expansion amount established using the master gauge.