Tool radius adjusting system for boring holder, tool radius adjusting method in machine tool, and machine tool

摘要

A boring holder (1) in a tool radius adjusting system is provided with a cutting blade (70) and fine (20) and coarse (50,90) motion adjusting mechanisms each capable of adjusting the position of the cutting blade (70) relative to a rotational axis of the boring holder. The tool radius adjusting system is provided with a tool radius measuring device (109) for measuring the tool radius of the boring holder (1) and a controller (108) configured to calculate a compensation amount based on a tool radius measured by the tool radius measuring device (109) and a target tool radius and to operate the fine (20) and coarse (50,90) motion adjusting mechanisms based on the compensation amount so that the tool radius is brought into agreement with the target tool radius.