CUTTING BLADE POSITION ADJUSTMENT MECHANISM AND CUTTING EDGE-REPLACEABLE CUTTING TOOL

摘要

The purpose of the present invention is to ensure that there is a large margin for positional adjustment of a cutting blade so as to increase the frequency of resharpening and prolong the life of the tool, and to simplify work for adjusting the cutting blade position and enable fine adjustment of the position of the cutting blade to improve machining precision. Provided is a cutting blade position adjustment mechanism (1) for moving a cutting blade member (4) mounted on a tool body (2) relative to the tool body (2) to adjust the position of a cutting blade (8) of the cutting blade member (4), characterized in that: the cutting blade position adjustment mechanism (1) is equipped with a shaft member (5) that extends between the tool body (2) and the cutting blade member (4) and threadably engages with the tool body (2) and a nut member (6) that threadably engages with the shaft member (5) and abuts the cutting blade member (4); a first screw section (21) that threadably engages with the tool body (2) and a second screw section that threadably engages with the nut member (6) are provided coaxially on the shaft member (5) at different positions along the direction of the axis line (C) of the shaft member (5); and the thread pitch of the first screw section (21) and the thread pitch of the second screw section are different from each other.