Fixing member, tool body, and cutting tool

Abstract

The present invention provides a fixing member, a tool body, and a cutting tool that can suitably secure a cutting insert. [Solution] The fixing member body 51 has a pressing portion 55 that presses against the cutting insert 40, a support projection 52 protruding from the bottom of the fixing member body 51, an engaging recess 61a formed on the circumferential surface of the support projection 52 and having a bottom surface that is pressed by a fixing screw 23, and an axial recess 67 provided on the opposite side of the engaging recess 61a, wherein the pressing portion 55 presses against and fixes the cutting insert 40 with the fixing screw 23 that abuts against the bottom of the engaging recess 61a.

Claims

1. A fixing member that presses and secures a cutting insert, The fixing member body and A pressing portion is provided at the bottom of the main body of the fixing member for pressing the cutting insert, A support projection is provided from a portion of the bottom of the fixing member body that is different from the pressing portion, An engaging recess formed on the circumferential surface of the support projection and having a bottom surface that is pressed by the pressing member, A recessed portion provided on the opposite side of the engagement recess, which is axially aligned, It has, The pressing member, which abuts against the bottom of the engagement recess, causes the pressing portion to press and fix the cutting insert. Fixing member.

2. The fixing member has a pressing projection formed on the pressing portion that engages with the fixing hole portion of the cutting insert, The engaging recess is positioned at an angle toward the pressing projection when viewed from the top surface of the fixing member. The fixing member according to claim 1.

3. A shank member having an insert mounting portion on which a cutting insert is placed, A fixing member that presses and fixes the cutting insert positioned on the insert mounting portion of the shank member, A pressing member that engages with the aforementioned fixing member, Equipped with, The aforementioned fixing member is The fixing member body and A pressing portion is provided at the bottom of the main body of the fixing member for pressing the cutting insert, A support projection is provided from a portion of the bottom of the fixing member body that is different from the pressing portion, The engagement recess formed on the circumferential surface of the support projection, It has, The shank member is, The support hole into which the support projection of the fixing member is inserted, A hole in which the pressing member is inserted is in communication with the inner circumferential surface of the support hole, It has, The aforementioned fixing member is The bottom surface of the engagement recess is pressed by the pressing member inserted into the hole, On the opposite side of the engagement recess, there is a recess that is aligned in the axial direction. Tool body.

4. Cutting inserts and A shank member having an insert mounting portion on which the cutting insert is placed, A fixing member that presses and fixes the cutting insert positioned on the insert mounting portion of the shank member, A pressing member that engages with the aforementioned fixing member, Equipped with, The aforementioned fixing member is The fixing member body and A pressing portion is provided at the bottom of the main body of the fixing member for pressing the cutting insert, A support projection is provided from a portion of the bottom of the fixing member body that is different from the pressing portion, The engagement recess formed on the circumferential surface of the support projection, It has, The shank member is, The support hole into which the support projection of the fixing member is inserted, A hole in which the pressing member is inserted is in communication with the inner circumferential surface of the support hole, It has, The aforementioned fixing member is The bottom surface of the engagement recess is pressed by the pressing member inserted into the hole, On the opposite side of the engagement recess, there is a recess that is aligned in the axial direction. cutting tools.

5. A cutting insert and A shank member having an insert mounting portion on which the cutting insert is placed, A fixing member that presses and fixes the cutting insert positioned on the insert mounting portion of the shank member, A pressing member that engages with the aforementioned fixing member, Equipped with, The aforementioned fixing member is A fixing member body having a pressing portion for pressing the cutting insert, A support projection is provided protruding from the bottom of the main body of the fixing member, The engagement recess formed on the circumferential surface of the support projection, It has, The shank member is, The support hole into which the support projection of the fixing member is inserted, A hole in which the pressing member is inserted is in communication with the inner circumferential surface of the support hole, It has, The aforementioned fixing member is The bottom surface of the engagement recess is pressed by the pressing member inserted into the hole, On the opposite side of the engagement recess, there is a recess that is aligned in the axial direction, The fixing member has a pressing projection formed on the pressing portion that engages with the fixing hole of the cutting insert, and a sliding surface provided on the opposite side of the pressing projection, sandwiching the support projection. The shank member has a guide surface that guides the sliding surface and pulls the fixing member toward the fixing direction at the insert mounting portion relative to the shank member. The support hole is positioned such that, in a plan view, its central axis is offset toward the hole with respect to a straight line passing through the center of the fixing hole and perpendicular to the guide surface. cutting tools.

6. If the radius of the support hole is r1, the radius of the support projection of the fixing member is r2, and the gap between the inner circumferential surface of the support hole and the support projection on the opposite side of the hole is x, then the amount of displacement a of the central axis of the support hole with respect to the straight line is: a = r1 - r2 - x That is, The cutting tool according to claim 5.

7. The aforementioned straight line has an inclination with respect to a dividing line that passes through the center of the corner portion provided on the cutting insert and positioned on the guide surface side and the fixing hole portion. The cutting tool according to claim 5 or 6.

8. The aforementioned straight line coincides with a dividing line passing through the center of the corner portion provided on the cutting insert and positioned on the guide surface side, and the center of the fixing hole portion. The cutting tool according to claim 5 or 6.

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