Shim plate for tools for cutting machining as well as a tool

Abstract

A shim plate for mounting in a cutting tool for rotary chip removing machining, the cutting tool including a basic body having a rotational axis, a peripheral envelope surface concentric with the rotational axis, a front end surface, and at least one insert seat including a seat surface, the basic body being rotatable in a direction of rotation and arranged to, in each insert seat against the seat surface, receive the shim plate and a mountable cutting insert adjacent to the shim plate. The shim plate includes a bottom surface adapted to adjoin to the seat surface of the basic body, a contact surface opposite to the bottom surface and adapted to adjoin to the cutting insert, and at least one side surface that extends between the bottom surface and the contact surface. In a radial cross-section orthogonal to the rotational axis and traversing the shim plate, an imaginary straight line (a) associated with the bottom surface, intersecting a point (a) of the cross-section where the bottom surface is closest to the envelope surface of the basic body and a point (a) of the cross-section where the bottom surface is closest to the rotational axis of the basic body, and an imaginary straight line (b) associated with the contact surface, intersecting a point (b) of the cross-section where the contact surface is closest to the envelope surface of the basic body and a point (b) of the cross-section where the contact surface is closest to the rotational axis of the basic body, diverge toward the envelope surface of the basic body and form an angle α with each other.