Patent ID: 8317434

Claim:
A tool system for machining, having: a cutting insert having a bearing surface at least partly of convex curvature; at least one receptacle for the cutting insert having a supporting surface at least partly of concave curvature so that the cutting insert can be fixed in the receptacle by rotational movement relative to the receptacle from a start position to an end position; wherein the convexity and concavity of the bearing surface and the supporting surface, respectively, face one another, and define lines of curvature which are different from one another and of which at least one deviates from the circular form; wherein the line of curvature of one of the surfaces has a gradually increasing rate of curvature in a direction of the rotational movement, so that during the rotational movement of the cutting insert, a clamping force is produced that increases as the amount of rotation increases up to a maximum upon reaching the end position; wherein the receptacle comprises a pocket in a parent body in which a slot opening is cut formed, the slot opening defining an elastically flexible clamping part in the parent body, which clamping part surrounds a large part of the line of curvature of the supporting surface and ends in front of the stop surface of the receptacle; wherein the line of curvature of the bearing surface of the cutting insert corresponds to an arc of a circle, and the line of curvature on the supporting surface of the receptacle has the increasing rate of curvature: wherein the supporting surface has a V-shaped recess, and the hearing surface of the cutting insert has an inverted V shape; and wherein a height of side walls defined by the V-shaped recess when proceeding from the first end section to the second end section, decreases from an initial height down to approximately a root of the recess and then increases again up to the initial height.