Patent ID: 6609859
Filing Date: 2003-08-26
Classification: B23B,Y10T

Abstract:
Ceramic cutting insert for a cutting tool which comprises a holder with an insert seat intended for the acceptance of the cutting insert, and a clamp which is connected to the holder to firmly clamp the cutting insert in the seat, said clamp includes a nose provided to grip into one of two recesses which have their openings on opposite upper and lower sides of the cutting insert in order to pull the cutting insert into the insert seat, wherein the recess has a rotational symmetrical shape and comprises:an inner cavity which is delimited by a cylindrical or slightly conical wall surface; an external cavity extending from the inner cavity and expanding outwards by a smoothly ever-increasing diameter in a direction from the inner cavity to an entrance opening in one of the upper or lower sides, wherein the external cavity is delimited by at least two ring shaped partial surfaces located between the inner cavity and the one of the upper or lower sides, and wherein the at least two ring-shaped surfaces comprise a first conical surface and a second convex dome-shaped surface that shares its boundary with the first conical surface.