Patent ID: 6601486
Filing Date: 2003-08-05
Classification: B23B,Y10T

Abstract:
In combination:a stationary metal cutting tool holder having at least one seat for receiving a cutting insert; a mounting body for carrying the tool holder; and a securing element for securing the tool holder to the mounting body; the tool holder including a first coupling part defining a center axis, and the mounting body including a second coupling part arranged coaxially with the first coupling part; the first and second coupling parts being conical as viewed in a longitudinal section plane containing the axis, and being arranged one inside of the other, the first coupling part including teeth spaced circumferentially apart about the axis and projecting generally radially with respect to the axis, the teeth received in respective radially-open circumferentially spaced recesses formed in the second coupling part; each of the teeth terminating in an axially facing wall and including a sidewall contacting a sidewall of the respective recess, a curvature of the tooth sidewall being different from a curvature of the recess sidewall at locations where those sidewalls contact one another, wherein such contact is in the form of a point contact on each side of a generally radial line of symmetry of the respective tooth as viewed in a direction parallel to the axis; each of the contact points being operable to transmit a restraining force from the second coupling part to the first coupling part in a respective direction; each of the contact points defining a tangent line, wherein the restraining force is transmitted along a line of force oriented perpendicular to a respective tangent line; wherein a restraining angle is formed between the line of symmetry and each tangent line, each restraining angle being in the range of âˆ’5Â° to +45Â°; the contact points disposed on one side of the line of symmetry defining a first line of contact between the tooth sidewall and the recess sidewall, and the contact points disposed on the other side of the line of symmetry defining a second line of contact between the tooth sidewall and the recess sidewall, the first and second lines converging toward one another as viewed in the longitudinal section plane.