Cutting or punching tool for use in automobile construction, has cutting punch comprising cutting edge that is terminated on its circumference by concave curved or embossed part which has bend radius of specific millimeters

摘要

The tool (1) has a cutting punch (3) comprising a cutting edge (13) within an outer circumference (UM) of a covering wall (14) of a base body (15), where the edge presents a V-shaped cutting profile. The edge is terminated on its circumference, in direction of a region of a circumferential edge (16) of the wall, by a concave curved or embossed part (17) that has bend radius of 2.8 millimeters. An independent claim is also included for a method for forming perforation in a thermoplastic piece.