Metal material e.g. stainless steel sheet, cutting tool, has punch comprising free end with cutting edge defining closed or open outline, where edge is made of polycrystalline diamond and is in contact with metal material placed on matrix

摘要

The tool has a punch (2) comprising a free end provided with a cutting edge (23) that defines a closed or open outline, where the cutting edge is made of polycrystalline diamond. The cutting edge is in contact with a metal material placed on a matrix. The punch includes a shock resistant metal alloy block (201) having an end (21) fitted in a punch holder (3), and a block (202) divided into a tungsten carbide part (2021) and a polycrystalline diamond part (2022) that are sintered. The matrix is entirely or partially made of polycrystalline diamond.