Patent ID: 6672182
Filing Date: 2004-01-06
Classification: B23D,Y10T

Abstract:
A process for the manufacture of a circular saw blade by gluing together at least two congruent metal blades of an iron-based alloy, comprising:providing at least two circular-saw-shaped metal blades made from heat-treated sheet material of iron-based alloy, each metal blade having an outer lateral surface and an inner lateral surface; partially plastically deforming the metal blades all around in the area of their half radius; treating the inner lateral surfaces of the metal blades to provide them with a roughness according to EN ISO 4287 and EN ISO 4288 (DIN 4762) represented by a maximum profile height RZ of 3.0 to 7.0 &mgr;m and an arithmetic mean roughness index Ra of 0.30 to 0.75 &mgr;m; applying an adhesive onto the inner lateral surface of at least one of the metal blades; combining the metal blades with their inner lateral surfaces facing each other to form a sandwich structure; thermally hardening the adhesive while applying pressure to the sandwich structure; and treating the outer lateral surfaces of the metal blades to provide them with a surface roughness represented by a maximum profile height RZ of 5 to 10 &mgr;m.