Surface hardening process for metal stamping die

Abstract

The invention relates to a die forming process and particularly relates to a surface hardening process for a metal stamping die. The process comprises the steps of 1) polishing a metal stamping die surface; 2) removing oil stains on the metal stamping die surface; 3) applying a silica light absorbing coating on the metal stamping die surface uniformly, and controlling the thickness to be within a range of 0.04-0.08mm, wherein the silica light absorbing coating comprises, by mass, 5% of nickel base alloy powder, 1% of wolfram carbide and 1% of titanium carbide mixtures; 4) drying the metal stamping die obtained from Step 3); and 5) using a carbon dioxide laser beam to quickly scan the metal stamping die surface obtained from Step 4), and keeping the laser power P of 2800-4000W, the spot diameter of 8-15mm and the scanning speed V of 4-6m / min. Tests prove that the hardening process can improve the abrasive resistance and the rigidity of the metal stamping die surface, reduce grinding time and grinding times and further reduce the usage cost.

Description

technical field [0001] The invention relates to a mold forming process, in particular to a surface hardening process of a metal stamping die. Background technique [0002] Large-scale automobile panels are usually formed by stamping. Stamping dies are key process equipment for automobile production. Due to their large structural size, complex mold surface shapes, and high requirements for dimensional accuracy and surface quality, the mold manufacturing cycle is long and the cost is high. Automobile panel stamping dies are subjected to strong friction, radial stress and compressive stress during use, so it is very easy to cause dimensional wear and surface grooves to be scrapped. It can be seen that the automobile panel stamping die has a high impact on hardness and wear resistance. Higher requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a hardening process that can improve the wear resistance and ha...

AI Technical Summary

Problems solved by technology

[0002] Large-scale automobile panels are usually formed by stamping. Stamping dies are key process equipment for automobile production. Due to their large structural size, complex mold surface shapes, and high requirements for dimensional accuracy and surface quality, the mold manufacturing cycle is long and the cost is high.