Design and Technology Research of Hot Trimming Die of High Strength Steel for Hot Forming Parts

Abstract

Hot trimming technology of high-strength steel is to compound trimming process in hot stamping, so that the sheet can be trimmed or punched with high ductility and low hardness, which can improve product quality, shorten cycle time and reduce the production cost. In this research, we researched the influence of trimming temperature, clearance on trimming force, sheared surface quality .The results are as follows: trimming force decrease with the trimming temperature, clearance increase; the higher temperature, smaller clearance assures smoother sheared surface. Based on the above laws, optimal processing parameters are trimming temperature above 700 °C, clearance about 10% of the mould.