Research on equipments and production line of hot stamping

摘要

Hot stamping is a reliable way for the production of high performance auto parts with light weight. Hot stamping process requires pre-blanking steel sheet to be transported and processed at elevated temperature, and the performance of hot stamping products is closely related to temperature. This paper presents 2 types of hot stamping lines independently developed, 2000kN test line and 6000kN production line. The 2000kN test line is composed of a chamber furnace for heating blanks, a 2000kN electric servo mechanical press for forming heated blanks and a joint robot for transporting. The production line has multi-chamber furnaces, high-speed multi-axis Cartesian robots and electric servo mechanical press. Hot stamping process is carried out by heating equipments, transporting equipments and forming equipments cooperatively. Mechanical link servo press (MLSP) carries out hot stamping process by fast downward, slowly mold closing and holding pressure at bottom. Robots cooperatively transport hot blanks as fast as possible for the sake of reducing exposure at air and temperature drop. Multi-chamber furnaces dispatch chambers into or out of production cycle to implement flexible production. The production line carries out continuous and efficient production at a steady beat.