Investigation of changes in temperature of pressing tool during laser processing

Abstract

The article is devoted to improving the wear resistance of forging tools, in particular punches for punching holes and cutting stamp dies. Low tool life leads to an increase in the cost of finished products, an increase in labor and material costs for replacing worn tools and adjusting them, a decrease in the productivity of pressing equipment and an increase in the number of defective products. A method is presented for theoretical research of solving the problem of calculating the temperature field of a stamp die tool during laser processing. A differential equation was compiled for a numerical solution of the problem. The authors proposed the modes of laser heat treatment of a punch for punching holes and a stamp die tool made of high-hardness steel. Field tests conducted in industrial conditions showed that the proposed laser heat treatment modes made it possible to increase resistance of the punch intended for punching holes by 2 – 3 times and the resistance of the stamp dies by 2.2 – 2.8 times.