Experimental Study on Force of Electric Heating Drilling to Hard-to-Cut Materials

Abstract

In this study, a simple and flexible transplantation device of electric heating drilling is developed for hard-to-cut materials. Based on this device, small holes (diameter of 1–3 mm) are drilled for stainless steel 1Cr18Ni9Ti and high manganese steel ZGMn13 adopting hard carbide twist drill YG6A. In the process of electric heating drilling, the dynamic change in drilling force (including axial force and torque) is discussed with the change in variant heating current, cutting speed, and feed. Experimental data show that axial force and torque increase with increasing cutting speed and feed, and with increasing heating current, total drilling force is obviously reduced in the initial stage, then it increases slightly over time. The heating current helps to reduce axial force and torque, which shows that electric hot drilling is effective in hard-to-cut materials.

Keywords:

• Drilling
• Electric
• Force
• Hard-to-cut
• Heat
• Hole