High-speed Friction Testing Research Articles

Experimental study on the high-speed frictional behavior between the tire and asphalt pavement

Experimental study on the high-speed frictional behavior between the tire and asphalt pavement

超高速切削に関する研究 (第3報)

In ultra high speed cutting, the machinability concerned with chip formation mechanism is improved, but we believe that the tool wear is of practical importance, perhaps primary importance in such cutting speed range. However it is very difficult to analyse high temperature phenomena which occur for a very short time, so thier various problems have remained unknown by now. The purpose of this paper is to present experimental results obtained by the high speed cutting, high speed friction testing and observation of tool wear through electron microscope. The results are as follows : (1) In mild steel cutting at speed range of 1, 0008, 000m/min, as the cutting speed is raised, the tool temperature increases.(2) The ceramic tool wears relatively, slow at lower speed than about 2, 000m/min, but it rapidly increases at critical speed range of 2, 0003, 000m/min and then reaches the equilibrium value above the critical speed and we believe that the temperature on tool surface is about melting point of α·Al2O3.(3) The cemented carbide tool wears rapidly at higher speed than about 500m/min and wear rate increases with cutting speed.