Experimental study on the wear mechanism of cemented carbide tools under high speed cutting conditions

Abstract

This paper takes interface friction theory and tool wear theory as the starting point and proposes an experimental study on the wear mechanism of cemented carbide tools under different cutting conditions. Titanium alloy Ti-6Al-4V material is selected as the object of study, and its corresponding tool grade YG8, in addition to setting up two groups of control tools, S30T and YW2, and at the same time to determine the experimental workpiece materials and experimental equipment. In order to more intuitively demonstrate the experimental effect of the wear mechanism under high-speed cutting conditions, a finite element simulation model is constructed, and the material constitutive equations, contact properties, and failure criteria of the model are set to investigate the wear mechanism of cemented carbide tools under high-speed cutting conditions. When the cutting speed is 200m/min, the relationship between the size of the main cutting force of the three tool materials is S30T (407N) > YW2 (348N) > YG8 (301N), and with the increasing cutting speed, the YG8 tool still maintains excellent wear performance. Under the same conditions, the cutting distance of YG8 (L=11000mm) is larger than that of YW2 (L=5700mm). The wear mechanism of cemented carbide tools under high-speed cutting conditions is demonstrated in this paper in an intuitive manner, which has a positive impact on their performance improvement.