A NEW THEORETIC RESEARCH ON SUPER HIGH-SPEED MILLING

摘要

Research for years indicates that cutting speed cannot be improved any further in accordance with existingcutting theory due to the cutting properties of tool material. In this paper, a new theory on super high-speed milling isput forward based on the analysis of temperature effect of super high-speed milling in which the temperature incutting zone increases as a result of distortion and fiction whereas the stiffness and hardness of workpiece descendprominently. On the other hand, the temperature of cutting-tool is kept under 300°C to make tool hardness invariable.Thus the ratio of cutting tool and workpiece hardness increases greatly to carry out super high-speed( v = 8,500m/ min ) milling. The theory has already been proved reasonable by cutting.