关键词: 高速铣, 切削力, 表面粗糙度, 多目标参数优化, 切削机理

Abstract: Aiming at the problems of high tool costs caused by severe tool wear in high speed machining of difficult-to-cut materials such as a new type alloy cast iron, milling experiments on Cr15Mo were carried out with lower-cost cemented carbide tools. The effects of cutting parameters on cutting forces and surface roughness were investigated. The optimum parameter combination of achieving the grinding effectiveness(Ra=0.4 μm) was obtained, i.e. cutting speed vc=800 m/min, axial cutting depth ap=0.4 mm and feed rate f=0.6 mm/r. Furthermore, the experimental results were theoretically analyzed by using robust design optimization principle. The research results show that the theoretical analysis results are in good agreement with the experimental ones, which provides an effective way of exploring multi-objective parameter optimization for simultaneously realizing high speed, high quality and low cost in machining processes.

Key words: high-speed milling, cutting force, surface roughness, multi-objective parameter optimization, cutting mechanism