超精密切削加工されたAl合金の仕上げ面性状に及ぼす工具摩耗の影響(第2報) : 単結晶ダイヤモンドR刃バイトの切れ刃の摩耗が表面粗さに及ぼす影響

概要

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Ultra-precision cutting of soft metals is mainly used for generating reflection surface of optical equipments. Accordingly roughness of machined surface is very important evaluation item in quality because the roughness affects performance of the optical equipments. Workpieces are actually machined with a worn diamond tool in machining shops whereas ultra-precision cutting with a single crystal diamond tool is well known as a machining method owing high quality finished surface to a sharp cutting edge of the tool. The purpose of this study is to find out the relation between tool wear and surface roughness machined with a worn tool in ultra-precision cutting process. Profile of a machined surface was measured at intervals of a fixed cutting distance, and profile curves in cutting and feed directions were investigated by using spectrum analysis. As a result of experiments and considerations, we reached the following results. (1) Cutting tool vibrations induced by tool flank wear increased roughness of machined surface in cutting direction and also increased roughness iNteed direction. (2) Deterioration of copying of cutting edge shape decreased surface roughness in feed direction. (3) Surface roughness generated by tool vibrations exponentially increased with increase in flank wear of cutting edge generating finished surface.
公益社団法人精密工学会の論文
2006-07-05