重畳超仕上げに関する研究 : 第4報,重畳振動仕上げによる加工表面の平滑化(機械要素,潤滑,設計,生産加工,生産システムなど)

概要

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In this investigation a high efficient mirror machining process with providing above 20kHz ultrasonic vibration and 20-50Hz low frequent vibration to fine abrasive stone, has been created and named "Superposition superfinishing (SSF process)". This machining process consists of the first cutting process (SVC process: superposition vibration cutting) and the second mirror machining process (SF process: superfinishing). To finally obtain a high efficient and high precision mirror surface with smoothness, more fine uneven surface roughness on first cutting process is desired, because the mirror finishing time on second process can be reduced. Until now, in several experiments it was practically observed that surface roughness by superposition vibration cutting is smaller than that by superfinishing without stone loading. In this report, some experiments have been examined to confirm this inproving effect in detail. Experimental conditions are as follows: Rotational frequency of work: 60-950min^<-1>, Work diameter (material): φ35mm (SKS3, H_RC47), Frequency F and Amplitude A of Low frequent vibration: 0-25Hz, 0-1mm, Frequency f and Amplitude a of ultrasonic vibration: 0-46kHz, 0-7.5μm, Stone Pressure P: 24.5-196kPa, Stone: WA(600-3000)RH(20-80)V, Machining fluid: Light oil. In this paper, it is confirmed with analyzing and experiments that surface roughness by SVC process can be improved in comparison with SF process without stone loading.
2010-07-25