超音波振動切削に関する研究 (第2報):—背分力方向振動切削による基礎円筒形状・理論表面粗さの解析と送り・切れ刃振動方向を変化させたときの表面粗さと真円度の考察—

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The final objective of this investigation is an invention of theory and technics for multiple precision cylindrical machining with combining ultrasonic vibration cutting on thrust force direction, and superposition superfinishing process. This finishing process is a high efficient mirror machining providing (20-50Hz) low frequent vibration and ultrasonic vibration above 20 kHz to fine abrasive stone. In this report, it is analyzed that high precision cyli ndrical machining as being basic profile can be achieved by vibration cutting on thrust force direction, and that theoretical surface roughness sho uld be formed around this basic cylinder. Cutting phenomenon are observed by some experiments. In the results, it is confirmed that chips on low feed rate and high cutting speed conditions have been cut to pieces as same as analyzing, and that roundness of 1.0μm being near equal to main spindle accuracy and surface roughness of 2.5μmRz for theoretical surface rou ghness 3.4μm are obtained by vibration turning in the case of aluminum alloy. Main cutting conditions are as follows : cutting speed ; v=280∼298m/min, feed rate ; S=2∼50μm/rev, depth of cut ; t=50μm, work material; carbon steel, aluminum alloy, brass, tool frequency; f=21.9kHz, amplitude ; a=9μm, cutting tool material and profile ; carbide K10, (0°,0°,6°,25°,2∼40°,2∼40°,0mm). This report indicates that ultrasonic vibration cutting on thrust force direction can be possibly used for multiple precision cylindrical machining.

超音波振動切削に関する研究 (第2報):—背分力方向振動切削による基礎円筒形状・理論表面粗さの解析と送り・切れ刃振動方向を変化させたときの表面粗さと真円度の考察—

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