Study of the Effect of the Two-Axis Vibration Assisted Multi-Notch Type Changeable-Stiffness Fixture on the Precision Turning

• Main Authors: Wen, Jui-Chu, 文瑞竹
• Other Authors: Wu, Jung-Shu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/24295637143224549644

碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 103 === The purpose of this thesis is to study of the effect of the multi-notch type changeable-stiffness fixture on the precision of aluminum alloy 6061-T6, in order to understand the effect of the tool fixture stiffness on the precision of the turning process. Experiment is divided into three parts, the traditional turning, the flexible turning and the two-axis vibration assisted flexible turning. According to the surface roughness regression analysis, In the conditions of cutting speed 50m/min, setting cutting depth 0.01~0.05(mm), feed 0.03~0.09 (mm/rev), the frequency of 5000~15000 (Hz), the tool-tip displacement 9.14~12.40 (μm), voltage 100V. The values of surface roughness of the flexible and the two-axis vibration assisted flexible turning tend to be better than the traditional turning under median setting cutting depth (0.03mm), median feed (0.065mm/rev), median frequency (10000Hz) and higher tool-tip displacement (12.40μm) of cutting conditions. The best improvement rate of surface roughness of the flexible turning relative to traditional turning occurs at setting cutting depth 0.0269mm, feed 0.0783mm/rev, tool-tip displacement 12.40μm, the surface roughness improvement rate is 17.6%. And the best improvement rate of surface roughness of the two-axis vibration assisted flexible turning relative to traditional turning occurs at setting cutting depth 0.0259mm, feed 0.0666mm/rev, frequency 10856Hz, tool-tip displacement 12.40 μm, the surface roughness improvement rate is 31.1%.