Study of the Effect of the Changeable Stiffness Tool System with Ultrasonic-Assisted Vibration on the Precision of the Turning Process

• Main Authors: Shih-Hsun Li, 李昰勳
• Other Authors: S G Chuech
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/82691499760696103476

碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 101 === The purpose of this thesis is to study the effect of the changeable-stiffness flexible tool fixture on the precision of the turning process of aluminum alloy A6061-T6 with ultrasonic-assisted vibration. In order to attain this end, we used the finite element method for the structural analysis of the changeable-stiffness flexible fixture to determine the dimensions of the fixture. Then we produced the changeable-stiffness tool fixture by using wire electrical discharge machining. According to the surface roughness regression analysis, flexible turning with ultrasonic-assisted vibration can produce better surface roughness than turning without ultrasonic-assisted vibration when operating at intermediate stiffness values. The regression analysis of spectrum area removal rate showed that the small wavelength area removal rate is greater while stiffness is smaller and the medium-to-large wavelength area removal rate is greater while stiffness is greater. According to the regression analysis of the change of the ratio of the depth of cut, we found that the smaller the stiffness is, the greater the change of the ratio of the depth of cut becomes.