A study the on dynamic characteristics of a drill in drilling process.

• Main Authors: KO TAI SHENG, 葛台生
• Other Authors: 黃柏文
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/73197220010455880283

碩士 === 正修科技大學 === 機電工程研究所 === 92 === The dynamic characteristics of a drilling were investigated in this study. To improve quality and produce a higher production rate, the dynamic characteristics of the drilling process must be studied. A pre-twisted beam is used to simulate the drill. A vibration model for drilling is presented. Five exact solutions for a uniform cantilever beam in the transverse direction were used to discrete the equations of motion. By applying Galerkin’s method, the equations of motion for drill can be derived in matrix form. Besides, the experimental analysis is also considered in this article. Both numerical and experimental analysis indicate that the vibration amplitude of a drill becomes larger suddenly as a drill exactly goes into a work-piece.