The Study and Measurement for The Dynamic Pull-In Force of A

• Main Authors: Sheng, J-Ming, 沈哲民
• Other Authors: Ling Cheng-Chang
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/91867575944980738618

碩士 === 國立中正大學 === 機械工程學系 === 85 === The development and design of a high speed spindle is one of the key technologies for a high speed machining center. High speed machining has a remarkable advantages of the surface finish, lower cutting forces, no large amount of heat transferring to the workpiece, low influence of critical cutting frequencies etc. However, very few high speed spindle designers notice that it may has a disadvantage of the decreasing of the pull-in force measuring device has been developed to cooperate with the theoretical analysis of the dynamic pull-in force of a spindle. A drawbar mechanism consists of draw jaws, a pull stud, belleville springs, integral intensifier mechanism etc. All of these parts are considered to be elastic bodies and rotating with the spindle. In this thesis, the belleville springs and the integral intensifier are considered to be the major parts which cause the reduction of the pull-in force during the high speed rotation. Extensive theoretical analyses of the dynamic behaviors of the belleville springs and the effects of the integral intensifier has been investigated. The results of the theoretical analyses are compared with the experimental studies by using the dynamic pulling force measuring device. It was found that the effects due to the integral intensifier are much higher than that of the belleville springs.