| Summary: | 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.
|
|---|
