The building of spindle thermal displacement model of high speed machine center

This article mainly analyzes the issues of spindle thermal displacement upon the acceleration of spindle, and proposes a complex multivariable regression analytical method to build a spindle thermal displacement model, so as to predict the thermal displacement of spindle caused by the heat under every time slot during the practical high speed machining process. Upon using the compensation of spindle displacement model, the largest value of cutting depth of the hole error of 62 μm that is caused by the spindle thermal displacement not being compensated can be reduced to a maximum cutting depth of the hole of 4.62 μm, and its average error value of cutting depth is 1.58 μm. Therefore, upon compensating the spindle thermal displacement model proposed in this study, the machining precision can effectively be improved.