The Static And Dynamic Analysis Of The T2120Deep Hole Machine Tool’s Spindle And Its Optimization

With the continuous development of the times, the development of deep hole machine isgradually towards the high speed, high precision and high efficiency. Spindle deep holemachine is used as one of the main components of deep hole machine, it faces the problems ofthe high-speed, long time of processing, difficult processing and so on, these problems willlead to the structure of the spindle unit with high stress and strain, and affect the machiningaccuracy of deep hole machine tools and the life of the spindle, therefore,we need to analysisand optimize the stress and strain of deep hole machine tool spindle structure unit. The articleanalyses the stress and strain of deep hole machine tool spindle structure unit by finiteelement method, it reduces the stress and strain of deep hole machine tool spindle structuralelement, and provides a new research method on the lightweight design of machine toolspindle deep hole, it has the important theory significance and practical value in the field ofdeep hole processing.This paper takes the T2120deep hole machine tool’s spindle as the main research object,it makes finite element analysis of the spindle structure by ANSYS12.0,and draws on thedisplacement nephogram and stress nephogram of spindle under load, the analysis resultsshow that maximum stress of machine tool spindle unit node need to be further optimized. Inorder to reduce the maximum stress of the spindle unit node, we take the maximumdeformation of spindle unit as the state variables, and take the spindle volume and unitstructure stress as optimization objective, and optimize the spindle deep hole machine bymulti objective method.The results show that, a compared study on multi-objective optimization results and theoriginal design of spindle, spindle volume is decreased by19%,unit maximum stress isreduced by27%;a compared study on multi-objective optimization results and the singleobjective optimization, spindle volume is decreased by11%,unit maximum stress is reduced by5%, maximum strain is reduced4%.It is more reasonable and superior by taking multi-objective optimization method. It makes the deep hole machine tool spindle structure stressoptimal on the case of light weight. This study has accumulated some experience forimprovement and optimization of structure of domestic deep hole machine tool spindle, andprovides effective reference.