Lightweight design of 45 000 r/min spindle using full factorial design and extreme vertices design methods

来源期刊：中南大学学报(英文版)2011年第1期

论文作者：PARK Seong-jin LEE Choon-Man HWANG Young-kug

文章页码：153 - 158

Key words：high-speed spindle; extreme vertices design; natural frequency; lightweight design; full factorial design

Abstract: Factors for determining the spindle size are the shaft diameter, positions of bearing and motor, and entire length of the spindle. Then, it is important to find the assembling of the optimal design variables, which satisfy the stiffness and rotational speed required to the spindle. A general full factorial design method was used to verify some factors that affect the natural frequency of a spindle. It is verified that the shorter shaft length and bearing span length represent the higher natural frequency, and there are some effects according to the change in the levels of factors. The detailed spindle dimension is determined by applying an EVD method, which can define the optimal bearing position through considering the limiting condition. Based on the estimated regression model, the optimal spindle size and bearing distance that can improve the primary natural frequency are obtained, and the influence of design factors on the natural frequency is also analyzed.