关键词: 高速电主轴, 动态阶梯过盈, 有限元, 应力分析, 扭矩

Abstract:

A GD-Ⅱ motorized spindle was introduced herein, the magnitude of step interference was also determined based on the dynamic interference fit theory, then the finite element model of the jointed structure was built and the effect of different initial interferences was also analyzed under different running conditions. The analysis results show that the ability to transmit torque and the contact stress decrease with increasing spindle speed constantly, and the higher the spindle speed will lead to greater decreases of the transmitting torque capacity. The results also indicate that using 66H6/s6 and 65.9H6/t6 ladder interference magnitude can well meet the job requirements.

Key words: high speed electronic spindle, dynamic step interference, finite element, stress analysis, torque