高速电主轴单元的振动性能研究

目的高速电主轴单元是实现高速、超高速磨削加工的关键技术之一．主要研究应用陶瓷轴承对电主轴动态性能的影响．方法采用“外点惩罚函数法”与“凑整解法”相结合的算法进行了陶瓷球轴承优化设计，并对电主轴进行了静、动态性能实验研究．结果探讨了陶瓷轴承电主轴单元结构布局形式的选择，分析了高速电主轴的振动性能．结论研究表明，应用陶瓷轴承作为主轴支承，电主轴单元振动小、温升低、运转精度高，有效提升电主轴功率和极限转速，适应高速、高效磨削加工的要求．

Study on Performance of Ceramic Bearings Electric Spindle Units at High-speed

The electric spindle unit is a key technology to realize the high-speed and super-speed grinding.In this paper,the influence of using ceramic bearings on dynamic performance of electric spindle was researched on.Structure of ceramic bearings electric spindle units and ceramic ball bearing are optimized by means of combining the outer point penalty function method with the rounding method.The dynamic performance and static performance of electric spindle are studied in the experiments.The study makes an inquiry into the select of structure form of the electric spindle with hybrid ceramic ball bearings and analyzes its characteristic of vibration.Experimental results show that the application of the electric spindle with hybrid ceramic ball bearings at high speed and precision grinding machine get on very well,because the electric spindle unit with hybrid ceramic ball bearings has many virtues,such as small vibration,high operation precision,high power and limited rotation speed that make it meet the need of high-speed and high-efficient manufacture.