Development of high performance CFRP spindle for machine tool applications

这就要求机床提高切削速度。为了满足这种要求，主轴不仅要高速旋转，而且要高加速度旋转。本研究的目的是开发复合材料（碳纤维增强塑料）主轴，以实现低能耗的高转速。主要研究结果如下：1.采用有限元法计算了复合材料主轴的静刚度、动刚度和热刚度。在此基础上，设计了CFP主轴.测量了主轴的静刚度和固有频率等基本性能，并与有限元计算结果进行了比较。计算值与实测值吻合较好.比刚度（静态刚度/重量）比传统的金属主轴增加了一倍。4.由于减少了质量，达到最大主轴转速所需的时间可以减少。5.试验主轴具有极高的阻尼特性，能有效抑制颤振，对CFRP主轴的制造具有重要的指导意义。

It is required to machine tools for increasing the cutting speed. To meet such requirement, the main spindle must rotate with not only high speed but also with high acceleration. The aim of this research is to develop the spindle made of composite materials (Carbon Fiber Reinforced Plastics) so that the high rotation with small energy consumption can be achieved. The main results are summarized as foliows :1. The static stiffness, the dynamic stiffness, and the thermal stiffness of the spindle made of composite materials were calculated with the Finite Element Method. Based on the results, the CFP spindle was manufactured.2. The fundamental performances of the spindle such as static stiffness and the natural frequency were measured and compared with the FEM results. Satisfactory agreement between the calculated and measured values was obtained.3. The specific stiffness (static stiffness / weight) is doubled compared with the conventional metal spindle.4. Thanks to the reduced mass, the time needed to reach the maximum spindle speed could be decreased.5. The test spindle showed extremely high damping characteristic, which was effective for suppressing the chatter vibration.Important guide for making the CFRP spindle was summarized.