Study On Fast Tool Servo System Of Diamond Machine For Machining Target

The research on Inertial Confinement Fusion has special significance on the national economy,defense applications and basic explorations. In the process of research, a variety of irregular targetparts are required with high-precision, complex surfaces and special materials which are inefficientto be manufactured by using the traditional manufacturing technologies. The Fast Tool Servo is anew technology which can manufacture unsymmetrical or complex surfaces efficiently andaccurately by synthesizing the fast tracing motions of diamond tool and the servo motions ofmachine tool. The development of Fast Tool Servo technology provides a new, efficient,economical and reliable way for processing the target parts.According to the shape characteristics and the machining requirements on the modulationsurfaces of target part, a Fast Tool Servo system is developed with high stiffness, high frequencyresponse and big driving force in this paper, and the main contents are as follows:1) The analysis on driving performances of Fast Tool Servo systemThe transfer function of Fast Tool Servo system is founded, and the influences of modelparameters on the driving performances are analyzed. Specially, the influences of these factors onmachining accuracy are studied, including the cutting force, the shape attributes of microstructuresand the dynamic characteristics of machining system. Furthermore, the parameter design and themodel choice on PZT actuator are accomplished.2) The design for flexible hinge holderAccording to the applied characteristics of different flexible structures, a flexible holder isdesigned with simple and compact structure, and the mathematical model on stiffness and naturalfrequency is founded and analyzed. The structure parameters of flexible holder are optimized byusing the method of orthogonal experiment design.3) The test on driving performances and the identification of model parametersA Fast Tool Servo system is developed, and the security of important regions is verified. Thestatic and dynamic performances are tested, and the model parameters are identified and optimizedby sweep test. Furthermore, the modifying method of sinusoidal control signal is studied.4) The machining experiments on typical parts with complex surfaceThe feedforward control method is designed which is used to compensate the amplitude andthe phase of Fast Tool Servo system, and the control software is developed. In order to validate themachining capacity of the developed Fast Tool Servo system, the typical complex parts aremachined and analyzed, including radial sinusoidal part and sinusoidal phase plate.