Development of Compliant Tool System of Digitalized Precision Polishing for Aspheric Surfaces

Abstract

Aspheric surfaces of high precision and low roughness are widely used in the military field, the aeronautics and astronautics field and some high-tech fields. Therefore, research works on the methods and equipments of digitalized polishing for aspheric surfaces are a hot issue in the modern precision manufacturing. The traditional precision manufacturing mainly depends on the higher precision equipments to promote the surface quality of aspheric surfaces, but the cost of equipments seems to be extremely expensive. Taking the general CNC lathe of two axis interpolation as a platform, and basing on the controllable damping characteristic of the Magnetorheological Fluids (MRF), a new kind of compliant polishing tool system for aspheric surfaces is developed in this paper. The tool system keeps the polishing force to be stable by the torque servo unit of MRF, and implements the compliant polishing.

The Effect of Polishing Tool Path on Polishing Parameters

“…1, where the polishing force is controlled by the MRT, the position and gesture of the polishing tool are controlled by the CNC system through the carriage of the lathe, the feed movement of the carriage and the tool system should ensure that the polishing force be perpendicular to the part surface at the polishing point. Virtual prototyping of tool system was analyzed by Bida Lv [3], adaptability of tool system was experimentally studied by Jianbo Zhang [4], and the contact stress between the tool head and part was analyzed based on Hertz theory by Yongjie Shi [5]. In this paper, the method of path planning of tool system is introduced, and the effect of the tool path on polishing parameters is discussed in detail.…”