Research On Vibration Characteristic And Its Effect On Machining Surface Quality Of Advanced Ceramics In HEDG

The advanced ceramics owing to its superior performance is already widely used in the engineering fields. But at present the processing method of advanced ceramics is to grind by diamond grinding wheel at ordinary speed which has low efficiency and high cost. Increased grinding parameters is easy to cause superficial injury, the processing quality can not be satisfied. High Efficiency Deep Grinding (HEDG) is one kind of high efficiency technology which developed in recent years. Using HEDG to process the ceramic material not only to be possible to enhance the efficiency greatly and to reduce the processing cost, but also could guarantee good machining surface quality. Along with grinding wheel speed enormously augments in the process of HEDG, the factors which influences the instability of grinding process intensifies, thus the requirement to the dynamic performance of machine tool's key parts as axle unit and feed unit also immediately promotes. One of existent questions is the vibration problem in grinding process caused by the rotational imbalance of grinding wheel and the unmatched grinding parameters in HEDG, which can cause the lobes and profile errors in the surface of workpiece.This paper adopts the ultra-high speed grinder as experimental platform and researches for the goal of vibration characteristic of HEDG process and its influence rules to the workpiece surface quality. Through academic research and experiment data analysis aim at testing of grinding vibration and machining quality, we optimize the grinding parameters and table a amelioration proposal for the dynamic performance weakness of machine tool's key parts. First, this paper establishes a dynamic model of plunge surface grinding and researches its stability in time domain and frequency domain. Through structural dynamic performance testing and racing experimentation we obtain influence characteristic of machine tool's mode parameters and external vibration resources act on the grinding process. Then we collect the acceleration signals and grinding force signals doing analysis in time domain and spectrum, research the dynamic performance of grinding process based on the HEDG experimentation of advanced ceramics. By testing and estimate the workpiece machining surface quality, we discuss the influence rules of vibration characteristic and grinding parameters to it. Finally, we devise a parameters optimization plan for the HEDG of advanced ceramics by considering the analysis...