High-Speed Grinding Experiment And Its Key Technology Research Based On PMAC-PC

High speed and high precision are primary research directions in mechanical manufacturing domain. More and more parts begin to be produced by high speed grinding technique. For many kinds, high precision, high frequency response servo control required parts, the traditional grinding technology is difficult to satisfy their requirements. And that ancient ellipse and other non-circle section parts were produced by form copying so that its precision could not be compared with grinding precision. But along with the continuing developments of the high speed and high precision motorized spindle unit technology, high frequency response linear motor feed unit technology, grinding wheel manufacture technology, detection technology and movement control technology, the conditions of non-circle parts manufacture become mature.The dissertation summarized the development trend of the high speed and super-high speed grinding both inside and outside, and made in-depth analysis in the motorized spindle technology, linear motor, timing control technology, and numerical control technology actual research on non-circle grinding critical technology etc. The dissertation emphatically made systemic theory analysis and experiment research on following aspects:(1) PMAC-PC was used as core controller, combined with high speed ceramic bearing motorized spindle, linear motor, detection technology, and grinding wheel technology etc, which was designed and integrated into a suit of high speed experimental numerical control grinding system. It realized the integration of machining and measure at first time. This paper has analyzed the stationary response and transitional response of the system, and estimated the stability of system. The simulation analysis of grinding NC system showed that this system had good following performance.(2) Big power and high speed ceramic bearing motorized spindle sample was designed and developed by myself. Through the analysis of finite element dynamics and thermo characteristic, cylindrical grinding experiment and dynamics capability testing for high speed motorized spindle, it indicates that the ceramic bearing motorized spindle unit was steady and reliable.(3) The theory analysis and simulation research for motorized spindle direct torque control.system, which was designed at the first time, were finished. It indicates that high speed motorized spindle direct torque control was feasible.(4) A high speed numerical control grinding linear motor servo feed unit based on PMAC was constructed. A linear motor which based on PMAC double close loop control arithmetic and orientation error compensatory technology was analyzed. The experiment research shows that this system has high orientation precision, and can satisfy grinding require.(5) Using PMAC timing control, a new precise grinding technology for non-.circle parts was developed and the experiment of ellipse parts external grinding was finished for the first time by experiment research.The results of the theory analyses and experiments above indicate that the high speed experimental numerical control grinding system has good performance. It sets up the basement for the development of the high speed and high precision numerical control machine manufacture technology.