磨削过程优化及其计算机仿真

Simulation and Optimum for Plunge Grinding Process

建立了变进给磨削过程磨削功率的数学模型 ,通过改变磨削控制进给率 ,使磨削功率在功率极限域内变化 ,从而提高了粗磨阶段的磨削效率。粗磨结束时 ,通过设置超调量和采用负进给回撤策略缩短光磨时间和提高工件的表面质量。利用计算机仿真 ,得出能够应用于实际磨削过程的最佳磨削方案 ,使磨削过程得到全面优化。利用仿真所得的最佳磨削方案对磨削过程进行了试验验证 。

In order to improve the grinding efficiency and surface quality, this paper presents an optimum strategy to accelerated roughing stage for cylindrical plunge grinding process by changing grinding feed rate and keeping it near to its limit position. The varied-infeed grinding models depending on the grinding time had been built. And setting overshoot and using negative feeed retracting strategy at the end of the rough stage also could shorten the spark out time and improve the surface quality of the workpiece. The best grinding scheme can be obtained by computer simulation, and it may be used in the future. A real grinding experiment using the values obtained by simulation had been carried out. The results of experiments proved exactitude of the grinding model and the feasibility of the optimum strategy.