关键词: 垂直磨削法, 磨削痕迹分布, 磨削纹理, 生成机理

Abstract: Because grinding marks would remain on spherical and aspherical surfaces in cross grinding, so generating mechanism of grinding marks was investigated based on grinding trace simulations. Distribution equation of grinding traces was established. Generation and distribution mechanism of grinding traces on ground surfaces was analyzed in cross grinding, and the generation mechanism of grinding marks caused by alteration of grinding parameters was revealed. From the results of simulations, it may be found that the distribution of grinding traces is dense at central areas and sparse at outer areas of ground surfaces, and the distributions are periodic and radial. Length regularity, shape regularity, and distribution regularity of all the grinding traces remained on the ground surfaces were similar, except a certain phase angle is varied among grinding traces. When ratio of grinding wheel rotary speed to workpiece rotary speed is as integer, the worst grinding traces of two adjacent periods are connected together end-to-end, which leads to coupling and propagation of cracks at the junction. And then, breakage situation of ground surfaces is aggravated. Finally, the broken grinding traces are connected together, and the grinding marks are generated.

Key words: cross grinding method, distribution of grinding trace, grinding mark, generation mechanism