高硬度球面磨削过程中类爬行现象的分析和抑制

在高硬度球面磨削过程中发现了一种类爬行现象，通过对球面磨削的主轴 砂轮 工件系统物理建模，推导了实际进给量与理论进给量之间的关系，揭示了进给系统的刚度、进给量和进给时间间隔对进给误差的影响规律;分析了类爬行现象的发生机理及其对球面磨削质量和磨削效率的影响.为了避免球面磨削过程中类爬行现象造成的危害，提出了基于声音和电流信号的双阈值模糊自适应控制策略对高硬度球面磨削过程进行监控.实验结果表明，与定进给磨削方式相比，所提出的模糊控制策略提高了磨削过程稳定性和工件表面质量，有效抑制了类爬行现象的发生.

Analysis and Suppression of the Simi-Crawling Phenomenon during High Hardness Spherical Grinding Process

The simi-crawling phenomenon is first discovered during the high hardness spherical grinding process. Through the modeling of spindle-wheel-workpiece system in the spherical grinding machine, the ralationship between the actual feed rate and the theoretical feed rate was presented, and the influence of feed system stiffness, theoretical feed rate and feed interval upon the feed error was quantitatively analyzed. The mechanism of the simi crawling phenomenon is revealed and its impact on sphere grinding quality and efficiency was discussed. In order to prevent from the harm caused by the simi-crawling phenomenon in sphere grinding, the adaptive fuzzy control strategy based on dual-threshold of both acoustic and electrical current signals was proposed to monitor the high hardness spherical grinding process. The strategy greatly improves the stability of grinding process and workpiece surface quality, and effectively suppress the simi-crawling phenomenon.