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

Abstract

Abstract: 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.

Key words: spherical grinding, simicrawling phenomenon, stiffness, condition monitoring

CLC Number:

TG 58

WANG Jian-Lou, LUO Rui, XU Li-Ming, WANG Yu-Jue, HU De-Jin. Analysis and Suppression of the Simi-Crawling Phenomenon during High Hardness Spherical Grinding Process[J]. Journal of Shanghai Jiaotong University, 2012, 46(07): 1026-1031.

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