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| Analysis and Suppression of the Simi-Crawling Phenomenon during High Hardness Spherical Grinding Process |
| WANG Jian-Lou, LUO Rui, XU Li-Ming, WANG Yu-Jue, HU De-Jin |
| (School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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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 simicrawling 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.
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Received: 15 July 2011
Published: 30 July 2012
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