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Mathematical Problems in Engineering
Volume 2015 (2015), Article ID 106159, 10 pages
http://dx.doi.org/10.1155/2015/106159
Research Article

Research on Stability Prediction of the Crankshaft CNC Tangential Point Tracing Grinding

1Shanghai Key Laboratory of Intelligent Manufacturing and Robotics, School of Mechatronic Engineering and Automation, Shanghai University, No. 149 Yanchang Road, Mailbox 232, Shanghai 200072, China
2Jiangxi Key Laboratory of Numerical Control, Jiujiang University, Jiujiang, Jiangxi 332005, China

Received 16 June 2015; Revised 31 August 2015; Accepted 6 September 2015

Academic Editor: Ivanka Stamova

Copyright © 2015 Zhuoda Jiang and Yongyi He. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

As the key part of internal combustion engines, crankshaft with high efficiency and accuracy processing has always been the target of the engine manufacturer’s pursuit. Grinding is used to obtain the ultimate dimensional accuracy and surface finish in the crankshaft machining. Grinding of the main journals and the pin journals can be accomplished in a single clamping operation by CNC Tangential Point Tracing grinding technology. However, the chatter in the grinding process is harmful to the precision and surface quality. In this paper, stability lobe diagram is developed to predict the grinding chatter. First the dynamic model of Tangential Point Tracing grinding system is established. Then the limit formula of the critical grinding depth is calculated and the stability lobe diagram of the grinding system is presented. Finally, the validation experiments are carried out on the crankshaft grinding machine and the results are consistent with the calculation.