Dynamic mathematical model and stability limits computation in the chatter system of hard turning Online publication date: Tue, 24-Jul-2018
by Guangjun Chen; Xianli Liu; Zhenzhong Mi; Renping Guo
International Journal of Manufacturing Research (IJMR), Vol. 13, No. 2, 2018
Abstract: The chatter in cutting process has a significant influence on production efficiency, processing quality, machining environment, costing and the lifetime of machine and cutting tools. The mathematical models of dynamic cutting force and cutting system dynamics in the cutting process were established by analytical method. The prediction of system stability limit in the multi-parameter hard turning process was made in the way of numerical simulation. The parameters taken into consideration include the spindle speed, the cutting width, the feed rate, the corner radius and the hardness of work-pieces. The critical conditions of the stable cutting in experimental high speed precision hard cutting system were computed. The results of predictions about stability limits were verified, which conform to actual measurement. The cutting chatter appears more easily, when the hardness of the workpieces is higher, the corner radius is bigger or the feed rate is smaller. [Submitted 25 December 2016; Accepted 29 August 2017]
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