Time domain prediction of milling stability according to cross edge radiuses and flank edge profiles |
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| Affiliation: | 1. Mechanical Engineering, School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK;2. Center for Precision Engineering, Harbin Institute of Technology, Harbin 150001, PR China;3. Army Aviation Institute, Beijing 101123, PR China |
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| Abstract: | This article proposes a time domain model for predicting an end milling stability considering process damping caused by a variety of cross edge radiuses and flank profiles. The time domain model of calculating indentation areas, as well as regenerative dynamic uncut chips, is formulated for the prediction of the stabilizing effect induced by interference areas between the edge profiles and undulation left on a workpiece. The interference area generates forces against the vibration motion, which acts as a damping effect. In the model, the present and previous angular position of cross radiuses and flank edge profiles are located to calculate the dynamic uncut chip as well as indentation area based on a time history of the dynamic cutter center position. The phenomenon that chatter is damped according to cross edge radiuses and flank edge profiles is successfully simulated with the proposed dynamic model and validated through the extensive experimental tests. |
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| Keywords: | Time domain chatter model Cross–flank edge profiles End milling stability Process damping |
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