Tool-tip Frequency Response Function (FRF) represents one of the essential inputs to predict chatter vibration and compute the Stability Lobe Diagram (SLD). Tool-tip FRFs are generally obtained for the stationary (non-rotating) condition. However, high speeds influence spindle dynamics, leading to a reduced accuracy of the SLD prediction. This paper presents a comprehensive method to identify speed-varying tool-tip FRFs and improve chatter prediction. First, FRFs for a screening tool is identified by a novel technique based on a dedicated experimental test and analytical stability solution. Then, a tailored receptance coupling technique is used to predict speed-varying tool-tip FRFs of any other tool. Proposed method was experimentally validated: chatter prediction accuracy was demonstrated through chatter tests.
Speed-varying Machine Tool Dynamics Identification Through Chatter Detection and Receptance Coupling / Grossi, Niccolò; Sallese, Lorenzo; Montevecchi, Filippo; Scippa, Antonio; Campatelli, Gianni. - ELETTRONICO. - 55:(2016), pp. 77-82. (Intervento presentato al convegno 5th CIRP Global Web Conference Research and Innovation for Future Production, 2016 tenutosi a Laboratory for Manufacturing Systems and Automation (LMS), University of Patras, grc nel 2016) [10.1016/j.procir.2016.08.022].
Speed-varying Machine Tool Dynamics Identification Through Chatter Detection and Receptance Coupling
GROSSI, NICCOLO';SALLESE, LORENZO;MONTEVECCHI, FILIPPO;SCIPPA, ANTONIO;CAMPATELLI, GIANNI
2016
Abstract
Tool-tip Frequency Response Function (FRF) represents one of the essential inputs to predict chatter vibration and compute the Stability Lobe Diagram (SLD). Tool-tip FRFs are generally obtained for the stationary (non-rotating) condition. However, high speeds influence spindle dynamics, leading to a reduced accuracy of the SLD prediction. This paper presents a comprehensive method to identify speed-varying tool-tip FRFs and improve chatter prediction. First, FRFs for a screening tool is identified by a novel technique based on a dedicated experimental test and analytical stability solution. Then, a tailored receptance coupling technique is used to predict speed-varying tool-tip FRFs of any other tool. Proposed method was experimentally validated: chatter prediction accuracy was demonstrated through chatter tests.File | Dimensione | Formato | |
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