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.
2016
Procedia CIRP
5th CIRP Global Web Conference Research and Innovation for Future Production, 2016
Laboratory for Manufacturing Systems and Automation (LMS), University of Patras, grc
2016
Grossi, Niccolò; Sallese, Lorenzo; Montevecchi, Filippo; Scippa, Antonio; Campatelli, Gianni
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1074311
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