Chatter reduction in boring process by using piezoelectric shunt damping with experimental verification

Abstract Chatter is a self-excited type of vibration that develops during machining due to process-structure dynamic interactions resulting in modulated chip thickness. Chatter is an important problem as it results in poor surface quality, reduced productivity and tool life. The stability of a cutting process is strongly influenced by the frequency response function (FRF) at the cutting point. In this study, the effect of piezoelectric shunt damping on chatter vibrations in a boring process is studied. In piezoelectric shunt damping method, an electrical impedance is connected to a piezoelectric transducer which is bonded on cutting tool. Electrical impedance of the circuit consisting of piezoceramic transducer and passive shunt is tuned to the desired natural frequency of the cutting tool in order to maximize damping. The optimum damping is achieved in analytical and finite element models (FEM) by using a genetic algorithm focusing on the real part of the tool point FRF rather than the amplitude. Later, a practical boring bar is considered where the optimum circuit parameters are obtained by the FEM. Afterwards, the effect of the optimized piezoelectric shunt damping on the dynamic rigidity and absolute stability limit of the cutting process are investigated experimentally by modal analysis and cutting tests. It is both theoretically and experimentally shown that application of piezoelectric shunt damping results in a significant increase in the absolute stability limit in boring operations.

[1]  S.O. Reza Moheimani,et al.  Optimal resistive elements for multiple mode shunt damping of a piezoelectric laminate beam , 2000, Proceedings of the 39th IEEE Conference on Decision and Control (Cat. No.00CH37187).

[2]  Nesbitt W. Hagood,et al.  Damping of structural vibrations with piezoelectric materials and passive electrical networks , 1991 .

[3]  D. Leo Engineering Analysis of Smart Material Systems , 2007 .

[4]  Erhan Budak,et al.  Analytical Modeling of Chatter Stability in Turning and Boring Operations—Part I: Model Development , 2007 .

[5]  Shu-yau Wu,et al.  Piezoelectric shunts with a parallel R-L circuit for structural damping and vibration control , 1996, Smart Structures.

[6]  Yusuf Altintas,et al.  Mechanics of boring processes—Part II—multi-insert boring heads , 2003 .

[7]  Robert L. Forward,et al.  Electronic damping of vibrations in optical structures. , 1979, Applied optics.

[8]  Daniel J. Inman,et al.  Piezoelectric shunt damping for chatter suppression in machining processes , 2008 .

[9]  Andrew J. Fleming,et al.  Institute of Physics Publishing Smart Materials and Structures Reducing the Inductance Requirements of Piezoelectric Shunt Damping Systems , 2003 .

[10]  Shu-yau Wu,et al.  Method for multiple-mode shunt damping of structural vibration using a single PZT transducer , 1998, Smart Structures.

[11]  Jiří Tlustý,et al.  Manufacturing processes and equipment , 1999 .

[12]  Emre Özlü,et al.  Analytical modeling of chatter stability in turning and boring operations-Part II: Experimental verification , 2007 .

[13]  L. Meirovitch,et al.  Fundamentals of Vibrations , 2000 .

[14]  Yusuf Altintas,et al.  Analytical Prediction of Chatter Stability in Milling—Part II: Application of the General Formulation to Common Milling Systems , 1998 .

[15]  Clarence W. de Silva,et al.  Mechatronics: Fundamentals and Applications , 2015 .

[16]  Daniel J. Inman,et al.  Piezoelectric Energy Harvesting , 2011 .

[17]  Andrew J. Fleming,et al.  Multiple mode current flowing passive piezoelectric shunt controller , 2003 .

[18]  Yusuf Altintas,et al.  Analytical Prediction of Chatter Stability in Milling—Part I: General Formulation , 1998 .

[19]  Erhan Budak,et al.  Chatter Reduction in Turning by Using Piezoelectric Shunt Circuits , 2014 .

[20]  S. O. Reza Moheimani,et al.  Piezoelectric Transducers for Vibration Control and Damping , 2006 .

[21]  Maíra Martins da Silva,et al.  Experimental results on chatter reduction in turning through embedded piezoelectric material and passive shunt circuits , 2015 .

[22]  Yusuf Altintas,et al.  Mechanics of boring processes—Part I , 2003 .

[23]  S. A. Tobias Machine-tool vibration , 1965 .

[24]  J. Hollkamp Multimodal Passive Vibration Suppression with Piezoelectric Materials and Resonant Shunts , 1994 .