Modares Mechanical Engineering

Modares Mechanical Engineering

Reducing Boring Bar Vibrations by Active Dynamic Absorber

Document Type : Original Research

Authors
Nahid Zabih Hosseinian
Maryam Fatemian
Behnam MotakefImani
Ferdowsi University of Mashhad
Abstract
Boring is a process which the diameter of the internal hole of the workpiece usually increases from the initial size to the desired value in some stages. In this operation, undesired vibrations lead to decrease in the smoothness of the surface; thus, active dynamic absorbers have been used to dampen the vibrations. In this research, two analog and digital accelerometers are used with an active dynamic absorber installed on a 720 mm boring bar. The analog sensor is used as a validation of the economical digital accelerometer. Therefore, thanks to the velocity feedback method, the vibrations caused by any impact forces have been damped and compared with the state without the presence of an active dynamic absorber. Furthermore, in this research, by increasing the amount of input voltage to the amplifier, the damped results of the impact applied to the end of the cutting tool have been increased remarkably and the frequency spectrums have been presented and examined to predict the damping.
Keywords
Active Dynamic Absorber
Impact Excitation
Boring Process
Velocity Feedback Method
Subjects
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1- Altintas Y, Weck Y. Chatter stability of metal cutting and grinding. Manufacturing Technology. 2004; 619-642-53.
2- Quintana G, Ciurana J. Chatter in machining process: A review. International Journal of Machine Tools & Manufacture. 2011; 351:363–76.
3- Litwhiler DH. A Custom Vibration Test Fixture Using a Subwoofer. Proceedings of the IAJC-ASEE International Conference, 2011.
4- Zaeh MF, Kleinwort R, Fagerer P, Altintas Y. Automatic tuning of active vibration control systems using inertial actuators. Manufacturing Technology. 2017.
5- Fallah M, Moetakef-Imani B. Identification of Dynamic Model for an Active Boring Bar. Modares Mechanical Engineering. 2019; 1917:1928-19.
6- Naeemi-Amini P, Moetakef-Imani B. Improving Active Vibration Control Performance in Machining Using Nonlinear Fractional PID Controller. Modares Mechanical Engineering. 2019; 281:291-19.
7- Ganguli A.Chatter reduction through active vibration damping [Dissertation]. Brussels: Université Libre De Bruxelles. 2005.
8- Naeemi-Amini P, Moetakef-Imani B. High- performance controller design and evaluation for active vibration control in boring. Scientia Iranica. 2018."
Modares Mechanical Engineering
Volume 22, Issue 10
October 2022
Pages 31-36