Design and evaluation of a piezoelectric actuator for turning

Albert A. Espinoza, Luke J. Mayer, Paul V. Oberlin, Matthew Bement

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The machining process of turning is very important for many manufacturing applications. In high precision machining applications, in particular, the surface finish of turned parts is a major concern. Surface finish is strongly correlated with the vibrations and dynamic interactions between the part and the cutting tool. Process characteristics such as spindle speeds, cut depths, feed rates, and part material properties, can vary in real-time and have unexpected and undesirable effects on these vibrations and dynamic interactions. Thus, it is desirable to have a high bandwidth actuator capable of allowing a control system to react to these changing vibration conditions, and result in an improved surface finish. Consequently, this research project focuses on the design and analytical and experimental evaluation of a high bandwidth, high force, low displacement piezoelectric actuator for use between the tool and the tool holder of a conventional computer numerically controlled (CNC) lathe. The dynamic characteristics of the actuator are predicted by creating a finite element model. Next, the baseline performance of the fabricated actuator is characterized experimentally in non-cutting condition environments using tools such as accelerometers and a non-contact laser displacement sensor. Furthermore, the self-sensing capability of the actuator is measured. Finally, the cutting condition performance of the actuator is evaluated in face cutting operations on aluminum rods, and its effects on surface finish are measured using noncontact profilometry. Based on the results from these experiments, the performance characteristics of the actuator are documented for future use in high precision machining operations.

Original languageEnglish
Title of host publicationIMAC-XXV - Celebrating 25 Years of IMAC
StatePublished - 2007
Externally publishedYes
Event25th Conference and Exposition on Structural Dynamics 2007, IMAC-XXV - Orlando, FL, United States
Duration: Feb 19 2007Feb 22 2007

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Conference

Conference25th Conference and Exposition on Structural Dynamics 2007, IMAC-XXV
Country/TerritoryUnited States
CityOrlando, FL
Period02/19/0702/22/07

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