TY - GEN
T1 - Design and evaluation of a piezoelectric actuator for turning
AU - Espinoza, Albert A.
AU - Mayer, Luke J.
AU - Oberlin, Paul V.
AU - Bement, Matthew
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84861563551&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84861563551
SN - 9781604237597
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
BT - IMAC-XXV - Celebrating 25 Years of IMAC
T2 - 25th Conference and Exposition on Structural Dynamics 2007, IMAC-XXV
Y2 - 19 February 2007 through 22 February 2007
ER -