Improving Productivity in an Ultrasonic-Assisted Drilling Vertical Machining Center

[+] Author and Article Information
Mohamad Amin Moghaddas

EWI, 1250 Arthur E. Adams Drive, Columbus, OH 43221

Matt Short

EWI, 1250 Arthur E. Adams Drive, Columbus, OH 43221

N. Wiley

EWI, 1250 Arthur E. Adams Drive, Columbus, OH 43221

Allen Y. Yi

Department of Integrated Systems Engineering, Ohio State University, 1971 Neil Avenue, Columbus, OH 43210

Karl Graff

EWI, 1250 Arthur E. Adams Drive, Columbus, OH 43221

1Corresponding author.

ASME doi:10.1115/1.4039109 History: Received May 02, 2017; Revised January 11, 2018


Ultrasonic-assisted machining, which is the application of ultrasonic vibrations to standard, or 'conventional,' machine tools for drilling, milling and turning, as examples, is a rapidly developing technology aimed at increasing productivity of machining processes. While a solid foundation is being established through laboratory-based research studies, typically these processes have not yet progressed to the demanding requirements of the factory floor. The objective of the current work is to transition the ultrasonic-assisted drilling process from the laboratory to a production system compatible with automated machining systems. The critical development that is described is the design of the ultrasonic drilling module, having sufficient strength, stiffness and accuracy for production demands, while maintaining powerful levels of ultrasonic vibrations that result in lowered drilling forces and faster feed rates. Prior work in ultrasonic-assisted drilling is reviewed. The development of a module based on a vibration-isolating case, and making use of standard tool holder means is then reviewed. Performance of the system is shown to provide thrust force reductions, while maintaining or improving surface finish and drilling accuracy. The results from drilling several materials are presented.

Copyright (c) 2018 by ASME
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