M.S. Thesis Presentation by Fabien Christian Pastour
Monday, November 2, 1998

(Dr. Steven Liang, advisor)

"Ultrasonically Assisted Machining of Aluminum Alloy"

Abstract

Ultrasonically assisted machining is a new field of research in the manufacturing domain. This process involves the use of a tangentially excited tool on a conventional lathe. This work takes a reverse angle on the machine tool vibration problem and investigates the effects of forced vibrations on the surface quality, cutting efforts and tool wear.

The main objectives of this investigation are to prove the effectiveness of this process for aluminum alloys and to have a better understanding of the effects of ultrasonic assistance on the cutting conditions.

To achieve this objective the behavior of the process on E356T6 aluminum alloy is investigated. In order to be able to compare conventional and assisted turning experiments, the surface finish and cutting force for both processes are evaluated under a wide range of cutting speed, feed rate and depth of cut.

The results are compared to quantify the relative advantages of ultrasonic assistance to turning. Findings concerning positive, negative and specific behaviors and implications for future research are discussed