Kornel F. Ehmann

James N. and Nancy J. Farley Professor in Manufacturing and Entrepreneurship

www.mech.nwu.edu/fac/ehmann.html

Department of Mechanical Engineering: www.mech.nwu.edu

Robert McCormick School of Engineering and Applied Science

Northwestern University, Evanston, IL 60208-3111, U.S.A.

A B S T R A C T

The presentation will give a synopsis of three major areas of research conducted by the presenter and his graduate students. The first relates to the mechanics of micro-hole drilling operations with particular emphasis on point geometry and initial penetration phenomena due to dynamic instabilities. The second addresses chatter phenomena in sheet metal rolling operations. A new dynamic rolling process model will be used to explain three mechanisms that lead to gage variations. Finally, the third deals with problems related to precision machining. Accuracy analysis and compensation of Stewart-platform based machine tools will be addressed.

BIOGRAPHICAL SKETCH

Professor Ehmann holds a BS and an MS degree from the University of Belgrade, Yugoslavia, and a Ph. D. degree from the University of Wisconsin-Madison. His research interests are in the interrelated areas of machine tool structural dynamics, metal cutting dynamics, computer control of machine tools and robots, accuracy control in machining, and metal cutting processes. Professor Ehmann has taught a variety of courses in the general areas of manufacturing processes, machine tools, robotics and automation at both the undergraduate and graduate levels at Northwestern University and the University of Wisconsin-Madison. He has published over 150 papers and supervised over 35 MS and 35 Ph.D. students. He is the past Chair of the Manufacturing Engineering Division of ASME and is currently serving as an Associate Editor of the ASME Journal of Manufacturing Science and Engineering and as a member of the Board of Directors of the North American Manufacturing Research Institution of SME.