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TECHNICAL PAPERS

Chip Load Kinematics in Milling With Radial Cutter Runout

[+] Author and Article Information
J.-J. Junz Wang

Department of Mechanical Engineering, National Cheng-Kung University, Tainan, Taiwan, Republic of China

S. Y. Liang

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

J. Eng. Ind 118(1), 111-116 (Feb 01, 1996) (6 pages) doi:10.1115/1.2803631 History: Received April 01, 1993; Revised November 01, 1994; Online January 17, 2008

Abstract

This paper presents the analytical modeling of chip load and chip volume distribution in milling processes in the presence of cutter runout. The understanding of chip load kinematics has a strong bearing on the prediction of milling forces, on the assessment of resulting surface finish and tool vibration, and on the identification of runout for multi-toothed machining process monitoring and control. In this study a chip thickness expression is analytically established in terms of the number of flutes, the cutter offset location and the ratio of offset magnitude to feed per tooth. The effects of runout geometry, feed rate, and depths of cut on the overall chip generating action is discussed through the illustration of cutting regions and chip load maps. Explicit solutions for the entry and exit angles are formulated in the context of milling parameters and configuration. Experimental measurement of the resulting chip volumes from machining with an offset cutter is compared to an analytical model formulated from the chip thickness expression. Additionally, an average chip thickness prediction, based on the chip volume model in combination with the entry/exit angle solutions, is compared to data reported in the literature for validity assessment.

Copyright © 1996 by The American Society of Mechanical Engineers
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