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RESEARCH PAPERS

Mechanism of Cutting Force and Surface Generation in Dynamic Milling

[+] Author and Article Information
D. Montgomery, Y. Altintas

The University of British Columbia, Department of Mechanical Engineering, Vancouver, B. C., Canada, V6T 1W5

J. Eng. Ind 113(2), 160-168 (May 01, 1991) (9 pages) doi:10.1115/1.2899673 History: Received July 01, 1989; Revised April 01, 1990; Online April 08, 2008

Abstract

An improved model of the milling process is presented. The model proposes a method of determining cutting forces in five distinct regions where the cutting edge travels during dynamic milling. Trochoidal motion of the milling cutter is used in determining uncut chip thickness. The kinematics of the cutter and workpiece vibrations are modelled, which identifies the orientation and velocity direction of the cutting edge during dynamic cutting. The model allows the prediction of forces and surface finish under rigid or dynamic cutting conditions. The proposed mechanism of chip thickness, force and surface generation is proven with simulation and experimental results. It is found that when the tooth passing frequency is selected to be an integer ratio of a dominant frequency of tool-workpiece structure in milling imprint of vibrations on the surface finish is avoided.

Copyright © 1991 by The American Society of Mechanical Engineers
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