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RESEARCH PAPERS

Simulation of Intermittent Turning Processes

[+] Author and Article Information
G. M. Zhang

Department of Mechanical Engineering and Systems Research Center, University of Maryland, College Park, MD 20742

S. Yerramareddy, S. M. Lee, S. C.-Y. Lu

Knowledge-Based Engineering Systems Research Laboratory, Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801

J. Dyn. Sys., Meas., Control 113(3), 458-466 (Sep 01, 1991) (9 pages) doi:10.1115/1.2896432 History: Received November 06, 1989; Revised June 22, 1990; Online March 17, 2008

Abstract

A simulation model is developed to study the dynamic characteristics of intermittent turning operations. Factors such as chip load, free-vibration of the toolpost structure, and nonhomogeneous hardness distribution in the material being cut are incorporated in the model. The principle of superposition is used in the formulation of the simulation algorithm. The impact between the cutting tool and the workpiece at the start of every cutting period during machining is treated as an initial value problem. The simulation model provides a quantitative evaluation of the tool vibratory motion during the intermittent turning process. Study of the cutting dynamics based on the simulation results not only confirms the experimental findings, but also indicates that increasing the static stiffness of the toolpost structure is an effective approach to control the tool vibratory motion. The determination of probability of tool breakage under various spindle speed settings is presented as an example to demonstrate the practical applications of the simulation model developed in this work.

Copyright © 1991 by The American Society of Mechanical Engineers
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