0
research-article

Generalized Dynamics and Stability of Turn-Milling Operations in Discrete Time Domain

[+] Author and Article Information
Alptunc Comak

Ph.D. Candidate, Manufacturing Automation Laboratory (MAL), Department of Mechanical Engineering, The University of British Columbia, 2054-6250 Applied Science Lane, Vancouver, BC V6T 1Z4 Canada
alptunc@alumni.ubc.ca

Yusuf Altintas

Professor, Fellow ASME, Manufacturing Automation Laboratory (MAL), Department of Mechanical Engineering, The University of British Columbia, 2054-6250 Applied Science Lane, Vancouver, BC V6T 1Z4 Canada
altintas@mech.ubc.ca

1Corresponding author.

ASME doi:10.1115/1.4040726 History: Received November 28, 2017; Revised June 21, 2018

Abstract

Turn-milling machines are widely used in industry because of their multi-functional capabilities in producing complex parts in one set-up. Both milling cutter and workpiece rotate simultaneously while the machine travels in three Cartesian directions leading to five axis kinematics with complex chip generation mechanism. This paper presents a general mathematical model to predict the chip thickness, cutting force and chatter stability of turn milling operations. The dynamic chip thickness is modeled by considering the rigid body motion, relative vibrations between the tool and workpiece, and cutter-workpiece engagement geometry. The dynamics of the process are governed by delayed differential equations by time periodic coefficients with a time varying delay contributed by two simultaneously rotating spindles and kinematics of the machine. The stability of the system has been solved in semi-discrete time domain as a function of depth of cut, feed, tool spindle speed and workpiece speed. The stability model has been experimentally verified in turn milling of Aluminum alloy cut with a helical cylindrical end mill.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In