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Impact of Coupled Whirling and Tool Geometry on Machining Dynamics

[+] Author Affiliations
Achala V. Dassanayake, C. Steve Suh

Texas A&M University, College Station, TX

Paper No. IMECE2012-87954, pp. 667-672; 6 pages
doi:10.1115/IMECE2012-87954
From:
  • ASME 2012 International Mechanical Engineering Congress and Exposition
  • Volume 4: Dynamics, Control and Uncertainty, Parts A and B
  • Houston, Texas, USA, November 9–15, 2012
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4520-2
  • Copyright © 2012 by ASME

abstract

Turning dynamics is investigated using a 3D model that allows for simultaneous workpiece-tool deflections in response to the exertion of nonlinear regenerative force. The workpiece is modeled as a system of three rotors, namely, unmachined, being machined and machined, connected by a flexible shaft. Such a configuration enables the workpiece motion relative to the tool and tool motion relative to the machining surface to be three-dimensionally established as functions of spindle speed, instantaneous depth-of-cut, material removal rate and whirling. The equations of motion for the model are coupled through the nonlinear cutting force. The model is explored by considering the tool geometry. Different stages of stability for the workpiece and the tool subject to the same cutting conditions are studied.

Copyright © 2012 by ASME

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