This paper discusses the effects of ploughing and friction in microscale machining. The friction coefficient has previously been shown to be sensitive to the geometry of the abrasive particle and the depth of indentation. From a micromachining standpoint, the friction coefficient is modeled to be a function of the tool edge radius and the undeformed chip thickness, wherein the tool edge is modeled as a sliding cylinder on a flat workpiece. The contributions of ploughing force, which assumes significance in microscale machining, are better modeled using an integration approach over the edge of the tool. Two force models for the estimation of ploughing forces are compared, wherein one model uses a slip-line field analysis and the other uses a method of force balance on the deformation boundary. Basic microcutting (shaping) experimental data are presented and compared to the prediction results. The results show that a nonuniform friction coefficient improves the predictability of the force model.
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e-mail: siva.venkatachalam@gatech.edu
e-mail: steven.liang@me.gatech.edu
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April 2007
Technical Papers
Effects of Ploughing Forces and Friction Coefficient in Microscale Machining
Siva Venkatachalam,
Siva Venkatachalam
The George W. Woodruff School of Mechanical Engineering,
e-mail: siva.venkatachalam@gatech.edu
Georgia Institute of Technology
, 813 Ferst Drive, N.W., Atlanta, GA 30332
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Steven Y. Liang
Steven Y. Liang
The George W. Woodruff School of Mechanical Engineering,
e-mail: steven.liang@me.gatech.edu
Georgia Institute of Technology
, 813 Ferst Drive, N.W., Atlanta, GA 30332
Search for other works by this author on:
Siva Venkatachalam
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, 813 Ferst Drive, N.W., Atlanta, GA 30332e-mail: siva.venkatachalam@gatech.edu
Steven Y. Liang
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, 813 Ferst Drive, N.W., Atlanta, GA 30332e-mail: steven.liang@me.gatech.edu
J. Manuf. Sci. Eng. Apr 2007, 129(2): 274-280 (7 pages)
Published Online: September 20, 2006
Article history
Received:
March 13, 2006
Revised:
September 20, 2006
Citation
Venkatachalam, S., and Liang, S. Y. (September 20, 2006). "Effects of Ploughing Forces and Friction Coefficient in Microscale Machining." ASME. J. Manuf. Sci. Eng. April 2007; 129(2): 274–280. https://doi.org/10.1115/1.2673449
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