When machining miniaturized components, the contact conditions between the tool and the workpiece exhibit very small contact areas that are on the order of . Under these conditions, extremely high contact stresses are generated, and it is not clear whether macroscopic theories for the chip formation, cutting forces, and friction mechanisms are applicable. For this reason, the present investigation has focused on creating a basic understanding of the frictional behavior in very small scale machining processes so that evaluations of standard macroscale models could be performed. Specialized machining experiments were conducted on 70/30 brass materials using high-speed steel tools over a range of speeds, feeds, depths of cut, and tool rake angles. At each operating condition studied, the friction coefficient and the shear factor were obtained. Based on the experimental results, it was determined that the standard macroscopic theory for analyzing detailed friction mechanisms was insufficient in very small scale machining processes. An approach that utilized the shear factor, in contrast, was found to be better for decoupling the physical phenomena involved. Utilizing the shear factor as an analysis parameter, the parameters that significantly influence the friction in microscale machining processes were ascertained and discussed.
Skip Nav Destination
e-mail: mlovell@pitt.edu
Article navigation
October 2009
Research Papers
Tribological Characterization of Machining at Very Small Contact Areas
Michael R. Lovell,
Michael R. Lovell
Department of Industrial Engineering,
e-mail: mlovell@pitt.edu
University of Pittsburgh
, Pittsburgh, PA 15261
Search for other works by this author on:
P. Cohen,
P. Cohen
Marcus Department of Industrial and Manufacturing Engineering,
Penn State University
, University Park, PA 16802
Search for other works by this author on:
Pradeep L. Menezes,
Pradeep L. Menezes
Department of Industrial Engineering,
University of Pittsburgh
, Pittsburgh, PA 15261
Search for other works by this author on:
R. Shankar
R. Shankar
Department of Industrial Engineering,
University of Pittsburgh
, Pittsburgh, PA 15261
Search for other works by this author on:
Michael R. Lovell
Department of Industrial Engineering,
University of Pittsburgh
, Pittsburgh, PA 15261e-mail: mlovell@pitt.edu
P. Cohen
Marcus Department of Industrial and Manufacturing Engineering,
Penn State University
, University Park, PA 16802
Pradeep L. Menezes
Department of Industrial Engineering,
University of Pittsburgh
, Pittsburgh, PA 15261
R. Shankar
Department of Industrial Engineering,
University of Pittsburgh
, Pittsburgh, PA 15261J. Tribol. Oct 2009, 131(4): 042201 (7 pages)
Published Online: September 23, 2009
Article history
Received:
October 17, 2007
Revised:
May 6, 2009
Published:
September 23, 2009
Citation
Lovell, M. R., Cohen, P., Menezes, P. L., and Shankar, R. (September 23, 2009). "Tribological Characterization of Machining at Very Small Contact Areas." ASME. J. Tribol. October 2009; 131(4): 042201. https://doi.org/10.1115/1.3195038
Download citation file:
Get Email Alerts
Cited By
Related Articles
Application of Finite Deformation Theory to the Development of an
Orthogonal Cutting Model—Part II: Experimental Investigation and Model
Validation
J. Manuf. Sci. Eng (August,2006)
Observations on the Angle Relationships in Metal Cutting
J. Eng. Ind (August,1959)
Experimental Investigation of the Influence of Machining Condition on the Contact Sliding Behavior of Metals
J. Manuf. Sci. Eng (May,1998)
Tribological Behavior of Tool Steel Under Press Hardening Conditions Using Simulative Tests
J. Tribol (January,2018)
Related Proceedings Papers
Related Chapters
Contact Laws
Contact in Structural Mechanics: A Weighted Residual Approach
Clamping, Interference, Microslip, and Self-Piercing Rivets
Structural Shear Joints: Analyses, Properties and Design for Repeat Loading
Design a Hybrid Machine Tool for Plane Curve Friction Stir Welding
International Conference on Mechanical Engineering and Technology (ICMET-London 2011)