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A new experimental methodology to analyse the friction behaviour at the tool-chip interface in metal cutting

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Abstract

This paper investigates a new test to analyse the friction behaviour of the tool-chip interface under conditions that usually appear in metal cutting. The developed test is basically an orthogonal cutting process, that was modified to a high speed forming and friction process by using an extreme negative rake angle and a very high feed. The negative rake angle suppresses chip formation and results in plastic metal flow on the tool rake face. Through the modified kinematics and in combination with a feed velocity that is five to ten times higher than in conventional metal cutting, the shear and normal stresses are only acting in a simple inclined plane, allowing to calculate the mean friction coefficient analytically. In addition, the test setup allows to obtain the coefficient of friction for different temperatures, forces and sliding velocities. Experiments showed, that the coefficient of friction is strongly dependent on the sliding velocity for the example workpiece/tool material combination of C45E+N (AISI 1045) and uncoated cemented carbide.

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Acknowledgments

The authors would like to thank the German Research Foundation (DFG) for the funding of the depicted research within the priority programme 1480.

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Authors and Affiliations

  1. Laboratory for Machine Tools and Production Engineering (WZL), RWTH Aachen University, Steinbachstr.19, 52074, Aachen, Germany

    Hendrik Puls, Fritz Klocke & Dieter Lung

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  1. Hendrik Puls
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  2. Fritz Klocke
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  3. Dieter Lung
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Correspondence to Hendrik Puls.

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Puls, H., Klocke, F. & Lung, D. A new experimental methodology to analyse the friction behaviour at the tool-chip interface in metal cutting. Prod. Eng. Res. Devel. 6, 349–354 (2012). https://doi.org/10.1007/s11740-012-0386-6

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  • DOI: https://doi.org/10.1007/s11740-012-0386-6

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