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Research Papers

Correlation Between Friction and Wear of Cubic Borone Nitride Cutting Tools in Precision Hard Machining

[+] Author and Article Information
Wit Grzesik

Faculty of Mechanical Engineering,
Opole University of Technology,
Mikolajczyka Street 5,
Opole 45-271, Poland
e-mail: w.grzesik@po.opole.pl

Berend Denkena

Institute of Production Engineering
and Machine Tools,
Gottfried Wilhelm Leibniz Universität Hannover,
An der Universität 2,
Garbsen 30823, Germany
e-mail: Denkena@ifw.uni-hannover.de

Krzysztof Żak

Faculty of Mechanical Engineering,
Opole University of Technology,
Mikolajczyka Street 5,
Opole 45-271, Poland
e-mail: k.zak@po.opole.pl

Thilo Grove

Institute of Production Engineering
and Machine Tools,
Gottfried Wilhelm Leibniz Universität Hannover,
An der Universität 2,
Garbsen 30823, Germany
e-mail: grove@ifw.uni-hannover.de

Benjamin Bergmann

Institute of Production Engineering
and Machine Tools,
Gottfried Wilhelm Leibniz Universität Hannover,
An der Universität 2,
Garbsen 30823, Germany
e-mail: bergmann@ifw.uni-hannover.de

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received April 2, 2015; final manuscript received July 22, 2015; published online October 1, 2015. Assoc. Editor: Radu Pavel.

J. Manuf. Sci. Eng 138(3), 031010 (Oct 01, 2015) (6 pages) Paper No: MANU-15-1144; doi: 10.1115/1.4031189 History: Received April 02, 2015; Revised July 22, 2015

In this paper, the contribution of tool wear to friction was determined for precision hard turning using Cubic Borone Nitride (CBN) cutting tools. The tool nose wear VBC and the corresponding changes of component forces Fc, Ff, and Fp resulting from tool wear evolution were continuously measured during wear tests. Based on the mechanics of nonorthogonal cutting, the normal and friction forces acting on rake and flank faces were calculated for all measuring points, and as a result, relevant changes of the friction coefficient were determined. Additionally, friction changes resulting from tool wear under different feed rate, depth of cut, and tool nose radius were discussed in terms of the plowing energy produced by the tool nose.

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References

Figures

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Fig. 1

Illustration of (a) the cross section area and (b) equivalent cutting edge (ECE)

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Fig. 2

Resolution of forces acting on the rake and flank faces [13]

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Fig. 3

Changes of friction coefficient on the rake face with tool wear for variable (a) feed rate, (b) tool nose radius, and (c) depth of cut

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Fig. 4

Changes of friction coefficient on the flank face with tool wear for variable (a) feed rate, (b) tool nose radius, and (c) depth of cut

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Fig. 5

Changes of the plowing effect (ratio of cutting to plowing energy) during tool wear for variable (a) feed rate, (b) tool nose radius, and (c) depth of cut

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Fig. 6

Dependence of (a) friction coefficient on the rake face and (b) average undeformed chip thickness on the energy ratio EFC (I, II, and III—effects of changes of f, rε, and ap, respectively)

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