Upper bound analysis of oblique cutting: Improved method of calculating the friction area
Adibi-Sedeh, A.H. Madhavan, Viswanathan Bahr, Behnam
Adibi-Sedeh, A.H.
Madhavan, Viswanathan
Bahr, Behnam
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2003-04
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Article
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Chip flow angle,Equivalent rake angle,Normal rake angle,Nose radius tools,Oblique cutting,Upper bound analysis
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A.H. Adibi-Sedeh, V. Madhavan, B. Bahr, Upper bound analysis of oblique cutting: improved method of calculating the friction area, International Journal of Machine Tools and Manufacture, Volume 43, Issue 5, 2003, Pages 485-492, ISSN 0890-6955, https://doi.org/10.1016/S0890-6955(02)00273-0.
Abstract
This paper describes further development of the upper bound analysis of oblique cutting with nose radius tools described previously by Adibi-Sedeh et al. [1] by incorporation of an improved method for calculating the friction area at the chip-tool interface. Previously, the friction area was obtained from the shear surface area assuming that the ratio of these areas is the same as in orthogonal machining. Our results showed that this led to overestimation of the effect of friction on the chip flow angle, thereby resulting in smaller changes in the chip flow angle with inclination angle as compared to experimental data. In the new approach, the chip-tool contact length is obtained from the length of the shear surface assuming that the ratio of the lengths is the same as in orthogonal machining and the friction area is calculated using this length. The chip flow angle predicted using the new approach shows much better agreement with experimental data. In particular, the dependence of the chip flow angle on the inclination angle is accurately reproduced. Upper bound analysis of oblique cutting using this new model for the friction area provides an elegant explanation for the relative influence of the normal and equivalent rake angles on the cutting force. © 2003 Elsevier Science Ltd. All rights reserved.
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Pergamon
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International Journal of Machine Tools and Manufacture
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08906955