Cubic Boron Nitride (CBN) cutters are widely used in finish turning of hardened parts. Their wear mechanisms and associated wear rates are important issues to be understood in view of the high cost of CBN cutters and because of the tool change down-time cost which impacts the economic justification of CBN precision hard turning. The objective of this study is to present a methodology to analytically model the CBN tool flank wear rate as a function of tool/workpiece material properties, cutting parameters and process arrangement in three-dimensional finish hard turning. The proposed model is calibrated with experimental data of finish turning of hardened 52100 bearing steel with a CBN insert, and further validated over practical hard turning conditions. It is shown that adhesion is the main wear mechanism over common cutting conditions, which agrees with documented observations, however, chemical diffusion can gain dominance over extended periods of machining time under aggressive cutting conditions.
Modeling of CBN Tool Flank Wear Progression in Finish Hard Turning
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received July 2003. Associate Editor: Dong-Woo Cho.
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Huang, Y., and Liang, S. Y. (March 18, 2004). "Modeling of CBN Tool Flank Wear Progression in Finish Hard Turning ." ASME. J. Manuf. Sci. Eng. February 2004; 126(1): 98–106. https://doi.org/10.1115/1.1644543
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