Edge Sharpening and Surface Modification of PcBN Cutting Tool by Pulsed Laser Grinding


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PcBN cutting tools have excellent characteristics such as high degree of hardness and low chemical reactivity, so they have potential to replace high precision grinding of hardened steel with high precision cutting. PcBN might be more efficient tool material if improvement in formability, and good surface modification can be achieved. In order to solve these problems, Pulsed Laser Grinding (PLG) is applied to a shape cutting edge and to finish a rake face. After processing by the PLG, shaped cutting edges were observed with a scanning electron microscope (SEM) and measured with contact- type profilometer. As a result, cutting edges processed by the PLG are similar or shaper than that by conventional diamond grinding. In addition, as a one of effects of surface modification, The Vickers microhardness of rake faces increases by about 10 present after PLG. On the other hand, according to frictional test with lateral force microscopy, the coefficient of friction of rake face decreases by half of ordinary surface. Depending on these advantages of PLG, high precision turning of hardened steel with 58HRC in hardness by use of the tool processed by PLG can demonstrate good performance rather than a commercial tool with diamond grinding finish.



Key Engineering Materials (Volumes 523-524)

Edited by:

Tojiro Aoyama, Hideki Aoyama, Atsushi Matsubara, Hayato Yoshioka and Libo Zhou




D. Suzuki et al., "Edge Sharpening and Surface Modification of PcBN Cutting Tool by Pulsed Laser Grinding", Key Engineering Materials, Vols. 523-524, pp. 131-136, 2012

Online since:

November 2012




[1] T. Nishiguch, M. Masuda, Precision Cutting of Ferrous Material with Single Crystal CBN Cutting Tools, Journal of JSPE, 54(2), (1988), 384-389.

[2] K. Fujisaki, H. Yokota, N. Furushiro, Y. Yamagata, T. Taniguchi, R. Himeno, A. Makinouchi, T. Higuchi, Development of Ultra-Fine-Grain Binderless cBN Tools for Precision Cutting of Ferrous Materials, Journal of Materials Processing Technology, 209(15-16), (2009).

DOI: https://doi.org/10.1016/j.jmatprotec.2009.05.023

[3] T. Furumoto, T. Ueda, Y. Funada, H. OGURA, Cuttinig Characteristics of CBN Stone and Diamond Stone with Pulsed Nb: YAG Laser, Journal of JSPE, 71(4), (2005), 501.

DOI: https://doi.org/10.2493/jspe.71.501

[4] D. Suzuki, K. Kawata, F. Itoigawa, T. Nakamura, Shape Machining of Sintered Superabrasives Material for Cutting Tools by Nanosecond Pulsed Laser, Proc. of JSPE (Annual meeting), (2010), 277.

[5] T. Nakamoto, E. Shamoto, Y. Yamazaki, Y. Sirakata, Development of Titanium Boride Grinding Wheel by Laser Sintering, Journal of JSME, 72(716), (2006), 370-375.