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IJAT Vol.10 No.5 pp. 753-758
doi: 10.20965/ijat.2016.p0753
(2016)

Paper:

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Wheel Life and Cutting-Edge Wear in Mirror-Grinding Using a Coarse-Grained cBN Wheel Treated by Microdressing

Yoshio Ichida†

CBN & Diamond Nanomachining Institute
7-5-8 Yoto, Utsunomiya, Tochigi 321-0904, Japan

†Corresponding author

Received:
January 8, 2016
Accepted:
July 15, 2016
Published:
September 5, 2016
Creative Commons License
Keywords:
mirror-grinding, cBN grinding wheel, wheel life, wheel wear, microdressing, surface roughness
Abstract
This paper presents the wheel life and wear behavior of the cutting edges of a coarse-grained, microdressed cubic boron nitride (cBN) wheel used in mirror-grinding of hardened roll-steel. Many grain-cutting edges with smooth, ductile-mode cut surfaces and numerous brittle-mode-fractured micro dents are formed on the wheel’s working surface after microdressing with a fine-grained diamond dresser. Cylindrical mirror-grinding experiments are conducted using a metal-bonded cBN wheel with a mesh size of #140 (Average grain size da =105 μm). A mirror surface with a roughness below 0.2 μm Rz can be efficiently formed with the wheel surface treated by the abovementioned microdressing method. This wheel surface can perform mirror-grinding with precision for more than nine hours. A flat plane formed via attritious wear of the cutting edge gradually extends with increasing accumulated stock removal, and simultaneously, the unevenness due to wear streaks on this flat plane increases. This increase in the unevenness of the worn flat plane is the main factor causing an increase in the roughness of the mirror surface.
Cite this article as:
Y. Ichida, “Wheel Life and Cutting-Edge Wear in Mirror-Grinding Using a Coarse-Grained cBN Wheel Treated by Microdressing,” Int. J. Automation Technol., Vol.10 No.5, pp. 753-758, 2016.
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