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首页> 外文会议>Emerging technology in precision engineering XIV >Formation Mechanism of Grain Cutting Edges in Micro Dressing of Polycrystalline cBN Grinding Wheels
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Formation Mechanism of Grain Cutting Edges in Micro Dressing of Polycrystalline cBN Grinding Wheels

机译：多晶cBN砂轮微修整中晶粒切削刃的形成机理

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摘要

This paper presents a mechanism for the formation of grain cutting edges in the micro dressing of coarse-grain polycrystalline cubic boron nitrite (cBN) grinding wheels using a fine-grain diamond dresser. Many grain cutting edges having a flat surface consisting of ductile smooth surfaces as well as many brittle micro dents, are formed on the working surface of the coarse-grain (#80 mesh) cBN wheel by micro dressing using a fine-grain (#1200 mesh) diamond dresser. This result shows that the flat surfaces of cutting edges on the wheel surface are formed on the basis of a ductile removal process as well as a brittle micro-fracturing of cBN grains by the diamond cutting edges. Moreover, cylindrical grinding experiments with these wheel working surfaces were conducted to clarify the feasibilyty of creating a ground mirror-like surface. As a result, it was confirmed that high-quality mirror surfaces with roughness less than 0.03 μm Ra can be efficiently formed using the working surface prepared by this micro dressing method.
机译：本文介绍了一种使用细晶粒金刚石修整器对粗晶粒多晶立方亚硝酸硼（cBN）砂轮进行微修整时形成晶粒切削刃的机制。通过使用细晶粒（＃1200）进行微修整，在粗晶粒（＃80目）cBN轮的工作表面上形成了许多具有由延展性光滑表面组成的平坦表面以及许多脆性微凹痕的晶粒切削刃网格）钻石修整器。该结果表明，轮缘上的切削刃的平坦表面是基于韧性去除过程以及金刚石切削刃对cBN晶粒的脆性微断裂而形成的。此外，进行了用这些砂轮工作表面进行的圆柱磨削实验，以弄清创建镜面状地面的可行性。结果，证实了使用通过这种微修整方法制备的工作表面可以有效地形成粗糙度小于0.03μmRa的高质量镜面。

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