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首页> 外文会议>Emerging technology in precision engineering XIV >Edge Sharpening and Surface Modification of PcBN Cutting Tool by Pulsed Laser Grinding
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Edge Sharpening and Surface Modification of PcBN Cutting Tool by Pulsed Laser Grinding

机译：脉冲激光磨削PcBN刀具的刃口锋利和表面改性

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摘要

PcBN cutting tools have excellent characteristics such as high degree of hardness and low chemical reactivity, so they have the 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 shape a 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 sharper 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 percent 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 the 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 a good performance rather than a commercial tool with diamond grinding finish.
机译：PcBN切削刀具具有诸如高硬度和低化学反应性之类的优异特性，因此它们有潜力用高精度切削来代替淬硬钢的高精度磨削。如果可以实现可成形性和良好的表面改性，则PcBN可能是更有效的工具材料。为了解决这些问题，应用脉冲激光研磨（PLG）来成形切削刃并精加工前刀面。用PLG加工后，用扫描电子显微镜（SEM）观察成形的切削刃，并用接触式轮廓仪测量。结果，由PLG处理的切削刃与常规金刚石磨削的切削刃相似或更锋利。另外，作为表面改性的作用之一，PLG后前刀面的维氏显微硬度增加了约10％。另一方面，根据具有侧向力显微镜的摩擦试验，前刀面的摩擦系数减小了普通表面的一半。依靠PLG的这些优点，使用PLG加工的工具对硬度为58HRC的淬硬钢进行高精度车削，可以证明其具有良好的性能，而不是商用的金刚石磨削工具。

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