双顶角钻头钻削CFRP复合材料的刀具磨损机制

发布时间：2018-02-24 02:53

本文关键词： 碳纤维增强树脂基复合材料双顶角钻头磨损机制切削刃钝化后刀面磨损　出处：《复合材料学报》2017年04期 　论文类型：期刊论文

【摘要】：为了研究碳纤维增强树脂基(CFRP)复合材料切削中刀具在不同部位的磨损机制和规律,以典型的硬质合金双顶角钻头作为研究对象,主要研究对出口分层影响较大的横刃和对最终制孔成型影响较大的第二主切削刃的磨损机制及规律。通过减小磨损测量间隔,并引入切削刃钝圆半径以及后刀面磨损带宽度,表征了横刃和第二主切削刃在加工中的衰变过程。基于显微刃口观测和钝圆半径变化,揭示横刃易崩刃和第二主切削刃磨损后又受到重新刃磨的磨损机制,获得了此类型钻头不同部位的磨损规律。同时,基于上述的磨损表征,研究不同切削部位磨损量对钻削轴向力和力矩的影响,横刃轴向力与横刃钝圆半径变化相关性较小,而钻削最大力矩与第二主切削刃后刀面磨损变化规律相一致。
[Abstract]:In order to study the wear mechanism and regularity of cutting tools in different parts of carbon fiber reinforced resin matrix CFRP (CFRP) composite cutting, the typical cemented carbide double-vertex bit was used as the research object. The wear mechanism and law of the second main cutting edge, which has a great influence on the exit delamination and the final hole making, are studied. By reducing the wear measurement interval, the radius of the cutting blunt edge and the width of the wear band on the rear face are introduced. The decay process of the chisel and the second main cutting edge in machining is characterized. Based on the observation of the micro cutting edge and the change of the obtuse circle radius, the wear mechanism of the edge is easy to collapse and the second main cutting edge is worn and then resharpened. The wear rules of different parts of the drill are obtained. Based on the above wear characterization, the influence of different cutting positions on the axial force and torque of drilling is studied. The correlation between the axial force of the cutting edge and the radius of the blunt circle of the cutting edge is relatively small. The maximum torque of drilling is consistent with the change of tool surface wear behind the second main cutting edge.
【作者单位】：大连理工大学机械工程学院;
【基金】：国家973计划课题(2014CB046503) 国家自然科学基金(51575082;U1508207)
【分类号】：TB332

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