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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。
In order to study the wear mechanism and regularity of cutting tool in different parts of carbon fiber reinforced plastic (CFRP) composite cutting, a typical cemented carbide double top corner bit was taken as the research object, which mainly studied the horizontal cutting edge The wear mechanism and regularity of the second main cutting edge, which have a great influence on the final hole forming. The process of decay of the chisel edge and the second main cutting edge during machining was characterized by reducing the wear measurement interval and introducing the blunt radius of the cutting edge and the width of the flank wear band. Based on the observation of the micro-blade edge and the change of the radius of the blunt circle, the wear mechanism of re-sharpening the chisel edge and the wear of the second main cutting edge was revealed. At the same time, based on the above wear characterization, the influence of different cutting parts wear on drilling axial force and moment is studied. Main cutting edge flank wear changes consistent.