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首页> 外文期刊>Composite Structures >On the analysis of temperatures, surface morphologies and tool wear in drilling CFRP/Ti6A14V stacks under different cutting sequence strategies
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On the analysis of temperatures, surface morphologies and tool wear in drilling CFRP/Ti6A14V stacks under different cutting sequence strategies

机译：在不同切削顺序策略下钻CFRP / Ti6A14V烟囱的温度，表面形貌和刀具磨损的分析

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In drilling CFRP/Ti6Al4V stacks, the cutting sequence strategy, which determines the coupling effects of each phase machining, affects significantly the machinability of the sandwiched material as well as the tool wear characteristics. The present paper contributes to a scientific understanding of the effects of different cutting sequence strategies on the drilling performance of multilayer CFRP/Ti6Al4V stacks when using uncoated tungsten carbide and diamond-coated drills. Experimental quantification of the in-situ temperatures during the stack drilling was conducted using the method of infrared thermography camera and the instrumentation of drill bits by embedded thermocouples. Drilling forces, exit burr heights of the titanium holes, surface morphologies of the composite holes and tool wear signatures were analyzed. The results indicate that drilling from titanium to CFRP leads to higher magnitudes of the composite cutting temperatures while it benefits the reduction of the stack thrust forces, the improvement of the composite surface morphologies as well as the decrease of the exit titanium burr heights. Additionally, the coupling effects of drilling temperatures and chip adhesion are the influential factors leading to the disparate effects of the cutting sequence strategy on the drill wear progression. Drilling from titanium to CFRP reduces the drill adhesion and flank wear extents owing to the brushing effects of the composite drilling. The diamond-coated drills are confirmed superior to the uncoated ones in terms of lower drilling temperatures, lower drilling forces, minimal hole surface damage, less tool wear while machining the CFRP/Ti6Al4V stacks.
机译：在钻孔CFRP / Ti6Al4V叠层中，确定每个阶段加工的耦合效果的切削顺序策略会显着影响夹层材料的可切削性以及刀具的磨损特性。本文有助于科学理解不同的切削顺序策略对使用未涂层的碳化钨和金刚石涂层的钻头时多层CFRP / Ti6Al4V叠层的钻孔性能的影响。使用红外热像仪的方法和埋入式热电偶对钻头的测量，对堆放钻孔过程中的原位温度进行了实验量化。分析了钻孔力，钛孔的出口毛刺高度，复合孔的表面形态和刀具磨损特征。结果表明，从钛到CFRP的钻孔会导致更高的复合切削温度，同时有利于降低堆垛推力，改善复合材料的表面形态以及降低出口钛毛刺高度。此外，钻削温度和切屑粘附的耦合效应是导致切削顺序策略对钻头磨损进程产生不同影响的影响因素。由于复合钻的刷牙作用，从钛到CFRP的钻削降低了钻头的附着力和侧面磨损程度。在加工CFRP / Ti6Al4V烟囱时，金刚石涂层钻头在较低的钻孔温度，更低的钻孔力，最小的孔表面损伤，更少的刀具磨损方面被证实优于未涂层的钻头。

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