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The effect of cutting tool coating on the form and dimensional errors of machined holes in GLARE® fibre metal laminates
The International Journal of Advanced Manufacturing Technology ( IF 3.4 ) Pub Date : 2020-03-27 , DOI: 10.1007/s00170-020-05211-2
K. Giasin , J. Hawxwell , J. Sinke , H. Dhakal , U. Köklü , E. Brousseau

Abstract

Fibre metal laminates (FMLs) are multilayered metal composite materials currently used in aeronautical structures, especially where fatigue and impact resistance are required. FMLs are produced in large panels and often require assembly using the drilling process for riveting purposes. Hole making is a critical machining process in the joining and assembly of aeronautical components, which has to meet stringent tolerance requirements. This paper reports a systematic analysis of hole integrity when drilling an FML known as GLARE®. In particular, the primary objective is to investigate the impact of three different drill coatings (TiAlN, TiN and AlTiN/TiAlN), against several important hole parameters: thrust force, hole size, circularity, cylindricity and perpendicularity. The results show that TiAlN-coated drills produced the highest thrust force, while TiN-coated drills produced holes with the lowest deviation between the hole diameter measured at the entry and the exit and that the drill coating was the most influential parameter for the resulting hole size. TiAlN-coated drills resulted in the highest circularity at the upper part of the hole, while hole cylindricity tended to be best when using AlTiN/TiAlN- and TiN-coated drills. The ANOVA analysis shows that the drill coating and the spindle speed had a significant influence on hole size and circularity, while drill coating was the only influential parameter on hole cylindricity, and spindle speed was the only contributing parameter on hole perpendicularity. Finally, scanning electron microscopy analyses showed two distinct hole wall surface damage phenomenon due to broken fibres and evacuated metallic chips.



中文翻译:

刀具涂层对GLARE®纤维金属层压板中加工孔的形状和尺寸误差的影响

摘要

纤维金属层压板(FML)是目前在航空结构中使用的多层金属复合材料,尤其是在需要疲劳和抗冲击性的地方。FML生产于大型面板中,通常需要使用钻孔工艺进行组装以达到铆接目的。孔加工是航空零件连接和组装中的关键加工过程,必须满足严格的公差要求。本文报告了在钻孔称为GLARE®的FML时对孔完整性的系统分析。特别是,主要目的是研究三种不同的钻孔涂层(TiAlN,TiN和AlTiN / TiAlN)对几个重要的孔参数的影响:推力,孔尺寸,圆度,圆柱度和垂直度。结果表明,TiAlN涂层钻头产生的推力最大,TiN涂层的钻头产生的孔在入口和出口测得的孔直径之间的偏差最小,并且钻头涂层对最终孔的大小影响最大。TiAlN涂层钻头在孔的上部具有最高的圆形度,而使用AlTiN / TiAlN和TiN涂层钻头时孔的圆柱度往往最好。方差分析表明,钻削涂层和主轴转速对孔的大小和圆度有显着影响,而钻削涂层是唯一影响孔圆柱度的参数,主轴转速是唯一影响孔垂直度的参数。最后,扫描电子显微镜分析显示出两种明显的孔壁表面损坏现象,这是由于纤维断裂和排空的金属屑所致。

更新日期:2020-03-27
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