Composite laminates are gorgeous for several applications such as aerospace and aircraft structural components due to their excellent properties. Typically, mechanical drilling has been important machining operation for components made of composite laminates. Nevertheless, laminated composites are considered as hard-to-machine material which results in low drilling efficiency and drilling-induced delamination which is undesirable. This paper reviews the experiments during drilling of CFRP/Al stacked and sandwich composites. The machinability facets of these material stacks has been generally used in aerospace applications, it has been studied based on impact of drill material, drill geometries, and drilling process parameters such as speed and feed. Composite material requires high spindle speed and low feed rate, whereas drilling aluminum requires stability between speedsto feed rate. The review reports essential results and gap in the collected literature for CFRP/Al stacked and sandwich composites. A compromise between several parameters is required during drilling of multi-material stacks. The problems and solutions allied to drilling of multi-material stacks are deliberated and the directions in which the research on drilling of multi-materials may be carried out are suggested in this paper. It is intended to assist readers to acquire a thorough view on mechanical drilling of laminated composite.

中文翻译：

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切削条件对 CFRP/Al 叠层复合材料钻孔的影响

由于其优异的性能，复合层压板非常适用于多种应用，例如航空航天和飞机结构部件。通常，机械钻孔一直是复合层压板部件的重要加工操作。然而，层压复合材料被认为是难以加工的材料，这导致钻孔效率低和钻孔引起的分层，这是不希望的。本文回顾了 CFRP/Al 叠层和夹层复合材料钻孔过程中的实验。这些材料堆的可加工性面已普遍用于航空航天应用，已根据钻头材料、钻头几何形状和钻孔工艺参数（如速度和进给）的影响对其进行了研究。复合材料要求高主轴转速和低进给率，而钻铝需要速度和进给速度之间的稳定性。该评论报告了 CFRP/Al 堆叠和夹层复合材料收集的文献中的基本结果和差距。在钻孔多材料堆叠期间需要在几个参数之间进行折衷。探讨了多材料叠层钻孔的相关问题和解决方案，并提出了多材料钻孔的研究方向。它旨在帮助读者全面了解层压复合材料的机械钻孔。探讨了多材料叠层钻孔的相关问题和解决方案，并提出了多材料钻孔的研究方向。它旨在帮助读者全面了解层压复合材料的机械钻孔。探讨了多材料叠层钻孔的相关问题和解决方案，并提出了多材料钻孔的研究方向。它旨在帮助读者全面了解层压复合材料的机械钻孔。