Research on milling strategies to reduce delamination damage during machining of holes in CFRP/Ti stack
Research on milling strategies to reduce delamination damage during machining of holes in CFRP/Ti stack
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DOI：
10.1016/j.compstruct.2018.06.011
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发表时间：
2018-09
影响因子：
6.3
通讯作者：
Gongdong Wang;S. K. Melly;Nan Li;Tian Peng;Yingchi Li
中科院分区：
文献类型：
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作者：
Gongdong Wang;S. K. Melly;Nan Li;Tian Peng;Yingchi Li
螺旋铣削正被用于加工孔，以便于航空航天工业中的部件组装。它在许多方面上级传统钻孔，包括低切削力，减少刀具磨损和提高孔质量。本研究的主要目的是建立一个更好的方法铣削孔的CFRP/钛堆叠。实验研究了四种策略，并对结果进行了比较，包括推力，分层和温度。在第一种和第二种策略中，人们发现，复合材料层压板经历较少的损伤时，加工配置CFRP/Ti相比，Ti/CFRP。第三和第四种策略采用三个步骤来实现所需的直径，同时交替复合金属堆叠。发现多步骤铣削策略导致最佳质量的孔，因为后续步骤消除了由第一步骤引起的损坏，同时仅利用周边切削，因此力最小。推力被发现有一个几乎线性的关系，与进给速度和主轴转速的所有研究的战略成反比关系。
Helical milling is being adapted to machine holes that facilitate component assembling in the aerospace industry. It is superior to conventional drilling in many ways including low cutting forces, reduced tool wear and improved hole quality. The main objective of this study was to establish a better method of milling holes in CFRP/Ti stack. Four strategies were studied experimentally and the results compared including thrust forces, delamination and temperatures. In the first and second strategies, it was found that composite laminate experience less damage when machined in the configuration CFRP/Ti compared to Ti/CFRP. The third and fourth strategies employed three steps to achieve the required diameter while alternating the composite-metal stack. It was found that a multi-step milling strategy leads to the best quality holes as the subsequent steps eliminate the damage caused by the first step while only utilizing peripheral cutting thus minimum forces. Thrust forces were found to have an almost linear relationship with the feed rates and an inverse relationship with the spindle speeds for all the strategies studied.