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论文类型：会议论文

发表时间：2017-01-01

卷号：2017-August

摘要：Drilling pilot holes on Titanium/CFRP stacks components is inevitable for assembling process in manufacturing industries. However, drilling of such laminated composite is a challenging task to manufacturing engineers because of differential physical and mechanical properties and performance mutation at the interface. Therefore, it is important to choose the advisable variable machining parameters regarding the sequence of stacks and makes use of appropriate drill geometry in order to achieve low damage and precise holes. In the article, a novel step drill is proposed with special margins structure on its second stage. A contrast experiment of two different machining parameters in drilling the Ti/CFRP stacks is designed. The thrust force, delamination factor and the holes diameter are obtained, and the influence of step drill with different machining parameters is derived. It is found that in the Parameter A, the step drill has a better performs. The length of the First stage of the drill has an important influence on the quality of the processing and the choice of the process. The better processing quality can be obtained, when the length of the first stage of the drill is suitable. © 2017 International Committee on Composite Materials. All rights reserved.