CFRP/Ti叠层构件钻孔工艺参数多目标优化方法

doi:10.3901/JME.2020.07.193

摘要/Abstract

摘要： 碳纤维增强复合材料/钛合金(CFRP/Ti)叠层构件以其优异性能广泛应用于航空航天领域。为保证孔同轴度和加工效率，通常采用同一参数对CFRP/Ti叠层构件进行一体钻孔。而CFRP和钛合金的材料属性和切削性能各异，一体钻孔会出现不同程度的CFRP撕裂、钛合金出口毛刺、孔径偏差等多种质量缺陷。由于工艺参数对各个质量缺陷的影响不同，甚至存在矛盾，难以找到合适的参数使得各质量缺陷均达到最小。为得到最优工艺参数，提高钻孔综合质量，对CFRP/Ti叠层构件钻孔工艺参数多目标优化方法进行了研究。根据实际工艺情况建立了CFRP/Ti叠层构件钻孔工艺参数多目标优化模型；结合钻孔工艺参数离散化的特点，基于帕累托占优原理构建了帕累托最优工艺参数集穷举搜索算法，并基于宽容分层序列法构建最优工艺参数决策算法；以T700-TDE85/Ti-6Al-4V叠层构件为对象，得到了最优工艺参数，验证了方法的可行性和有效性。

关键词: CFRP/Ti叠层, 多目标优化, 工艺参数, 帕累托最优, 宽容分层序列法

Abstract: Carbon fiber reinforced plastics and titanium (CFRP/Ti) stacks are widely used in aerospace field because of their excellent performance. In order to ensure the coaxiality of the hole and processing efficiency, the same parameters are usually used to drill CFRP/Ti stacks. The material properties and cutting properties of CFRP and titanium alloys are different. There are many quality defects in the integrated drilling, such as CFRP tearing, burr at the exit of titanium alloys, hole diameter deviation and so on. It is difficult to find the appropriate parameters to minimize the quality defects due to the different influence of process parameters on each quality defect or even the contradiction. In order to obtain the optimum drilling parameters and improve the comprehensive quality of drilling, the multi-objective optimization method of drilling parameters for CFRP/Ti stacks is studied. A multi-objective optimization model for drilling parameters of CFRP/Ti stacks is established according to the actual process conditions. Combining the characteristics of discretization of drilling parameters, an exhaustive search algorithm for Pareto optimal process parameters set is constructed based on Pareto dominance principle, and an optimal process parameters decision algorithm is constructed based on forbearing stratified sequencing method. Taking T700-TDE85/Ti-6Al-4V stacks as the object, satisfactory optimal process parameters are obtained, and the feasibility and validity of the method are verified.

Key words: CFRP/Ti stacks, multi-objective optimization, process parameters, pareto optimization, forbearing stratified sequencing method

中图分类号:

TH16

刘书暖, 夏文强, 王宁, 宋晔, 骆彬, 张开富. CFRP/Ti叠层构件钻孔工艺参数多目标优化方法[J]. 机械工程学报, 2020, 56(7): 193-203.

LIU Shunuan, XIA Wenqiang, WANG Ning, SONG Ye, LUO Bin, ZHANG Kaifu. Multi-objective Drilling Parameters Optimization Method for CFRP/Ti Stacks[J]. Journal of Mechanical Engineering, 2020, 56(7): 193-203.

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