碳纤维复合材料激光加工成本优化

Optimization of Laser Operating Cost for Carbon Fiber Reinforced Polymer

碳纤维复合材料(carbon fiber reinforced polymer, CFRP)具有高强轻质的优点,广泛应用于航空航天、汽车等行业.其传统的机械加工方式存在成本高、效率低及加工质量差等问题.激光加工通过对不同工艺参数的适当控制,可以实现微型化、超精密的切割.目前国内外学者在激光加工质量方面已取得较多成果,但缺少对加工成本的研究.分析了激光加工的成本构成,建立了激光加工工艺参数与加工成本的数学模型.并将该模型与已建立的激光加工热影响区宽度预测模型相结合,作为目标函数,采用NSGA-Ⅱ算法对工艺参数进行优化.获得了Pareto前沿面和Pareto最优解,可根据加工成本预算或所需要的热影响区宽度进行参数选择,完成对激光加工成本及加工质量的可控研究,对激光加工碳纤维复合材料的实际工程应用具有一定的参考价值.

Carbon fiber reinforced polymer(CFRP)has the advantages of high strength and light weight,and is widely used in aerospace,automobile and other industries.However,traditional processing methods are facing problems such as high cost,low efficiency and poor precision.Laser beam cutting may be applied for the miniaturization and ultra-precision cutting and/or finishing by appropriate control of different process parameter.At present,domestic and foreign scholars have made many achievements in laser machining quality;however,there is a lack of research on operating cost.Therefore,the cost structure of laser machining was analyzed,and a mathematical model of laser machining parameters and operating cost was established in this paper.Combining this model with the established prediction model of laser machining heat-affected zone width as the objective function,the NSGA-Ⅱalgorithm was used to optimize the process parameters.The Pareto frontier and the Pareto optimal solution were obtained.Parameters can be selected according to the operating cost budget or the required heat affected zone width.The cost and quality of laser machining can be controlled.It provides a reference for laser machining of CFRP.