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Abstract：
Nickel-based superalloy Inconel 718 is widely used in the aerospace industry for its excellent high-temperature strength and thermal stability. However, milling Inconel 718 presents challenges because of the significantly increased cutting force and vibration, since Inconel 718 is a typical difficult-to-machine material. This paper takes the milling process of Inconel 718 as the research object, initially, and a milling force model of Inconel 718 is established. Subsequently, the finite element analysis method is used to analyze the stress field, temperature field, and milling force in the milling process of Inconel 718. Building upon this, a dynamic equation of the milling of Inconel 718 is established, and based on the modal experiment, stability lobe diagrams are drawn. Furthermore, milling experiments on Inconel 718 are designed, and the results calculated using the milling force model and finite element analysis are verified through comparison to the experimental results; then, the fmincon optimization algorithm is used to optimize the processing parameters of Inconel 718. Eventually, the results of the multi-objective optimization illustrate that the best processing parameters are a spindle speed of 3199.2 rpm and a feed speed of 80 mm/min with an axial depth of cut of 0.25 mm. Based on this, the best machining parameters are determined, which point towards an improvement of the machining efficiency and quality of Inconel 718.
摘要：
镍基高温合金Inconel718以其优异的高温强度和热稳定性被广泛应用于航空航天工业。然而,铣削Inconel718提出了挑战，因为切削力和振动显着增加，因为Inconel718是一种典型的难加工材料。本文以Inconel718的铣削加工为研究对象,最初,建立了Inconel718的铣削力模型。随后，采用有限元分析方法对应力场进行分析,温度场,Inconel718铣削过程中的铣削力。在此基础上，建立了Inconel718铣削的动力学方程，基于模态实验，绘制了稳定性叶瓣图。此外，设计了Inconel718的铣削实验，通过与实验结果的对比,验证了铣削力模型和有限元分析的计算结果;Fmincon优化算法用于优化Inconel718的加工参数。最终,多目标优化结果表明，最佳加工参数是主轴转速为3199.2rpm，进给速度为80mm/min，轴向切削深度为0.25mm。基于此,确定最佳加工参数，这指向提高Inconel718的加工效率和质量。
