Li Xueguang, Wang Yahui, Miao Liqin, Zhang Wang
College of Mechanical and Electrical Engineering, Changchun University of Science and Technology, Changchun 130022, China.
Sinohydro Bureau 11 Co., Ltd., Zhengzhou 450000, China.
Micromachines (Basel). 2022 Apr 27;13(5):683. doi: 10.3390/mi13050683.
As a difficult-to-process material, Inconel718 nickel-based superalloy is more and more widely used in aerospace, ocean navigation, and large-scale machinery manufacturing. Based on ABAQUS simulation software, this paper takes the milling force and temperature in the milling process of the nickel-based superalloy as the research object, and establishes the empirical formula for the prediction model of cutting force and cutting temperature based on the method of multiple linear regression. The significance of the prediction model was verified by the residual analysis method. Through data analysis, it is obtained: within a certain experimental range, the influence degrees of each milling parameter on the cutting force and cutting temperature are fz>ap>n and fz>ap≈n, respectively. The actual orthogonal cutting test was carried out on the machine tool, and the reliability and accuracy of the prediction model of cutting force, cutting temperature and tool wear amount were verified. The model formulas of the shear velocity field, shear strain field and shear strain rate field of the main shear deformation zone are constructed by using mathematical analysis methods. The influence law of cutting speed and tool rake angle on the variables of main shear zone is calculated and analyzed. Through the combination of theory and experiment, the relationship between cutting force, chip shape and machined surface quality in milling process was analyzed. Finally, with the increase in the cutting force, the serration of the chip becomes more and more serious, and the roughness of the machined surface becomes greater and greater.
作为一种难加工材料，Inconel718镍基高温合金在航空航天、海洋航行及大型机械制造等领域的应用越来越广泛。基于ABAQUS仿真软件，本文以镍基高温合金铣削过程中的铣削力和温度为研究对象，采用多元线性回归方法建立了切削力和切削温度预测模型的经验公式。通过残差分析方法验证了预测模型的显著性。经数据分析得出：在一定实验范围内，各铣削参数对切削力和切削温度的影响程度分别为fz>ap>n和fz>ap≈n。在机床上进行了实际正交切削试验，验证了切削力、切削温度及刀具磨损量预测模型的可靠性和准确性。运用数学分析方法构建了主剪切变形区的剪切速度场、剪切应变场和剪切应变率场的模型公式。计算并分析了切削速度和刀具前角对主剪切区各变量的影响规律。通过理论与实验相结合，分析了铣削过程中切削力、切屑形状与已加工表面质量之间的关系。最后，随着切削力的增大，切屑的锯齿化越来越严重，已加工表面粗糙度越来越大。
