During high-speed machining of aeronautical monolithic components, the initial residual stresses will cause the workpiece deformations with the removal of material. Therefore, it is crucial to investigate the prediction and control of workpiece deformations for the achievement of a machining process with high efficiency and precision. Above all, the mechanical model is established for the deformation analysis of 7075 aluminum alloy aeronautical monolithic components. Based on the formulated theoretical model, the finite element model is also suggested for the solution of the workpiece deformation. The comparison between the calculated values and the simulated results shows that they are in good agreement with each other. Subsequently, the presented method is adopted to reveal the fact that the different machining positions will cause different workpiece deformations. The deformation experiments are carried out at two machining positions of the workpiece. The measurement results show that whether for the amplitude or the deformation curve, the simulated results are in accordance with the measured data. The relative errors of two groups of data are 9.26% at position 16.5 mm and 19.66% at position 9 mm. Finally, an optimal model is created for the minimum deformation as well as the corresponding step decrease iterative solution method so that the proper machining position is achieved when the step is within the given threshold value. In comparison with the middle position method which is usually adopted by the enterprises, the optimal machining position, obtained by the presented step decrease iterative method, can decrease machining deformations by 99.79%.

在航空整体零件的高速加工过程中，初始残余应力将导致工件变形并去除材料。因此，研究工件变形的预测和控制对于实现高效率和高精度的加工过程至关重要。首先，建立了用于7075铝合金航空整体部件变形分析的力学模型。在建立的理论模型的基础上，提出了有限元模型来解决工件变形问题。计算值和模拟结果之间的比较表明，它们彼此之间具有很好的一致性。后来，该方法被用来揭示不同的加工位置会导致不同的工件变形的事实。变形实验在工件的两个加工位置进行。测量结果表明，无论是振幅还是变形曲线，仿真结果均与实测数据吻合。两组数据的相对误差在位置16.5 mm处为9.26％，在位置9 mm处为19.66％。最后，为最小变形以及相应的步长减小迭代求解方法创建一个最佳模型，以便当步长在给定阈值内时获得正确的加工位置。与企业通常采用的中间位置方法相比，最佳加工位置