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结合实验设计和三维弹塑性有限元,在确定性优化设计基础上,提出了不确定因素下薄壁铝合金管数控弯曲的多目标连续稳健优化方法。基于部分析因设计,获得了显著的噪声因子,包括管材性能变化、管材几何尺寸波动和管材-模具摩擦波动。采用田口内外表试验法,考虑主要弯曲成形缺陷,对薄壁铝管数控弯曲芯模直径、芯棒伸出量和助推速度进行了稳健优化设计。通过分别考虑摩擦接触条件、管材料参数和管材几何参数的波动,实现了薄壁铝管数控弯曲芯模直径的稳健性优化设计;通过考虑材料参数波动、芯模与管间的摩擦波动以及芯模直径的制造偏差,实现了芯棒伸出量和助推速度的稳健性优化设计。
Based on the deterministic optimization design, a multi-objective continuous and robust optimization method for numerical control bending of thin-walled aluminum alloy tube under uncertainties was proposed based on experimental design and three-dimensional elasto-plastic finite element method. Based on the partial factorial design, significant noise factors were obtained, including changes in pipe properties, pipe geometry, and pipe-die friction fluctuations. Using Taguchi internal and external surface test method, taking into account the major bending defects, the optimal design of the thin-walled aluminum tube CNC bending core diameter, the mandrel stick out and the boost speed were optimized. By considering the frictional contact conditions, the pipe material parameters and the geometric parameters of the pipe, the optimal design of the pipe diameter of the thin-wall aluminum tube is achieved. By considering the fluctuation of the material parameters, the friction fluctuation between the core and the pipe, Mold diameter manufacturing deviation, to achieve the mandrel extension and boost speed robust optimization design.