基于变形均匀性的锻造预成形优化系统集成

预成形优化设计在锻造工艺设计中得到了广泛的应用,锻件的变形均匀性是衡量锻件质量的一个重要指标,提高锻件的变形均匀性以提高锻件的综合质量。本文以提高锻件变形均匀性为优化设计目标,采用基于灵敏度分析的正向模拟优化法对锻造过程的预成形模具形状优化系统集成进行了研究,给出了目标函数、设计变量及其灵敏度的表达形式,解决了优化模拟过程中的网格再划分问题,给出了优化系统的流程图并编制了相应的程序,最后,给出了一个优化设计的数值算例,取得了较好的优化效果。

Integration of Preform Optimization Design System in Forging Process Based on Deform Uniformity

The preform optimal design is widely used in the forging process design. The deform uniformity of the forging is an important factor of the forging. Improving the deform uniformity of the forging can increase the quality of the forging, therefore, optimization of the deform uniformity has very important value in forging optimization. In this paper, the integration of the preform optimization design system in forging process is studied. The deform uniformity of the forging is used as the optimization objective; the forward simulation optimization method based on the sensitivity analysis is used as the optimization method. The objective function and the sensitivity of the objective function to the optimal design variable are given. The problem of the mesh re division during the optimization simulation is solved. The flow chart of the optimization system is given and the program is developed. Using the program, an optimization example is given. The optimization result is very satisfactory.