锻压技术

高筋薄腹板类锻件三维预成形设计及优化

英文标题：3D preforming design and optimization of forging with high rib and thin web

作者：张晗郑志镇李建军汪继勇

单位：华中科技大学

分类号：TG316

出版年,卷(期):页码：2014,39(2):12-16

摘要：

高筋薄腹板类锻件通常具有较大的尺寸和较复杂的内腔，需要在锻造成形过程中进行合理的预成形设计。提出了一种三维预成形设计方法，以一个典型的高筋薄腹板类锻件为例，根据静电场与锻造速度场分布的相似性，用静电场等势面模拟获得其预锻形状；然后利用Deform-3D进行锻造模拟，对预锻形状进行验证和评估；最后通过构建神经网络，建立了毛坯尺寸、等势面电势值和等效应变差值、锻件填充率的映射关系，并结合遗传算法搜索最优解，实现了毛坯和预锻件的联合优化设计。结果表明，本方法可以快速而准确地设计出预成形件，可靠性较高。

Forgings with high rib and thin web usually have large size and complex cavity. A rational preform design must be carried out in forging process. A method of 3-D preform design was presented and adopted for a typical high rib and thin web forging. According to the similarity of electrostatic field and forging velocity field, equipotential surface was used to describe the shape of preform. In this method, FEM software Deform-3D was employed to verify and evaluate the shape of preform through simulation of preform process. Next, a neural network was built to establish the mapping relationship between billet dimension, potential value of equipotential surface and equivalent strain difference, filling ratio, then optimum was obtained by using genetic algorithms, the joint optimization of billet and preform was achieved finally. The results show that the method can design the preform forgings efficiently and accurately, and has good reliability.

基金项目：

国家科技重大专项资助项目（2009ZX04005-011，2012ZX04010-081）

张晗（1990-），男，硕士研究生

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