基于有限体积模拟的模锻优化设计  

Optimum design based FVM for the open-die forging

作　　者：刘德学[1,2] 秦小琼[3] 李俊琛 任淮辉 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [3]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《燕山大学学报》2009年第3期224-227,共4页Journal of Yanshan University

基　　金：国家自然科学基金资助项目(50571042)

摘　　要：在锻造等金属大变形的工艺设计中,相关参数的确定很大程度上依赖于经验公式,而有限元法在金属大变形过程数值模拟中有明显的局限性,且模拟结果难以验证。本文基于有限体积法模拟了一典型开式模锻过程,并在通用经验值允许的范围内,根据模拟结果调整工艺设计中的参数设置,有效避免了一种锻件常见缺陷。通过分析变形过程特定时段的变形区形状、分流面的变化及变形力分布曲线,结合相关塑性理论验证了模拟结果的正确性,实现了工艺优化设计。研究证明理论预测与数值模拟相"拟合"的方法可以代替实验用于指导生产实践。Many processing parameters are calculated with empirical equation in technological design about metal large deformation. Otherwise, there is limitation for the numerical simulation of metal large deformation processing with FEM. It is also difficult for the certification of simulation result. In this paper, a typical open-die forging processing was simulated based on FVM. According to the simulation result, some processing parameters were adjusted in a proper extent. And a common defect of forge piece can be avoided in this way. By analyzing the deformed area, material flow and force-travel curve, the simulation result was certified with related plastic theory. Optimum design can be realized in the same time. It is approved that the method bonding theoretical prediction and numerical simulation together can be used for productive practice in place of experiment.

关 键 词：开式模锻 有限体积法 变形区 分流面 力-行程曲线 

分 类 号：TG316[金属学及工艺—金属压力加工]