锻压技术

Invar36铁镍合金厚板热压成形框架模具的数值模拟与验证

英文标题：Numerical simulation and verification on hot stamping frame die for Invar36 iron-nickel alloy thick plate

分类号：TB33; TG76; V261

出版年,卷(期):页码：2023,48(7):184-191

摘要：

为解决Invar36铁镍合金复材工装模板成形效果差的问题，通过高温压缩实验，研究了Invar36铁镍合金的高温热变形行为，采用刚塑性有限元法，利用高温压缩实验所得到的材料参数，建立了Invar36铁镍合金厚板热压成形框架模具有限元模型，通过有限元仿真分析研究了不同横纵筋条间距对零件成形效果的影响，并总结了框架式热压模具成形时零件的变形特点。结果表明：在上下模无筋条支撑的区域中，由于零件脊线部位的曲率变化最大、变形量最大，而又无型面支撑，成形效果最差。因此，提出了在零件的脊线部位增加支撑筋条的方案，改进框架式热压模具的结构，并通过热压成形实验，验证了改进的热压模具结构的有效性。

In order to solve the problem of poor forming effect of composite material tooling template for Invar36 iron-nickel alloy, the high-temperature hot deformation behavior of Invar36 iron-nickel alloy was studied by high-temperature compression experiments, and the finite element model of hot stamping frame die for Invar36 iron-nickel alloy thick plate was established by rigid-plastic finite element method and material parameters obtained from high-temperature compression experiments. Then, the influences of different transverse and longitudinal rib spacings on the forming effect of part were studied by the finite element simulation analysis, and the deformation characteristics of part during the forming process for the frame hot stamping die were summarized. The results show that in the area where the upper and lower dies are not supported by ribs, and the forming effect is the worst because the curvature change at the ridge line of part and the deformation are the largest, and there is no surface support. Therefore, a scheme of adding support ribs at the ridge line of part is proposed to improve the structure of frame hot stamping die, and the effectiveness of the improved hot stamping die structure is verified by hot stamping experiments.

基金项目：

作者简介：邹震宇（1990-），男，硕士，工程师 E-mail：zzz2001118@qq.com

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