锻压技术

基于有限元分析的汽车法兰盘连接件精密锻造工艺

英文标题：Precision forging process on automotive flange connection part based on finite element analysis

作者：田亚丁1 朱绘丽2

分类号：TG316.3

出版年,卷(期):页码：2023,48(12):9-17

摘要：

以一种汽车法兰盘连接件为研究对象，针对生产效率低、成本高、性能差的问题，尝试将多工位自动精密热锻技术应用于生产。根据成形理论制定了预锻、终锻、冲孔3工位锻造方案，并设计了3种不同形状的预锻件；利用热压缩试验得到了锻造材料40CrNiMo钢的流变曲线，并拟合获得了本构方程；利用Deform-3D软件模拟了不同方案下法兰盘连接件的成形过程，根据金属网格流线情况和填充质量分析了各工艺的可靠性；比较了不同方案下的成形载荷和锻件温度的分布情况，并基于模具磨损模型预测了锻模的磨损情况，确定了最佳方案；开展了法兰盘连接件的多工位热锻试验，试验结果与预测结果一致，各工位锻件成形良好，无缺陷，尺寸性能满足要求，并且锻造过程稳定、速度快。

For the problems of low production efficiency, high cost and poor performance of a type of automotive flange connection part, the multi-station automatic precision hot forging technology was attempted to apply to the production. Then, based on the forming theory, a 3-station forging plan of pre-forging, final forging and punching was formulated, and three different shapes of pre-forgings were designed. Furthermore, the rheological curve of forging material 40CrNiMo steel was obtained by hot compression test, and the constitutive equation was fitted. The forming processes of flange connection part under different schemes were simulated by using software Deform-3D, and the reliability of each process was analyzed based on the streamline situation of metal grid and the filling quality. The forming load and temperature distribution of forgings under different schemes were compared, and the wear of forging mold was predicted based on the mold wear model, and the optimal scheme was determined. Finally, a multi-station hot forging test of flange connection part was conducted, and the test results are consistent with the predicted results, the forgings at each station are well formed without defects, the dimensional performance meets the requirements, and the forging process is stable and fast.

基金项目：

2022年度河南省科技厅科技攻关项目（232102220092）

作者简介：田亚丁（1976-），男，本科，副教授 E-mail：xixihaha1217@aliyun.com

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