锻压技术

反挤压筒形件成形力研究

英文标题：Study on forming force of cylindrical part in backward extrusion

作者：任杰王强冀翠斌刘涛

关键词：滑移线法空心坯料反挤压

分类号：TG376

出版年,卷(期):页码：2015,40(11):122-126

摘要：

采用滑移线方法分别分析了反挤压成形筒形件时的新工艺（反挤压空心坯料）与传统工艺（反挤压实心坯料）的金属流动情况，提出了与金属流动情况相容的滑移线场，并在此基础上分别推导出了两种不同工艺的成形力公式。应用Deform-3D软件对两种不同工艺方案进行了数值模拟。将得到的结果与公式计算得到的结果比较，误差约为2%。对比发现，反挤压空心坯料能够有效降低成形力，并且成形力的大小与空心坯料的内孔直径大小有关。通过对比两种不同工艺成形铝合金轮辋时的成形力验证了这一结论。

The metal flows under the new technology（backward extrusion of hollow billets）and the traditional process（backward extrusion of solid billets）of backward extrusion cylindrical part were analyzed respectively by slip line method, and the slip line field that was compatible with the metal flow was put forward. Based on the above, the formulas of forming forces under two different processes were deduced. Two different schemes were also simulated by Deform-3D software. Comparing the simulated results with the calculated results, the error is about 2%. By comparison, the results show that the deforming force under backward extrusion of hollow billet can be markedly reduced, and it relates to the diameter of inner hole. They are confirmed by forming aluminum alloy wheels using the above two different forming processes.

基金项目：

山西省自然科学基金资助项目（2013011022-5）

任杰（1990-），男，硕士研究生

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