锻压技术

AZ91D镁合金散热器型材挤压模具结构优化

英文标题：Optimization of extrusion mold structure for AZ91D magnesium alloy radiator profiles

作者：黄东男吴南董瑞峰孙磊申浩辰

分类号：TG316

出版年,卷(期):页码：2019,44(10):131-138

摘要：

针对复杂断面型材的挤压所需的挤压力较大且模具工作带处易损坏的问题，在工作带之前增设一导流板。设计3种不同导流角25°、20°、15°的模具，利用Deform-3D有限元模拟软件对3种模具进行挤压过程的数值模拟，比较不同导流角下挤出型材截面的温度场、流速场分布。结果表明：导流角为20°与15°时，挤出型材截面温度与流速分布不均匀；当导流角为25°时，挤出型材截面温度与流速分布比较均匀。对导流角25°与15°这2种模具分别进行了挤压试模，结果表明，导流角为25°的模具挤出了质量合格的散热器型材，导流角为15°的模具挤出型材的表面质量较差。

Large extrusion pressure is required for the extrusion of profile with complex section，and the working belt of mold is easy to be damaged. For the above problems, a diversion plate was added before the working belt, and three kinds of mold with different diversion angles of 25°, 20°, 15° were designed respectively. Then, their extrusion processes were numerically simulated by finite element simulation software Deform-3D respectively, and the distributions of temperature field and velocity field for extrusion profile section under different diversion angles were compared. The results show that the distribution of temperature and velocity for extrusion profile section is uneven under diversion angle of 20° and 15°, and the distribution of temperature and velocity for extrusion profile section is uniform under diversion angle of 25°. Furthermore, the extrusion processes for two kinds of mold with diversion angle of 25° and 15° were tested respectively. The results show that the qualified radiator profile is extruded by mold with diversion angle of 25°, and the surface quality of extrusion profile is poor by mold with diversion angle of 15°.

基金项目：

国家自然科学基金资助项目（51364027）

作者简介：黄东男（1979-），男，博士，教授 E-mail：dongnan_2000@163.com

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