锻压技术

双管带隔筋件隔筋形状对内外管成形的影响

英文标题：Influence of barrier-rib shape for double-tube with barrier ribs parts on forming of inner and outer tubes

作者：马晓虎张宝红李国俊张治民梁柱

单位：中北大学

分类号：

出版年,卷(期):页码：2016,41(1):6-10

摘要：

为了获得综合性能良好的某铝合金双管带隔筋挤压件，对提出的整体挤压成形工艺方案进行有限元模拟，模拟结果中存在折叠、挤压力大、局部强度不足等缺陷。针对所产生缺陷进行成形工艺方案改进，并确定优化后的挤压方案为：双筒带隔筋挤压件连皮在中间，隔筋的上端面倒有呈水滴状的圆弧。通过模拟对改进后的工艺进行验证分析，结果表明:过渡圆角的大小对折叠有较大影响，增大圆角可减小材料向筋部流动的阻力，可以改善材料的流动状态，并获得了最优过渡圆角半径。利用设计的模具进行了实验验证，获得了成形质量良好的挤压件。

In order to get on good comprehensive properties for a double-tube with barrier ribs of aluminum extrusion, a whole extrusion forming process was simulated firstly, in which defects such as folding, squeezing pressure and insufficiency local strength were found. Based on the above defects, the forming process was improved, and the optimized extrusion solution was ultimately determined as the binocular-shaped part with extrusion skin barrier ribs in the middle and at the end face of the barrier ribs with a teardrop-shaped circular arc. Further, the modified process was analyzed by simulation. The results show that the fillet affects the fold greatly by increasing the fillet to reduce the flow resistance towards rib and improve the flow state of the material, and then the optimal transition radius is obtained. Finally, the experimental verification was carried out by the modified die, and the good quality extrusion part was obtained.

基金项目：

山西省自然科学基金资助项目（2013011022-5）

马晓虎（1989-），男，硕士研究生

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