5MN扁挤压筒优化设计

摘要

Using the flat container to extrude thin wall sheet of width is an effective method,but the stress condition is very complex,and the fracture easily takes place on the risk section.In order to improve the flat container lifeservice,Workbench is used to simulate the maximum e-quivalent stress and strain under different relative interference magnitude and different outer wall thickness.The results show that the best relative interference magnitude is 2.50‰ ~2.75‰ of 5 MN flat container;under the same conditions,the working stress decreases by 7.05% when inner diameter of outer wall is 232 mm.So,the method is feasible which reduces the flat container maximum equivalent stress by changing outer wall thickness.%采用扁挤压筒挤压宽幅薄壁型材是一种非常有效的方法,但由于扁挤压筒挤压工作环境恶劣,应力状态十分复杂,很容易在应力集中处产生破裂而失效.为了提高扁挤压筒使用寿命,运用Workbench有限元分析软件对其在不同相对过盈量和不同外套壁厚下的最大等效应力和应变进行有限元分析计算.结果表明,5 MN扁挤压筒过盈量的最佳取值范围为2.50‰~2.75‰,当外套内径取值为232 mm时,扁挤压筒工作应力值比相同条件下的原始结构应力值下降7.05%.由此得出,通过改变外套壁厚来降低扁挤压筒最大等效应力的方法是可行的.