两层扁挤压筒结构设计

Structure design of two-layer flat container

扁挤压筒是挤压大型扁宽薄壁型材的一种非常有效的工具.由于扁挤压筒的挤压环境恶劣,应力分布集中,容易开裂.为了提高扁筒的工作可靠性,运用ANSYS有限元分析软件对扁挤压筒进行应力应变分析和结构设计.结果表明,当双层扁挤压筒装配过盈量在2.75‰~3‰内取值,内孔应力值分布最佳;内孔椭圆度e=1.10~1.20时,不仅可以降低应力集中,而且内孔应力分布更均匀.扁挤压筒的结构设计改善了扁挤压筒应力集中状况,能为实际工程问题中研究扁挤压筒的应力应变提供技术依据.

Flat container is the most effective tool for extruding large flat sheet.Under the severe working conditions,it is very uneven and easy to crack.In order to improve its working reliability,the stress-strain analysis and structural optimum design are investigated by the ANSYS software of finite element.The results show that for the two-layer flat container,under the same conditions,the best stress distribution is obtained with assembly interference from 2.75 ‰ to 3 ‰,as the inner hole ovality e=1.10～1.20,the stress concentration and inner hole stress distribution is decreased.By the structure design of the flat container,the stressconcentration is reduced.The structure design of the container can provide technical basis in solving practical engineering problems.