短芯棒拔制有限元分析

借助ANSYS软件显式动力模块建立了钢管与内外模具的三维有限元模型，动态模拟了短芯棒拔制的整个过程，研究了模锥角、摩擦系数、壁厚等工艺参数对拔制力的影响，并根据得到的应力分布规律分析了生产中拔断等实际问题的机理．与空拔相比较，在短芯棒拔制过程中，纵裂现象一般不会发生，由于钢管轴向应力在横截面上分布均匀，一般也不会出现以局部破坏形式出现的横裂现象．本文所建立的拔制力分析模型经与实验结果比较，达到了较好的吻合，可为优化模具结构和进行短芯棒拔制工艺设计提供了依据．

Analysis of Finite Element on Tube Plug Drawing Mill

3D finite element model of steel tube and internal-external die is created to simulate the whole process of tube plug drawing mill dynamically based on explicit dynamic module of ANSYS. The relationship of drawing force and processing parameter such as die angle ,coefficient of friction, wall thickness and so on is studied. According to regularities of stress distribution, the mechanisms of the problem,which often cause tensile failure etc in production,are analyzed. The phenomenon of longitudinal fission seldom occurred during the process of tube plug drawing mill compared with empty-sunken steel tube. The problem which seldom cause transverse fissure in form of partial failure owing to uniform distribution of axial stress in cross section. The analyze of drawing force model is well meeting to the experimental result. Foundation is laid for optimal design of die structure and technological design of tube plug drawing mill.