气瓶多道次热旋压收口成形工艺的数值模拟研究

详细信息

Numerical Simulation Research on the Process of Multi-path Hot Neck-spinning Formation for the Cylinder

摘要: 本文基于MSC.Marc有限元软件,对首道次从夹具端起旋,随后道次起旋点沿管轴向逐渐远离夹具端的旋压收口工艺路线进行了数值模拟研究。数值分析表明,所建立的旋压模型符合旋压收口工艺的金属塑性变形规律。旋压温度在1,200℃,管口出现局部变形失稳。壁厚在管端部增厚,在过渡圆角处减薄,且随着旋压温度的升高,管端的增厚和圆角的减薄都增大。最大等效应力应变分布在靠近收口管端的圆周外表面处,且随着旋压温度的增加都相应减小。
- 热旋压 /
- 收口成形 /
- 数值模拟
Abstract: A neck-spinning route with initial-spinning point situated close to cramping fixture for first pass and leaving cramping fixturen gradually along the axis of tube for subsequent pass is investigated by means of numerical simulation based on MSC.Marc soft.The result shows that the model established is in accord with metal plastic deformation law for necking-spinning process.Local buckling occurs at the mouth of pipe at temperature of 1200℃.The wall is thick at mouth of pipe and thins at the knuckle,and is thicker and thinner with a rise in spinning temperature.The maximum equivalent stress and strain are located in outer-surface closed to the pipe mouth,and they are all reduced with the rise in spinning temperature.
- Hot spinning /
- Neck-spinning formation /
- Numerical simulation