论文部分内容阅读
基于Hyper Xtrude瞬态分析,对方管铝型材进行四因素四水平正交试验获取的120℃的最优梯温进行模拟。结果表明,挤压塑性升温与坯料减小形成的温差刚好达到平衡状态,基本保证模具出口处于5℃温差的等温挤压状态,型材出口速度分布流速均方差由非等温状态的3.263 mm·s-1减少到0.362 mm·s-1,型材变形量也从1.690 mm减少为0.054 mm,坯料变形区轴向各层面温度分布呈阶梯状,越接近模口变形区温度、流速、变形程度越均匀。
Based on the Hyper Xtrude transient analysis, the optimum temperature of 120 ℃ for the aluminum profile of the square tube was simulated by four-factor and four-level orthogonal experiment. The results show that the temperature difference between extrusion plastic temperature increase and blank reduction just reach the equilibrium state, and basically ensure that the die outlet is in the isothermal extrusion temperature of 5 ℃. The mean square velocity of the profile exit velocity distribution is from 3.263 mm · s- 1 to 0.362 mm · s-1, the deformation of the profile decreased from 1.690 mm to 0.054 mm. The temperature distribution in the axial direction of the deformation zone of the billet was step-shaped. The closer to the deformation zone of the die, the more uniform the velocity and deformation.