论文部分内容阅读
分析了偏心旋压与传统轴对称普通旋压的区别,利用ANSYS软件对偏心类管件的缩径旋压进行了三维有限元数值模拟,并解决了模拟中的动态边界及摩擦问题.通过模拟得到了变形瞬间接触区工件的应力场分布,工件的网格变化,变形终步毛坯的应力场、应变场分布以及轴向伸长量,并分析了偏心旋压中的一些常见现象及缺陷.模拟结果表明:偏心旋压不同于传统轴对称普通旋压,其成形参数的变化明显呈非轴对称分布;成形机理受旋压方式、偏心距、进给比、旋轮圆角半径、道次下压量以及毛坯壁厚等影响.试验结果表明,工艺参数对轴对称普通旋压的旋压力及成形质量有很大影响.文中最后基于试验结果就不同工艺参数对偏心旋压下旋压力及成形质量的影响进行了讨论.
The difference between eccentric spinning and traditional common axisymmetric spinning was analyzed and the finite element numerical simulation of the shrinking spinning of eccentric tube was carried out by ANSYS software and the dynamic boundary and friction problems in the simulation were solved. The distribution of stress field, the grid of the workpiece, the stress field, the strain field distribution and the axial elongation of the workpiece at the moment of deformation contact were analyzed, and some common phenomena and defects in the eccentric spinning were analyzed. The results show that the eccentric spinning is different from the conventional common axisymmetric spinning, the change of the forming parameters is obviously non-axisymmetric distribution. The forming mechanism is affected by the spinning method, the eccentricity, the feed ratio, the rounding radius, Pressure and the thickness of the blank.The results show that the process parameters have a great influence on the spin pressure and the forming quality of the common axisymmetric spinning.In the last part of the paper, based on the experimental results, the influence of different process parameters on the spin pressure and forming The impact of quality is discussed.