基于ANSYS/LS-DYNA辊式楔横轧轧制过程有限元分析  

The Finite Element Analysis of The Process of Roller Cross-wedge Rolling during Wedge in Base using ANSYS/LS-DYNA

作　　者：陈俊龙[1] 王金龙[2] 

机构地区：[1]山东科技大学,山东青岛2665902 [2]潍坊学院,山东潍坊261061

出　　处：《潍坊学院学报》2017年第2期6-11,共6页Journal of Weifang University

摘　　要：建立了辊式楔横轧轧辊及轧件的有限元模型,对轧制过程进行了动态模拟,获得了轧件在不考虑热力耦合时的应力分布、考虑热力耦合时的温度场分布及应力分布,并且将两种状态进行了比较。结果表明,轧件的最大应力或温度区域位于与轧辊接触部位,径向沿金属流动方向向两侧区域和轴心扩展,轴向沿轴线中心向两测扩展;轧制过程中,机械做功使轧件的温度持续升高,轧辊转速19rpm、轧件初始温度为450℃时,轧制结束时温度升高49.742℃,前期由于轧件温度升高有助于塑性变形,考虑热力耦合时轧件的最大等效应力小于未考虑时的,而后期由于轧件变形减小,导致规律正好相反。结论为研究楔横轧轧件成形规律和控制利用轧件在轧制过程中机械做功造成的温升提供依据。A finite element model of roller cross--wedge rolling roller and rolled piece is established to dynamically simulate the rolling process. The stress distribution of rolled piece not considering thermal mechanical coupling, the temperature and stress distributions of roiled piece considering it were obtained and the either case compared. The results show that the region of the highest temperatures and stresses were at the contact place between the roller and rolled piece, it extended from radial to the sides and axis of metal flow direction and axial direction to the sides of the center point of axle line; Mechanical work continuously increased the rolled piece temperature in the rolling process, the temperature have increased by 49. 742 degrees centigrade with roll rotation speed 19rpm and the roiled piece initial temperature 450 degrees centigrade at the end, since tem- perature inerement can help the plastic deformation of roiled piece in the early stage of the rolling, the highest stress of rolled piece not considering thermal mechanical coupling is less than the stress considering it and an inverse relationship occurs due to the decreasing deformation of rolled piece in the later stage of the rolling. The results can provide the foundation for researching the forming laws of rolled piece in cross wedge rolling and controlling and utilizing the temperature rise of rolled piece caused by mechanical work in the rolling process.

关 键 词：楔横轧 轧辊 轧件 有限元模型 热力耦合 

分 类 号：TG339[金属学及工艺—金属压力加工]