热连轧圆钢成品孔型的有限元分析

FEM analysis of the finished groove in hot-rolled round steel

根据ф16 mm圆钢的轧制规程,运用有限元分析软件ANSYS中的LS-DYNA大变形弹塑性显式分析动力学模块,对终轧机架在分别采用双半径圆弧和切线扩张角两种成品孔型条件下的热连轧过程进行有限元模拟。对比分析了同一轧件在不同孔型中的金属流动特性和应力应变分布规律。结果表明,有限元模拟结果与实际生产过程相吻合;对同样采用30°扩张角的两种孔型而言,轧件在双半径圆弧成品孔型中的表面受力和总体应变分布更为均匀;轧件在成品孔型的圆弧扩张部位受到的应力较大,使轧辊轧槽表面磨损不均;采用材质硬度更高的成品轧辊,可以降低轧槽表面的磨损程度,延长轧辊孔型的使用寿命,节约生产成本。

Based on the rolling rule of-16 mm round steel in the Bar Milling Plant of Wuhan Iron and Steel Co.,Ltd.and making use of LS-DYNA in ANSYS,the hot continuous rolling of the round steel under the respective conditions of dual-radius arc and tangent angle in the finished groove was simulated by FEM.The flowing characteristics of metal and stress and strain distribution of the same rolling piece through different finished grooves were compared and analyzed.The results show that,FEM simulation agrees well with the actual rolling process.For the two grooves that both use the divergence angle of 30°,the surface pressure and total strain of the rolling piece in the dual-radius arc groove are distributed more evenly.The comparatively larger stress on the arc extension part of the rolling piece produces uneven wear on the surface of the roller groove,and the use of harder roller can reduce groove wear,prolonging the service life of the roller and saving production cost.