基于设计的轧辊孔型,使用三维有限元分析软件Simufact,对28Ni Cr Mo V8.5钢管典型规格准16 mm×1.5mm皮尔格冷轧过程进行了数值模拟。研究了不同摩擦系数及孔型开口系数对冷轧管横向壁厚分布及精度的影响规律。结果表明:钢管的横向...基于设计的轧辊孔型,使用三维有限元分析软件Simufact,对28Ni Cr Mo V8.5钢管典型规格准16 mm×1.5mm皮尔格冷轧过程进行了数值模拟。研究了不同摩擦系数及孔型开口系数对冷轧管横向壁厚分布及精度的影响规律。结果表明:钢管的横向壁厚分布是不均匀的,在孔型开口及孔顶处出现最小值,在孔型侧壁角45°两侧出现最大值。随着摩擦系数和孔型开口系数增大,不均匀的横向壁厚变得更加严重。当轧辊与轧件的摩擦系数由0.080增大到0.095时,冷轧管的横向壁厚精度由5.51%变到6.98%;当孔型开口系数由0.051增大到0.061时,横向壁厚精度由5.51%变到8.11%。展开更多
The calculation precision and convergence speed of streamline strip element method are increased by (using) the method whose initial value of the exit lateral displacement is determined with strip element variation me...The calculation precision and convergence speed of streamline strip element method are increased by (using) the method whose initial value of the exit lateral displacement is determined with strip element variation method, and the accurate tension lateral distribution model is adopted based on the original third power spline function streamline strip element method. The basic theory of the strip element method is developed. The calculated results by the improved streamline strip element method and the original streamline strip element method are compared with the measured results, showing that the calculated results of the improved method are in good agreement with the measured results.展开更多
文摘基于设计的轧辊孔型,使用三维有限元分析软件Simufact,对28Ni Cr Mo V8.5钢管典型规格准16 mm×1.5mm皮尔格冷轧过程进行了数值模拟。研究了不同摩擦系数及孔型开口系数对冷轧管横向壁厚分布及精度的影响规律。结果表明:钢管的横向壁厚分布是不均匀的,在孔型开口及孔顶处出现最小值,在孔型侧壁角45°两侧出现最大值。随着摩擦系数和孔型开口系数增大,不均匀的横向壁厚变得更加严重。当轧辊与轧件的摩擦系数由0.080增大到0.095时,冷轧管的横向壁厚精度由5.51%变到6.98%;当孔型开口系数由0.051增大到0.061时,横向壁厚精度由5.51%变到8.11%。
文摘The calculation precision and convergence speed of streamline strip element method are increased by (using) the method whose initial value of the exit lateral displacement is determined with strip element variation method, and the accurate tension lateral distribution model is adopted based on the original third power spline function streamline strip element method. The basic theory of the strip element method is developed. The calculated results by the improved streamline strip element method and the original streamline strip element method are compared with the measured results, showing that the calculated results of the improved method are in good agreement with the measured results.
