中厚板热矫直过程中加工硬化模量和反弯曲率的确定

Work hardening modulus and reverse bend curvature in plate hot roller leveling

加工硬化模量和反弯曲率是中厚板在矫直过程中两个关键且难以确定的参数。文章通过有限元软件AN-SYS/LS-DYNA对矫直过程进行模拟,利用模拟结果中板材在某时刻的垂直位移得到板材的弯曲曲线,根据该曲线的光滑程度以及曲线顶点的位置与矫直辊压弯量的吻合程度,确定出符合实际的加工硬化模量,并利用各点垂直位移的拟合曲线确定出板材在矫直过程中的反弯曲率。该方法解决了实际矫直过程中难以用仪器测量得到该参数的问题。

Working hardening modulus and reverse bend curvature in plate hot roller leveling are different obtained. The paper uses explicit dynamic FEM code ANSYS/LS-DYNA to simulate plate deformation in hot leveling process, and makes use of vertical displacement of simulation to get curvature at one moment, and considers whether the curvatures is smooth and tops of the curvature tallies with intermesh of roller, to determine work hardening modulus, and to acquire reverse bend curvature from fit curve of vertical displacement. It solved the parameter which can＇t be measured with instrument in leveling process.