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建立了不锈钢拉伸弯曲矫直过程的有限元仿真模型,该模型针对不锈钢拉矫机辊组配置和旋转压下的特点,采用了窄条三维壳单元对带钢进行特征建模。为提高计算效率,带钢网格进行了局部细化。对304不锈钢典型规格带钢拉矫过程进行模拟,伸长率计算值与实测值吻合较好。对带钢拉矫过程特征位置点经过各辊组的应力应变分析表明:带钢伸长率主要由1号弯曲辊组提供,而2号、3号矫直辊组对带钢伸长率的贡献不明显。该研究得到的不锈钢带拉矫过程变形行为可为拉矫工艺参数确定和优化提供理论基础。
The finite element simulation model of stainless steel straightening and bending process was set up. The strip steel was modeled by narrow three-dimensional shell element in view of the configuration of stainless steel straightening roller and the rotary pressing. In order to improve the computational efficiency, the strip grid has been partially refined. The typical straightening process of 304 stainless steel is simulated. The calculated value of elongation accords well with the measured value. The stress and strain analysis of each roller group at the characteristic point of straightening process shows that the elongation of strip is mainly provided by No.1 bending roller group and that of No. 2 and No.3 straightening roller pairs Contribution is not obvious. The deformation behavior of stainless steel strip during straightening process can provide theoretical basis for the determination and optimization of straightening process parameters.