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中文摘要：
拉伸矫直是提高型材平直度的重要手段。以一维弯曲的圆形截面棒材为研究对象,基于拉伸矫直的对称性,建立了纵剖面1/2的三维几何模型,运用MARC有限元软件对拉伸矫直变形过程进行大量工况的数值仿真计算,并就矫直温度、位移、原始弯曲度、棒材原始直径对残余弯曲度的影响进行了研究,然后用逐步回归法对仿真计算数据进行拟合,获得棒材残余弯曲度与矫直工艺参数及棒材几何尺寸的关系数学模型。研究表明,AZ31棒材较为适宜的矫直温度为160～200℃,尽管棒材残余弯曲度模型预测结果与实验结果存在一定误差,但该预测模型揭示的矫直工艺参数对矫直的影响规律与实验结果较为一致。
英文摘要：
It is an important means to improve the flatness of profile for tension straightening.The circular bar of one-dimensional bending was selected for study.The three dimensions（3D） model for 1/2 longitudinal section geometry was developed based on the symmetry characteristic of tension straightening.The deformation of AZ31 bars during tension straightening was simulated by MARC software based on large numbers of operation date.A series of researches on the residual curvature under different parameters（the temperature of tension leveling,the displacement of clamp,diameter of bars,originality curvature） were done.The mathematic model to predict residual curvature under different conditions of tension straightening was established by means of stepwise regression.The results show that the best temperature of tension straightening for AZ31 bars is 160℃~200℃ and the effect of process parameter on relation between the residual curvature is good agree with the experimental results although there is some discrepancy at the residual curvature.
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