铝合金蛇形轧制轧板曲率解析模型研究  

Analytical Study of Plate Curvature in Snake Rolling of Aluminum Alloy

作　　者：付垚[1] 谢水生[1] 熊柏青[1] 黄国杰[1] 程磊[1] 肖翔鹏[1] 

机构地区：[1]北京有色金属研究总院有色金属制备与加工国家重点实验室,北京100088

出　　处：《稀有金属》2011年第6期805-811,共7页Chinese Journal of Rare Metals

基　　金：国家973项目(2010CB735811)资助

摘　　要：根据蛇形轧制的受力特点将变形区划分为5个不同的区域,分别计算了各个区域的压力分布及角位移,在此基础上运用平面应变主应力法建立了7150铝合金蛇形轧制轧板曲率的解析模型。通过蛇形轧制实验对解析模型的精确性进行了验证。使用该解析模型对蛇形轧制过程中由线性应变差引起的轧板曲率、剪切应变差引起的轧板曲率以及总的轧板曲率进行了研究。结果表明,随着错位距离的增加由剪切应变差引起的轧板曲率增加而由线性应变差引起的轧板曲率减小,它们的共同作用导致总的轧板曲率先减小后增加。随着异速比的增加,由剪切应变差引起的轧板曲率增加,由线性应变差引起的轧板曲率保持不变,它们的共同效果使总的轧板曲率增加。增大轧板初始厚度或减小压下量都会减小轧板曲率。In order to investigate the variation of plate curvature during snake rolling,the deformation region was divided into five zones based on the stress characteristic.The pressure distribution and angular rotation in these five zones was calculated respectively.After that an analytical model to predict plate curvature during snake rolling of 7150 aluminum alloy was constructed based on plane strain slab method.The accuracy of the analytical model was verified by the comparison between the analytical results and experimental results.By using this analytical model,the variation of the plate curvature due to the difference in axial strain,shear strain and the total plate curvature during snake rolling was investigated.The results showed that,with the increasing of offset distance,the plate curvature due to difference in shear strain increased,but decreased due to axial strain,their integrated effect made the total plate curvature decrease at first and then increase.With increasing of speed ratio,the plate curvature due to the difference in shear strain increased,however the plate curvature due to the difference in axial strain did not change,as a result the total plate curvature increased.A smaller initial plate thickness and a larger reduction might produce a larger plate curvature.

关 键 词：蛇形轧制 轧板曲率 解析模型 错位距离 

分 类 号：TG146.2[一般工业技术—材料科学与工程]