方矩形管连续辊弯成型延伸规律  

Elongation of rectangular tube in continuous roll forming

作　　者：付志强[1,2] 安子军[1] 杜凤山[1,2] 段利英[1] 于辉[1] 杨帆[1,2] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《吉林大学学报（工学版）》2015年第2期487-493,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51075352;51275445)

摘　　要：为了减小方矩形管辊弯成型时纵向延伸,结合某厂实际生产工艺,建立了方矩形管辊弯成型七机架的三维弹塑性非线性有限元模型。通过仿真分析得到了方矩形管辊弯成型时横向金属流动规律及纵向延伸率的分布规律,与现场测量结果一致。分析了轧辊转速、管坯壁厚、辊径位置等因素对延伸率的影响,在此基础上优化了辊弯轧制工艺参数。结果表明:优化后的辊弯轧制工艺提高了方矩形管的成型质量,为预测最终成型尺寸精度和辊弯成形工艺参数的制定提供了理论依据。In order to reduce the longitudinal extension of rectangular tube in the roll forming process,a three-dimensional elastic-plastic nonlinear Finite Element Model（FEM）of the roll forming is established with the actual factory production process.The metal flow law in the roll forming of rectangular tube and the distribution of the longitudinal elongation rate are obtained by analyzing the simulation results.The obtained results are consistent with the field measurements.The effects of the roller speed,the thickness of the tube wall and the location of the roll diameter on the elongation are analyzed using the proposed FEM.Then these processing parameters are optimized,which improve the continuous rolling performance of rectangular tubes.This research may help to predict the final dimensional accuracy and determine the processing parameters of the roll forming.

关 键 词：连续轧制 方矩形管 辊弯成型 延伸率 有限元 

分 类 号：TG335[金属学及工艺—金属压力加工]