四辊卷板机最小弯卷半径控制模型的研究  

Research on the control model of minimum radius for rolling on bending-plate machine with four-roll

作　　者：陈德道[1] 杨晋[1] 安虎平[2] 

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070 [2]兰州城市学院培黎工程技术学院,甘肃兰州730070

出　　处：《锻压技术》2016年第1期77-82,共6页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51265022)

摘　　要：研究了四辊卷板机在弯卷工艺过程中材料的回弹问题。通过分析板件弯卷变形时受力状态与回弹曲率半径及弯卷半径之间的关系,建立了弯卷变形几何模型和计算模型,确立了弯卷力及弯矩的计算方法,并分析了影响最小弯卷半径的各因素。在对四辊卷板机上的预弯卷和弯卷过程进行受力分析的基础上,给出了弯曲功和驱动扭矩的计算方法。在电机功率、摩擦进给、接触应力和外层拉力等4个约束条件下分别提出了最小弯卷半径的计算方法。最后,用所建计算模型结合实际工艺参数计算最小弯卷半径并与实验值比较,计算结果与实际值比较吻合,验证了模型的有效性。The springback of the material in the bending-rolling process was studied by four-roU bending-plate machine. Based on the relationship between stress state of bending plate with curvature radius of springback and bend radius, the models of geometric and calcula- tion were set up. Then, calculation methods of bending force and bending moment were established, and four factors influencing on the minimum roll radius were analyzed. On the basis of force analysis for pre-bending and bending-rolling process on four-roller bend-plate machine, bending work and driving torque were given. The minimum curvature radius methods were put forward respectively under the four constraint conditions of the motor power, the friction feed, the contact stress and the outer sphere tension. Finally, the minimum curvature radius were calculated and compared with the experimental values by the calculation model combining with the practical technological parameters. The result shows that it is identical with the actual value, and the effectiveness of the models is verified.

关 键 词：四辊卷板机 回弹半径 受力状况 最小弯卷半径 

分 类 号：TG333.24[金属学及工艺—金属压力加工]