摘要
为提高型材变曲率滚弯成形精度,减少滚弯模型计算结果与型材滚弯尺寸之间的误差,以弹塑性变形理论为基础,分别建立了驱动辊与支撑辊之间的型材弹性弯曲模型、驱动辊与夹持辊之间的型材弹塑性弯曲模型以及驱动辊与弯曲辊之间的型材渐进卸载回弹模型,对当前滚弯模型进行了修正。在此基础上进行了多曲率T型材和L型材的滚弯试验,分别将修正后的滚弯模型的计算结果及基于几何模型的计算结果与试验数据进行了对比。结果表明,修正后的滚弯模型对T型材和L型材计算结果的平均准确度较基于几何模型的计算结果分别提高了18%和36%。
To improve the forming accuracy of profile in roll bending with variable curvatures and reduce the error between the calculation result of the roll-bending model and the roll-bending size of the profile,based on the elastic-plastic deformation theory,the elastic bending model of profiles between driving-roller and back-up roller,the elastic-plastic bending model of profiles between driving-roller and pinch roller,and the progressive unloading rebound model of profiles between driving-roller and bending roller were established,respectively.The roll-bending model was corrected.Based on this,the roll-bending tests of the multi-curvature T-profile and L-profile were carried out,and the calculation results of the modified roll-bending model and the calculation results based on the geometric model were compared with the tests data,respectively.The results show that the average accuracy of calculation results for T-profile and L-profile of the modified roll-bending model increases by 18%and 36%than that of the calculation results based on the geometric model,respectirely.
作者
刘涛
高金龙
黄世军
南文明
张津瑞
LIU Tao;GAO Jin-long;HUANG Shi-jun;NAN Wen-ming;ZHANG Jin-rui(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;Defence Equipment Research Institute,China First Heavy Industries,Dalian 116113,China;Hebei Innovation Center for Equipment Lightweight Design and Manufacturing,Yanshan University,Qinhuangdao 066004,China;China Oilfield Services Limited,Langfang 065000,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2022年第11期95-101,共7页
Journal of Plasticity Engineering
基金
国家高档数控机床专项(2018ZX007002-004)
河北省钢铁联合基金资助项目(E2022203215)。
关键词
滚弯模型
弯矩曲率
四辊滚弯
铝合金型材
roll-bending model
moment-curvature
four-roller roll-bending
aluminum alloy profile
