高强钢辊弯成形过程中成形力的影响因素研究  

Research on Influencing Factors of Forming Force in High Strength Steel for Roll Forming Process

作　　者：丁立波[1] 李健东 李明杰[1] 梁继才[2] DING Li-bo;LI Jian-dong;LI Ming-jie;LIANG Ji-cai(Baicheng Vocational and Technical College,Baicheng 137000,China;College of Materials Science and Engineering,Jilin University,Changchun 130000,China)

机构地区：[1]白城职业技术学院,吉林白城137000 [2]吉林大学材料科学与工程学院,长春130000

出　　处：《精密成形工程》2021年第4期133-138,共6页Journal of Netshape Forming Engineering

摘　　要：目的探究辊弯成形过程中各工艺参数(板材厚度、弯曲角度以及总弯曲角度)对成形力的影响。方法研究“日”字形截面的辊弯过程,利用ABAQUS有限元软件(FEA),建模分析辊弯成形过程中成形力大小的影响机制,避免实际生产中采集数据的复杂性以及困难性。为了避免各因素之间相互影响,采用单一变量实验法进行实验,根据不同板厚(1.5,2.0,2.5 mm)和弯曲角度(5°,10°,15°,30°)分别建立辊弯成形有限元模型,使板材从0°弯曲到90°,形成“日”字形截面,模拟计算后采集轧辊的成形力。结果通过模拟结果与实际测量值对比可知,板材厚度为1 mm,弯曲角度为5°时,成形力误差为22.33%;当板料厚度为2.5 mm,弯曲角度为30°时,成形力误差为8.55%。模拟结果与实际测量值吻合良好,误差可控制在22%以内。结论随板材厚度的增加,成形零件的强度增加,所需的成形力也大幅增加,呈现非线性关系。随弯曲角度的增加,成形力明显增大,呈现非线性关系。该结论为“日”字形截面型材成形力的选择提供了理论依据。Roll forming is a new technique of sheet metal processing,and for commercial vehicles anti-collision beam pro-duction and processing provides a new method,but the choice of forming force is difficult to control in the process of forming,the roll forming process parameters in the process of the choice of influence on the forming force generally reflect the degree of influence on the thickness of the sheet metal,bending angle and total bending angle.This paper studies the“日”shape section of roll forming process,using finite element analysis(FEA)software to analyze the forming force during the process of forming mechanism,to avoid the complexity and difficulty of the acquisition data in the process of production.In order to avoid the mutual influence between various factors,a single variable experiment method to test is used.We set up the model respectively according to the different thickness(1.5,2.0,2.5 mm)and bending angles(5°,10°,15°,30°).The sheet is bent from 0°to 90°to form“日”shape section.The forming force of the roll is collected after simulation calculation.The comparison between the simulation results and the actual measured values shows that when the sheet thickness is 1 mm and the bending angle is 5°,the forming force error is 22.33%;when the sheet thickness is 2.5 mm and the bending angle is 30°,the forming force error is 8.55%.The simulation results are in good agreement with the actual measured values,and the error can be controlled within 22%.The research results show that as the thickness of the sheet increases,the strength of the molded parts increases,and the forming force also increases significantly,presenting a nonlinear relationship;with the increase of the bending angle,the form-ing force increases significantly,presenting a nonlinear relationship.The conclusion provides a theoretical basis for the selection of forming force of“日”shape section.

关 键 词：辊弯成形 工艺参数 成形力 有限元模拟 

分 类 号：TG306[金属学及工艺—金属压力加工]