支架类槽钢冷弯成形参数设计及优化  

Design and optimization on cold bending parameters for sporting channel steel

作　　者：顾泽中 孟珂 任锟[1] 周家银 陈英豪 Gu Zezhong;Meng Ke;Ren Kun;Zhou Jiayin;Chen Yinghao(School of Mechanical Engineering and Automation,Zhejiang Sci-Tech University,Hangzhou 310000,China;Zhejiang Weilian Technology Co.,Ltd.,Shaoxing 312000,China)

机构地区：[1]浙江理工大学机械与自动控制学院,浙江杭州310000 [2]浙江伟联科技股份有限公司,浙江绍兴312000

出　　处：《锻压技术》2022年第10期90-95,共6页Forging & Stamping Technology

基　　金：浙江省重点研发项目(2020C01085);浙江省“万人计划”杰出人才项目(2018R51008)。

摘　　要：为避免支架类槽钢在冷弯成形过程中出现弯角减薄和圆角变尖的缺陷、提高节点的刚度与极限承载能力、改善构件的力学性能,针对其成形道次数与弯曲角增量的设计及优化进行研究。考虑坯料厚度、弯曲角度和弯曲半径等参数,计算实际用料宽度、确定成形顺序;根据成形道次数经验公式,计算总道次数;利用弯曲角分配公式,计算每道次间的弯曲角增量,并利用Hauschild模型进行有限元仿真分析;利用仿真结果调整各道次的弯曲角增量,确定最优道次数和弯曲角增量。最后,结合生产设备验证优化结果的有效性。结果表明:基于COPRA软件仿真结果分析出冷弯过程中超过极限值的不合理应变,通过改变成形道次数和弯曲角增量来降低冷弯过程中的最大应变值,可有效减少弯角减薄和圆角变尖的缺陷。In order to avoid the defects of bending angle thinning and fillet sharpening in cold bending process of sporting channel steel,improve the joint stiffness,ultimate bearing capacity and mechanical properties of components,the design and optimization of the number of forming passes and the bending angle increment were researched.Then,considering the parameters such as blank thickness,bending angle and bending radius,the actual material width was calculated,and the forming sequence was determined.Furthermore,the total number of passes was calculated according to the empirical formula for the number of forming passes,and the bending angle increment between each pass was calculated by the bending angle distribution formula.In addition,the finite element simulation analysis was conducted by Hauschild model,the bending angle increment between each pass was adjusted by the simulate results to determine the optimal pass number and the bending angle increment.Finally,the validity of the optimization results was verified in combination with the production equipment.The results show that the unreasonable strain exceeding the limit value during the cold bending process is analyzed based on the simulation results of software COPRA,and the maximum strain value in the cold bending process is reduced by changing the number of forming passes and the bending angle increment,which can effectively reduce the defects of bending angle thinning and fillet sharpening.

关 键 词：支架类槽钢 冷弯成形 弯曲角 成形道次数 Hauschild模型 

分 类 号：TG316.14[金属学及工艺—金属压力加工]