不锈钢车顶弯梁拉弯成形研究  

Research on Stretch Bending Forming of Stainless Steel Curved Beam

作　　者：朱丽娟[1] 王敏[1] 谷诤巍[1] 何玲玲 ZHU Lijuan;WANG Min;GU Zhengwei;HE Lingling(College of Materials Science and Engineering,Jilin University,Changchun 130022)

机构地区：[1]吉林大学材料科学与工程学院,长春130022

出　　处：《材料导报》2017年第24期179-181,186,共4页Materials Reports

基　　金：国家自然科学基金青年科学基金(51301074);吉林省科技发展计划项目(2013010201JC)

摘　　要：利用ABAQUS软件,对某轨道车辆的不锈钢车顶弯梁的拉弯成形过程进行了模拟研究,分析了L形型材拉弯后截面畸变及回弹的影响因素及控制方法。结果表明:模具立边深度对截面畸变的影响较大,拉伸量对其影响相对较小;包覆拉伸量对回弹时发生的截面扭曲的影响最大,补拉量对回弹时发生的侧面弯曲的影响最大;采用模具型面补偿法可以有效减小回弹,提高轮廓精度。实验证明,当预拉量和补拉量为1%、包覆拉伸量为7.5%和模具立边深度为H-0.5mm并且模具型面补偿量为最大回弹量的1.1倍时,可以制造出高质量的不锈钢型材拉弯件。The stretch bend forming process of roof curve beam with stainless steel of rail vehicle was simulated by ABAQUS.The influence factors and control methods of the section distortion and the springback of L-section profile after bending were studied.Results showed that the vertical depth of the mold had great influence on the section distortion,while,the effect of stretching on the section distortion was relatively small.The wrap-elongation had the largest impact on the section distortion caused by the springback,the post-elongation had the largest impact on the side bending caused by springback.The mold surface compensation method could effectively reduce the springback,improve the accuracy of the contour.The experimental results showed that when the amount of pre-elongation and the amount of post-elongation were both 1%,the amount of wrap-elongation was 7.5%,the depth of the die was H-0.5 mm and the die surface amount was 1.1 times of the initial maximum springback amount,high quality stainless steel profile stretch bending parts could be produced.

关 键 词：拉弯成形 弯梁 数值模拟 回弹 

分 类 号：TG386[金属学及工艺—金属压力加工]