铝合金T型材变曲率滚弯工艺研究  

Study on roll bending process of T-section of aluminum alloy with variable curvature

作　　者：黄世军[1] 钱若琛 陈松 范海峰[2] 张高亮[2] HUANG Shi-jun;QIAN Ruo-chen;CHEN Song;FAN Hai-feng;ZHANG Gao-liang(Department of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;China National Heavy Machinery Research Institute Co.,Ltd.,Xi’an 710032,China)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]中国重型机械研究院股份公司,陕西西安710032

出　　处：《重型机械》2021年第2期1-6,共6页Heavy Machinery

基　　金：国家高档数控专项(2018ZX04007002);秦皇岛市科技发展计划项目(201801B048)。

摘　　要：铝合金型材弯曲件因其良好的力学性能在航空航天飞行器结构件中广泛应用,弯曲件的成形精度会影响机身加工质量和空气动力学性能。为达到铝合金T型材变曲率滚弯成形精度,本文利用四棍滚弯机对其滚弯工艺流程进行了研究,通过三次试弯达到精度要求。首先,基于型材数模型线特点对滚弯工艺参数计算方法进行完善。然后,通过型材预滚弯得到第一个弯曲件,提取其半径数据,利用回归拟合修正回弹公式,利用修正的回弹公式进行第二次滚弯得到第二个弯曲件,最后在分析第二个弯曲件尺寸的基础上,提出了局部半径补偿方法,进行第三次滚弯得到第三个弯曲件,其最大贴膜误差达到0.65 mm,满足精度要求。In order to achieve the forming accuracy of T-section aluminum alloy with variable curvature,this paper studies the rolling process of T-section aluminum alloy with four bar bending machine,and achieves the accuracy requirements through three times of trial bending.First of all,the calculation method of roll bending process is improved according to the characteristics of digital die size.Then pre roll bending is carried out,the data is used to modify the rebound formula,and the second bending part is obtained by the second roll bending using the modified rebound formula.Finally,based on the analysis of the size of the second bending part,the local radius compensation method is proposed,and the third bending part is obtained by the third roll bending,and the error reaches 0.65mm,which meets the accuracy requirements.

关 键 词：变曲率 滚弯工艺 回弹 误差补偿 

分 类 号：TG302[金属学及工艺—金属压力加工]