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5A06铝合金高筋蒙皮热压成形规律及尺寸精度研究
英文标题:Research on thermal forming law and dimensional accuracy for high-stiffener integral panel of 5A06 aluminum alloy
作者:秦中环 李保永 韩春岭 薛杰 张志来 武永 陈明和 
单位:北京航星机器制造有限公司 南京航空航天大学 
关键词:5A06铝合金 高筋蒙皮 热压成形 尺寸精度 成形缺陷 
分类号:TG453.9
出版年,卷(期):页码:2020,45(8):76-82
摘要:
以5A06铝合金高筋蒙皮为对象,研究了高筋蒙皮件的结构尺寸及其热压成形工艺中的变形温度、保温时间、保压压力等工艺参数对热压成形件尺寸精度的影响规律。高筋蒙皮热压成形时,随着筋高与蒙皮厚度比值的增加,蒙皮表面凹陷程度增加,端面收缩程度减小;随着保压压力和保温时间的增加,蒙皮表面凹陷程度降低,端面收缩程度增加,侧面倾斜角度降低,回弹减小;随着横向筋宽度的降低,表面凹陷程度减小,端面收缩程度增加,当横向筋宽度降低至2 mm时出现高筋起皱;变形温度对表面凹陷程度和端面收缩程度没有明显的影响。根据5A06铝合金高筋蒙皮热压成形实验研究,确定最佳工艺参数为:变形温度为350~400 ℃,保温时间为40 min以上,保压压力为6 MPa左右。
For high-stiffener integral panel of 5A06 aluminum alloy, the influence laws of structural dimensions for high-stiffener integral panel part and the process parameters during the thermal forming process, such as deformation temperature, holding time and holding pressure etc., on the dimension accuracy of thermal formed parts were studied. During the thermal forming of high-stiffener integral panel, with the increasing of the ratio of stiffener height to skin thickness, the surface indentation of skin increases, and the shrinkage of end face decreases. Then, with the increasing of the holding pressure and holding time, the surface indentation of skin decreases, the shrinkage of end face increases, the inclination angle of side face decreases, and the springback decreases. However, when the width of horizontal stiffener decreases, the surface indentation decreases, and the shrinkage of end face increases. Furthermore, when the width of horizontal stiffener is not bigger than 2 mm, the high stiffener wrinkles, and the deformation temperature has no significant effect on the surface indentation and the shrinkage of end face. Finally, according to experimental research on the thermal forming of high-stiffener integral panel for 5A06 aluminum alloy, the best process parameters are the holding temperature of 350-400 ℃, the holding time of 40 min or more and the holding pressure of 6 MPa.
基金项目:
国家自然科学基金青年科学基金项目(NSFC51805256)
作者简介:
秦中环(1989-),男,硕士,高级工程师,E-mail:qq344041159@126.com
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