文章摘要
樊振中,张东,韩金全,等.压弯半径对7A85结构壁板退火展平成形尺寸与组织性能的影响研究[J].精密成形工程,2022,14(9):50-59.
FAN Zhen-zhong,ZHANG Dong,HAN Jin-quan,et al.Effect of Bending Radius on Annealing Flattening Size and Microstructural Properties of 7A85 Structural Panel[J].Journal of Netshape Forming Engineering,2022,14(9):50-59.
压弯半径对7A85结构壁板退火展平成形尺寸与组织性能的影响研究
Effect of Bending Radius on Annealing Flattening Size and Microstructural Properties of 7A85 Structural Panel
  
DOI:10.3969/j.issn.1674-6457.2022.09.007
中文关键词: 7A85铝合金  结构壁板  压弯半径  退火压平  成形尺寸  组织性能
英文关键词: 7A85 aluminum alloy  structural panel  bending radius  annealing flattening  forming size  microstructural properties
基金项目:
作者单位
樊振中 中国航发北京航空材料研究院北京 100095
北京市先进铝合金材料及应用工程技术研究中心北京 100095 
张东 北京宇航系统工程研究所北京 100076 
韩金全 北京航空航天大学北京 100191 
魏佳乐 中国航发北京航空材料研究院北京 100095
北京市先进铝合金材料及应用工程技术研究中心北京 100095 
许晨玲 大连汇程铝业有限公司辽宁 大连 116105 
陆政 中国航发北京航空材料研究院北京 100095
北京市先进铝合金材料及应用工程技术研究中心北京 100095 
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中文摘要:
      目的 为满足结构舱段用高强高韧铝合金宽幅薄壁高筋整体成形壁板的精密制备需求,在材料退火组织状态下,结合不同压弯半径展平工装,实现7A85结构壁板的展平处理。方法 采用ABAQUS有限元软件计算不同压弯半径下的结构回弹尺寸,采用万能力学性能试验机测试不同区域的力学性能,结合扫描电镜完成组织形貌与断口形貌的观察。结果 随着压弯半径的增大,7A85铝合金结构壁板蒙皮区域的应力峰值持续下降,结构回弹尺寸误差先下降后上升,立筋区域的应力峰值持续下降,结构回弹尺寸误差先下降后上升。当FSW加厚区进行压弯时,随着压弯间隙的增大,应力峰值持续下降,随着压弯半径的增大,应力峰值先上升后下降,结构回弹尺寸误差明显提高。结论 结合7A85铝合金挤压圆筒不同区域金属型退火展平模具,成功制备出了幅长为8 000 mm、幅宽为1 280 mm的7A85铝合金结构壁板。
英文摘要:
      The work aims to meet the precise preparation requirements of high-strength and high-toughness wide thin-wall high-reinforcement integrally-formed aluminum alloy panel for structural cabin, so as to flatten the 7A85 structural panel by combining flattening tools with different bending radii under the annealing microstructure of the materials. The rebound structural size under different bending radii was calculated by ABAQUS FEM software, the mechanical properties were tested by universal testing machine, and the microstructure and fracture morphology were observed by scanning electron microscopy. The peak stress inside the skin regions of 7A85 aluminum alloy structural panel decreased with the increase of bending radius, and the rebound structural size error decreased firstly and then increased. The peak stress in the vertical reinforcement area continued to decrease, and the rebound structural size error decreased firstly and then increased. When FSW thickened area was subject to bending, the peak stress decreased continuously with the increase of bending gap. With the increase of bending radius, the peak stress firstly increased and then decreased, and the rebound structural size error increased obviously. Combined with metal mold annealing flattening dies of 7A85 aluminum alloy extrusion cylinder in different areas, 7A85 aluminum alloy structural panel with a width of 1 280 mm and a length of 8 000 mm is successfully prepared.
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