管材多点柔性拉弯成形制件形状误差研究  

Error Study of the Shape Deviation for Multi-Point Flexible 3D Stretch Bending Rectangular Tube Part

作　　者：李义[1,2] 梁策[1,2] 于佳奇 梁继才[1,3] 陈广义[4] LI Yi;LIANG Ce;YU Jiaqi;LIANG Jicai;CHEN Guangyi(Key Laboratory of Automobile Materials of the Ministry of Education,Jilin University,Changchun 130025,Jilin,China;College of Materials Science and Engineering,Jilin University,Changchun 130025,Jilin,China;Roll Forging Institute,Jilin University,Changchun 130025,Jilin,China;School of Automotive Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]吉林大学汽车材料教育部重点实验室,吉林长春130025 [2]吉林大学材料科学与工程学院,吉林长春130025 [3]吉林大学辊锻工艺研究所,吉林长春130025 [4]大连理工大学汽车工程学院,辽宁大连116024

出　　处：《华南理工大学学报（自然科学版）》2018年第7期24-29,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51675225);吉林省发展和改革委员会资助项目(2016C036)~~

摘　　要：针对型材三维成形易出现的凹陷、凸起等截面变形问题,在自主研发的拉弯成形装置基础上,选取矩形管状铝合金型材进行了多点柔性成形制件的形状误差研究,分析了制件横截面高度、宽度方向的变形沿制件长度方向的变化.结果表明:成形过程中,矩形管材制件的上、下表面发生内凹变形,随着制件由对称中心点向两侧对称长度的增加,凹陷率和内凹变形均增大,且上表面的内凹值略大于下表面内凹值;成形过程中,制件的内、外垂直表面出现外凸变形,并且随着对称中心点向两侧对称长度的增加,凸胀率和外凸变形量更大.Referring to the section deformation problem of 3D stretch bending profile,the shape deviation and influential factors of section deformation for multi-point flexible 3D stretch bending profile is investigated on the basis of the independent developed equipment;and the effect of part axial length on part cross section height/width deformation is analyzed.The experiment result shows that,on the upper/lower surface of rectangular tube part,both the concave percentage and concave deformation of part emerged and rose with the increased length from the bending symmetric center point to two sides along with axial direction,the concave deformation value on upper surface is bigger than that of lower surface;both the convex percentage and convex deformation emerged on the inside and outside vertical surface,and the convex percentage and convex deformation value rose with the increased length from the bending symmetric central point to two sides along with axial direction.

关 键 词：矩形管状铝合金型材 多点柔性拉弯成形 形状误差 内凹变形量 外凸变形量 

分 类 号：TG356[金属学及工艺—金属压力加工]