摘要
通过测量、分析某载重6.5 t胀压成形汽车桥壳用钢管的轴向及周向的壁厚,建立了带壁厚偏差管坯的几何模型及推压-拉拔复合缩径的力学模型,分析了薄壁侧、厚壁侧管坯的受力及变形差异;通过对不同壁厚偏差管坯两侧的推压-拉拔复合缩径进行数值模拟,揭示了壁厚偏差对传力区应力及管坯壁厚的影响规律,并基于传力区不失稳条件给出了初始管坯的周向壁厚偏差的最大值;在专用缩径设备上成功试制出缩径样件,试验结果与有限元模拟所得规律一致。
A geometric model of tube with wall thickness deviation and a mechanics model of push-pullnecking were established,through measuring wall thickness distribution of the tube used in 6.5 t automobileaxle-housing. The difference of stress and deformation between the side of thinner and thicker wall of tube wereanalyzed. The numerical simulation of the different wall thickness deviations was set up,and the influences ofthe deviations on the stresses of the transmission area and law of wall thickness deformations were revealed. Inaddition,the maximum value of the circumferential wall thickness deviations of the tube were given based onthe stability of the transmission area. The samples were successfully produced on the special nenckingequipment. The experimental results are consistent with the finite element simulation.
作者
刘超
王连东
刘恒
高缘
王志鹏
LIU Chao;WANG Liandong;LIU Heng;GAO Yuan;WANG Zhipeng(College of Vehicles and Energy, Yanshan University, Qinhuangdao, Hebei, 066004;Hebei Institute of Mechatronic Technology, Xingtai, Hebei, 054000)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2018年第11期1375-1379,1385,共6页
China Mechanical Engineering
基金
河北省自然科学基金资助项目(E2016203352)
燕山大学研究生创新基金资助项目(2017XJSS056)
关键词
无缝钢管
壁厚偏差
管坯几何模型
推压-拉拔复合缩径
seamless steel tube
wall thickness deviation
geometric model of tube blank
pushing-pulling necking
