摘要
通过推压-拉拔复合缩径的力学模型定性分析了不同外径芯轴缩径时管坯的受力及变形差异,并给出了芯轴外径设计公式;针对某载重6.5 t胀压成形汽车桥壳管件的第一道次推压-拉拔复合缩径,设定不同的芯轴外径影响系数并进行了有限元模拟,分析了芯轴外径对管坯缩径成形的影响规律,基于传力区不失稳及管端不开裂给出了芯轴外径影响系数的设定范围;在专用设备上进行了第一道次推压-拉拔复合缩径试验,成功试制出缩径样件,试验结果与有限元模拟结果相吻合。
The differences of stresses and deformations with different mandrel diameters were analyzed,through the analyses of the pushing-pulling necking mechanical model.A design method of mandrel diameter was proposed based on the analysis results.The finite element model was established for the first necking processes of 6.5 t bulging-pressing axle housing,and the influences of the mandrel diameters on forming rules were analyzed.A appropriate range of mandrel diameters was given based on the conditions that the tubes were not easy to wrinkle and crack.The experiments of the first pushing-pulling necking processes were carried out on the special equipment,and the forming results with three different mandrel diameters are consistent with that from the finite element simulation.
作者
王连东
刘超
刘恒
王晓迪
王志鹏
WANG Liandong;LIU Chao;LIU Heng;WANG Xiaodi;WANG Zhipeng(College of Vehicles and Energy,Yanshan University,Qinhuangdao,Hebei,066004;Department of Transportation and Vehicle Engineering,Tangshan University,Tangshan,Hebei,063000;College of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2018年第17期2131-2136,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)
