中国机械工程

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芯轴外径对大变形推压-拉拔复合缩径的影响

王连东1;刘超1,2;刘恒1;王晓迪3;王志鹏1   

  1. 1.燕山大学车辆与能源学院,秦皇岛,066004
    2.唐山学院交通与车辆工程系,唐山,063000
    3.燕山大学机械工程学院,秦皇岛,066004
  • 出版日期:2018-09-10 发布日期:2018-09-04
  • 基金资助:
    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)
    Hebei Provincial Natural Science Foundation of China (No. E2016203352)

Effects of Mandrel Diameters on Large Deformation Pushing-pulling Necking

WANG Liandong1;LIU Chao1,2;LIU Heng1;WANG Xiaodi3;WANG Zhipeng1   

  1. 1.College of Vehicles and Energy,Yanshan University,Qinhuangdao,Hebei,066004
    2.Department of Transportation and Vehicle Engineering,Tangshan University,Tangshan,Hebei,063000
    3.College of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004
  • Online:2018-09-10 Published:2018-09-04
  • Supported by:
    Hebei Provincial Natural Science Foundation of China (No. E2016203352)

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。

关键词: 芯轴外径, 芯轴外径影响系数, 设计方法, 推压-拉拔复合缩径

Abstract: 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.

Key words: mandrel diameter, mandrel diameter influence factor, design method, pushing-pulling necking

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