新型管材冲击液压成形装置的设计

发布时间：2018-06-22 11:58

本文选题：管材 + 冲击液压成形　；参考：《锻压技术》2017年06期

【摘要】：针对常规的管材液压成形技术需要昂贵的专用设备及模具、生产效率低等不足,开发了一种简单实用、可在冲床或压力机上使用的管材冲击液压成形装置,可用于薄壁金属管材的自然胀形、轴压胀形和异形截面中空件的冲击液压成形。该装置无需外部高压供给系统和专用液压成形设备,通过撞击轴压头挤压容腔中液体的方式来为管材提供液压力和轴压力。通过设计轴压头的行程和调节溢流阀的溢流压力值等来实现最大液压力和轴向进给量的合理匹配,并以304不锈钢毛细管和H65黄铜毛细管为试验管材做了相关试验。研究结果表明:该装置结构简单、操作方便;可实现最大液压力与轴向进给量的协调控制;合理的载荷匹配能显著地提高管材冲击液压成形的成形性能;H65黄铜毛细管破裂时所需的液压力小于304不锈钢毛细管破裂时所需的液压力。
[Abstract]:In view of the disadvantages of conventional pipe hydroforming technology, such as expensive special equipment and die, low production efficiency and so on, a simple and practical pipe impact hydroforming device is developed, which can be used in punching machine or press. It can be used for natural bulging, axial bulging and impact hydroforming of hollow parts with special section. This device does not need the external high pressure supply system and special hydroforming equipment to provide the pipe with liquid pressure and axial pressure by pressing the liquid in the chamber by impinging the shaft head. By designing the stroke of the shaft head and adjusting the relief pressure value of the relief valve, the optimum matching of the maximum liquid pressure and the axial feed quantity is realized, and the related tests are done with 304 stainless steel capillary and H65 brass capillary as the test tube. The results show that the device has the advantages of simple structure, convenient operation, coordinated control of maximum hydraulic pressure and axial feed. Reasonable load matching can significantly improve the formability of tube under impact hydroforming. The hydraulic force required for H65 brass capillary rupture is less than the liquid pressure required for 304 stainless steel capillary rupture.
【作者单位】：桂林电子科技大学机电工程学院;
【基金】：国家自然科学基金资助项目(51564007) 广西自然科学基金资助项目(2013GXNSFAA019305)
【分类号】：TG305

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