第42卷第6期 Vol. 42No. 6
假压技木
FORGING & STAMPING TECHNOLOGY
新型管材冲击液压成形装置的设计
李坤，杨连发，魏军，马建平，翟志方，张明河
（桂林电子科技大学机电工程学院，广西桂林541004）
2017年6月 Jun2017
摘要：针对常规的管材液压成形技术需要昂费的专用设备及模具、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波压成形设备，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澄流阅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波压力
关键词：管材；冲击液压成形；最大液压力；轴向进给量；载荷匹配 DOI: 10. 13330/j. issn. 1000-3940. 2017. 06. 015
中图分类号：TG315.4
文献标识码：A
文章编号：1000-3940（2017）06-0077-05
Design on a new type of tube impact hydroforming equipment
Li Kun, Yang Lianfa, Wei Jun, Ma Jianping, Zhai Zhifang, Zhang Minghe
( Faculty of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China)
Abstract: For the problems of conventional tube hydroforming requiring expensive special equipment and die with low production efficien cy, a simple and practical devioe was developed as tube impact hydroforming equipment used on a stamping press or press machine. This new device could be applied to the spontaneous bulging, the axial force bulging and the impact hydroforming to manufacture hollow parts with various eross sectional area of thin walled metal tubes. Without the extemal high pressure supply system and special hydroforming equipment, the intemal hydraulic pressure and axial force on the tube could be obtained automatically by extruding the liquid in a chamber through impacting the axial compression head, and a reasonable matching between the maximum hydraulic pressure and axial feed could be achieved by properly designing the axial compression head and the overflow pressure value of relief valve. Furthermore, the relevant test was done by 304 stainless steel capillary and H65 brass capillary. The primary experimental results show that the derice has characteristics of simple structure and convenient operation, and it can realize a coordinated control between the maximum hydraulic pressure and the axi-al feed. However, the forming ability of tubes is improved greatly under a reasonable load matching, and the hydraulic pressure of H65 brass capillary rupture is lower than that of 304 stainless steel capillary rupture.
Key words : tube; impact hydroforming; the maximum hydraulic pressure; axial feed; load matching
冲击液压成形技术（LiquidImpactForming， LIF）是在管材液压成形技术（TubeHydro-Forming， THF）的基础上进行改进的。THF是用于生产截面形状复杂的薄壁管状零件的一种先进、特殊、精密
收稿日期：20161123；修订日期：20170130
基金项目：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）
作者简介：李坤（1989-），男，硕士研究生 E-mail : LiKunAndrew@ 163. com
作者简介：杨连发（1965-），男，博士，教投 E-mail: y-lianfa@ 163. com
万方数据
（半精密）的净成形技术，具有成本低、工序少、质量轻、刚度高等特点，但是常规的THF技术需要昂责的专用设备及模具，而且生产效率低（只有传统冲压方法的1/3）1-3]。针对THF技术的不足，美国GreenvilleTool&Die公司最近提出一种新型成形
技术一
一LIF技术。LIF技术是一种通过结合冲击和
液压成形，将薄壁管或薄壁板成形为不同形状零件的成形技术，其原理是液体介质受到高速运动的冲击体挤压，瞬时变为高压液体而作用于零件表面，进而获得期望的胀形件。该技术因具有成形速度快、成形质量高、成本低等特点而被应用于汽车、航空
特种成形栏目是由北京机电研究所塑性工程技术中心①赞助刊出