Transactions of Materials and Heat Treatment

Title：Design on a new type of tube impact hydroforming equipment

Authors： Li Kun Yang Lianfa Wei Jun Ma Jianping Zhai Zhifang Zhang Minghe

Unit： Guilin University of Electronic Technology

KeyWords： tube impact hydroforming the maximum hydraulic pressure axial feed load matching

ClassificationCode：TG315.4

year,vol(issue):pagenumber：2017,42(6):77-81

Abstract：

For the problems of conventional tube hydroforming requiring expensive special equipment and die with low production efficiency, a simple and practical device 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 cross-sectional area of thin-walled metal tubes. Without the external high pressure supply system and special hydroforming equipment, the internal 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 device has characteristics of simple structure and convenient operation, and it can realize a coordinated control between the maximum hydraulic pressure and the axial 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.

Funds：

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）

李坤（1989-），男，硕士研究生杨连发（1965-），男，博士，教授

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