锻压技术

管材脉动液压成形时接触压强与液体压强关系的研究

英文标题：Research on the relationship of contact pressure and hydraulic pressure in the tube pulsating hydroforming

作者：何玉林吴春蕾杨连发

单位：桂林电子科技大学

分类号：

出版年,卷(期):页码：2015,40(10):29-34

摘要：

采用商业有限元软件ABAQUS，建立了管材液压成形有限元模型，分别在非脉动和脉动液压加载下对管材液压成形过程进行了有限元仿真，并通过试验对有限元模型进行了验证。研究结果表明：在不同脉动液压振幅和频率加载下，接触压强均小于液体压强，而且随着管材的胀形，接触压强逐渐接近液体压强，当胀形结束时，接触压强与液体压强的差值为20%左右；脉动液压振幅越大及频率越高，则接触压强波动也越大；脉动液压振幅越大，接触压强越接近液体压强，但在脉动液压频率大小合适时，接触压强最接近液体压强。

The finite element model of tube hydroforming was established by the commercial software ABAQUS，and the FE simulations under non-pulsating and pulsating pressures were conducted. The finite element model was verified through tests. The results show that the contact pressure is always less than the hydraulic pressure under different pulsating hydraulic amplitudes and frequencies, and it gradually approaches the hydraulic pressure with the tube bulging. When the tube finishes bulging, the difference between them is about 20%. The larger the pulsating hydraulic amplitude and the frequency are, the higher the fluctuation of the contact pressure is and the closer the contact pressure is to the hydraulic pressure. When the frequency is suitable, the contact pressure is closer to the hydraulic pressure.

基金项目：

广西自然科学基金资助项目(2013GXNSFAA019305)；制造系统与先进制造技术广西重点实验室基金项目(14-045-15-005Z)

何玉林（1980－），女，硕士，讲师

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