锻压技术

端部密封对薄壁零件粘性介质压力的影响

英文标题：Effect of end sealing on viscous medium pressure of thin-wall part

分类号：TG376

出版年,卷(期):页码：2014,39(3):10-15

摘要：

介绍了单位长度变径比较大的薄壁零件粘性介质外压缩径成形原理，利用有限元软件ANSYS/LS-DYNA对成形过程进行了数值模拟，对筒坯的端部密封压力及筒坯材料流动情况进行了分析，发现采用“先慢后快”端部密封压力加载方式可以有效地抑制成形区壁厚减薄。通过实验研究了密封圈的初始密封压力对端部位移量的影响，实验结果表明，在保证密封的前提下使其初始密封压力越小越好。

Pressure forming principle of viscous medium of thin-wall part tube-compression which has the characteristics of larger unit variable diameter ratio was introduced. The forming process was analyzed by finite element method (ANSYS/LS-DYNA). The effect of sealing pressure between tube-blank end and viscous medium on the forming process and the law of material flow were analyzed. Thickness reduction can be controlled by optimizing loading modes of end sealing pressure. The effect of initial sealing pressure of sealing ring on end displacement was conducted by experiment. The result shows that on the premise of guarantee the seal, the initial sealing pressure should be as small as possible.

基金项目：

国家自然科学基金资助项目(51275130)

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