锻压技术

薄壁零件粘性介质外压多道次缩径研究

英文标题：Research on multi-steps tube-compression of thin-wall parts with variable diameter by viscous medium pressure forming

作者：李继光宫海兰王忠金

单位：哈尔滨工业大学材料科学与工程学院昆山登云科技职业学院机电工程系

关键词：粘性介质压力成形缩径薄壁零件有限元分析

分类号：TG376

出版年,卷(期):页码：2010,35(3):91-94

摘要：

提出了粘性介质压力缩径成形方法，利用粘性介质力学性能和易于实现的加载方式，延缓缩径过程失稳并在一定条件下消除失稳产生的褶皱，提高极限缩径量。多道次成形可以将一个较大的目标变形量分成多步小变形，控制每道次变形于失稳起皱范围内，较一次成形可以显著提高材料成形能力。采用有限元分析的方法研究了粘性介质外压多道次的缩径过程，得到了每一道次缩径后长径比和壁厚变化综合作用影响下一道次极限缩径量的结论。

The viscous medium pressure forming (VMPF) method was proposed for solving the problems in tube-compression. Utilizing the mechanical property and easily achieved loading mode of viscous medium, the buckling in the tube-compression process was delayed and wrinkles caused by buckling were eliminated, so as to increase the diameter reduction ratio limit. The multi-steps forming could divide the large total deformation into much small deformation, thus the small deformation could be controlled in the range of buckling and wrinkling. The process has more ability to improve material‘s forming capability than one-step forming. The deformation of the multi-steps tube-compression process by VPF was analyzed by finite element method (FEM). The variation of length-to-diameter and wall thickness after each step forming has influence on the next step compression.

基金项目：

参考文献：

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