Hongyang LI
,
Shijian YUAN
,
Kun DAI
,
Lihui LANG
,
Xiaosong WANG
,
Zhubin HE
,
Zhongren WANG
材料科学技术（英）
The influence of loading path on tube hydroforming process is discussed in this paper with finite-element simulation. Four different loading paths are utilized in simulating the forming process of square tubular component with hydroforming and the result of different loading path is presented. Among the result, the thickness distribution of bilinear loading path is the most uniform one. It shows that the increase of punch displacement in the stage of high pressure is beneficial to the forming of component for optimized stress condition.
关键词:
Gang LIU
,
Shijian YUAN
,
Mingxue ZHANG
,
Longbiao CHI
材料科学技术（英）
A numerical simulation on the rotary forging process of a flange is conducted by three-dimensional rigid-plastic finite element method. The states of stress and strain rate in the workpiece are analyzed and the forging mechanism of the flange is revealed. Moreover, the influence of the die configuration on the material flow is also analyzed.
关键词:
Gang LIU
,
Xuelian YIN
,
Shijian YUAN
材料科学技术（英）
Buckling and forming processes of tubes with varying slenderness ratio (ratio of length to diameter) under external hydraulic pressure were analyzed with three-dimensional finite element method (FEM) for studying tube external pressure forming (EPF). Buckling pressures for different tube blanks without mandrel were predicted, and an EPF of a carbon steel tube onto a mandrel with six ribs was simulated. Both thickness distribution and buckling pressure from the simulations were found to be in agreement with those from experiments. Buckling pressures are shown to be a function of the slenderness ratio. The tubular part with six ribs produced by EPF has a uniform thickness distribution, whose maximum thinning rate is only 5.9%.
关键词:
External pressure forming
,
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,
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,
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