Transactions of Materials and Heat Treatment

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

Authors： LI Ji-guang GONG Hai-lan WANG Zhong-jin

Unit： Harbin Institute of Technology Deng Yun College of Science and Technology

KeyWords： viscous medium pressure forming tube-compression variable diameter parts FEA

ClassificationCode：TG376

year,vol(issue):pagenumber：2010,35(3):91-94

Abstract：

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.

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Reference：

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