Transactions of Materials and Heat Treatment

Title：Medium performance research used in the viscous pressure forming

Authors： DENG Ming~(1 2) LUO Guang-ping~(1)(1.School of Material Science and Engineering Chongqing Institute of Technology Chongqing 400050 china 2.State Key Laboratory of Plastic Forming Simulation and Die & Mould Technology Huazhong University of Science and Tec

Unit：

KeyWords： viscous pressure forming(VPF) viscous medium silicone oil

ClassificationCode：TG301

year,vol(issue):pagenumber：2006,31(5):51-54

Abstract：

Viscous Pressure Forming(VPF) uses a kind of semi-solid,flowable and viscous medium as pressure-carrying medium.Viscous medium has great effects on the deformation of sheet metal.According to the request of the viscous medium pressure forming,this paper chooses three kinds medium materials with different molecular weights and discusses their basic physical performance.Dynamic shear rheometer(DSR) is used to analyze the rheologic properties of viscous medium.Through tests,the relationship curves between rotational speed and torque of three different kinds medium and the changing law of stress and strain changed with time are obtained.Viscous medium extrusion equipment is designed and manufactured.Through carrying out the extrusion tests of three kinds of viscous mediums,the relationship curves between the extrusion speeds and extrusion force for different extrusion ratio are obtained.Experimental results show that the extrusion force of viscous medium increases with increasing extrusion speed and viscous medium is of very strong strain rate sensitivity.

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Reference：

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