Title: Study of Large-expansion-ratio Tube Hydroforming Processes with Movable Dies
Abstract: Tube hydroforming is a relatively new approach to manufacture light weight metal structures. As the manufacturing technology became advanced, demands of lighter and stronger metal structures are also increasing.The technique of large expation-ratio Tube Hydroforming with Movable Dies is designed for the demand. The product has features of large expansion ratio and different central axis. Traditional tube hydroforming is difficult to achieve this complicated metal product. Tube hydroforming with movable dies is proposed to enhance the capacity of tube hydroforming technology. With movable die design, product with more uniform thickness can be obtained, and the forming pressure becomes lower than that needed in tube hydroforming without movable dies. Finite element code LS-DYNA and DYNAFORM is used to analyze the plastic flow pattern of the tube. The loading paths of internal pressure, axial punches and movable dies for obtaining a sound product are determined by an adaptive simulation algorithm and the basic geometric analysis. The Compound Hydraulic Cylinders is designed for the experiment to verify our simulation. The low-carbon steel and stanless steel tubes are planned to be applied in the experiment.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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