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Numerical and Experimental Investigation on the Tube Forming in the Radial-Forward Extrusion  

Ko Beong-Du (Department of Automation Engineering, Inha University)
Jang Dong-Hwan (Department of Automation Engineering, Inha University)
Choi Ho-Joon (Department of Automation Engineering, Inha University)
Hwang Beong-Bok (Department of Mechanical Engineering, Inha University)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.6, no.2, 2005 , pp. 26-33 More about this Journal
Abstract
In this paper, the tube forming by radial-forward extrusion is analyzed by numerical simulation and experiments. The paper discusses the effect of process variables such as gap height, relative gap width and die comer radius on tube forming. The influence of deformation patterns of flange in radial extrusion on forward extrusion for tube forming is investigated and summarized in terms of the maximum forming force and hardness variations along the extrusion path. Furthermore the external defects are shown experimentally during the forming operation. Based on finite element analysis in conjunction with experimental test in Al alloy, analysis is performed for important parameter combination in order to reduce forming defects. Eventually, the process parameters for safe forming are suggested in order to reduce the forming defects.
Keywords
Combined extrusion; Radial-forward extrusion; Tube forming; Tool geometry; Forming defect;
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