Abstract
In this paper, a study on the aluminum tube extrusion with a porthole die for deconcentrated welding lines is carried out. The porthole die is consisted of a die mandrel with six inlet ports and two die caps. The aluminum material is extruded into six segments in the die mandrel with six inlets and then inner three of them are welded to compose the inner tube in fist die cap and the others are welded to compose the outer tube in the second die cap. The outer tube has different position of the welding lines to them of the inner tube. In the second die cap, two tubes are welded. The metal flow in the extrusion is analyzed with rigid plastic FEM. The position of welding lines between the inner and the outer tube are predicted. The extrusion experiment is performed and the design of the porthole die is modified to balance the position of the welding line. The extruded profile is tested to evaluate the improvement of the mechanical properties compared to the general porthole extrusion. It is confirmed that the mechanical properties are improved compared to the general porthole extrusion tube.
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Recommended by Associate Editor Dae-Cheol Ko
Min Kuk Choi received his Ph.D. degree from KAIST, Korea, in 2017. He is currently a Senior Researcher at the Agency for Defense Development. His research interests include evaluation of high speed mechanical properties and its application to numerical simulation.
Young Choi received his B.S., M.S. and Ph.D. degrees from Pusan National University, Korea, in 1993, 1995, 1999, respectively. He is currently a Principal Researcher at the Korea Institute of Industrial Technology in Korea. His research interests include simulation of metal forming, high energy rate forming and evaluating of material properties of metal.
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Choi, M.K., Park, CG., Choi, Y. et al. Aluminum tube extrusion with the porthole die for deconcentrated welding lines. J Mech Sci Technol 32, 2245–2251 (2018). https://doi.org/10.1007/s12206-018-0435-y
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DOI: https://doi.org/10.1007/s12206-018-0435-y