Abstract
During the hot extrusion, material flow uniformity plays an important role in the extrusion process and product quality. In practice, material flow could be balanced by many means, e.g. by adjusting the layout and shapes of portholes, by designing various levels of welding chamber, or by taking various bearing lengths. The purpose of this study was to optimize layout and heights of baffle plates in the welding chamber in order to balance material flow. First, the extrusion process was simulated by means of HyperXtrude. Due to the large velocity difference in the cross-section of the profile obtained from initial numerical simulation, baffle plates would be adjusted. By several adjustments, an optimal die structure with uniform material flow velocity in the cross-section of the extrudate was obtained and a sound profile produced. Therefore, baffle plates could effectively balance material flow during the extrusion process and this study could provide effective guidance for practical production.
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