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한철호,김영득 國立金烏工科大學校附設生産技術硏究所 1994 産業技術開發硏究 Vol.10 No.-
Effect of some process variables such as area reduction, stroke advance, materials on the extrusion load, plastic flow and height ratio of upper to lower extruded parts in the backward-forward extrusion of socket shaped parts are experimentally investigated and analyzed. Deformed pattern is visualized by photo-etching technique using half-cut billets splitted. The influence of using split and original specimen on the extrusion load and height ratio is examined by experiment. Aluminum 2024 and commercial pure copper are employed as working materials. Die setup is installed on the UTM and experiments are carried out at room temperature.