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안승훈(Seunghoon Ahn),장홍석(HongSeok Jang),최호준(HoJoon Choi),박상철(Sangcheul Park),왕지남(Ginam Wang) (사)한국CDE학회 2009 한국CDE학회 논문집 Vol.14 No.4
The use of aluminum parts in automobile structural applications has increased in an effort to reduce the weight of cars and hence improve fuel economy. But Aluminum bar, I-beam and channels need other processes to vary the cross section in the axial direction. Thus, applications of these parts are limited by high cost. If the cross section of the part is variable by using only extrusion, application of extruded bar, I-beam and channels will increase in the Aluminum industries. In this paper, we propose the variable-shape extrusion process which can control the thickness of Aluminum bar. And we can calculate the speed of center ram by varying the cross section in the extrusion to control the thickness of Aluminum bar.