Gas Blow Forming 공법을 적용한 스틸튜브재 확관성형 공정에 관한 연구

Due to the high demanding for fuel efficiency and more strict regulation for CO2 emission, automotive companies have focused their R&D activities onto the reduction of body and chassis components by using high strength steel. Some of the companies have used gas blow forming process for aluminum extrusion parts since it can be formed under the 500℃. However, its commercialization has been limited due to the high cost of aluminum alloys and relatively low strength compared to that of steel. Thus, in this research, steel tube has been gas blow formed under high temperature for a chassis application, and optimized design and process parameters have been studied. Tube bending and bulge forming simulation has been carried out, and it was compared to the experimental results.