Hydro-forming technology is a technology that will replace the existing press-forming technology and is used in various industry range from automotive parts to electronic products. The advantage of this technology is that it has dramatically changed the existing processing method, and it can be said that the process reduction due to the reduction of parts, cost reduction, and high precision are mentioned. In this study, it is intended to present a design process using computer simulation by changing the sub-frame for automotive parts produced with the existing press forming technology to the hide-forming method. To this end, it is intended to use it as part design data by comparatively analyzing the cross-sectional shape and thickness reduction, which are the major factors necessary to determine the successful development of the developed parts.

Hydroforming is a forming technology in which a steel tube is fixed in a die and formed to fit a specified design shape by applying hydraulic pressure from inside the tube. In present study, the whole process of sub-frame side member development is presented by tube hydro-forming using steel material. At the part design stage, it requires feasibility study and process design aided by CAE (computer aided design) to confirm hydro-formability in details. Overall possibility of hydro-formable side member parts could be examined by cross sectional analyses. All the components is designed and formability is examined from the point of geometry and thinning. From the simulation results, the maximum thickness reduction rate is 55% after hydroforming. In order to improve this result, the feeding by 30 mm is applied to the both sides of the tube and the thickness reduction can be reduced from this management.

The aim of this research is to expand application areas of the advanced manufacturing concept and technology based on combining the traditional weaving techniques with digital forming technology. Through the man-machine interface of traditional weaving techniques of processing machines and craftsmanship complex data visualization and interactive operation, Virtual Reality Technology can realize computer model images, which is a kind of new form of artistic language and the key of VR art presenting its unique advantages. Combined with digital technology, the production of raw materials can generate 2D graphics, and 3D object can also be generated by using rapid solidification laser material preparation and forming technology (3-Dimension Printing). In one word, the traditional weaving techniques of processing machine and craftsmanship realized the complete inheritance. In this paper, main content are 4 parts including the analysis of ethnic traditional weaving technology in southwest areas of China, the usage of fashion digital simulation forming technology, the combination of traditional weaving technology with digital forming technology, and expanding of digital customized technology. We started our research work using grass linen and its weaving machine. In the end, the conclusion of study will be used to build the digital museum online for Southwest Ethnic Traditional Weaving Technology Museum, which is also bridging around world marketing for traditional culture.

Hydroforming is a forming technology in which a steel tube is set in a die and formed to fit a specified shape by applying hydraulic pressure from inside the tube while also applying force in the tube axial direction (axial feed). In present study, the whole process of automotive cross members simulation and development by hydroforming technology to apply high strength steel is covered. At the part design stage, it requires feasibility study and process design aided by CAE(Computer Aided Design) to confirm hydroformability in details. Overall possibility of hydroformable cross members parts could be examined by cross sectional analyses. Moreover, it is essential to ensure the formability of tube material on every forming step such as pre-bending, preforming and hydroforming. At the die design stage, all the components of prototyping tool are designed and interference with press is investigated from the point of geometry and thinning.