The driving efficiency in vehicles depends on a weight lightening of wheels. Lightweight aluminum wheel research has been widespread over the years. Carbon wheels reduce weight by 50% compared to aluminum wheels and have high tensile strength and low heat absorption. This study was investigated to apply the carbon fiber of molding pressure to produce the carbon wheel. Carbon wheel of mold structure analysis was performed.

In this paper, research development about a bladder press forming system has been carried out for sheet metal forming. The bladder press forming system consists largely of three units as follows forming process unit, driving unit and hydraulic power unit including bladder. Structural analysis of frame of total system by the ANSYS program, flow analysis of bladder by CFX version 14 and hydraulic circuit analysis by AMESim were carried for basic design of bladder press forming system. We can get a good forming results from bladder press system. Developed bladder press forming system will be largely used in aircraft manufacturing industry field.

The objective of this study is to predict the formability of sheet metal for the bladder press. The static implicit finite element method is applied effectively to analyze bladder forming processes using AutoForm software. The material used for forming analysis is AL2024, and the thickness of the plate is 1.6mm, 1.8mm and 2.0mm. Forming force is shown by 101.92kN～87.22kN. The result from the simulation analysis was applied to the bladder press system.