| 摘要 |
PROBLEM TO BE SOLVED: To present an optimal press forming condition in order to obtain a desired natural frequency and deformation mode in a component being a final product in consideration of effects of a change in the plate thickness and hardening caused by plastic working in manufacturing a formed article. SOLUTION: In a method for designing a highly rigid component, a computer performs a press forming analysis based on press forming conditions such as a shape of the formed article, amount of punch movement, loading for wrinkle pressing, friction coefficient, relation between stress and strain of material, and plate thickness, to calculate the distribution of the plate thickness of the formed article; and also performs a dynamic stiffness analysis based on conditions for a dynamic stiffness analysis such as the distribution of the plate thickness of the formed article and a component shape manufactured by assembling the formed article, to calculate the natural frequency. In the method, the computer repeats the calculation predetermined times while changing at least one or more of the press forming conditions, and outputs the maximum value of the natural frequency or the press forming condition providing a stable region as the optimal press forming condition. COPYRIGHT: (C)2008,JPO&INPIT
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