【摘 要】
：
An LCD bottom chassis (LCD B/C) is a sheet metal for preventing the twisting of an LCD TV.Because the LCD B/C is produced by sheet metal forming process, springback, an elasto-plastic deformation beha
【机 构】
：
Graduate School of Mechanical Engineering, Hanyang University, 17, Haengdang-dong, Seongdong-gu, Seo
【出 处】
：
7th China-Japan-Korea Joint Symposium on Optimization of Str
论文部分内容阅读
An LCD bottom chassis (LCD B/C) is a sheet metal for preventing the twisting of an LCD TV.Because the LCD B/C is produced by sheet metal forming process, springback, an elasto-plastic deformation behavior of sheet metal, occurs.Therefore, flat beads are inserted on the LCD B/C for reducing springback.Generally, the lengths and number of flat beads of the LCD B/C are determined mostly depending on the know-how of experts who have many manufacturing experiences.In case of inserting fiat beads in various shapes of the LCD B/C depending on the know-how, unacceptable springback can be obtained and the try-out cost is added in manufacturing process.For this reason, the springback of the LCD B/C model which includes fiat beads is desired to be predicted using a CAE tool in the design process.However, this process is also depending on engineering experiences.Therefore, optimization technique is needed in addition to using a CAE tool.In this study, optimization of the lengths and number of flat beads for minimizing springback was performed.Springback as an objective function was defined by the difference between the maximum displacement and the minimum displacement in the direction perpendicular to the plane of the bottom chassis.These displacements were calculated using PAM-STAMP, one of the stamping analysis tools.On the other hand, 6 control points along the edges of the LCD B/C were chosen as design variables instead of directly choosing the lengths and number of flat beads.This helps reducing the number of design variables for enhancing optimization efficiency.The design process was performed using PIAnO, one of the commercial process integration and design optimization (PIDO) tool.As a bead optimization result, the springback of the optimum bead model decreased by 10.1% compared to that of the initial bead model.
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