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Development of An Optimal Layout Design System in Multihole Blanking Process  

Lee, Sun-Bong (Engineering Research Center for Net Shape and Die Manufacturing, Busan University)
Kim, Dong-Hwan (Department of Automotive Engineering, Jinju International University)
Kim, Byung-Min (Engineering Research Center for Net Shape and Die Manufacturing, Busan University)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.5, no.1, 2004 , pp. 36-41 More about this Journal
Abstract
The blanking of thin sheet metal using progressive dies is an important process on production of precision electronic machine parts such as IC leadframe. This paper summarizes the results of simulating the progressive blanking process by means of LS/DYNA. In order to verify the influence of blanking order on the final lead profile and deformed configuration, simulation technique has been proposed and analyzed using a commercial FEM code, LS/DYNA. The results of FE-simulations are in good agreement with the experimental result. After then, to construct rule base in progressive blanking process, FE-simulation has been performed using a simple model. Based on this result rule base is set up and then the blanking order of inner lead is rearranged. Consequently, from the results of FE-simulation using suggested method in this paper, it is possible to predict the shift of lead to manufacture high precision lead frame in progressive blanking process. The proposed method can give more systematic and economically feasible means for designing progressive blanking process.
Keywords
Optimal blanking order; Leadframe; Lead shift; FE-simulation; Progressive blanking process;
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