Abstract
The production improvement model in deep drawing process for air filter had used finite element method(FEM) in the analysis to optimize product design. The standard material SPCE thickness of 0.6 mm was used to produce the cup of diameter 102 mm and height 145 mm. High quantities of rejected products were discovered with crack defects, which caused the production to be less competitive in the market. Therefore, the improvement of production design had been considered for designing the suitable processes. New improvement consisted of 5 processes which drawing ratio had been design forβ=1.5, 1.5, 1.1, 1.8, and 1.07 respectively. In the analysis, the material properties assumed to behave as elastic-plastic according to power law of Ludwik with K = 320 N/mm2 and n = 0.085. According to Hill Law, the anisotropy of sheet metal were r0=1.87 r45= 1.30 and r90= 2.14. From the predicted results, the formability of high cup cannot be drawn within a single process. The part size should be reduced with suitable drawing ratio which had decreased the least sheet thickness. The simulation results of strain on parts located within the forming limit diagram (FLD), which the lowest part thickness was 0.53 mm without damage occurred. Thus stress and strain occurred at fracture were comparable to the Gurson Model(GTN). From the analysis of deep drawing process for producing filter, the production processes efficiency and product quality can be improved; in order to increase the capabilities.Keywords : Deep drawing process, Finite Element Method (FEM), Drawing ratio
