外文翻譯--一項(xiàng)對提高成形性橢圓拉深過程的研究(文件)
【正文】 . Comparison of the experimental results and the finite element method (type C3).. Park et al. / Journal of Materials Processing Technology 113 (2001) 662—6654. ConclusionsThe crosssection of the product body, punch corner radius (Rp) and die corner radius (Rd) were considered as the main design parameters. This study focused on acquiring and quantifying process design variables such as the corner radii of the punch and die for elliptically shaped deepdrawing products. The results are summarized as follow.The optimal corner radii of the punch and die for the improvement of formability are proposed in the elliptical deep drawing process. The present analysis has been carried out for deep drawing process of an elliptical cup. The puted results along the corner radii of the punch and die were in better agreement with the experimental results.AcknowledgementsThis work was supported by the Engineering Research Center for Net Shape and Die Manufacturing (ERC/NSDM) at Pusan National University. 一項(xiàng)對提高成形性橢圓拉深過程的研究. Parka,*, . Kanga, . Parkb摘要沖床和模具圓角的半徑、潤滑劑條件、工作速度、壓邊力、摩擦力和間隙改變了拉深過程的可成形性。5) Young39。 (c) elliptical drawing. The corner radii of the punch (Rp) and die (Rd) were different for each process. The initial blankholder force was determined as the minimum force that could prevent the wrinkling of the blanks and was kept constant during the test for each deep drawing tests were performed at various corner radii in a 300 t mechanical press. The corner radii of the punch and die in first drawing were the three types mentioned in Table 3.Fig. 1. Dimensions of the tools (mm) used in the first drawing process.Table 2 Corner radius and clearance （t= mm）Process Corner radius (mm) Clearance (mm)First drawing Rp =15, Rd = 10 2 ( t)Redrawing Rp =12, Rd = 8 2 ( t)Elliptical drawing Rp =8, Rd = 5 Long side: ,short side: Table 3 Test conditions in first drawingType Rp (mm) Rd (mm)A3 16B3 16C3 16. Park et al. / Journal of Materials Processing Technology 113 (2001) 662—665. Blank shape and measurementThe final product is of an elliptical shape that consists of a circular arc at the long side and a straight line at the short side. The blank shape designed by trialanderror was simply fabricated with an equivalent surface area to the final product, and then a size of final blank was determined through many experiments [11—13]. Fig. 2 presents the blank shape designed by trialanderror. Figs. 3 and 4 present experimental results for each process of elliptical deep drawing. Measurement of the thickness distribution of the
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