Browse > Article
http://dx.doi.org/10.5228/KSPP.2006.15.6.428

Friction Characteristics on the Sheet Metal Blanking of Leadframe  

Ko, D.C. (부산대학교 동남권부품소재산학협력혁신연구소)
Kim, D.H. (진주국제대학교 자동차공학과)
Kim, M.K. (창원전문대학 자동차기계계열)
Kim, B.M. (부산대학교 정밀정형 및 금형가공 연구소)
Publication Information
Transactions of Materials Processing / v.15, no.6, 2006 , pp. 428-435 More about this Journal
Abstract
IC leadframe needs precision shape for good efficiency. Friction conditions also have a significant impact on blanking deformation. Therefore, studying the friction produced by the tribology between die and materials becomes necessary. In this study, in order to measure mechanical properties and frictions for leadframe materials such as Ni alloys and coppers, tensile test and straight pulling friction test are executed. In particular, the effect of clearance on the blanking characteristics depending on friction coefficient is examined by finite element simulation. From the finite element simulation, the metal flow, side pressure of punch and crack initiation are evaluated according to the leadframe materials.
Keywords
Leadframe; Blanking; Friction Coefficient; Clearance; FE-simulation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 E. K. Suh, S. H. Lim, H. B. Shim, 2001, A Study on the Characteristics of the Precision Blanking of Lead Frame (1): Influences of Blanking Process Variables, J. KSTP, Vol. 10, No. 5, pp. 425-432   과학기술학회마을
2 E. Taupin, J. Breitling, W. T. Wu, T. Altan, 1996, Material fracture and burr formation in blanking results of FEM simulation and comparison with experiments, J. Mat. Proc. Tech., Vol. 59, pp. 68-78   DOI   ScienceOn
3 D. H. Kim, B. M. Kim, Y. Lee, B. H. Min, 2002, Friction characteristics for surface finish and the stoning direction of stamping dies, Proc. Instn. Mech. Engrs., Vol. 216, pp. 531-542   DOI   ScienceOn
4 E. Taupin, J. Breitling, W. T. Wu and T. Altan, 1998, Material fracture and burr formation in blanking results of FEM simulation and comparison with experiments, J. Mat. Proc. Tech., Vol. 59, pp. 68-78
5 D. H. Kim, S. B. Lee, B. M. Kim, 2002, Development of optimal layout design system in multihole blanking process, J. Mat. Proc. Tech., Vol. 130-131, pp. 2-8   DOI   ScienceOn
6 S. K. Cheon, C. H. Han, 1999, A study on the precision improvement of lead frame in blanking process, J. KSPE(Spring Conference), pp. 1027-1030
7 F. Faura, A. Farcia, M. Estrems, 1998, Finite element analysis of optimum clearance in the blanking process, J. Mat. Proc. Tech., Vol. 80-81, pp. 121-125
8 M. Samuel, 1997, FEM simulation and experimental analysis of influence in the blanking process, J. Mat. Proc. Tech., Vol. 84, pp. 97-106
9 T. Jimma, F. Sekine, K. Sekiya, S. I. Shouzui, W. Morimoto, 1987, Research on precision blanking of electronic machine parts, J. JSTP, Vol. 28, pp. 355-362
10 S. H. Lim, E. K. Suh, H. B. Shim, 2001, A study on the characteristics for the blanking of lead frame with the rectangular shape blanking, J. KSPE, Vol. 18, No. 3, pp. 1027-1030
11 E. K. Suh, S. H. Lim, H. B. Shim, 2002, A Study on the Characteristics of the Precision Blanking of Lead Frame (II): Determination of Optimal Process Condition, J. KSTP, Vol.11, No. 2, pp. 132-137
12 J. M. Lanzon, M. J. Cardew-Hall, P. D. Hodgson, 1998, Characterizing frictional behavior in sheet metal forming, J. Mat. Proc. Tech, pp. 251-256
13 D. C. Ko, C. Kim, B. M. Kim, J. C. Choi, 1996, Finite element simulation of sheet metal shearing by the element kill method, J. KSPE, Vol.13, No. 11, pp. 114-123