Browse > Article
http://dx.doi.org/10.5228/KSPP.2005.14.1.057

Process Design of Shaft Considering Effect of Preform and Eccentric Load on Cold Forging Product in Multistage Former of Horizontal Type  

Park S. S. (부산대학교 정밀기계공학과 대학원)
Lee J. M. (부산대학교 정밀기계공학과 대학원)
Kim B. M. (부산대학교 정밀정형 및 금형가공 연구소)
Publication Information
Transactions of Materials Processing / v.14, no.1, 2005 , pp. 57-64 More about this Journal
Abstract
This study deals with the cold forging process design for shaft in the main part of automobile motors with rectangular deep groove. In forging process, the accuracy and die lift is very important because it have influence on reduction of the production cost and the increase of the production rate. Therefore, it is necessary to develop the manufacturing process of shaft by cold forging., process variables are the cropped face angle of billet and the eccentric load of punch. The former is derived from cropping test, the latter is occurred by clearance between container and preform. Also, grooved preform select the process variable for decrease in punch deflection. We investigate that a deflection of punch and a deformation of preform to every process variables. Through this investigation, we suggest the optimal preform and process design, expect to be improved the tool life in forging process.
Keywords
Rectangular Groove; Hobbing; Preform Design; Punch Deflection; Multi-stage Former;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김동진, 김병민, 1999, 이중 리브를 가진 냉간압출품의 내.외부 결함 방지를 위한 공정설계. 한국소성가공학회, 제 8 권 제 6 호, pp. 612-619
2 N. S. Kim, S. Kobayashi, 1990, Preform Design in H-Shaped Cross Sectional Axisymmetric Forging by the Finite Element Method, Int. J. Mech. Manuf, Vol. 30, No. 2, pp. 243-265   DOI   ScienceOn
3 G. C. Wang, G. Q. Zhao, X. H. Huang, Y. X. Jia, 2002, Analysis and design of a new manufacturing process for a support shaft using the finite element method, J. Mater. Process. Technol., Vol. 121, pp. 259-264
4 K. Imai, 1981, Effects of Punch Velocity on the Preciseness of Backward-Extruded Cups, J. JSTP, Vol. 22, No. 241, pp. 185-190
5 J. H. Lee, T. H. Kim, B. M. Kim, 1998, Design Methodology of Preform for Reducing Tool Wear in cold Forging, J. of the Korean Society of Precision Engineering, Vol. 15, No. 4, pp. 118-125
6 M. Shiome, J. H. Xu, K. Mori, K. Osakada, 1996, Three-Dimensional Finite Element Simulation of Buckling Behavior of Slab in Width-sizing Process, Advanced Technology of Plasticity, pp. 355-358
7 T. Kato, Y. Tozawa, K. Nakanishi, T. Kawabe, 1986, Prediction of dimensional Accuracy of Cold Extruded Can During Repeating Operation, Annals of the CIRP, Vol. 35, No. 1, pp. 177-180   DOI   ScienceOn
8 K. Imai, 1975, Effects of Unsteady Deformation on Inner and Outer Diameters of Backward Extruded Cups, J. JSTP, Vol. 16, No. 178, pp. 1065-1072
9 Meisenbach Gmbh and Bamberg, 1992, Cropping of steel bar-its mechanism and practice, International Cold Forging Group
10 I. Pillinger, P. Hartley, C.E.N. Sturgess, G. W. Rowe, 1985, An elastic-plastic three-dimensional finite element analysis of the upsetting of rectangular blocks and experimental comparison, Int. U. Mach. Tool. Des. Res., Vol. 25, p. 229   DOI   ScienceOn
11 Massao Murakawa, 1992, Building a Prototype Cropping Tester of Circular Bars and Several Test Results Obtained, J. JSTP, Vol. 33, No.374
12 Scientific Technologies Corporation, 1995, DEFORM User's Manual V4.1