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http://dx.doi.org/10.3795/KSME-A.2010.34.4.423

Analysis of Filling and Stresses in the Hot Forging Process Depending on Flange Die Shapes  

Kim, Jun-Hyoung (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
Kim, Cheol (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.4, 2010 , pp. 423-430 More about this Journal
Abstract
Hot closed-forging process and the die used for forming an automotive flange were analyzed from the viewpoints of heat transfer, grain-flow lines, and stresses to obtain a forged product without defects such as surface cracks, laps, cold shots, and partial filling. The forging process including up-set, pre-forging, final forging and pressing forces was investigated using finite element analysis. The influence of the preform die and the ratio of the heights of the upper die to lower die on the forging process and die were investigated and a die shape ($10^{\circ}$ for the preform die, and 1.5:1 ratio for the final die) suitable to achieve successful forging was determined on the basis of a parametric study. All parametric design requirements such as strength, full filling, and a load limit of 13,000 KN were satisfied for this newly developed flange die. New dies and flanges were fabricated and investigated. Defects such as partial filling and surface cracks were not observed.
Keywords
Forging Die; Preform; Metal Flow; Heat Transfer;
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Times Cited By KSCI : 4  (Citation Analysis)
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