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http://dx.doi.org/10.5228/KSTP.2010.19.8.447

Die System for Avoiding Thickness Reduction along the Bent Corner in Warm Plate Forging of an Axle Housing  

Kim, J.S. (한국폴리텍7대학 창원캠퍼스 컴퓨터 응용금형과)
Kim, K.S. ((주)지성정밀)
Shim, S.H. (경상대학교 기계공학과 대학원)
Eom, J.G. ((사)경상대 수송기계부품기술혁신센터)
Joun, M.S. (경상대학교 기계항공공학부/항공기술부품기술연구원)
Publication Information
Transactions of Materials Processing / v.19, no.8, 2010 , pp. 447-451 More about this Journal
Abstract
In this paper, a useful die system for warm plate forging of a large axle housing of heavy-duty trucks is presented. A die system composed of material flow guide pin as well as upper die and lower die is proposed to reduce the inherent thickness reduction along the bent corner of the product which deteriorates structural strength and fatigue life in its service. The role of the pin assembled in the upper die is to prevent formation of sharp corner in early forming stage and to supply material in the lower die cavity sufficient enough to thicken the bent corner at the final stroke. The mechanism of the die system is given and its effect on corner thickness of the product is revealed by two-dimensional finite element analysis under plain strain assumption. Three-dimensional finite element solutions are also given to verify validity of the two dimensional approach and to show the mechanics of the die system in detail. The die system has been successfully applied to manufacturing the axle housing of heavy-duty trucks.
Keywords
Die System; Axle Housing; Plate Forging Process; Thickness Reduction; Warming Forming; Finite Element Analysis;
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