|제목(국문)||액슬하우징의 온간 후판단조에서 굽힘 변형된 모서리에서 발생하는 두께 감소 방지를 위하여 고안된 금형 시스템|
|제목(영문)||Die System for Avoiding Thickness Reduction along the Bent Corner in Warm Plate Forging of an Axle Housing|
(J. S. Kim
,한국폴리텍7대학 창원캠퍼스 컴퓨터 응용금형과
김기수 (K, S. Kim ,(주)지성정밀 ) ▷공저자네트워크등록하기
심상현 (S. H. Shim ,경상대학교 기계공학과 대학원 ) ▷공저자네트워크등록하기
In this paper, a useful die system for wann 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 fonning 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 ofheavy-duty trucks.
|keyword||Die System, Axle Housing, Plate Forging Process, Thickness Reduction, Wanning Fonning, Finite Element