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RISS 인기검색어
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- 저자 : 김영신(Y.S. Kim) (검색결과 85 건)
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김영신(Y. S. Kim),임재곤(J. G. Lim),전만수(M. S. Joun) 한국소성가공학회 2016 한국소성가공학회 학술대회 논문집 Vol.2016 No.4
In this study, die elastic deformation considered simulation of an aluminum fixed scroll forging process, a kind of forward extrusion process, is conducted, which is very special because of complexity in die geometries. The material is assumed rigid-viscoplastic and the dies are elastically behaved. The predictions are compared in terms of dimensions and forming load with the other predictions obtained without consideration of die elastic deformation during forging. The reasons of die fracture occurring in hot aluminum forging of a fixed scroll are revealed using finite element predictions.
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금형과 소재의 형상이 고정스크롤 열간단조 금형의 파괴에 미치는 영향분석
김영신(Y. S. Kim),정승원(S. W. Jeong),임재곤(J. G. Lim),전만수(M. S. Joun) 한국소성가공학회 2015 한국소성가공학회 학술대회 논문집 Vol.2015 No.10
In this paper, effects of geometric parameters of dies and material on die stress in hot forging of aluminum fixed scrolls are investigated using a finite element simulation technique. The cause of die fracture occurring in hot forging of an aluminum fixed scroll is introduced, emphasizing that the die fracture occurs due to bending stress in tension at the root of the die. Finite element predictions for various titled angles of die and material to induce the metal flow into difficult-to-fill region are considered and they were analyzed to reveal their effects on the die stress near the fracture point. It was shown that optimized material and die parameters can be helpful to prevent premature of unpredicted die fracture in this process.
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