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두께가 얇은 냉간단조품의 스프링백 거동 및 저감설계
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  • 두께가 얇은 냉간단조품의 스프링백 거동 및 저감설계
저자명
김대원,신영철,최호준,윤덕재,이근안,김연구,임성주,Kim. D.W.,Shin. Y.C.,Choi. H.J.,Yoon. D.J.,Lee. G.A.,Kim. Y.G.,Lim. S.J.
간행물명
소성가공
권/호정보
2012년|21권 7호|pp.397-402 (6 pages)
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한국소성가공학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The flange hub is a main component in an automotive steering system. In general, the flange hub are fabricated by mechanical machining, which is a process where material waste is inevitable. It is well-known that a net-shape cold forging cannot only reduce material waste but can also improve the mechanical strength of the final product. Thus, a forging process design was conducted for production of a flange hub. Significant spring-back occurs around the flange due to its small thickness in conjunction with the residual stresses after forging. In order to achieve the required dimensional accuracy, a process design with appropriate spring-back control is needed. In this study, a modification of the forging die was designed based on FE analysis with the purpose of spring-back compensation. Four kinds of different die designs were evaluated and the optimum design has two times less spring-back than the initial design. The compensation angle of the optimum design is 0.5 degrees. The results have been experimentally confirmed by cold forging of a flange hub and comparing the amount of spring-back between the actual component and the FE analysis.