• 대한기계학회논문집
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• 제13권5호
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• pp.886-900
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• 1989

본 연구에서는 블랭크홀더력이 디프드로잉 성형성성에 미치는 영향에 대해 알아보고자 윤활조건에 따라 블랭크홀더력의 적정 범위를 이론적으로 파악해 보고, 실험의 경우 고강성 스프링형 블랭크홀더 방식에서 나타나는 디프드로잉 특성 및 초기블랭크홀더력의 성한한계에 관하여 검토하는 것으로 하였다.

• 오토저널
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• 제11권4호
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• pp.35-42
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• 1989

The major purpose of this paper is a study on the effect of die profile radius on the formability of spring-type blankholder system in deep drawing process. By drawing the various materials, formability is studied by means of checking the drawing force, blankholding force variation, limiting drawing ratio and wall wrinkling phenomenon. As the die profile radius increases, the maximum drawing force and maximum blankholding force decrease regardless of lubrication condition. Because better lubrication induces blankholding force to rise, spring type blankholder system is better to protect flange wrinkling phenomenon than constant pressure type. And wall wrinkling phenomenon was not detected in experimental die radius range, so the Miyakawa's upper wrinkling limit is understimated in case of material tested.