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논문 기본 정보

자료유형
학술저널
저자정보
김홍석 (Daegu University) 윤재웅 (Daegu University)
저널정보
한국소성·가공학회 소성·가공 소성가공 제21권 제8호
발행연도
2012.12
수록면
493 - 498 (6page)

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A wheel nut wrench is one of the hand tools used to loosen and tighten lug nuts on automobile wheels and it has generally a solid-type geometry for commercial vehicles. However, the solid-type wheel nut wrenches manufactured by hot forging processes exhibit several drawbacks such as heavy weight and rough surface finish. Thus, many efforts have been devoted to change the part geometry and improve the manufacturing process. For this purpose, the weight of the final product can be reduced drastically using a hollow tube as the initial stock, which can be manufactured by the more economical manufacturing process of cold forging. In this study, the cold forging of a hollow-type wheel nut wrench for commercial vehicles was designed based on the results of fundamental experiments and CAE analyses using the commercial finite element code DEFORM-3D. In addition, cold forging experiments were conducted on a special-purpose forming machine for hollow wheel nut wrenches in order to validate the designed process sequence. As results, it was found that the final products with a weight reduction of 39% and better surface appearance can be manufactured without any defect with the newly designed cold forging process.

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Abstract
1. 서론
2. 제품 형상 및 공정흐름 검토
3. 냉간단조 공정설계 및 CAE 해석
4. 냉간단조 성형실험
5. 결론
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UCI(KEPA) : I410-ECN-0101-2014-551-000225968