지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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The aspect ratio of a hole is defined as the ratio of the thickness to the diameter of the sheet metal. Most holes in the sheet metal industry are made by piercing. However, for thick sheets, which have an aspect ratio greater than 2, a machining process like drilling instead of piercing is usually used to make holes. In the current study, piercing, which is a shearing process, is evaluated to punch a hole with a high aspect ratio by using a newly designed die set-up. The piercing die was manufactured to prevent the punch from buckling and also to improve the alignment between the die components. An aluminum alloy sheet was selected for the experiments. The influence of several process parameters such as sheet thickness, clearance and stripping force were investigated. Experimentally, a hole with an aspect ratio of 5 was pierced. The resulting hole had a clean surface and the dimensional accuracy of pierced hole was considerably improved with decreasing clearance between punch and die. It is also shown that the larger penetration depth of the effective sheared surface can be achieved for high aspect ratio piercing relative to conventional piercing with a low aspect ratio.
목차
Abstract
1. 서론
2. 실험
3. 결론
REFERENCES
참고문헌 (8)
참고문헌 신청
1. [단행본] - W. S. Kim / 1996 / Press Working Technology / Korea Industrial Information Center : 132 ~ 144
2. [학술지(정기간행물)] - Y. U. Kim / 1999 / Local Buckling Analysis of the Punch in Stamping Die and Its Design Modification / J. KSPE 16 (3) : 25 ~ 29
3. [학술지(정기간행물)] - J. U. Han / 1996 / An Experimental Study on Micro Drilling Using Step Feed / J. KSPE 13 (2) : 46 ~ 53
4. [학술지(정기간행물)] - M. Sasada / 2006 / Study on Piercing Mechanism of Small Holes / J. Mater. Process. Technol. 177 (1) : 649 ~ 652
5. [학술지(정기간행물)] - 유준환 / 2003 / 금속 소재의 미세 홀 펀칭 시 전단 파괴 거동 연구 / 소성가공 12 (4) : 314 ~ 319
2. [학술지(정기간행물)] - Y. U. Kim / 1999 / Local Buckling Analysis of the Punch in Stamping Die and Its Design Modification / J. KSPE 16 (3) : 25 ~ 29
3. [학술지(정기간행물)] - J. U. Han / 1996 / An Experimental Study on Micro Drilling Using Step Feed / J. KSPE 13 (2) : 46 ~ 53
4. [학술지(정기간행물)] - M. Sasada / 2006 / Study on Piercing Mechanism of Small Holes / J. Mater. Process. Technol. 177 (1) : 649 ~ 652
5. [학술지(정기간행물)] - 유준환 / 2003 / 금속 소재의 미세 홀 펀칭 시 전단 파괴 거동 연구 / 소성가공 12 (4) : 314 ~ 319
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UCI(KEPA) : I410-ECN-0101-2015-550-001374718