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.
초록· 키워드
오류제보하기
Press machines and dies are commonly used for 3D curved sheet forming. Using conventional die forming can cause economic problems since various modifications of the die shape are required depending on the product shape. Various types of flexible forming such as multi-point dieless forming (MDF), flexible incremental roll forming have been developed to improve the needed process flexibility. Although MDF can reduce the production cost using reconfigurable dies, it still has significant material loss. Drawbacks such as wrinkling, dimpling, and forming errors can also occur despite continuous investigations to mitigate these defects. A novel sheet forming process for 3D curved surfaces, a flexibly-reconfigurable roll forming (FRRF), has been recently proposed to overcome the economic and technical limitations of current practice. FRRF has no limitation on blank size in the longitudinal direction, and also minimizes or eliminates forming defects such as wrinkling and dimpling. Feasibility studies of FRRF have been conducted using FE simulations for multi-curved shapes and various sheet thicknesses. Therefore, the fabrication of a FRRF apparatus is required for any follow-up studies. In the current study, experiments with reconfigurable rollers were conducted using a simple design pre-FRRF apparatus prior to fabricating the full size FRRF apparatus. There are three candidates for the reconfigurable roller: a bar-type shaft, a flexible shaft, a ground flexible shaft. Among these candidates, the suitable reconfigurable roller for FRRF is determined through various forming tests.
목차
Abstract
1. 서론
2. 비정형롤판재성형 공정
3. Pre-FRRF 장비
4. 실험결과
5. 결론
REFERENCES
참고문헌 (16)
참고문헌 신청
J. Y. Hwang, S. M. Choi, S. H. Jeong, 2003, Strategies for Building up Capabilities in the Korean Aircraft Sub-system Industry, J. Kor. Technol. Innovation Soc., Special Volume, pp. 551~568.
N. Nakajima, 1969, A Newly Developed Technique to Fabricate Complicated Dies and Electrodes with Wires, Bull. Jpn. Soc. Manuf. Eng., Vol. 12, No. 54, pp. 1546~1554.
Q. Zhang, T. A. Dean, Z. R. Wang, 2006, Numerical Simulation of Deformation in Multi-point Sandwich Forming, Int. J. Mach. Tool. Manuf., Vol. 46, Issues 7- 8, pp. 699~707.
Q. Zhang, Z. R. Wang, T. A. Dean, 2007, Multi-point Sandwich Forming of a Spherical Sector with Tool- Shape Compensation, J. Mater. Process. Technol., Vol. 194, No. 1, pp. 74~80.
S. J. Yoon, D. Y. Yang, 2005, An Incremental Roll Forming Process for Manufacturing Doubly Curved Sheets Forming General Quadrilateral Sheet Blanks with Enhanced Process, CIRP. Ann-Manuf. Technol., Vol. 54, Issue 1, pp. 221~224.
N. Nakajima, 1969, A Newly Developed Technique to Fabricate Complicated Dies and Electrodes with Wires, Bull. Jpn. Soc. Manuf. Eng., Vol. 12, No. 54, pp. 1546~1554.
Q. Zhang, T. A. Dean, Z. R. Wang, 2006, Numerical Simulation of Deformation in Multi-point Sandwich Forming, Int. J. Mach. Tool. Manuf., Vol. 46, Issues 7- 8, pp. 699~707.
Q. Zhang, Z. R. Wang, T. A. Dean, 2007, Multi-point Sandwich Forming of a Spherical Sector with Tool- Shape Compensation, J. Mater. Process. Technol., Vol. 194, No. 1, pp. 74~80.
S. J. Yoon, D. Y. Yang, 2005, An Incremental Roll Forming Process for Manufacturing Doubly Curved Sheets Forming General Quadrilateral Sheet Blanks with Enhanced Process, CIRP. Ann-Manuf. Technol., Vol. 54, Issue 1, pp. 221~224.
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UCI(KEPA) : I410-ECN-0101-2016-551-002392740