Abstract
A stamping process is widely used for fabricating various sheet metal parts for vehicles, airplanes, and electronic devices by the merit of low processing cost and high productivity. Recently, the use of thin sheets with a corrugated structure for sheet metal parts has rapidly increased for use in energy management devices, such as heat exchangers, separators in fuel cells, and many others. However, it is not easy to make thin corrugated structures directly using a single-step stamping process due to their geometrical complexity and very thin thickness. To solve this problem, a multi-step stamping (MSS) process that includes a heat treatment process to improve formability is proposed in this work: the sequential process is the initial stamping, heat treatment, and final shaping. By the proposed method, we achieved successful results in fabricating thin corrugated structures with an average thickness of 75 μm and increased formability of about 31% compared to the single-step stamping process. Such structures can be used in a plate-type heat exchanger requiring low weight and a compact shape.
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Recommended by Associate Editor Youngseog Lee
Sung-Woo Choi is an engineer with Advanced Development Team in Refrigerator R&D Lab, LG Electronics. He has a bachelor’s degree from Dong-A University and a master’s from Pusan National University in 2011. Present research field is the new structural design of a refrigerator.
Sang-Hu Park is a professor in the School of Mechanical Engineering, Pusan National University. His research fields are nano/microfabrication, sheet metal forming, and optimal structure design. He is a member of KSME, KSPE, and KPEA. Also, he is a professor in PNU-Rolls Royce University Technology Centre, and is in charge of manufacturing technology.
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Choi, SW., Park, S.H., Jeong, HS. et al. Improvement of formability for fabricating thin continuously corrugated structures in sheet metal forming process. J Mech Sci Technol 26, 2397–2403 (2012). https://doi.org/10.1007/s12206-012-0616-z
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DOI: https://doi.org/10.1007/s12206-012-0616-z