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Conical roll-twist-bending process for fabrication of metallic Archimedes spiral blade used in small wind power generator

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Abstract

We propose a novel conical roll-twist-bending (RTB) process to fabricate a metallic Archimedes spiral blade which has variable curvatures on its surface, and it is a key element of a novel wind power generator having a remarkably higher efficiency of about 34% compared with conventional wind power systems. The RTB system consists of a pair of conical rollers (upper and lower sides) and cylindrical twist-bending rollers in the both lateral sides. With the help of forming analysis results, multi-step regional forming method was utilized to fabricate the blade. Also, the process parameters were optimized by a response surface methodology. In this work, we installed the experimental equipment of RTB process, and it was experimentally proven that the developed RTB process was capable of producing a spiral blade with a shape error less than approximately 5%. Furthermore, we believe that the RTB process can be utilized to fabricate diverse sheet metal structures having continuously changing curvatures for various applications.

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Authors and Affiliations

  1. School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, South Korea

    Sung-Moon Yang

  2. School of Mechanical Engineering, MEMS Technology Centre, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, South Korea

    Ho-Seong Ji

  3. Division of Mechanical Engineering-Major of Marine Equipment, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan, 49112, South Korea

    Do-Sik Shim

  4. Department of Engineering Research, ESCO RTS Co., Ltd., 428, Hanshin S-Meca, 65, Techno 3-ro, Yuseong-gu, Daejeon, 34016, South Korea

    Joon-Ho Baek

  5. School of Mechanical Engineering and ERC/NSDM, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, South Korea

    Sang-Hu Park

Authors
  1. Sung-Moon Yang
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  2. Ho-Seong Ji
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  3. Do-Sik Shim
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  4. Joon-Ho Baek
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  5. Sang-Hu Park
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Correspondence to Sang-Hu Park.

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Yang, SM., Ji, HS., Shim, DS. et al. Conical roll-twist-bending process for fabrication of metallic Archimedes spiral blade used in small wind power generator. Int. J. of Precis. Eng. and Manuf.-Green Tech. 4, 431–439 (2017). https://doi.org/10.1007/s40684-017-0048-4

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  • DOI: https://doi.org/10.1007/s40684-017-0048-4

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