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http://dx.doi.org/10.3795/KSME-A.2015.39.7.721

A Door Frame for Wind Turbine Towers Using Open-Die Forging and Ring-Rolling Method  

Kwon, Yong Chul (Shipbuilding & Marine Energy Center, GyeongNam Technopark)
Kang, Jong Hun (Jungwon Univ.)
Kim, Sang Sik (Gyeongsang Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.39, no.7, 2015 , pp. 721-727 More about this Journal
Abstract
The mechanical components for wind turbines are mainly manufactured using open-die forging. This research introduces an advanced forging method to produce the door frame of the tubular wind turbine tower. The advantages of this new forging method are an increase in the raw material utilization ratio and a reduction in energy cost. In the conventional method, the door frame is hot forged with a hydraulic press and amounts of material are machined out because of the shape difference between the forged and final machine products. The proposed forging method is composed of hot forging and ring rolling processes to increase the material utilization ratio. The effectiveness of this new forging method is deeply related to the ring rolled blank dimension before the final forging. To get the optimal ring rolled blank, forged shape prediction using the finite element analysis method was applied. The forged dimensions produced by the new forging method were verified through the first article production.
Keywords
Door Frame; Open Die Forging; Forging Method; Wind Turbine Tower; Finite Element Analysis; Cost Saving;
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