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http://dx.doi.org/10.3795/KSME-A.2016.40.2.221

Study on Manufacturing Process of Hollow Main Shaft by Open Die Forging  

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.40, no.2, 2016 , pp. 221-227 More about this Journal
Abstract
The main shaft is one of the key components connecting the rotor hub and gear box of a wind power generator. Typically, main shafts are manufactured by open die forging method. However, the main shaft for large MW class wind generators is designed to be hollow in order to reduce the weight. Additionally, the main shafts are manufactured by a casting process. This study aims to develop a manufacturing process for hollow main shafts by the open die forging method. The design of a forging process for a solid main shaft and hollow shaft was prepared by an open die forging process design scheme. Finite element analyses were performed to obtain the flow stress by a hot compression test at different temperature and strain rates. The control parameters of each forging process, such as temperature and effective strain, were obtained and compared to predict the suitability of the hollow main shaft forging process. Finally, high productivity reflecting material utilization ratio, internal quality, shape, and dimension was verified by the prototypes manufactured by the proposed forging process for hollow main shafts.
Keywords
Hollow Main Shaft; Open Die Forging; Flow Stress; Wind Power Generator; Finite Element Analysis;
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Times Cited By KSCI : 1  (Citation Analysis)
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