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Hot Forging Analysis of Rotor Grip with Titanium Alloy for Unmanned Helicopter  

Lee, Seong-Chul (동의대학교 대학원 기계공학과)
Kong, Jae-Hyun (동의대학교 대학원 기계공학과)
Hur, Kwan-Do (동의대학교 기계공학과)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.10, no.2, 2011 , pp. 96-103 More about this Journal
Abstract
Rotor grip is used as a component of rotor system in unmanned helicopter. Instead of usual machining, hot forging process has been considered to improve its proof stress against repeated loading conditions and crash in the farm-field. Die design and forming analysis have been performed according to the conditions such as billet volume, flash, cavity filling, and the distribution of damage during the forming by using FE analysis. In the results of analysis, the possibility of structural failure in the model has not been found because its maximum effective stress is much lower than yield strength of the titanium alloy. In the forging die design, flash has been allowed because of low production in the industrial field. Preform design was studied by using FE-analysis, and its optimal dimension was obtained in the hot forging of rotor grip with titanium alloy.
Keywords
Rotor Grip; Unmanned Helicopter; FE-analysis; Preform Design; Hot Forging;
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