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http://dx.doi.org/10.7839/ksfc.2022.19.4.010

Comparative Analysis of Mechanical Vibrations of an Air-Drop Hammer and a Counterblow Hammer in Forging Process  

Kim, S.T. (Department of Mechanical Engineering, Changwon National University)
Choi, Y.H. (Department of Mechanical Engineering, Changwon National University)
Ju, G.J. (Mechanical Engineering Research Center, Changwon National University)
Publication Information
Journal of Drive and Control / v.19, no.4, 2022 , pp. 10-18 More about this Journal
Abstract
Air-drop hammer press and counterblow hammer press are widely used power-drop forging hammersemploying different forging blow mechanisms. It is important and necessary to analyze mechanical vibrations of these two different hammers in their forging processes in order to develop high performance forging hammers. In this study, these two forging hammers were mathematically modelled as mass-spring-damper systems. For these two different types of forging hammers, the forging efficiency and mechanical vibrations due to hammer forging blow were theoretically analyzed and compared. The force transmitted to the ground was also determined and compared. Especially, effects of mass ratio and restitution coefficient on forging efficiency were investigated.
Keywords
Air-Drop Hammer; Counterblow Hammer; Forging Efficiency; Mass Ratio; Momentum Ratio;
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