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최원식(Won-Sik Choi),남중희(Jung-Hee Nam),이영선(Young-Seon Lee),이인(Ihn Lee),문희준(Hee-Jun Hun),권주리(Ju-Ry Kwon) 한국산업응용학회 2009 한국산업응용학회 학술대회 논문집 Vol.- No.2
In this study we have tested friction coefficient of the materials which is used in helical gera forging depending on the lubrication. We have used three kinds of oils which are different kinematic viscosity as L-1, L-2 and L-3. The friction of L-2 with lower kinematic viscosity is higher values than others. L-1 and L-2 are fluid lubrication in stribeck curve on the other hand L-2 is boundary lubrication.