Four kind of lubricants with different viscosity were applied to the tube spinning process. A theoretical analysis based on the two dimensional isothermal Reynolds equation was developed for the hydrodynamic lubrication. Experimental was done on a lathe machine where the metal spinning was done. The results show that linear velocity of the forming tool and rotational velocity of the mandrel both influence the establishment of a hydrodynamic lubricant film thickness at the inlet zone. Formation of a hydrodynamic lubricant film thickness at the inside of the tube is ruled by the eccentricity of the mandrel and tube. Theoretical and experimental estimate the values film thickness. The comparison illustrates that they are related on lubricant viscosity, but not for spray lubricant type. 

MITC2015-pp 181-182