Abstract:By using pindisk type friction pairs,under normal temperature,atmospheric pressure and fluid lubrication,the friction experiment of difference density of microdimple ellipse surface friction pattern was carried out.On different contact pressure and sliding velocity,the impact of density of microdimple ellipse pattern under the different direction of friction on friction property was researched.By using the Stribeck curves under the different test conditions, the friction property of different density of the dimple pattern was analyzed.The results show that the effect of reducing friction of microdimple ellipse pattern under different load is increased with the increasing of velocity,and which has significant difference on different sliding direction,but this difference will reduce with the raising of density of the pattern.Alone with the raising of density,the friction coefficient is decreased,the reason of which is that the increasing of density is more easier to make the friction state changes from the critical lubrication to hydrodynamic lubrication state.