On The Surface Of Micro Deep Hole Of High Antifriction Effect Research Deputy Contact Parts

With the emergency of more and more high-speed and heavy-load transmission mechanism and the more and more extreme working conditions of components, the service life of the components are shorter and shorter. Therefore, how to improve the service life of the components has become an crucial problem in modern engineering. In addition, in today’s society themed by energy saving and emission reduction, the improvement of the service life of components plays an significant role in the sustainable development of global economy. To improve the service life of components, reducing wear of the contact surface of components is one of the most effective methods. At present, the common methods of improving the wear-resisting performance of components surface are mainly as follows:change the chemical composition and organization structure of the materials, change the surface modification technology of heat treatment process and materials, etc. Here, the paper puts forward a method to improve the wear resistance of components—making many ordinal micro deep hole in the surface of components. Because under heavy load of the surface of components, the contact surface will be deformed, making the volume of micro deep holes in the contact surface district decrease, which produces the phenomenon of oil to be crowded, thus increases the thickness of the oil film in the contact surface district, and eventually reaches the effect of antifriction.This paper mainly introduces the method of making micro deep holes in the surface of components using the technology of laser processing, and expounds the factors influencing micro deep holes processing during the process of laser processing, which processes many ordinal micro deep holes with the diameter of0.2～0.4millimeter and the depth of1.5-2.0millimeter applying HGL-LCY300laser processing equipment in the surface of cylindrical roller. Based on the theory of the classic elastohydrodynamic lubrication, the paper deduces the equations set of elastohydrodynamic lubrication when the surface of components have micro deep holes and analyzes numbers of the equations set using the numerical analysis method. The paper makes a conclusion that the thickness of oil film in the contact districts can be increased and the pressure of oil film in the contact districts can be decreased when the surface of components have micro deep holes through comparing the calculated results and the numerical results working out under the same condition of the smooth surface of components. The paper also analyzes the influence of the change of the node number, load, speed and the flows of micro deep holes on the pressure and thickness of oil film, and draw the conclusions that as follows:(1) the division of the number of nodes in the calculation area somewhat influences the numerical results:the more the number of nodes has, the less the maximum pressure of elastohydrodynamic lubrication oil film decreases, and the more the minimum thickness of oil film increases, but numbers change a few and numerical results are attained more and more slowly.(2) under the same conditions, with the increase of the load, the oil film’s maximum pressure and minimum thickness are increasing, but the smallest oil film thickness of micro deep holes in components surface is larger than that in smooth surface, and the maximal pressure of film is relatively small.(3) under the same conditions, the constant increase of the speed of the fluid doesn’t has an obvious influence on the maximum oil film pressure, but with the increase of the speed, the minimal oil film thickness changes remarkably.(4) the flow of the micro deep hole changes, and the minimum oil film thickness changes a few which change more obviously than that of the oil film thickness of components in smooth surface, while the maximal oil film constantly decreases, and a reasonable range of the overall flow of the micro deep hole is given.The paper also introduces the contrast experiment design of antifriction and lubrication, and in a limited experimental condition the contrast experiment design of the wear resistance of components is made, and the good wear resistance when components surface has the deep hole is further verified which the service life of the parts is improved.