Grinding Reduction Design For Electrolytic Machining Bearings Based On The Double Fractal Layering Theory Design Study

Surface machining technology is an important process step to strengthen the performance of the part,for how to improve the wear resistance of the part by changing the surface shape without changing the structure of the base material has been a hot topic of research in tribology.Compared to conventional machining such as heat treatment,grinding and milling,electrolytic machining is one of the most important methods to investigate the above-mentioned hotspots,as it is not limited by the mechanical properties of the workpiece such as strength,good surface quality and no heat-affected zone.In this paper,the surface of specimens under different electrolytic processing parameters is taken as the object of study,and the change law of surface morphology under different electrolytic processing parameters is investigated based on the double fractal layered surface theory.The friction performance parameters of oil film load capacity and oil film thickness on the surface of specimens with different sizes of elliptical weave based on the Reynolds mean equation were simulated and friction wear tests based on electrolytic test results were carried out to investigate the changes in wear resistance and the analysis of the wear mechanism of the surface weave.The details are as follows:In order to investigate the variation of the surface profile with different electrolytic parameters,the bifractal delamination parameters of the surface profile after electrolytic processing were calculated using the bifractal truncation separation structure function method.The calculation of the characteristic parameters revealed that the electrolysis time at which the upper and lower layers of the surface profile are machined to their optimum state does not coincide.The optimum surface condition occurs when the fractal dimension of the upper layer first becomes large when the upper layer is first smooth.It has also been found that as the electrolytic process progresses,the surface condition goes through alternating states of good-poor-good.In order to investigate the effect of surface topography on lubrication after electrolytic processing,surface roughness information and elliptical weave are brought into the numerical calculation of the Reynolds Mean Equation.The results show that the size of the weave influences the distribution of the lubricant film thickness and the load carrying capacity during the lubrication process,and the simulation results show that the larger or smaller the weave size the better the lubrication performance.The simulation results show that the larger or smaller the weave size,the better the lubrication performance.In order to verify that the electrolytic process improves the resistance of the upper layer to deformation and the oil storage capacity of the lower layer,frictional wear tests were carried out under dry friction and lack of oil lubrication conditions.The wear mechanism of the electrolytic elliptical weave was also analysed and found to have three effects: enhancing surface stiffness,improving oil storage and facilitating the formation of dynamic pressure lubrication.