Analysis Of Tribochemical Effects Of Nitrogen-enriched Grinding Of Industrial Robot Ball Bearing Rings

The market demand of industrial robot in China is huge,but 70% still depends on the import.The main performance is that the speed reducer,controller and driver do not pass through the quality,and the reducer does not pass through.The main reason is that the key basic parts,bearing design and manufacture foundation research is backward,the bearing is a kind of unusually important basic spare parts,and known as the machine.The performance of mechanical equipment is directly affected by the performance of the mechanical equipment.With the implementation of the 2025 manufacturing plan in China,the requirements for automation and intellectualization of industrial robots are constantly improved,and new challenges are put forward to the accuracy,reliability,service life and performance of the bearings.In this paper,based on a high performance machining technology for reinforced lapping of metal materials,The main research is as follows:In this paper,the test of the bearing ring is carried out under different injection pressure,and the metallographic sample is prepared.The thickness of the surface strengthening layer of the bearing ring is measured before and after the processing,and the surface micromorphology under the different injection pressure is analyzed.The optimum injection pressure is 0.5MPa.The abrasive liquid containing boron,phosphorus,sulfur and chlorine extreme pressure additives was respectively carried out under the optimal injection pressure of0.5MPa and under the GCr15 bearing steel plate and bearing ring respectively.The friction and wear test of the bearing plate samples was carried out.The results show that the sulfur system has the best effect of extreme pressure additives and the friction coefficient is the most.It can be as small as 0.367,and the wear amount is 3.3mg.At last,the samples of bearing rings with better friction and wear properties were selected.The surface chemical components of the bearing rings were observed by X ray spectrometer(EDS)and X ray diffractometer(XRD).After the EDS detection,the content of Fe and Na elements on the bearing surface decreased obviously after enhanced grinding,and C,O,N,S,Ca and other Yuan Suming were found.It ispossible to speculate that in the process of intensified grinding,a series of frictional chemical reactions such as C,O,S,N,and other elements of Fe,Na and so on at high temperature have been formed in the process of intensified grinding.Through XRD comparison,it is found that after the processing of bearing rings,besides Fe,C and Cr,there are also maybe have FeS metal complexes.This complex is a solid lubricating film,which can play a good role in anti-wear and antifriction,and also verifies the previous conjecture.