High-end bearing basic theory research present situation and the analysis

High-end bearing basic theory) and analysis of the current research High-end research status of the basic theory of rolling bearing and analysis before the 20th century, the manufacturing technology of rolling bearing relies mainly on the experience, there are few practical theory instruction, theoretical analysis method of rolling bearing in the middle of the 20th century got rapid development, the development of the theory of design and manufacture of rolling bearings have important guiding role. In order to meet the high-end machine tool bearing in high speed, high precision, high reliability and so on special demand, around high-end machine tool bearing the basis of the research work includes: ( 1) Dynamic analysis of the technology of rolling bearing dynamics analysis research relations between the movement and load bearing parts. The kinetics of rolling bearing great cause is divided into four stages: statics model, quasi statics model, dynamic model and dynamic model. Currently the most used in the calculation of bearing design quasi static model and dynamic model. Compared with other rolling bearing analysis model of dynamic model in theory to be more perfect, but due to its complexity, less dynamics method in actual application. But in recent years, with the development of the computing machine technology, based on pure dynamics simulation calculation method have been applied in companies such as SKF. ( 2) Bearing materials and their heat treatment technology in the field of high-end bearing, bearing industry in our country has not get rid of the foreign monopoly, one of the biggest bottleneck is bearing raw materials, domestic bearing steel has made remarkable progress, formed a system of basic material, but with foreign advanced level, the non-metallic inclusions in steel purity, fine dispersion uniformity, carbide, etc, there are still obvious gap, which is confirmed the bearing conditions of the basic principals of long life and high reliability. Special type bearing steel, in particular, the performance of the material error band and foreign product still has certain gap. For special bearing and in the field of high-end products, more than 90% of foreign companies is to build special steel, achieved good effect in practical application. NSK through studying steel long life technology, developed a long life, high performance of the spindle bearing materials: heat-resistant steel SHX. SHX steel even under the condition of inadequate lubrication, also has the very good bit sticky resistance, abrasion resistance and long life. In aviation, abroad for high-performance materials has been developed specially for the engine main shaft bearing, M50NiL, CSS - such as the United States Cronidur30 42 l, Germany, Russia's 3347 special bearing steel, etc. For Gao Tieyong bearing, adopt high purity steel abroad, European bearing ring and roller adopt vacuum degassed bearing steel, Japan