(
A)
High-end wave dynamic bearing base combining theory research present situation and the analysis of the 20th century ago, the manufacture 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 a significant role in guiding.
In order to meet the high-end machine tool bearing in high speed, high precision, high taste demand can be constancy, etc, with 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.
Rolling bearing dynamics of a person to is divided into four stages: statics model, quasi statics model, dynamic model and dynamic model.
Has no meter for shaft in most of the calculation by using the quasi statics 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 the kinetics of pure injury really 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, is one of the largest bottle up 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 by mistake 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 with 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.
Abroad in the field of aviation, in view of the engine has been developed specially for the spindle bearing high-performance materials, such as the United States M50NiL, CSs421L, Germany Cronidur30, false rose 3 n347 special bearing steel, etc.
Of Gao Tieyong bearing, abroad adopt high purity steel, European bearing ring and steel roller adopts vacuum degassing axis, the bearing sleeve adopted carburizing steel, roller adopts vacuum degassed bearing steel as a kind of new material, ceramic material application in the rolling bearing bearing material xintiandi.
Application of village broke through the traditional steel bearing limit for many applications, such as recommend suite (
DmN value of 3 million)
, long life (
About 3 ~ 5 times of the steel bearing)
, abrasion resistance, insulation, temperature tolerance, and its burn resistance stronger, higher stiffness, can implement high precision machining
