1.
Bearing types of options: bearing model is commonly used by the user's technical personnel according to the product of form a complete set of conditions and the load to select FAG bearings.
Business people mainly learn the user's actual load is consistent with the selected FAG bearing, if bearing can not meet the use requirements, should suggest customer re-election model as soon as possible, but unless special products on the choice models generally do not have what problem.
2.
Bearing clearance choice: user when buying bearings generally just let us know in what type, grade, rarely to FAG bearing clearance request, business people must ask bearing conditions of use, which the bearing rotating speed, temperature and tolerance are directly related to the selection of the bearing clearance.
Generally under 3500 RPM speed motor mostly adopts CM clearance, such as high temperature and high speed motor, require the use of relatively large clearance.
Bearing clearance after assembly will rise because of the inner hole and cylindrical reduction and lead to reduce, the reduction of clearance = interference quantity x 60% (
Except the bearing chamber is aluminum)
。
Such as bearing clearance is zero before assembly.
01 mm, interference when assembling the quantity to zero.
01 mm, bearing assembly after the clearance of 0.
004mm。
In theory at zero clearance noise and bearing life can reach the best state, but in actual operation considering the problems such as temperature, FAG bearing clearance to 0 after assembly.
002mm-
0.
004 mm is better.
3.
Grease selection: the choice of grease are generally according to the requirements of the bearing rotating speed, heat resistance, noise and choose starting torque, etc, for business people to know a lot about the performance of all kinds of grease.
4.
The choice of bearing seal type: FAG bearing lubrication can be divided into oil lubrication and grease lubrication.
Oil lubricated bearing is generally choose form of bearing, grease lubricated bearing dust cover is generally selected or rubber seal seal.
Dust cover suitable for high temperature or the use of good parts, seal two points contact seal and non-contact seal and contact seal dustproof performance is good but the starting torque, the sealing type starting torque is small, but there is no contact sealing performance is good.
Bearing in the automobile, household appliances motor bearing of motor bearing, motorcycle bearing, the health care professional manufacturing, motor bearing industry to make optimal FAG bearing noise and life.
From the perspective of the objective requirements of the machine tool industry, angular contact ball bearing motorized spindle, liquid (
Move)
Hydrostatic bearing motorized spindle and gas bearing motorized spindle is the focus of the market development, is also the academic research hot spot.
Angular contact ball bearing is the most suitable for high speed rolling bearing, small friction resistance, low consumption, low cost, easy to serialization and standardization, its limit rotational speed, high precision, high rigidity, high in processing center, CNC milling machine, lathe, grinder and won a wide application in high speed engraving and milling machine, the main technical difficulties to improve the accuracy and reliability.
Liquid (
Move)
Hydrostatic spindle with liquid oil film as a support, a significant 'error homogenization effect' and damping vibration, the spindle rotation accuracy is much higher than rolling bearing type, its high rigidity, wear small, long life, won the widely used in precision ultra-precision machine tools, the main technical difficulties is to control the high-speed spindle temperature rise and thermal deformation.
Gas FAG bearing motorized spindle with 'film' as a support, rotary accuracy and limit rotational speed is higher than the liquid (
Move)
Static pressure motorized spindle and motorized spindle rolling bearing type, its thermal stability is good, is ultra precision machine tools and printed circuit board (
PCD)
Indispensable core drilling machine parts and its shortcoming in the low bearing capacity, high technical requirements.
Magnetic suspension bearing spindle support is also a kind of important way, high limit speed, no wear in the process of operation, its technical difficulty lies in how to improve the dynamic stiffness and damping vibration reduction performance, in the realization of high speed while maintaining high machining accuracy.
The core content in the research of magnetic suspension spindle is mechanical features and the electromagnetic characteristics of control system.
