1. To match the precision bearing parts requirements

Because the accuracy of precision FAG bearing itself in less than 1 μ m, therefore, ask and match the parts (shaft, housing, cover, block circle, etc) has a high precision and shape accuracy, especially with accuracy to control in the face with the rolling bearing the same level, it is extremely important, and also the most overlooked.

Must also pay attention to the precision bearing part if not reach the match the above requirements and often makes the precision bearings after install than the bearing error occurred tarsus times, even 10 times more error, completely not make precision bearing, the reason is match the error of the part is often not simply adding to the rolling bearing on the error, but with different multiples added up.

2. Precision bearing support

In order to guarantee bearing after installation does not produce in big deformation, you must do the:

(1) axis and a hole and block the roundness shoulder vertical degree according to the corresponding precision requirements to bearing.

(2) both precise rotation of the rings with surplus quantity, but also to the accurate calculation of the collar with appropriate amount fixed.
Rotating contractor over surplus quantity of burning in possible range has also advised small. As long as really ensure the operating temperature influence of thermal expansion, and under the influence of the highest speed centrifugal force, not only caused a tight fit motion of the surface or sliding. Fixed according to the work load size and collar bearing size, the selection of the tiny clearance fit or with interference, too loose or too tight, has not kept the original accurate shape.

(3) the rolling bearing such as high speed conditions in operation, and the work of higher temperature, should pay special attention to rotate the collar with not too loose, in order to prevent the eccentric vibration, and fixed the collar with do not appear clearance, in order to prevent the front-runners in load stimulate and deformation vibration.

(4) of the fixed circle take minor offences surplus with condition is suitable surface, both sides are high precision and the roughness of the smaller shape, cause otherwise in installation and remove more difficult, in addition, also need to consider the influence of the main shaft hot elongation.

(5) in use double Angle contact ball bearing spindle, mostly load is lighter, with its over surplus quantity such as too large, the internal axial preloaded volume will significantly too large, cause adverse effect. Use double row short cylindrical roller bearing spindle and tapered roller bearing spindle, the load is opposite bigger, so its interference with the relatively large also.

3. Improve the accuracy of the method with the actual

In order to improve the rolling bearing installed actual cooperate with precision, we must not make use of the deformation of the bearing measuring method and measuring tools, the inside of the hole to FAG bearing and the round with the actual surface dimension precision measurement, can be in the inner and outer measurement project all be measured, and the data obtained in a comprehensive analysis, counted on, precision with a hole for shaft and the bearing installed parts of the size. In the actual measurements made with the axis of a hole the size and the corresponding geometric shape, should be in and measurement FAG the same bearing temperature conditions.

To ensure a higher with the actual effect, the axis and a hole and bearing the surface of the match, the roughness should as far as possible to small.

In the foregoing measurement, should be in a circular and bearing in the hole, and axle and a hole corresponding surface, in close to the assembly on both sides of the Angle pouring, respectively, and the biggest deviation can make the direction of the two groups of mark, so that in the actual assembly, make the biggest match two party on the same position deviation, so that in the assembly, the parties may partly offset by the deviation.

Make two groups of directional signs purpose, lies in the comprehensive consideration of the deviation compensation can, since the ends of their respective rotation precision support to improve, and between the two supporting a hole and ends the coaxial tolerance of shaft neck get partial to eliminate the error. With the surface of surface strengthening measures, such as sandblasting processing, with slightly larger diameter precision plug column in a plug in the hole, cooperate to improve accuracy.




Other News:
The high precision density of rolling bearing FAG method of installation
FAG before nstall high temperature bearing the preparing work
SKF non-standard bearings installation quality of basic requirements
INA spindle bearing installed to prevent deformation when combined the matters n
Low noise INA set-contained bearing installation and adjustment of the ball matt
IKO rolling bearing installed sep key steps detailed instructions
Sheet of paper Lord roller support of bearings technical
Steel raw material market stability weak at entrance mine fell