Date: 2013-08-20

Methods of improving accuracy of FAG bearings

1, FAG bearings after installation in the host, such as measurement of spindle runout, but found its spin measured value has a certain amount of change; during continuous measurement, can be found after a certain speed after, this change is approximately repeats. Measure of this variability for cyclic running accuracy, changes required to approximate repeats to a few representative cyclic running accuracy of "cycles", measure changes in quasi-periodic amplitude, cyclic running accuracy is poor. If the appropriate preload for spindle, speed gradually increased to close to the speed, to the introduction of FAG bearings "break-in" effect, cycles of spindle running accuracy can be improved.
2, and a factory trial precision instruments, spindle with 6202/P2 type FAG bearing and its precision still cannot meet requirements, Hou plus rough axis neck and in its Shang produced roll road to instead of within ring, and will steel ball for precision measurement, to size size each three grain a group, each group steel ball take close to 120 ° of interval separated, due to reduced has a heavy processing surface, and reduced has a heavy tie surface, while and improve has FAG bearing system of stiffness, and maximum three grain and minimum three grain steel ball of close to raster distribution, Improved axis of rotation accuracy and meet accuracy requirements for the instrument.

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