Precision high-speed angular contact ball bearing mounting a
The selection of high-speed angular contact ball bearings for machine tools is critical, which directly affects the life and performance of machine equipment or spindles
Precision bearings are assembled with the same care as the installation. Pay attention not to damage the bearing and various parts, especially the assembly of interference fit bearings, which is difficult to operate. Therefore, the design stage should be considered in advance to facilitate assembly, and it is also very important to design and make assembly tools as needed. When assembling, study the assembly method and sequence according to the drawings, and investigate the matching conditions of precision bearings to obtain foolproof assembly operations.
First, the push method: use the press to push the bearing, the work is stable and reliable, and the machine room is shielded without damaging the machine and the bearing. Presses are available as manual pushing, mechanical or hydraulic presses. Attention: The focus point of the press should be on the center of the shaft and should not be deflected.
Second, the percussion method: the percussion force is generally added to the bearing inner ring, the percussion force of the shielding machine room should not be added to the rolling element and cage of the bearing, this method is simple and easy, but easily damage the bearing, when the bearing is located at the end of the shaft, with a copper rod or other soft metal material smaller than the inner diameter of the bearing against the shaft end, the lower part of the bearing with a gasket, with a hand hammer gently tapped, can be removed. The application of this method should pay attention to the appropriate position of the pad block, and the focus point should be correct.
Third, the pull-out method: using a special pulling tool, when assembling, as long as the handle is rotated, the XEZ precision bearing will be slowly pulled out. When assembling the outer ring of the bearing, the bending angle of the pull tool should be opened outward; When assembling the bearing inner ring, the pull tool bend angle should be inward and snap on the end face of the bearing inner ring. Attention: 1 The hook of the pull tool should be hooked to the inner ring of the precision bearing, rather than to the outer ring, so as to avoid excessive loosening or damage to the bearing; 2 When using the puller, the screw should be aligned with the center hole of the shaft and must not be skewed. You should also pay attention to the force of the hook and the bearing, and do not damage the hook and the bearing; 3. Pay attention to preventing the hook from slipping; 4. The angle of the two feet of the pull is less than 90.
Fourth, hot dismantling method: used to assemble precision bearings with interference fit. First, the oil heated to about 100 °C is poured on the bearing to be disassembled with an oil can, and after the bearing ring is heated and expanded, the bearing can be pulled out with a pull tool.
