When
inspecting the thrust ball bearings that are removed during the regular
maintenance and operation of the spindle bearing equipment and the
replacement of peripheral parts, it is necessary to determine whether
the secondary bearing parts are reusable or not and to record the
conditions of use better than bad. Carefully investigate the oil-free bearing bushing and record the disassembled bearings and appearance. In order to get bronze-based bearings clear and investigate the
remaining amount of lubricant, after sampling, it is necessary to clean
the bearings.
Second,
check the bearing surface of the machine tool spindle bearings, rolling
surfaces and with self-lubricating steel sleeve fit the status as well
as the cage wear status and other damage and abnormal situation,
especially to observe the raceway running track. Determine whether the bearings can be reused, to consider the thrust
ball bearings damage the extent of the machine performance, importance,
operating conditions, check the cycle after the decision.
Check
the results, if you find bearing damage and abnormal conditions, please
identify the cause of bearing damage, develop measures. In addition, the test results, if the following defects, then the
bearings can not be reused, you need to replace the new bearing.
1, maintenance of spindle bearings
In
order to determine whether the demolition of the machine tool spindle
bearings can be reused, to be cleaned after the spindle bearing
inspection, carefully check the raceway, rolling surface, with the state
of the surface, the cage wear, the increase in bearing clearance and
have No related to the reduction of dimensional accuracy of the damage, abnormalities. Non-split ball machine spindle bearings, the inner ring with one hand
to support the level of rotation outer ring to confirm whether the
fluid.
Tapered roller bearings and other separation-type machine tool spindle
bearings, rolling elements can be the outer raceway surface were
examined.
Large spindle machine spindle can not be rotated by hand, pay
attention to check the rolling body, raceway, cage, ribs and other
appearance, the higher the importance of machine tool spindle bearings
must be more careful inspection.
2, the main spindle bearing damage whether the judgment criteria
Whether
to re-use the judge, is to consider the degree of damage to the spindle
bearing capacity, mechanical properties, importance, operating
conditions, to the next maintenance period and decide. However, if the following defects can not be used, you must replace the new bearing.
3, machine tool spindle bearing cleaning
When
disassembling the main spindle bearing for maintenance, first record
the appearance of the main shaft bearing of the machine tool, check the
remaining amount of lubricant, and then take the bearings after taking
the lubricant for inspection. As a cleaning agent, the general use of gasoline, kerosene.
Remove
the machine spindle bearing cleaning, rough cleaning and fine cleaning,
respectively, in the container, put the metal mesh bottom first, so
that the machine spindle bearing does not directly contact the container
of dirt. Rough cleaning, if the bearing with dirt rotation, will damage the rolling surface of the spindle bearing, should be noted. In the rough cleaning oil, use a brush to remove grease, stickies, roughly clean, into the fine wash.
Fine cleaning, is the machine tool spindle bearings in the cleaning while rotating oil, while carefully cleaned. In addition, cleaning oil should always be kept clean.
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