When inspecting the thrust ball bearings that have been removed during the periodic inspection and operation of the machine tool spindle bearing equipment and the replacement of the peripheral parts, it is necessary to determine in turn whether the secondary bearing parts can be reused and the usage is better or worse. Also carefully investigate and record the removed bearings and appearance. In order to clarify and investigate the remaining amount of lubricant, the bearings should be cleaned well after sampling. Piezoelectric Buzzer For Driver Circuit Built-in
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Next, check the raceway surface of the machine tool spindle bearing, the condition of the rolling surface and the mating surface, and the wear state of the cage, etc., for damage and abnormality, especially to observe the running track of the raceway surface. To determine whether the bearing can be used again, it is necessary to consider the degree of damage to the thrust ball bearing, machine performance, importance, operating conditions, inspection cycle, etc.
If the bearing is found to be damaged or abnormal, please find out the cause according to the phenomenon of bearing damage and formulate countermeasures. In addition, the inspection results, if there are the following defects, the bearing can no longer be used, need to replace the new bearing.
1. When cleaning and disassembling the spindle bearing of the machine tool, first check the appearance of the spindle bearing of the machine tool, confirm the residual amount of the lubricant, and wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.
The removed spindle bearings of the machine tool are cleaned and finely cleaned. In the container, the metal mesh bottom is placed first, so that the spindle bearings of the machine tool do not directly touch the dirt of the container. In the case of rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the spindle of the machine tool and should be noted. In the rough cleaning oil, use a brush to remove the grease and the adhesive. After it is almost clean, it is transferred to the fine wash.
Fine washing is to carefully clean the machine spindle bearings while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.
2. Inspection and repair of machine tool spindle bearings In order to judge whether the disassembled machine tool spindle bearings can be reused, it is necessary to check the machine shaft bearings after cleaning, and carefully check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, Increase in bearing clearance and whether there is damage or abnormality in terms of dimensional accuracy degradation. For the non-separable ball machine spindle bearing, use one hand to support the inner ring and the outer ring to check whether it is smooth.
Separate machine tool spindle bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.
Large machine tool spindle bearings can not be rotated by hand. Pay attention to the appearance of rolling elements, raceways, cages, ribs, etc. The higher the importance of machine tool spindle bearings, the more careful inspection is required.
3. The judgment of whether the judgment standard of the spindle bearing of the machine tool can be reused is determined by considering the damage degree of the spindle of the machine tool, the mechanical performance, the importance, the operating condition, and the period until the next inspection. However, if there are the following defects, they can no longer be used, and new bearings must be replaced.