Characteristics of internal grinding of bearing inner ring
Published on:
2025-09-12 13:57
The characteristics of internal grinding mainly include the following two aspects:
1. Low rigidity of the grinding wheel shaft. When grinding the inner surface, the grinding wheel shaft is limited by its inner diameter and is often made into a thin cantilever beam shape with very low rigidity. For example, the stiffness of internal hole grinding wheel shafts at home and abroad is generally 2.5~5N/um, which has poor stiffness and is easy to deform, thus causing large size and shape errors. The time required for the grinding wheel shaft to recover from deformation during no-feed light grinding is long, and the productivity is very low.
2. Poor grinding conditions. When grinding internal surfaces, the grinding wheel diameter is small. To ensure a certain grinding linear speed, the grinding wheel spindle speed is extremely high, reaching tens of thousands of revolutions, which can easily cause vibration in the grinding system. In inner surface grinding, the contact area between the grinding wheel and the workpiece is large, the abrasive grains are easily passivated and the self-sharpening property cannot be fully exerted, a lot of heat is generated, and it is difficult for the coolant to enter the grinding area, so the workpiece surface is very easy to burn.
Due to poor grinding conditions, the grinding wheel wears quickly and requires frequent dressing.
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