Introduction: During grinding operations with grinding wheels, intense heat generation often occurs at the contact point between the workpiece and the grinding wheel, leading to a significant increase in temperature in that area. According to theoretical analysis and actual measurements of heat transfer, these instantaneous temperatures can potentially reach 1000 to 1500 degrees Celsius. Such extreme high temperatures can have various effects on the workpiece surface, including the formation of an oxide layer, the generation of amorphous structures, high-temperature tempering, and secondary quenching, all of which can impact the performance of bearings.

Causes and Effects:

1. Formation of Oxide Layer: When the workpiece surface reaches high temperatures momentarily, it reacts with oxygen in the air, forming an extremely thin layer of iron oxide, approximately 20 to 30 nanometers thick. The thickness of this oxide film is closely related to the quality of grinding and is an important indicator of the grinding process.

2. Amorphous Structure Layer: Under high-temperature conditions, the workpiece surface undergoes melting and forms an extremely thin layer of amorphous structure, approximately 10 nanometers thick, upon cooling. While this layer has higher hardness and toughness, it is easily removed during precision grinding.

3. High-Temperature Tempering Layer: Due to the effect of instantaneous high temperatures, the temperature within a certain depth range of the workpiece surface will rise above its tempering temperature. Without reaching the austenitizing temperature, high-temperature tempering structural changes corresponding to the heating temperature occur layer by layer, resulting in a decrease in hardness. The higher the heating temperature, the more significant the hardness reduction.

Solutions to Address Heat Generation in Japanese Axis Research Precision ZNY Bearings:

1. Choose Japanese Axis Research Precision ZNY bearings that meet specified accuracy grades to enhance bearing precision.
2. Repair the spindle or housing to eliminate issues such as spindle bending or non-concentric holes in the housing.
3. Adjust the tension of belts reasonably to prevent them from being too tight.
4. Use lubricants from specified brands and keep them clean to ensure proper lubrication.
5. Improve assembly quality to ensure correct bearing installation.
6. Replace bearings and other worn components to prevent bearing housing misalignment.
7. Clean and adjust the clearances of sealing rings to maintain a gap between 0.2 to 0.3 millimeters while adjusting the diameter of impeller balance holes and verifying static balance values to reduce axial forces.
8. If bearing damage is detected, promptly replace Japanese Axis Research Precision ZNY bearings.

By implementing the above measures, you can effectively address the issue of heat generation in Japanese Axis Research Precision ZNY bearings and ensure their normal operation.