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Grinding wheel used in the installation have to pass strict inspection before, have defects such as cracks of the grinding wheel is absolutely forbidden to installation and use.( 1) wheel mark check. Grinding wheel without markers or not clear, cannot check, confirm the characteristic of the grinding wheel grinding wheel, regardless of whether there is a defect, can not be used.( 2) wheel defect inspection. The examination method is visual and sound check:The visual inspection is the direct visual or with other apparatus on grinding wheel surface if there is crack or damage defects.The sound check or tapping test, mainly for grinding wheel of internal defects, check method is to use wooden hammer grinding wheel. Normal sound crisp sound boring, grinding wheel, hoarseness, illustrates the problem.( 3) wheel rotary strength test. On the types of batch grinding wheel rotary strength testing should be performed, without strength inspection of wheel is installed using batch.Periodic dressing the grinding wheel to maintain good grinding performance and correct geometry, avoid wheel passivation, plugging and profile distortion, often use the dressing tool is the diamond pen. During operation, the dressing tool position is too high, inappropriate dressing direction ( such as inverse wheel rotation direction, tilt angle too large ) or dressing amount is too large, will make the wheel produces strong vibration, or cause a diamond pen gnaw knife, serious will also cause the burst of the wheel. The correct method of operation: diamond pen in the wheel center horizontal line of 1 ~ 2mm, Shun wheel rotation direction, and the horizontal plane is inclined at an angle of 5 degrees to 10 degrees. Dressing evenly, steady speed, a trimming is not too large. The operator should stand in the wheel lateral safety position, can not stand wheel front operation.After dressing grinding wheel must again by turning test, can be used