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Mirror inCNC production type cylindrical grinderDefects that are prone to occur during the grinding process and their treatment methods

When performing mirror grinding on a surface grinder, defects such as surface ripples, burns, scratches, patterns, and abrasion marks (silk flow) often occur. To address these issues, the following measures can be taken:

Surface ripples are mostly caused by smallinternal and external grinding machineCaused by the vibration of the grinding wheel, such as excessive bearing clearance, spindle deviation, poor balance of the motor rotor, and uneven oil film between the spindle and bearings. In addition, poor balance of the grinding wheel can also cause fluctuations. If the grinding wheel is well balanced but still has ripples, the grinding wheel and its mating parts should be inspected or adjusted to completely eliminate the ripple phenomenon.

Materials with high hardness have lower grinding efficiency when processed by a grinder, and the grinding point will generate high temperatures, which can easily burn the workpiece (for example, when grinding W18Cr4V, burns are more likely to occur). To prevent burns, there must be sufficient grinding fluid at the grinding point. Also, the number of back knives.

It should be appropriate, not too big. Reduce the linear speed of the grinding wheel to around 18 meters per second. By using a low-speed 1440r/min M7100A grinder, the burning phenomenon during the grinding process has been basically eliminated. Another advantage of reducing the speed of the grinding wheel is that it reduces the vibration of the wheel frame and also reduces and eliminates the phenomenon of fluctuations.