Poor grinding

Anomalies Causes Countermeasures

1. Dullness

2. Fast wearing of the grinding wheel

3. Damage of the grinding wheel

4. Oblique cone on the workpiece

5.The grinding materials fall off easily

The grinding wheel is too soft

1. Increase the revolution, outer diameter and width of the

grinding wheel.

2. Reduce the work speed, transverse feeding speed and

pressure of the grinding wheel.

3. The grinding wheel cannot be separated from the workpiece

at the transverse feeding side.

4. The trimming depth of the grinding wheel shall be shallow

and thefrequency of transverse feeding shall be increased.

5. The dilution ratio of grinding oil shall be decreased.

Poor grindability causing the following situations:

1. Smoothness

2. Stuffing

3. Burning of workpiece

4. Simultaneous occurrence of vibration waves

The grinding wheel is too hard

1. Reduce the revolution, outer diameter and plane width of

the grinding wheel.

2. Increase the work speed, transverse feeding speed and pressure

of the grinding wheel.

3. Sharpen the grinding wheel surface often with sharpener.

4. Avoid stopping the grinding wheel at the transverse feeding

side for a long time.

5. Use a rougher or softer grinding wheel.

6. Avoid using gummy coolant or increase the dilution ratio

of grinding oil.

Grinding wheel stuffing

Inappropriate grinding wheel

1. Use a grinding wheel with a rougher structure.

2. Use a grinding wheel with coarser particles.

3. Use a grinding wheel with a softer grade.

Smooth grinding wheel Improper operation

1. Make the grinding wheel softer.

Inappropriate grinding wheel

1. Choose grinding materials suitable for the workpiece.

2. Use a grinding wheel with rougher structure, coarser

particles and softer grade.

Improper dressing

1. Use a sharper diamond dresser.

2. Increase dressing speed and depth.

Improper trimming

1. Use a sharper diamond dresser or sharpener.

2. Increase the trimming speed.

3. Clean the surface of the grinding wheel after trimming.

Inappropriate grinding oil

1. Apply in sufficient and even quantity.

2. Pay attention to the cleanness of the grinding oil when

feeding from the center.

3. Use grinding oil with a better detergency.

Inappropriate cutting fluid

1. Apply in sufficient and even quantity.

2. Use high quality cutting fluid.

Burning and cracking of workpiece Improper operation

1. Reduce the amount of feed.

2. Increase the transverse feeding speed and avoid grinding

using the same site.

3. Avoid stopping the grinding wheel while the grinding wheel

is still in contact with the workpiece.

Inappropriate grinding wheel

1. Use a grinding wheel with rougher structure, coarser particles

and softer grade.

2. Sharpen the surface of the grinding wheel often with a sharpener.

Inappropriate grinding oil

1. Apply in sufficient and even quantity.

2. Apply the grinding oil on the grinding point.

3. Use grinding oil with better lubricity; water insoluble oil is better.