There are many types of grinders, and there will be problems in using them, so let's explain these knowledge

First, the surface of the internal grinding machine has vibration marks, the surface roughness is large, and the surface is burned.

Analysis reason:

1. The diameter of the internal grinding wheel of the internal grinding machine is small;

2. Due to the looseness of the spindle of the internal grinder, the bending of the grinding wheel spindle of the internal grinder, the out-of-round dressing of the grinding wheel, etc., produce strong vibrations, causing the surface of the workpiece to be corrugated.

3. Internal grinding wheel of internal grinding machine is blocked;

4. Poor heat dissipation;

5. The grinding wheel of internal grinding machine is too fine, the hardness is high or the dressing is not timely;

6. The feed of the internal grinding machine is large, and the grinding heat is increased.

 

Preventive measures:

1. The diameter of the grinding wheel of the internal grinder should be as large as possible.

2. To adjust the bearing clearance, the main thing is to properly trim the grinding wheel of the internal grinder to reduce the phenomenon of runout and vibration.

3. Select the grinding wheel with coarser strength, looser structure and softer hardness to make it self-sharpening;

4. Select a thicker and softer internal grinding wheel and dress it in time;

5. When grinding on an internal grinder, supply enough grinding fluid;

6. Reduce the feed of the internal grinder.

 

Second, when the internal grinding machine grinds the workpiece, the phenomenon of bell mouth appears on the workpiece.

Analysis reason:

1. The internal grinding machine has uneven feed;

2. The grinding wheel of internal grinding machine has taper;

3. The grinding wheel shaft of the internal grinder is slender.

 

Preventive measures:

1. Properly control the dwell time, adjust the length of the internal grinding wheel shaft of the internal grinding machine not to exceed half the width of the grinding wheel

2. Correctly trim the grinding wheel of the internal grinder;

3. Select the grinding wheel shaft thickness according to the size and length of the inner hole of the workpiece.

Cone hole defects in internal grinding

 

Analysis reason:

1. The adjustment angle of the headstock of the internal grinder is incorrect;

2. The longitudinal feed of the internal grinder is not uniform, and the lateral feed is too large;

3. The grinding wheel shaft of the internal grinder varies at both ends;

4. The grinding wheel of the internal grinder is severely ground.

 

Preventive measures:

1. Re-adjust the angle of the headstock of the internal grinder;

2. Reduce the feed of the internal grinder;

3. Adjust the extension of the grinding wheel of the internal grinder to make it equal;

4. Repair the grinding wheel of the internal control internal grinder in time.

 

Fourth, the circularity error and the internal and external coaxiality error are too large after internal grinding

Analysis reason:

1. The workpiece of the internal grinder is not clamped securely and moves;

2. The thin-walled workpiece clamp to be processed by the internal grinder is too tight and elastic deformation occurs;

3. Inaccurate adjustment of the internal grinder causes excessive coaxiality errors on the inner and outer surfaces;

4. The chuck of the internal grinder is loose on the main shaft, and the gap between the main shaft and the bearing of the internal grinder is large.