1. Scars left on the polished surface
Reason: The hardness of the control board is too high. The surface of the control board is attached or fused with small pieces that are ground into fragments or grinding wheels.
Countermeasure: The control board should be changed to soft cooling water and soluble cutting oil.
2. Equally spaced spiral marking
Reasons: the edge contact of the grinding wheel, poor guide rail adjustment, high dressing speed, diamond damage and wear, and loose diamond cage are the reasons for the spiral marks in the gaps of centerless grinders.
Countermeasure: The edge of the grinding wheel is tapered, so that the guide plates are parallel. Reduce the dressing speed, reduce the feed rate, change the diamond contact surface or replace the diamond holder.
Three, equal or unequal distance thin lines
Reason: poor repair, external vibration.
Countermeasure: Starting from the edge of the grinding wheel, the dressing speed must maintain a certain edge vibration.
4. Deep and irregular traces.
Reason: the slack of the grinding wheel
Countermeasure: Insert the lining between the cam and the grinding wheel and make it stable.
Five, vibration
Reason: The mounting screws are loose and the grinding wheel is unbalanced.
Countermeasures: Convert the weight of the load into a balanced distribution, place the platform flat and restore balance.
6. Self-excited vibration
Reasons: the heart height is too high, the angle of the supporting cutter head is too large, the supporting cutter head is too thin, the supporting cutter head is poorly installed, the cutter head support is bent, the grinding volume is large, the selection of frosting is poor, the roundness of frosting is poor, the platform for setting the grinding wheel Relaxation, spindle relaxation, external vibration.
Countermeasures: reduce the center height, reduce the angle, increase the thickness of the screw, replace the clamping screw, correct the support blade, reduce the increase of the grinding wheel, discuss with the grinding wheel manufacturer, adjust before and after the balance, lock the screw to an equal sign, and relock Screw, adjust the spindle of the grinding wheel, re-lock the bracket to exchange diamonds, and isolate external vibration.
Seven, can not get true roundness
Reason: The center height is too low, the supporting blade angle is too small, the grinding wheel hardness is large, the grinding pressure is large, the grinding volume is large, the adjusting wheel is loose, the cooling water is insufficient (when the hollow object is ground), and the correction is poor.
Countermeasures: increase the center height, increase the angle, increase the advancing speed, increase the correction speed with a sharp diamond, reduce the feed at a high speed for the first grinding, re-tighten the adjustment wheel spindle screw, add coolant at the good contact point, and then Recalibrate.
8. Middle high or low middle
Reason: The adjustment of the guide plate is not good.
Countermeasure: Parallel the guide plate, reduce the tilt of the adjusting wheel and the bottom of the basket, and increase the angle of the adjusting wheel trimming device.
