Problems existing in large grinding wheel

1, surface roughness is too large
The surface roughness determines the quality of the rubber roller, rubber roller surface roughness Ra value is generally appropriate in 0.50.8um between above 75 degree roll, Ra value can be reduced to 65 DEG 0.2um; and non treatment cots due to rollers determines the Ra value formula, too many times will make Ra< 0.5um mill. Roller table roughness through large (Ra>0.8um), are generally caused by the following reasons.
(1) the amount of fine grinding >0.3mm
The number of reciprocating is too little. Taking A802 grinder as an example, the reciprocating frequency of 75 DEG 80 DEG rollers should be not less than 2 times back and forth; reciprocating 65 degrees and non treatment cots should not be less than 4 times.
Atmospheric hole grinding wheel, outside garden trimming is not sharp. The solution is to re - copy the wheel until it meets the requirements.
The balance of the air hole grinding wheel is not adjusted properly. Self vibration of grinding wheel is too large. The balance needs to be reset.
The air hole grinding wheel has different thickness and uneven distribution of air holes and abrasive grains. This kind of air hole grinding wheel is strictly prohibited.
2, surface thread and mottled
Large grinding wheel passivation. We need to copy the wheels.
Both sides of the air hole grinding wheel are blocked by acrylonitrile butadiene powder, and the thread thread is easiest to start.
The grinding wheel speed, the head speed is too small, and the traverse speed is too fast, also easy to start the thread. Generally, the grinding wheel speed in 20002100 rpm, the speed at 500 rpm will also cause this phenomenon can be improved.
The force of the gripping roller is too small, and the rubber roller slips during the grinding process, and the surface of the rubber roller is prone to irregular spots.
3, rubber ring surface blister, mainly rough grinding too large, manual speed is too fast, grinding when rubber roller rotation slow down caused. The effective method to solve the surface annular foaming is to grind or slow down the traverse speed of the bed surface two or more times.
In addition, coarse grinding of the choice of atmospheric holes, grinding wheel size is too small, such as the use of more than 120# of the large air hole grinding wheel, honed when the heat is too large, resulting in rubber inner layer "burns" and ring foaming. Therefore, coarse grinding roller should be selected 45# 60# large hole grinding wheel.