Punctate burns reasons:

A wheel speed is too fast, the ball suddenly accelerated operation;

Wheel out the grain (block) pad in the ball surface caused a dramatic increase in partial pressure;

3 wheel groove crack or the Swap Block hit the ball;

Machine tool spindle bearing is damaged, make the wheel wobble too much;

Cast iron plate trachoma, stomatal and durum, the partial pressure of the ball surface is too large;

Distributor and cast iron plate of the junction at the entrance does not match, or the distributor back to make the ball a short stay at the entrance, while the grinding wheel Gouyan wounded;

Cast iron plate at the entrance to goal channeling the ditch;

The goal is too slow, the wheel and disk number of balls too little, leaving the ball too much pressure;

The coolant is dirty, repair wheel did not timely clean up the wheel residue.

Bipolar burns reasons:

Some dead space on the machine, so that individual ball is not the normal grinding surface into a big ball, big ball in the groove only revolution, not rotation wheel two-groove edge of the friction extrusion;

A grooved wheel block, the expected first-class foreign body blockage, not timely detect and rule out a long time, the ditch will be lighter, after the ball back into the trench, poles burns.


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