The working principle of the grinding wheel（1）

The grinding wheel is controlled by stepless speed regulation system, which can easily adjust the grinding speed suitable for grinding various parts. The closed-loop feedback pressure control of electric pneumatic proportional valve is adopted, and the pressure device can be adjusted and controlled independently. The hanging wall is equipped with slow lowering function to effectively prevent the crushing of thin and brittle workpieces. Through a time relay and a grinding counter, the grinding time and the number of grinding circles can be accurately set and controlled according to the processing requirements. The pressure mode can be adjusted during operation. When the grinding time or lap speed is reached, it will automatically stop and give an alarm, so as to realize semi-automatic operation.

In the variable speed control method of the grinding wheel, the grinding process has three stages, namely, the start stage, the formal stage and the end stage. In the start stage, the abrasives rotate at a higher speed, in the formal stage, the abrasives rotate at a constant speed and in the end stage, the abrasives rotate at a lower speed. It is characterized in that in the start stage of grinding process, the acceleration of artificially controlling the abrasives speed increases from zero to fast, When the abrasive speed rises to half of the formal grinding speed, there is an inflection point in the change of acceleration. The acceleration controlling the abrasive speed decreases from fast to slow from the maximum value until the abrasive speed reaches the formal grinding speed, and the acceleration of abrasive speed decreases to zero.