Grinding method of circular cutter

　1. Start the grinding from the blade plane to ensure that it is bright without blunt mouth, and then grind the side. Pay attention to the parallelism.
　　2. If it is found that the grinding plane of the blade is inclined, adjust the grinding pressure and apply force appropriately on the thicker side.
　　3. Always check the accuracy of the grinding plate and calibrate the plate.
　　4. During the whole grinding process, if the workpiece temperature exceeds 40-50 ℃, it shall be suspended for a certain period of time and continued after cooling, because heating will affect the accuracy of the blade. After the round blade is polished, it can maintain its basic ability, shear the workpiece more vigorously, and ensure the smoothness of the whole shear process.
5. The polished round blade shall be coated with a layer of antirust fluid to avoid rust.