When grinding the ceramic wheel, the axis of the grinding wheel should be equal to the axis of the workpiece. The error of the contour can usually be judged based on the grinding pattern. The surface of the ground ball is convex, indicating that the grinding wheel is grinding in the lower half of the wheel. At this time, the center position of the grinding wheel should be adjusted to be equal to the center of the workpiece until the surface of the ball is crossed.
When the grinding wheel grinds the outer spherical surface, the error is required to be within 0.003-0.004 mm. The grinding wheel frame should be rotated at a certain angle, and the trimming of the inner hole size of the grinding wheel should be completed before the machine adjustment. After the grinding wheel is blunt in the grinding process, it is not necessary to trim the inner hole, as long as the end surface of the grinding wheel is trimmed with a sand bar.
The grinding zone is hot due to severe friction. This can cause stress and deformation of the workpiece and even burn the surface of the workpiece. Therefore, a large amount of coolant must be injected during grinding to reduce the grinding temperature. The coolant can also act as chipping and lubrication.
After the abrasive grain is blunt, the grinding force will also increase, causing the abrasive grain to break or fall off, and the sharp edge will be exposed again. This characteristic is called “self-sharpness”. The self-sharpening makes the grinding normal in a certain period of time. Carry out, but after a certain working time, manual dressing should be carried out to avoid vibration, noise and damage to the surface quality of the workpiece caused by increased grinding force.