The Principles for Diamond Grinding Wheel Dressing

Diamond grinding wheels as highly efficient grinding tool are widely used in hard alloy, ceramics, CBN and other processing fields of superhard materials. Diamond grinding wheel dressing can largely determine the performance and service life of grinding wheel.

The dressing method of diamond grinding wheel is one of the important factors affecting grinding performance of grinding wheel. The proper selection of dressing methods will directly affect the surface quality and grinding precision of workpieces.

At present, the common dressing methods of diamond grinding wheel include: online electrolytic dressing, EDM grinding wheel dressing, cup wheel dressing, electrolytic - mechanical composite finishing and laser trimming. Because the cup wheel dressing method is simpler and easier to realize than other dressing methods, so GC cup wheel dressing technique is often used in diamond grinding wheel.

For diamond grinding wheel dressing, it is usually divided into two phases: truing and sharpening.

Truing is to make micro cutting for grinding wheel, whose purpose is to remove the shape error of grinding wheel after initial installation and surface defects, and ensure the geometry accuracy of grinding wheel.

Sharpening is because of the passivation of grinding wheel after working for a period of time, in order to make the cutting blade extrude the bond and get appropriate height to make chip space formed between abrasive grains, and make effective abrasive grains number per unit area as much as possible.