23-01-2016, 04:14 PM
Grinding is a material removal process accomplished by abrasive particles that are contained in a bonded grinding wheel rotating at very high surface speeds.The rotating grinding wheel consists of many cutting teeth ( abrasive particles ) and the work is fed relative to the rotating grinding wheel to accomplish material removal.
It is the only economical method of cutting hard material like hardened steel.
It produces very smooth surface , suitable for bearing surface.
Surface pressure is minimum in grinding. It is suitable for light work,which will spring away from the cutting tool in the other machining processes.
Dressing refers to the removing of clogs and blunt abrasive grains from the surface of the grinding wheel. Dressing exposes the cutting edges which restore the correct cutting action of the wheel. Dressing is done on a glazed or loaded wheel to recondition it.
Truing refers to the shaping of the wheel to make it run concentric with the axis. When a new grinding wheel is mounted, it must be trued before use to remove the run out.