Dressing And Truing Of The Grinding Wheel

Dressing
Dressing is the conditioning of the wheel surface which ensures that grit cutting
edges are exposed from the bond and thus able to penetrate into the workpiece
material. Also, in dressing attempts are made to splinter the abrasive grains to make them sharp and free cutting and also to remove any residue left by material being ground. Dressing therefore produces micro-geometry. The structure of micro-
geometry of grinding wheel determine its cutting ability with a wheel of given
composition. Dressing can substantially influence the condition of the grinding tool.
Truing and dressing are commonly combined into one operation for conventional abrasive grinding wheels, but are usually two distinctly separate operation for superabrasive wheel.

Truing
Truing is the act of regenerating the required geometry on the grinding wheel,
whether the geometry is a special form or flat profile. Therefore, truing produces the
macro-geometry of the grinding wheel.
Truing is also required on a new conventional wheel to ensure concentricity with specific mounting system. In practice the effective macro-geometry of a grinding
wheel is of vital importance and accuracy of the finished workpiece is directly related
to effective wheel geometry.