Grinding wheel wear

Maintaining stable grinding forces is preferred rather than high wheel wear rate which can decrease the effectiveness of material removal from the workpiece.

The fractured grain is left with newly exposed sharp edges which attribute the self-sharpening characteristic of grinding wheels and cutting tools in general.

[3] Stage I: As a workpiece enters the grinding zone the initial contact forces are unstable and rise abruptly short period of time and a small wear spot is formed.

The measurable data in this stage presents itself as a linear rate of wear as a function of the working duration of the dresser application or tool life (Td).

[6] The tool life corresponds to the grinding wheels ability to maintain the initial shape give to it during the dressing prior to use.

As the workpiece stays full contact with the grinding zone in the steady state of constant forces the flow of heat generation in the work piece and the wheel maintains equilibrium.

The temperature of the grinding wheel is related to the density of heat flux (φ = dΦ/dA) generated (which also is directly proportional to the feed rate).

[8] An approximate value of the heat flux can be calculated as follows: Φ = Fc • vs Grinding wheels can be made with a variety of materials depending on the desired abrasive quality required during use.

The wheel component of grinder itself is generally composed of abrasive grains held together by a bond structure which contain some amount of porosity.