2.3.1 Surface Temperature T
Prediction of grinding temperatures and the avoidance of burn are critical to grinding quality. Numerous calculations modeling the partition of heat between the elements in the grind zone have been developed over the last 50 years. Maximum temperature of the workpiece is usually based on an
original paper by Jaeger [1942] and on the principles of moving heat sources described by Carslaw and Jaeger [1959]. Heat partitioning is described in depth by Marinescu et al. [2004]. The following simple version suffices to illustrate the key factors governing maximum surface temperature.
2.3.2 Maximum Workpiece Surface Temperature
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The maximum surface temperature depends on the grinding power (F’- vs), the grinding speeds, and material parameters.
where the thermal parameters that affect grinding temperature are the Cmax factor, the transient thermal property, fiw, and the workpiece partition ratio, Rw.
2.3.3 The Cmax Factor
This is a constant that gives the maximum temperature. The value is approximately equal to 1 for conventional grinding. The value is reduced for deep grinding. Rowe and Jin [2001] give charts of C values for maximum temperature and for finish surface temperature.