Studies on the Fundamental of Grinding Burn (2nd Report)
Surface Temperature in Process of Oxidation
1979 Volume 45 Issue 529 Pages 83-88
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1979 Volume 45 Issue 529 Pages 83-88
The thickness of the metal oxide layer formed on the ground surface is related to the oxidation rate law of the workpiece and the surface temperature in the grinding process. In the present research, the influences of the thermal characteristics of the workpiece and the grinding conditions on the surface temperature of the growing layer after get out of contact with the grinding wheel are studied. The results are as follows.
(1) Theoretical temperature distributions which are calculated by assuming a linear heat source strength with a maximum at the front of the contact zone and zero at the rear, agree with the experimental results.
(2) The relation between the exit, temperature θr at the rear end of the contact zone and the maximum temperature θm is given by θr=0.693θm, and the subsequent surface temperature θa is expressed as θa=θr(ντ/ι)-α, where ι, ν and τ are the semilength of the heat source, the table speed and the lapse of time, respectively.
(3) The value of the cooling coefficient a is about 0.454 and it is almost independent on the thermal characteristics of the workpiece and the grinding conditions.
