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If all the heat generated goes into the chip, the adiabatic<br />
temperature is given by<br />
T ad<br />
=<br />
U<br />
ρc<br />
…Eq. 19<br />
Where U = specific cutting energy<br />
ρρρρ = the density of the workpiece material<br />
c = specific heat of workpiece.<br />
For lower velocities, the temperature will be less than in Eq.19. The<br />
approximate chip-tool interface temperature is given by<br />
T<br />
T<br />
ad<br />
⎛ 1 ⎞<br />
= C<br />
⎜<br />
R ⎟<br />
⎝ t ⎠<br />
p<br />
…Eq. 20<br />
Where C ~ 0.4 and p ~ 1/3 to 1/2.<br />
R t is thermal number<br />
Note: The finite element method has been<br />
used for calculating the temperature<br />
distributions in the chip and the tool.<br />
Suranaree University of Technology Tapany Udomphol<br />
Jan-Mar 2007
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