Abstract
Orthogonal cutting experiments were carried out on steel at different feedrates and cutting speeds. During these experiments the chip temperatures were measured using an infrared camera. The applied technique allows us to determine the chip temperature distribution at the free side of the chip. From this distribution the shear plane temperature at the top of the chip as well as the uniform chip temperature can be found. A finite-difference model was developed to compute the interfacial temperature between chip and tool, using the temperature distribution measured at the top of the chip.
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Abbreviations
- \(\overline {AC}\) :
-
contact length with sticking friction behaviour [m]
- c :
-
specific heat [J kg−1 K−1]
- \(\overline {CD}\) :
-
contact length with sliding friction behaviour [m]
- F P :
-
feed force [N]
- F V :
-
main cutting force [N]
- h :
-
undeformed chip thickness [m]
- h c :
-
deformed chip thickness [m]
- i,j :
-
denote nodal position
- k :
-
thermal conductivity [W m−2 K−1]
- L :
-
chip-tool contact length [m]
- p :
-
defines time—space grid, Eq. (11) [s m−2]
- Q C :
-
heat rate entering chip per unit width due to friction at the rake face [W m−1]
- Q T :
-
total heat rate due to friction at the rake face [W m−1]
- Q % :
-
percentage of the friction energy that enters the chip
- q 0 :
-
peak value ofq(x) [W m−2]
- q e :
-
heat rate by radiation [W]
- q(x):
-
heat flux entering chip [W m−2]
- t :
-
time [s]
- T :
-
temperature [K]
- T C :
-
uniform chip temperature [°C]
- T max :
-
maximum chip—tool temperature [°C]
- T mean :
-
mean chip—tool temperature [°C]
- T S :
-
measured shear plane temperature [°C]
- x,y :
-
Cartesian coordinates [m]
- V :
-
cutting speed [m s−1]
- V C :
-
chip speed [m/s]
- α:
-
rake angle
- β,γ,δ:
-
control volume lumped thermal diffusivity [m2 s−1]
- ε:
-
emmittance for radiation
- η:
-
exponent, Eq. (3)
- ρ:
-
density [kg m−3]
- σ:
-
Stefan-Boltzmann constant [W m−2 K4]
- τ(x):
-
shear stress distribution [N m−2]
- φ:
-
shear angle
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Jaspers, S.P.F.C., Dautzenberg, J.H. & Taminiau, D.A. Temperature measurement in orthogonal metal cutting. Int J Adv Manuf Technol 14, 7–12 (1998). https://doi.org/10.1007/BF01179411
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DOI: https://doi.org/10.1007/BF01179411