Abstract
In this study, the influences caused by the wear of grinding wheel are investigated experimentally. The infrared radiation pyrometer with an optical fiber is developed and applied for the temperature measurement in the surface grinding process of carbon steels. Experimental data such as the temperature, the number and the size of effective cutting grains and the grinding forces are obtained over the wheel life, and they are used for the calculation of the thermal energy fraction to the workpiece, the grinding wheel and the chips. Thermal damage begins to be caused on the ground surface, as the attrition wear of grains decreases the number of effective cutting grains and degrades the efficiency of grinding wheel. The measuring of radiation pulses from the cutting grains makes it possible to detect the degradation of grinding wheel at an early stage of wheel life and prevent the severe damages on work surface.
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Abbreviations
- a :
-
wheel depth of cut
- a t :
-
actual depth of cut
- b w :
-
width of workpiece
- C :
-
specific heat
- d :
-
core diameter of optical fiber
- d g :
-
size of cutting edge
- D :
-
diameter of grinding wheel
- F n :
-
normal grinding force
- F t :
-
tangential grinding force
- k :
-
thermal conductivity
- K :
-
thermal diffusivity (= k/ρC)
- l :
-
half of grinding-zone length
- L :
-
dimensionless value of l
- n :
-
number of cutting grain per unit length
- q :
-
heat flux per area
- Q :
-
heat generated per unit time
- t :
-
measuring distance of pyrometer
- T :
-
temperature
- ν :
-
speed
- V :
-
removal volume of work material
- β:
-
thermal speed partition coefficient
- ρ:
-
density
- c:
-
chips
- g:
-
grinding wheel
- w:
-
workpiece
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Yamada, K., Ueda, T. & Hosokawa, A. A study on aspects of attrition wear of cutting grains in grinding process. Int. J. Precis. Eng. Manuf. 12, 965–973 (2011). https://doi.org/10.1007/s12541-011-0129-1
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DOI: https://doi.org/10.1007/s12541-011-0129-1