Grinding temperature modeling based on a time dependent heat source
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Jamshidi, Hamid and Budak, Erhan (2018) Grinding temperature modeling based on a time dependent heat source. In: 8th CIRP Conference on High Performance Cutting (HPC 2018), Budapest, Hungary
Grinding is widely used as a finishing operation for improvement of surface quality. However, because of extreme ploughing and rubbing and
high specific energy of the process the heat generation is very considerable. Some portion of the generated heat is transferred to the workpiece
increasing its surface temperature. High surface temperatures may cause problems such as surface burn, microstructural changes and phase
transformations, reduced micro hardness, high residual stresses, white layer formation and decreased fatigue strength of the workpiece.
Predicting of the grinding temperature is the first step for analysis and prevention of these problems. Because of to the height differences of
girts randomly distributed on the wheel, the grinding force is periodic. The fluctuation is more pronounced when the grinding is accompanied
by the wheel run out. Accordingly, heat flux into the workpiece is not continuous and is a function of both location and time. In this paper, a
grinding temperature model is developed based on a time dependent heat source to predict temperature of the workpiece. The proposed model
is validated by measuring workpiece temperature. The results showed that the new model predict the maximum temperature of the workpiece
10-15 percent higher. A good agreement is observed between the model results and experimental data.
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