CONTRIBUTION TO THE STUDY OF THE INFLUENCE OF CUTTING TEMPERATURE IN HARD TURNING

Mokhtar BOURDIM, Leila ZOUAMBI, Siham KERROUZA, Wahid OUDAD

Abstract


The rise in temperature during a machining process is due to a combined effect of the phenomena of dissipation of plastic energy in different zones of deformation and the phenomena of friction. Knowledge of the temperature in machining allows the development of new cutting tools (composition of the material of the tool, geometry, coating, etc.), the increase in tool life in order to reduce the cost of production industrial. In hard turning and by the very principles of cutting, which are quite different than for the usual turning of untreated materials, very high temperatures appear during work (between 500 ° and 1500 ° depending on the case) in the areas contact between cutting edge and workpiece. This leads to softening of the machined material in the areas of contact with the tool. The first factor is the thermal conductivity of the cutting material. For finishing work, a cutting material with low thermal conductivity is the first choice. The temperature during the cutting process is transferred to the shear zone, this which improves the cutting process.


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References


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