Abstract
The finite element method has successfully been employed to investigate thermal behavior in metal machining. The present paper concentrates on cutting temperature which is affected by thermal properties of work and tool materials, and the coefficient of heat transfer of a coolant. The use of a high-thermal-conductivity tool such as diamond is more effective to reduce the rake temperature than the use of a coolant. This tendency becomes more obvious when a low-thermal-conductivity material such as titanium alloy is machined. However, the cutting edge of a high-thermal-conductivity tool is subjected to an increased mechanical load due to a temperature drop in the work and chip materials; the increase of flow stress causes the cutting energy required in the deformation zone to rise. The rake temperature predicted based on the shear plane cutting model is in fairly good agreement with the experiment, though there exist some limitations of the temperature analysis using the model.
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