Modelling of temperature profile in turning with uncoated and coated cemented carbide insert

Abstract

Determination of themaximum temperature during machining process and its distribution along the rake surface is of much importance as it influences the tool life as well as the quality of machined part. The power consumed in metal cutting during turning operation was largely converted into heat.Continuous or steady state machining operations like orthogonal cutting are studied by modelling the heat transfer between the tool and chip at the tool rake surface contact zone. The shear energy is created in the primary zone, where the main plastic deformation takes place, second at the chip tool interface zone where secondary plastic deformation takes place due to the friction between the heated chip and the tool takes place and the third zone where heat is generated at the work tool interface i.e., at the flanks where frictional rubbing takes place.The friction energy produced at the rake face chip contact zone and the heat balance between the chip and stationary tool are considered
Numerous methods have been generated to approach the problem such asexperimental, analytical and numerical analysis. In addition temperature measurement techniques used in metal cutting have been briefly reviewed. This work includes the study oh heat influencing the cutting tool in both uncoated and coated insert. The numerical methodology used here is ANSYS.Finite element method was used to model the effect of coated and uncoated cemented carbide cutting tool.
After solving the solution obtained showed that the temperature at the tip( tool-work piece contact area) was maximum and it goes on decreasing towards the surface and it was also observed that the temperature generated for coated tool is little less in comparison to uncoated cemented carbide insert this shows that the tool life can be increased by placing a coating layer of TiN.