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摘要
Purpose: Purpose of this study is to compare two variants of the FEM simulation model of orthogonal cuttingprocess of AISI 1045 carbon steel with uncoated and multilayer-coated carbide tools i.e. standard and Power Law每Temperature Dependent (PL-TD) options. The primary reason for undertaking this problem was unsatisfactoryaccuracy of the predictions of cutting temperature especially for coated cutting tools.Design/methodology/approach: Methodology used employs the Lagrangian-FEM model with more accuratethermophysical properties of the substrate and coating materials. All thermal properties (thermal conductivity anddiffusivity and specific heat) are expressed in the forms of polynomial models of the 5th degree. Multi-layercoating is substituted by homogeneous monolithic layer with equivalent thermal properties. In addition, thesesimulation algorithms use the Johnson-Cook constitutive law.Findings: Basically, the FEM package applied allows the temperature distribution and heat flux intensity to bepredicted closer to appropriate measurements and computations.Research limitations/implications: Research limitations deal with the lack of reliable data and models forboth cutting tool and workpiece material. Future research should be focused on other coatings which are commonlyused in cutting tool industry.Practical implications: They can be related to more detailed inputs from research and developing centerswhich exist in many leading branches of industry. Unfortunately, academic approach is sometimes very narrowand does not consider real machining conditions.Originality/value: Originality of this simulation approach can be seen in elaborating more accurate modelsfor thermal properties. Moreover, it contributes to finding some fundamental relationships between all physicalphenomena involved into tool-chip contact behaviour.
