Considering the influence of minimum quantity lubrication for modelling changes in temperature, forces and phase transformations during machining

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Abstract

The purpose of this study aims at presenting a method for modelling machining processes considering Minimum Quantity Lubrication (MQL) in a 2D and 3D FEM simulation by using the example of machining tempered steel AISI 4140. All parameters required for the FEM simulation are calculated within the multiphase simulation code INSFLA and the formula for the heat conduction coefficient is derived. To consider the influence of phase transformations of the fluid, separate experiments are performed. Furthermore, the friction coefficient is measured experimentally in dependence of the relative sliding velocity, contact pressure and temperature during machining with MQL as well as under dry conditions. The extended friction model is used for the 2D and 3D models. MQL machining experiments are performed for the purpose of validating these models. The main focus of the experiments is layed on cutting temperatures, forces and phase transformations on single workpieces.

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Bollig, P., Faltin, C., Schießl, R., Schneider, J., Maas, U., & Schulze, V. (2015). Considering the influence of minimum quantity lubrication for modelling changes in temperature, forces and phase transformations during machining. In Procedia CIRP (Vol. 31, pp. 142–147). Elsevier B.V. https://doi.org/10.1016/j.procir.2015.03.025

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