In machining, the heat generated during the process deforms the components and the final shape might not meet specified tolerances. There is therefore a need for a compensation strategy which requires knowledge of the workpiece temperature field and the associated thermal distortions. In this work, a methodology is presented for the determination of the heat load for indexable insert drilling of AISI 4140. Compared to previous research, this work has introduced a varying heat load. The heat load is extracted from thermo-mechanical finite element simulations for different nominal chip thicknesses and cutting speeds using the coupled Eulerian-Lagrangian formulation of an orthogonal turning process. The heat load is then transferred to a simplified 2D axisymmetric heat transfer model where the in-process temperature field in the workpiece is predicted. To verify the methodology, the predicted temperatures are compared to the experimentally measured temperatures for various feed rates. It is found that the model is capable of predicting the workpiece temperatures reasonably well. However, the methodology needs to be further explored to validate its applicability.
CC BY 4.0 DEED
Published: 02 March 2024
The authors would like to acknowledge the Swedish Knowledge Foundation for funding of the CoSim project (Dnr:20160298). We also want to thank Powertrain Engineering Sweden AB and Automotive Components Floby AB for their support and collaboration during the project.
Open access funding provided by University of Skövde. The research leading to these results received funding from the Swedish Knowledge Foundation under Grant Agreement No 20160298.