Heat Generation and Cooling Performance Evaluation in High-Speed Machining Tools

High-speed machining (HSM) has become a cornerstone of modern manufacturing, especially in the automotive and aerospace industries, where it enables high precision and productivity. However, the intense cutting speeds involved generate significant heat at the tool–workpiece interface, which can lead to rapid tool wear, changes in microstructure, and dimensional errors in finished parts. To address these challenges, this study develops a MATLAB-based transient thermal modeling and simulation framework that analyzes heat generation and cooling behavior in cutting tools subjected to cyclic high-speed loading. A one-dimensional finite difference model was used to simulate heat conduction within the tool material, with a sinusoidal heat flux of 5 Hz frequency applied over a 10-second cutting cycle. The results revealed that the maximum temperature at the cutting edge and tool tip peaked reached about 1200°C, both indicating areas prone to thermal stress accumulation. A thermal gradient of about 3250 °C/m was recorded, highlighting regions where cracks may initiate due to thermal fatigue. Introducing convective cooling with a heat transfer coefficient of over 1000 W/m²·K reduced peak temperatures by 32.4% and delivered a maximum cooling rate. Thermal stabilization marking the onset of a quasi-steady-state condition was achieved at 9.7 seconds into the operation. These insights are vital for improving tool material selection, optimizing coolant application, and ensuring longterm process stability in high-speed machining environments.