As a typical difficult-to-machine material

beryllium material is mainly processed by turning

but beryllium material is harder and more brittle

which often has local fractures and sharp edge chipping defects; Cutting force is an important factor that affects tool wear and processing quality

predicting the cutting force of turning beryllium materials is of great significance to the selection of cutting parameters. Based on the semi-empirical prediction formula of mechanical analysis

this paper establishes a thermal-mechanical coupling-based cutting force prediction model for beryllium turning

and conducted experimental verification. The result shows that the predicted value of the model fits well with the experimental value

and the overall error is 10.79%

the error range is 2.96% – 20.53%. The change mechanism of tool wear and surface roughness under different cutting parameters is analyzed

which provides a certain theoretical reference for beryllium turning processing.