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Titanium alloys are difficult to machining due to their physical and mechanical properties. An effective method of research the cutting process is to study using simulation models. The article describes the results of rheological simulation of titanium alloys cutting processes using the DEFORM software. The results of the stress-strain and thermodynamic state of the workpiece and tool, cutting force studies in the chip formation zone depend on the machining parameters are given. It has been proven that the process of chip formation in the machining of titanium and nickel alloys takes place under conditions of unstable cutting, which contributes to the generation of residual stresses, which arise synchronously with the increase of radial cutting force. The result of this process is an intense tool wear and dynamic instability in the cutting zone. The machinability of the titanium alloys essentially depends on the cutting parameters. The main causes of low workability are high cutting temperature, saw-tooth type of chip (as a result of an asynchronous change in longitudinal and transverse cutting forces), the adiabatic process of the chip formation, tool vibration and intense tool wear. |
