Numerical Simulation And Thermodynamic Study Of Titanium High-speed Orthogonal Cutting Process

As an advanced metal cutting technology developed in recent decades, high-speedmachining has beeing rapidly developed into a processing techniques widely used inindustrial production and scientific research with its efficient productivity, good surfacequality and lower processing costs.High-speed metal cutting process is a typical non-linear thermal coupling process usuallyoccurring at a very small range of high strain, high strain rate, large deformation and hightemperature, the material deformation and cutting heat transfer characteristics strongly affectthe cutting process. As an emerging technology, finite element simulation can systematicallystudy the stress and strain,temperature distribution,chip fracture and the characteristics of thefriction and heat and process heat conduction problems in the cutting zone which can not beobserved in traditional cutting process. In this paper, a systematical simulation andexperimental comparison has beeing carried out on the high-speed machining process oftitanium alloy Ti-6Al-4V combined with high-speed machining technology.In this paper,we first summarized the progress of technology research and developmentstatus of high-speed machining, described the process of development and application statusof the titanium material, and discussed the application of numerical simulation technology intitanium alloy high-speed machining. Secondly, we described the finite element theory andmaterial elastoplastic constitutive theory related in high-speed metal machining process andanalysised the elastic-plastic material mechanical properties and the material model used inthe finite element solution process, focused on the grid technology using in FEM,chip-toolfriction characteristic,chip separation technology, and processing of heat and thermalconductivity, given the general process of thermal coupling in finite element analysis. Finally, we established the the finite element model of high-speed orthogonal cutting and analysed thestress-strain and temperature characteristics in the cutting area, observed apparent adiabaticshear phenomenon in the machining process. In the process of validation of the simulationanalysis by using orthogonal factors test, we respectively considered the influence of cuttingspeed, cutting depth and tool rake angle,the simulation results give a well guidance ofmachining process.