Numerical Simulation Research Of Turing With Ultrahard Material

The machining of ultrahard material has been a problem for a long time, because whenthe ultrahard materials are machined by ultrahard tools, the tools not only bear great cuttingforce, but also bear the high temperature which is produced by the chip deformation and toolwear, the blade wears very quickly, the cutting force increases rapidly too. With thedevelopment of modern society, the demand of ultrahard materials is also growing, but therewill be more outstanding contradiction between the great process cost of the ultrahardmaterial and low processing efficiency, so if the problems of cutting ultrahard materials willnot be well solved, the application scope will be restrict. The FEM is an effective researchmethod in the cutting process; the contradiction will be well solved, the researches of turningof ultrahard material effectively and lower costly, if the research use the FEM technology.Based on the theory of metal cutting and FEM, in view of cutting property characteristicsof ultrahard material, the2D and3D FEM model that adapted to the hard cutting,whichsimulates the cutting force and cutting temperature, can be set up by the two FEMsoftware(ANSYS LS-DYNA,AdvantEdge FEM), which can be adapt to cutting ultrahardmaterial. The paper considers property that the temperature, the time, the flow stress plasticstrain, stains rate can effect on mechanical property to simulate the nonlinearity problem ofmaterial. The cutting process was simulated by remeshing technology and the shear failurecriteria, element deletion and adaptive remeshing technology; the finite element methods ofupdated Lagrangian and ALE formulation were adopted for deal with the problem ofgeometry nonlinearity in hard cutting; In the K file formed by LS-DYNA processor, it canadd keywords relevant thermal analysis and analysis thermal coupled field. The paper obtainthe cutting property of ultrahard material under different cutting parameters, for example thetrends of cutting force and cutting temperature under different cutting conditions. The paperprovides an effective method for the optimization of process parameters of turning ultrahardmaterial and the prediction of cutting force and cutting temperature.The paper do a series of experiments with cutting temperature experimental system, thatcompare the experimental data and the simulation results of the AdvantEdge3D software,their results have consistent regularity, which verifies the reliability of the research method.The research result show that the FEM analysis model of CBN tool turns the hardenedGCr15can be well used as numerical analysis of turning ultrahard material, The paper set uporthogonal regression equation of the cutting temperature with the finite element simulationdata as a experimental data of the virtual cutting, it can partly replace cutting experiment, andis a kind of high efficiency, low cost method that study the cutting mechanism of ultrahard material, it has a certain simulative effect to the ultrahard material machining technology inactual application.