Thermal-coupling Field Analysis And High-speed Cutting Performance Evaluation For The Curve-edge Turning Insert

As the theory foundation of the high-speed cutting, the research of the mechanism of HSC is the foundation of the application and development of the HSC technology. Cutting edge type edge form has important influence in the high speed cutting process, and its thermal-mechanical coupling field distribution and changing influences the cutting properties of the cutter.At present, the analysis for thermal-mechanical coupling field at high cutting speed mainly focus at the analysis for the single physical field of the specific inserts, and do not make the analysis and study for its action law.So, it is necessary to do deeply study for the distribution and change law of the inserts thermal-mechanical coupling field.On the base of research on the high speed machining mechanism of curve edge inserts, the thesis makes the edge type edge form during curve edge turning insert cutting aluminum alloy as research object, extracts the parameters of edge type edge form of curve edge turning insert, uses finite element method of adaptive finite element mesh generation, establishes high-speed cutting thermal-mechanical coupling simulation model, founded fuzzy matter-element evaluation model at high-speed cutting according to the fuzziness of the thermal-mechanical coupling field distribution at high-speed cutting, optimizes the each edge type edge form at curve edge turning cutting edge.The main research contents including as following aspects:First, the thesis analyzes the influences of the curve edge turning insert edge type edge form to the high-speed cutting process, establishes the theoretical model of the parameters for the curve edge cutting layer, and analyzes the influence for the characteristic parameters of the insert edge type edge form which are extracted according to the model to the heat and force.Second, the thesis according to the problem of high-speed cutting, using the theory of high-speed thermal-mechanical coupling, constructs nonlinear constitutive model of the workpiece material. The thesis also establishes the finite element model of the curve edge high-speed cutting thermal-mechanical coupling, and analyzes the simulation result, according to the characteristics of curve edge turning insert high-speed cutting and on the base of the studying on mesh distortion in cutting simulation and adaptive mesh generation.At last, through the finite element simulation result, according to the problem of fuzziness and incompatibility for the simulation result, the thesis through the analysis of weight for force and heat , founds the fuzzy matter-element evaluation model for the curve edge turning insert edge type edge form, using the fuzzy matter-element evaluation theory, then optimizes the curve edge turning insert edge type edge form using the model.The result and experiment shows that optimization for the insert edge type edge form can improve insert cutting properties effectively.