| The finite element method is a numerical method for solving mathemati-cal physics problems based on the variational principle§and its fields have beenexpended from the original solid mechanics to electromagnetics§fluid mechan-ics§heat transfer and acoustics§etc.The purpose of thermal analysis is to calcu-late the temperature distribution of the objects within the given thermal bound-ary§and it can calculate the steady temperature field and unsteady temperaturefield. In this dissertation, distribution of temperature field in plunge milling Ti-Alloy is researched based on FEM.Because of the little thermal conductivity, high chemical activity and soon§the problem occurred during the milling operation such as high cutting tem-perature§large unit force and serious tool wear§lead to less applications of Ti-tanium alloys§plunge milling is an efective machining methods for high efcientmetal removal§especially for the hard-machine-materials.In this dissertation§at first through analyzing the cutting-heat in the pro-cess of plunge milling Ti-Alloy from the metal cutting theory§the heat conductionequations of work piece and tool were respectively concluded§and the mathemat-ical model of the titanium plunging was established on this basis. Then by respec-tively calculating the elliptic equation and parabolic equation in FEM§and usingMatlab for numerical simulation§we get the temperature distribution of workpiece and time-dependent temperature distribution of the tool. Finally compar-ing the numerical results with experimental data, we can verify the accuracy andreliability of the finite element model§and get a more accurate conclusion. It willbe an important reference to the cutting parameter optimization and tool designin the process of titanium plunge milling. |
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