关键词: 仿真, 切削, 温度场, 优化, 有限元

Abstract: Based on the tool and workpiece materials, chip deformation model, and the relevant data obtained from oxidation test and friction-wear test, the updated Lagrangian algorithm and the local mesh re-dividing technique are used to build a cutting finite element model more conforming to the actual situation. The change regularity of temperature field in metal cutting process is simulated by finite element software, and the optimum quantities (cutting speed is 200～280 m•min–1, cutting depth is 0.1～0.3 mm) are obtained from cutting 45 steel with the Al2O3/ZrB2/ZrO2 ceramic tool. Relevant cutting test is carried out to verify the precision of simulation. Results show that the simulation results basically agree with the test data, which is even better at high speed. This kind of numerical simulation can provide a theoretical basis for future development of new ceramic tool materials and choice of cutting quantities, thus reducing the test cost.

Key words: Cutting, Finite element, Optimization, Simulation, Temperature field