Abstract: Aiming at the problems that the temperature prediction in CFRP/Ti lamination drilling process is not accurately predicted, based on the basic principle of heat transfer, a drilling temperature model was established, the drilling temperature was calculated theoretically. Using the finite element method, after determining definite conditions, the discretization of the region and many other steps, a computer program was written to make the model solvable. The laminated drilling experiment was carried out, in which the temperature at specific points at the interface was obtained through embedded thermocouples, and the cutting force and torque were obtained through the dynamometer. The measured values and processing parameters were substituted into the model, and the heat transfer efficiency was obtained by using the temperature at one point. Then, the efficiency was substituted back into the model and the solution result was compared with the temperature of other points measured in the experiment. The results indicate that the calculated temperature has a small deviation from the measured temperature value, the change trend is similar, and the accuracy is high. The model can be used to predict the temperature field of laminate drilling process.
Key words: CFRP/Ti alloy; composite drilling; temperature field; finite element