FRP/Ti叠层结构钻削温度场的研究

FRP and titanium, which have excellent material properties, are widely used in the field of aircraft manufacturing. CFRP/Ti stacks is one kind of the common structure in aircraft assembly process. Drilling is one of the key processes to assemble such structure, and its manufacturing quality has a significant influence on assembly quality and the service life of the aircraft. CFRP and titanium alloy are both hard-cutting materials. Heat concentrated and high drilling temperature may happen during drilling CFRP/Ti stacks due to their low thermal conductivity, and it may lead to hole damages such as the burn on matrix of CFRP. In this paper, the heat flux to workpiece through analyzing the heat source during drilling CFRP/Ti stacks was obtained, based on which a model to predict the temperature field during drilling CFRP/Ti stacks is established by the Fourier's law. The drilling temperature field was calculated by the finite difference method, and the experiment of drilling CFRP/Ti stacks is carried out. The analytical result agrees well with experimental data.