Temperature Field Distribution Model in Drilling of CFRP/Ti Stacks Structure

Abstract

CFRP and Ti alloy, which have several excellent properties, are widely used in the field of aircraft manufacturing. CFRP/Ti stacks is one kind of common structure in aircraft assembly process. Drilling is one of the key processes to assemble such structure. 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. The paper gets the heat flux to workpiece through analyzing the heat source during drilling CFRP/Ti stacks, base on which a model to predict the drilling temperature field during drilling CFRP/Ti stacks is established by the Fourier's law. The drilling temperature field is 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. The model can be used to predict the temperature field of stacks drilling process.