Abstract: Fiber placement technology is an automated composite manufacturing process, which has many advantages including low cost, high production efficiency, high product quality and so on. As one of the key technologies for the fiber placement, trajectory planning directly influences the placement accuracy and efficiency of composites structure. So far, the domestic fiber placement trajectory planning technology still could not satisfy the need of industrial fiber placement process. To reduce research time of trajectory planning, CATIA CNC machining module is used to generate machining trajectory data in this paper. The machining trajectory information identified by FANUC robot is generated by using vector supplement and format conversion algorithm. By taking advantage of the interpolation algorithm, the delivery points and the cutting points are calculated and composed with the machining trajectory information to achieve the complete fiber placement trajectory information. At last, the fiber placement trajectory information based on CATIA CNC module is tested on the aircraft door placement using the FANUC robot fiber placement equipment, the trajectory end point position error value and the trajectory center distance error value are both controlled within ±0.5mm.

Key words: Composites, Fiber placement, Trajectory planning, CNC machining, Interpolation algorithm