The design of filament winding trajectories for tee shape fitting

For tee pipe coupling, the stable filament trajectories consisting of geodesies and non-geodesies on the main tube and branch tube are studied. And the way how to select winding angle in the intersection between the main tube and the branch tube is presented. Considering the peculiarity of tee pipe coupling, the machine path of main tube and branch tube are well designed for general horizontal winding machine. When winding main tube, the mandrel rotates and the feeding-eye moves in horizontal plane. While winding the branch tube, the mandrel is fixed at specific position and the feeding-eye rotates with the branch tube as center. The perpendicular coordinate is included when winding branch tube. At last, the correctness of the theory is proven by simulation and winding experiment.