Abstract:

This study intends to research the movement of the yarn carrier o a rotaty three-dimensional braiding machine in the braiding process of the parts so as to analyze the motion and contact of the yarn carrier, and to understand the impact on the performance of the braided composites. To establish the theoretical formula of carrier by analyzing, using matLab software to draw the movenent theory curve of the yarn carrier, and to establish the virtual prototype analysis model of the three-dimension braiding machine simplified, and the kinematics and dynamics simulation was applied on it with the software of ADAMS. Comparison between theory and simulation curve shows that a sharp point appears in the transition phase of the carrier, and hence a large acceleration exists, which results in contact impact effect to the weaving. The optimal design of trajectory for the yarn carrier is then caried ou a bad. Through the simulation by introducing virtral prototype software, it is shown that optimized speed curve is slow and smooth in transition without a tip point, and the acceleration at the transition is small, therefore it reduces the impact and wear rate. 

Key words: rotary three-dimensional braiding machine, yarn carrier, dynamics, optimal design