Abstract:

Because the different speed of released-yarn in braiding spindles will cause fluctuations in the yarn tension, and change the quality of a braiding preform. To solve the issue that the speed of released-yarn in braiding spindles effects the yarn tension. Firstly, the range of released-yarn speed was obtained by the research of work-path of high-speed rope braided machine. Secondly, the working theory of spindles was analyzed and yarn tension model can be established. Thirdly, MatLab simulation was calculated based on the tension model. Finally, the simulation results were compared to sum up the laws of spindle applies on yarn tension. At the same time, the process of braiding spindles was divided into several phases and calculated dynamically, and the yarn tension was simulated under different released-yarn speed. The result of research shows that the faster of released-yarn speed can shorten the cycle of yarn tension fluctuation, reduce range of the yarn tension fluctuation, and make yarn tube whirl continuously.

Key words: braiding spindles, released-yarn speed, yarn tension, modeling and simulation