CAD Technology for Fabric Weave Design Based on Digital Generation and Arrangement of Yarns

To address the problems of limited basic tissue loops and insufficient control of floating-length threads in WCAD and other programs, the YWCAD system for fabric tissue design was developed by adopting the directional and non-directional dual-path generating mechanism of yarn, the multi-structural generating mode of tissues, and the algorithm of preferential selection of floating-length threads. The directional mode of yarn generates the target yarn based on the fractional structure, and the non-directional mode randomly combines the decomposition conditions through the algorithm to realize the exponential expansion of yarn morphology; the weave generates and builds the single/multi-structure dual mode, with the single structure supporting the manual or random setting of the number of flights, and the multi-structure integrating the three elements of yarn selection, alignment ratio and number of flights to break through the technological bottleneck of the poor diversity of the weave; and at the same time, it introduces three-fold optimization of the maximal floating length, the average floating length and the uniformity of the distribution of the weave points. Simultaneously, the maximum floating length, average floating length, and uniformity of tissue point distribution are introduced as triple optimization indexes, and the intelligent screening algorithm solves production problems such as fabric arching and uneven tension. Experiments show that this system significantly improves fabric tissue diversity while guaranteeing the rationality of the process, and provides a new intelligent solution for the digital generation of fabric tissue.