Design Of Justable Weft-insertion System Of3-D Loom

Textile composite material reinforced by fiber, yarn and fabric is a kind of composite material combining3-D textile fabric and substrate. There are many different types of textile composites. Because of their good nature integrity and profiling, the overall woven three-dimensional composite materials has very important applications in the aerospace, transportation, energy, environmental protection, building facilities, sports and so on. Nowadays, with the development of composite materials technology and the improvement of3-D fabrics quality and function, it has become the research hotspot to develop the3-D loom which can weave the three-dimensional fabric.This thesis mainly research about3-D rapier loom’s weft-insertion mechanism and its control system as following:1) The key technology to weave the irregular section three-dimensional fabric is researched, and the weaving technics of the3-D rapier loom is designed. Especially, the adaptability of3-D looms’varieties and standards are mainly considered. On the basis of existing technology, according to the special requirements of weaving3-D fabric, the mechanisms are designed for shedding, weft-insertion, selvedge apparatus, beating-up, let-off and take-up motion.2) Based on the analysis of the motion law of a rapier and the characteristics of rapier loom’s weft-insertion mechanism, according to the special requirements to loom’s weft-insertion mechanism for weaving three-dimensional fabric, a new rapier weft-insertion system is present, in which the servo-motor is adopt to control weft motion. Based on the structure of3-D fabrics, we could program with computer to control driver and then to drive the servo-cylinder to move. The rapiers are connect with servo-motor’ pusher, and with move of the pusher, rapiers could achieve weft-insertion with justable moving range.3) PC control software and programs are programmed by VB software. The program includes data input, status display and other functions. In the control system designed, the PC communicates with PLC via serial communication, the necessary control information and parameter setting data are input storage area and real-time data of PLC feedbacks are got.