基于气缸的三维机织增强体织造系统设计

Design of 3-D woven reinforcement weaving system based on cylinder

为在经纱方向引入贯穿织物厚度的接结纱从而提升机织增强复合材料层间性能,以三维正交无卷曲机织增强体为对象,设计了一种窄幅三维机织织造系统。采用气缸作为开口、引纬和打纬的主要驱动部件,实现多重综框的独立开口运动与管状多剑杆机构的多层梭口同时引纬运动,并在可编程控制器上实现各机构协调运作,使经纬纱垂直平铺,接结纱与纬纱交织并贯穿织物起到层间约束作用。通过显微镜观察三维机织增强复合材料各个切面(分别沿经纱、纬纱和接结纱),并测量纱线卷曲度、横截面积、组织单元尺寸等关键几何参数。测量结果表明,这种三维机织系统可实现三维正交无卷曲机织增强体的织造。

In order to introduce the binder yarns penetrating through the thickness of fabric in the warp direction to enhance the interlayer performance of woven reinforced composites,a narrow 3-D weaving system was developed. The cylinder is used as the main driver for the multiple heald-frames independent shedding opening,multi-tubular rapier weft insertion and beating-up. A programmable logic controller was used to achieve the coordinated operation of weaving process which resulted in warp and weft yarn tiled orthogonal and the binder yarn penetrating through the thickness of fabric for the effect of restraining of layers. The cut planes along three paths（ warp,weft and binder yarn,respectively） of 3-D woven reinforced composite were obtained by the optical microscope. The geometric parameters included yarns crimp percentage,yarn cross-sectional areas and the representative unit cell were measured and the results show that the 3-D orthogonal non-crimp woven reinforcement can be achieved by the 3-D weaving system,which provides a reference for the automation and mass production of 3-D woven reinforcement.