回转体仿形织物的研究

【作者】 徐良平；

【导师】 郭兴峰；

【作者基本信息】 天津工业大学 ， 纺织工程， 2007， 硕士

【摘要】 回转体仿形缠绕织物是按照回转体模型的展开曲面生产的单层机织布，它主要利用现有的织造技术，通过改进织机的送经和卷取机构，可使织机具有机械化生产仿形织物的能力。本课题主要围绕回转体仿形缠绕织物进行研究，详细阐述了回转体仿形织物的生产原理、织物结构均匀设计及织造方法，并完成回转体仿形织物的上机织造，讨论和分析了缠绕仿形织物的贴服性情况，以及指出了织物织造过程中的需要注意的问题。实际织造实验分两个部分：一是圆台形回转体仿形织物的织造，二是纺锤形回转体仿形织物的织造。为了更好的改善仿形织物的贴服成型，使得生产的仿形织物具有较高的仿形精度，本课题在满足织造需要的前提下，对普通织机的送经、打纬和卷取机构进行了改造。在圆台形回转体仿形织物织造过程中，根据所需织造的仿形织物的参数去设计圆台形卷取辊的锥度，可以有效提高圆环织物的贴服性能。而在纺锤形回转体仿形织物的织造过程中，通过分析和讨论仿形织物贴服不良产生的原因及影响因素，建立了表达仿形织物贴服性系数的简单方程以及计算公式，并且在实际织造中通过观察得知织物开始发生贴服不良时的贴服性系数，以此确立纺锤形回转体曲面段细分的标准一贴服性临界值。若整个曲面段的贴服系数小于等于贴服性临界值，则不需重新细分；反之，则需要重新细分，直至小于等于贴服性临界值为止。通过对纺锤形回转体两端弧面部分的细分，可以尽可能的减小两端仿形织物在织造时的贴服不良。在上机图的设计中，根据细分标准，若需要细分则采用分区设计，有利于织物更好的贴服成型。从织物的整体成型效果看，结果还是较为令人满意的。相对于复合材料的缠绕工艺而言，仿形织物避免了缠绕工艺所需的专用缠绕机器，并且能够使织物在模型的曲面部分一次成型，不仅减少了裁剪工序，降低了生产成本，也有助于提高织物的力学性能有所提高。更多还原

【Abstract】 The woven fabric for shape winding is a kind of single layer woven cloth, which was produced in accordance with the shape spread out by the solid of revolution. Its manufacturing uses mainly the present weaving technology. By improving the let-off and take-up mechanisms in the weaving machine, shape fabric can be manufactured in mechanization. The study mainly focused on shaping winding woven fabric for the solid of revolution, expatiating on weaving theory of shape fabric for the solid of revolution, design of an even structure, weaving methods and then manufacturing shape fabrics, research of molding for shape fabric, and indicate some problems in the weaving shape fabric.Actual experiment of the weaving shape fabric is divided into two parts: One is the weaving annular fabric , another is the weaving shape fabric of the spindly solid of revolution .In order to improve molding effect fot shape fabric, the study based on the premise that met weaving requirements improved the let-off, beating and take-up mechanisms in the weaving machine. In the weaving annular fabric, the taper roller is designed by the parameters of shape fabric, which can improve the molding effect of shape fabric. In the the weaving shape fabric of the spindly solid of revolution, the study focused on the reason of the bad molding, found a formula to expatiate the molding coefficient, and elicit critical coefficient by observing the molding effect in weaving fabric when shape fabric begin to occur the bad molding. The critical coefficient can become standard of deciding whether the convex parts of the spindly solid of revolution is fractionized.The design of convex parts of the spindly solid of revolution after fractionizing can improve the molding effect of shape fabric.更多还原