纤维缠绕弯管线型及装备的研究

发布时间：2018-11-17 10:12

【摘要】：复合材料弯管是典型的非轴对称零部件,它的生产难度大,是因为其规格系列多、形状结构复杂。制约玻璃钢管道发展的主要因素并不是管道的性能,而是管道的配件跟不上。目前生产所需的复合材料弯管生产效率低,质量也难以保证。随着复合材料弯管在化工企业的推广使用,中小口径的弯管用量愈来愈大,迫切需要用机器缠绕复合材料弯管,实现自动化生产弯管。因此需研究开发新的缠绕技术包括缠绕机的结构设计、新的稳定纤维路径的设计与计算、非轴对称体的缠绕模式设计等。纤维缠绕成型技术的难点在于纤维缠绕线型的设计。标准的纤维缠绕回转体线型设计已经趋于成熟,对于一些非回转体的异型面的缠绕线型研究仍存在很多难点,如架空问题和缠绕不均匀的问题。弯管由圆柱段和圆环段组成。本课题将利用圆环面上的测地线和圆柱面上的非测地线和曲面样条生成弯管的缠绕路径,通过在端头加入停留缠绕,控制好落纱点,给出弯管缠绕的代数模式,就能走出稳定的缠绕线型,防止滑线的现象产生,从而实现复合材料弯管缠绕轨迹的设计和均匀覆盖。本文将设计微机控制的五轴卧式纤维缠绕机来实现弯管的缠绕。五轴弯管数控缠绕机的结构主要由四大部分组成：缠绕小车、小车底座、机头装置和尾架顶尖装置。其中缠绕小车机构是最为复杂的设计部分,在缠绕弯管过程中,小车要实现在底座上横向平移、纵向进给运动,丝嘴的旋转运动以及丝嘴在竖直方向上的垂直升降运动。在Pro/E中完成了缠绕机四个部件的设计,并分析了五轴的运动对于弯管芯模缠绕的作用,选择合理的传动方案实现五轴的联动。小车架上承受整个小车的重量,为防止严重变形现象的发生,影响缠绕机的正常工作,因此对小车架在ANSYS中进行结构刚度的分析。最后利用Pro/E中机构运动仿真模块Pro/Mechanism对弯管缠绕机的缠绕过程进行仿真。将二维图纸设计中很难表达的机构运动分析运用三维动画表达,使之变得非常直观、简捷高效。弯管缠绕机的运动仿真能够简化机构的设计开发过程,优化产品设计质量,缩短产品的整个开发周期。
[Abstract]:Composite bend pipe is a typical non-axisymmetric part. It is difficult to produce because of its many series of specifications and complicated shape and structure. The main factor restricting the development of FRP pipes is not the performance of the pipes, but the failure of the fittings of the pipes. At present, the production efficiency of composite bend pipe is low and the quality is difficult to guarantee. With the popularization and application of composite pipe in chemical enterprises, the amount of medium and small diameter bend pipe is increasing, so it is urgent to use machine to winding composite bend pipe to realize automatic production of bend pipe. Therefore, it is necessary to research and develop new winding technology, including the structure design of winding machine, the design and calculation of new stable fiber path, the winding mode design of non-axisymmetric body and so on. The difficulty of filament winding is the design of filament winding line. The design of standard filament winding rotary body has become mature, and there are still many difficulties in the study of non-rotating surface winding, such as the problem of overhead and the problem of unevenness of winding. The elbow consists of a cylindrical section and a ring section. This subject will use the geodesic line on the circular surface and the non-geodesic and curved spline on the cylindrical surface to generate the winding path of the bend pipe. By adding the entrainment at the end of the pipe to control the yarn drop point, the algebraic model of the winding of the bend pipe will be given. It can walk out of the stable winding line, prevent the phenomenon of sliding line, and realize the design and uniform covering of the winding track of the composite pipe. In this paper, a five-axis horizontal filament winding machine controlled by microcomputer is designed to realize winding of bend pipe. The structure of five-axis tube winding machine is mainly composed of four parts: winding trolley, base, head device and tail frame center device. The winding mechanism is the most complex part of the design. In the process of winding the winding pipe, the vehicle should realize the lateral translation on the base, the longitudinal movement of feed, the rotation of the thread tip and the vertical lifting movement of the tip in the vertical direction. The design of four parts of winding machine is completed in Pro/E, and the effect of five-axis motion on winding of pipe core die is analyzed, and a reasonable transmission scheme is selected to realize the linkage of five axes. In order to prevent the serious deformation and affect the normal operation of the winding machine, the frame is subjected to the weight of the whole car. Therefore, the structural stiffness of the frame is analyzed in ANSYS. Finally, the winding process of the winding machine is simulated by the mechanism motion simulation module (Pro/Mechanism) in Pro/E. The mechanism motion analysis, which is difficult to express in 2D drawing design, is expressed by 3D animation, which is very intuitive, simple and efficient. The motion simulation of the winding machine can simplify the design and development process of the mechanism, optimize the quality of the product design, and shorten the whole development period of the product.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH136

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