Design And Simulation Of Filament Winding Pattern And Machine For Elbow

Elbow is a typical non-axisymmetric part. It is quite difficult to implement the automation of the producing process of elbow, because its specification series and shape structures are complex. The reason for the restriction of the development of glass fiber reinforced plastic pipes is not the pipes's performance, but the pipe's fitting cannot keep up. At present the production efficiency of compound materials elbow is low, and its quality is difficult to guarantee. With increasing use of the compound materials elbow in the chemical industry, the amount of small and medium caliber elbow is getting mpre and more.It is in need to achieve the automation of elbow's producing process. Therefore it calls for researching and developing new technologies which involve designing winding machine, the new stable fiber path of winding and calculation of non-axisymmetric winding model body design.The difficulty of filament winding technology is winding pattern design. It follows from production procedure that it is relatively easy to wind axisymmetric parts. However, there are still many difficulties for non-axisymmetric parts, such as the slant and overhead winding pattern design. The elbow is composed of the cylindrical section and torus segments. This thesis will use the geodesics on torus, semi-geodesics and surface spline on cylinder to generate the parths of filament winding. It could design and calculate stable fiber paths and prevent the phenomenon of slip by adding stop winding at the end of the elbow, controlling the doffing point and giving algebraic pattern.Therefore it is able to design the fiber path with uniform coverage.This paper will design a five-axis horizontal computer controlled filament winding machine to achieve elbow winding. Five-axis CNC winding machine is mainly composed of four parts:winding car, car base, head and tailstock devices. Winding car is the most complex part, because in the winding process, the car will achieve the horizontal motion, vertical feed motion, the rotation and the movement in the vertical direction. It has completed four components of the winding machine in Pro/E,analyzed the effects of the movement of five axis to wind elbow mandrel and chosen reasonable transmission schemes to achieve the movement of five-axis winding machine. The frame of winding car supports the whole weight of the car. To prevent the severe deformation which affects the normal operation of winding machine, therefore it requires analyze the rigidity of frame in the ANSYS. The simulation of the elbow winding machine can simplify the process of design, optimize product quality, shorten product development cycle.