The Research On Virtual Five-Axis Fiber Placement Machine And Its NC System

Fiber placement technology place the tape, which was heated into a cerain temperature by heating device, into mold with certain pressure by using the roller on placement head. Derived from manual placement several decades before, Currently fiber placement technology has developed into a new type automatic composite material manufacturing technology. Compared to fiber winding technology, it shows more adaptability to more complex curved surface. Due to higher strength to mass ratio, fatigue endurance and shock absorption, it serves as a extremely decent way to produce high strength but low mass products. However, as it would cost more, this techonology was only confined to military, aviation and aerospace field. With the development of technology, its expense was decreasing a lot. By now, fiber placement technology was widely used in developed countries, while it was on the preliminary stage in home.This thesis did some research on virtual five-axies placement machine and its numerical controlling system. And the principal works contain the following parts.Firstly, it establishes a three-dimension model for placement machine. It was consist of rails, portal frame, trolley, placement hand and placement head. In order to realize impelling the model to move via NC code, the system also devise a coorination system for model. On account of manifesting the mechanical motion process of the model, the system stripped some small components of the real placement machine.Furthermore, the research on virtual model arithmetic can be divided in to categories. First, the research on virtual model movement, which cosist of five axies linkage movement arithmetic, model accelerate-decelerate movement arithmetic. What's more, the research on virtual placement numerical controlling sysem arithmetic, we add a NC code trasforming module, so that the system can accomplish reading, trasforming and propelling the model to move. Throgh the the interface of the system, we can input some NC code in txt format into the system,then run the program. The program can extract important data from the NC code and calculate the point coodination for late using. Afterwards, the system would continue flushing the screen by using the data prepared before to renew the positon of the model, so that to realize the movement of the model.Eventually, this system was supposed to show the quality of placement, that is to draw fiber placement track. Extracting some useful information from the NC, though certain algorithem, the system can calcualte the point information for drawing the fiber track.This thesis take advantage of OpenGL to establish a virtual five-axies placement machine. With the help of VC++, it designed a human-computer interface and realize the algorithm of linkage of virtual movement. And it built a virtual numerical module to accomplish NC code input, translation, extraction and process, and gain the data for placement process motion and illustrate placement process and placement track. This thesis focus on the development of designing a set of flexible virtual placement system and provide a foundmental virtual placement test platform.