The Forming Simulation Of The Parabolic Reflector Antenna Surface

The surface of the parabolic reflector antenna is the most important part in receiving microwave signal. Furthermore it is very significant of its smoothness and the average deviation for the surface when in receiving microwave signal. Only the smoothness and the average deviation of the surface satisfied with the technical specification can we obtain a good result. It is very difficult to obtain a satisfied face because of its small curvature and lower depth. It is easy to bring about springback and wrinkle on the part when in pressing. And it is a very difficult problem to solve. There is not an appropriate way to resolve such problem until now. It is always to get the structure of the mould and the technical scheme after a great deal of pressing experiments.It will cost a lot of time and money to deal with this kind of complex problem depending on the traditional design method. With the development of metal plasticity forming technology, it is possible to carry out the plastic forming process with numerical simulation. So that we can realize the defective position in the plastic forming process in advance according to the computer simulation result. As a result, the structure of the mould and the technical scheme will be improved. At the end, the quality of the product is improved greatly and the period of development is decreased greatly.The finite element numerical simulation software DYNAFORM has been used in this paper. Combine with the metal plasticity forming theory and elastic-plastic finite element theory, the forming process of the reflected face of the parabolic reflector antenna has been researched. When in simulating the face, adopting the approach of connecting the metal plasticity forming theory with the manufacture experiences, the metal flowing process and the stress distributed characteristics is researched. At the same time, the specialty and location of defect is analyzed. On the base of the analyzed result, we design the shape and the position of draw bead. After stamping simulation, the springback simulation begins. Through the springback simulation, the average deviation for the surface is obtained. According to the sheet metal forming process simulation, an appropriated roller radius of the matrix, the draw bead dimension, draw bead shape and position are put forwarded. We also gain the feasible technical scheme and the blank shape.