The Theoretical Research On Drawing Process Of Camber Die And Its Software

In this thesis, the basic aspects about forming process of camber die are studied with method of theory . The pattern of camber die-drawing are optimized. The physical innate character of drawing with camber die is analyzed thoroughly. For the first time, the periodically relation of the limit drawing coefficient and the large longitudinal stress in dangerous section is established. Furthermore, the rationale to judge limit transform degree is developed. Then, the limit drawing coefficient of drawing with camber die is proposed. On the criterion that the large stress in flange is smaller than that of limit value, the formula of drawing with camber die without wrinkles is deduced.Meanwhile, Based on the software platform of Visual Basic, the design software, which is used for drawing with camber die, is studied and developed. According to design route of the forming process of drawing with camber die, this software can be divided into 3 modules: the module of the chamber design, the module of process parameters design, the relative diagram of influence factor of limit drawing coefficient. In software, the geometry model of curve can be created according to the inputting information of material parameter, and module size. And the data of model are kept in database. Then the homologous craft parameter is calculated include limit drawing coefficient, forming depth, and limit forming load. At the same time, the reasonablality of forming process is judged. Finally, the diagram of limit drawing coefficient and its relative factor is displayed.The research works theoretically is based on the project for drawing with camber die which enriching and developing the foundation theories of blanking. Compared with even die-drawing, camber die-drawing's limit drawing coefficient is detracted, so efficiency is increased. Process parameters provide a reliable basis of process choice and establishment in producing.