| Summary: | 碩士 === 南開科技大學 === 車輛與機電產業研究所 === 100 === To avoid wrinkling in traditional deep drawing process, a blankholder is used generally. But that will be more complicated in the dies construction, more high in the drawing load, more wear in the drawing die and easily fracture in the workpiece. Therefore, there are some advantages to a drawing process without the blankholder. In this paper, the finite element method is adopted to study the die shape design of a non-axisymmetric deep drawing process without the blankholder. A series of simulations on the non-symmetric deep drawing with a traditional die, a circular cone die, a die by sweeping the product profile along an oblique line, a die by sweeping the product profile along a tractrix curve and a die by sweeping the product profile along a reflection curve, respectively, using the program DEFORM 3D was carried out. The influences of the die parameters such as die angle, die length on the drawing load, the maximum tangential compressive stress of the workpiece, the maximum damage value of the drawn cup and the height distribution of the drawn cup are investigated.
|
|---|
