Some advanced plastic processing technologies and their numerical simulation

The development of aero-space, automobile, and high-technology industries requires the development of advanced plastic processing technologies in order to manufacture parts with light weight, high strength, high precision, high efficiency and at low cost, with a short period and a friendly environment, and with intellectualization and digitization. There are key problems urgently to be solved in the research and development of advanced plastic processing technologies, and FEM numerical simulation in combination with physical modeling and theoretical analysis has been playing a more and more important role in this field. This paper reports the state-of-the-art of some advanced plastic processing technologies and their numerical simulation in the authors' laboratory, including the unequal deforming and in-plane bending process of strip metal, free deformation under dieless constraint and axial compressive precision forming process of tube, wrinkling and spring-back prediction and the NC bending precision forming process of thin-walled tubes, and precision forming laws and a complicated massive forming process such as blade forging with a damper platform.