Review on intermittent local loading forming of large-size complicated component: deformation characteristics

Intermittent local loading forming is an important aspect of less-force plastic forming technologies. It has many advantages such as high flexibility of the forming process, multiplicity of loading way, and multiple controllable degree of freedom, and thus it shows a good prospect of application in plastic forming for an irregular integral component with a large-size and complicated structure, such as the large-size rib-web integral component. Up to now, the intermittent local loading methods used to manufacture a large-size complicated component can be classified into three categories such as local loading by simple punch, local loading by bolster plate, and local loading by partial die. The state-of-art of three local loading processes was summarized from four aspects such as actualization in industry of local loading process, loading state and metal flow during local loading process, influence of friction on local loading process, and defect and control during local loading process.