杯形件的单道次拉深旋压成形工艺研究

Study on one-pass deep drawing spinning of cups

研究了杯形件单道次拉深旋压成形工艺的变形特点 ,试图替代传统的拉深成形工艺和多道次旋压成形工艺 ,以达到减少产品的加工工序、降低产品的生产成本。研究结果表明 ,在旋压成形的初期 ,轴向旋压分力大于径向旋压分力 ,而在旋压后期 ,轴向旋压分力则小于径向旋压分力。除了工件口部之外 ,其它部分的名义厚度应变ε的变化规律与普通拉深的情况相似。

This paper deals with an investigation into the characteristics of the one-pass deep drawing spinning of cups in order to replace the traditional deep drawing and multi-path spinning processes, so that the working procedures and the manufacturing costs can be reduced remarkably. Forming conditions studied in this paper are the material property, the feed rate of the roller per revolution .f., the nominal deep drawing ratio .m., and the relative clearance between the roller and mandrel .δ.. It is thereby shown that the axial components of the spinning force .Pa. is larger than the radial components of the spinning force .Pr. in the initial stage of the forming, and reverse is true in the later stage. The variations of the nominal thickness strains .ε. are similar to those in the ordinary deep drawing except the area near the cup opening. The forming limit diagrams and the ranges of the successful spinning for various process parameters are obtained also in this paper.