手推车轮箍(见图1)是个带宽凸缘的盆状零件,形状比较复杂,各截面的尺寸相差悬殊,变形程度又大,特别是凸缘部分所占的金属体积约为零件总体的三分之一。无论从形体特征上,还是从变形量分配以及材料体积的转移方面进行考虑,该零件非一次成型能够完成,故采取了多道成型工序,并把挤压同镦粗两种变形方式结合在一起。 Wheelbarrow wheelbarrow (Figure 1) is a flange with a width of the basin-shaped parts, the shape is more complex, the size of each section vary greatly, the degree of deformation and large, in particular, the flange part of the metal volume is about three parts of the overall one. Regardless of the physical characteristics, or from the distribution of deformation and material volume transfer considerations, the non-forming parts can be completed, it took a number of molding processes, and extrusion and upsetting the two deformation together .