胀径是筒形件变薄旋压经常遇到的难题之一。其主要表现为旋压件直径扩大,形成喇叭形、腰鼓形、葫芦形及椭圆等畸变,严重影响零件精度,因此寻求影响胀径的因素和控制方法便成为广大旋压工作者共同关心的问题。变薄旋压是一种局部三维变形,变形区无论就旋压件整体还是某一截面来说都是很小的一点(图1)。材料被强制沿周向进入 Bulging is one of the problems often encountered when thinning a cylinder. The main performance of the Spinning Pieces to expand the diameter, the formation of trumpet shape, waist drum shape, gourd shape and ellipse distortion, seriously affecting the accuracy of the parts, so seeking to affect the bulging diameter of the factors and control methods have become the majority of spinning workers are of common concern . Thinning spinning is a partial three-dimensional deformation, the deformation zone is a small point either in terms of the overall spinning or a certain section (Figure 1). Material is forced into the circumferential direction