弯曲是压制成形中最为普遍的成形方法之一,弯曲模也是常用的模具形式之一。通常说来,弯曲模的结构并不复杂,但在弯曲成形中要得到完全符合要求的零件却甚为困难,因为弯曲和任何塑性变形一样,都伴随有弹性变形,外载荷去除后,板料产生弹性恢复,其形状和尺寸都发生与加载时变形方 Bending is one of the most common forming methods in press forming. Bending dies are also one of the commonly used forms of dies. Generally speaking, the structure of the bending die is not complicated, but it is very difficult to obtain fully satisfactory parts in bending forming because the bending is accompanied by elastic deformation like any plastic deformation. After the external load is removed, Produce elastic recovery, the shape and size of deformation and loading occurs