1 前言在众多的制造工艺中,金属板料的冲压工艺占有特殊的地位,因为它能制造出各种复杂形状的另件,而消耗的材料却最少。在板料冲压时,首先关心的问题是板料能否实现所需的变形而不破损,这首先取决于板料的成形性能,其次取决于变形条件。为了测定板料的成形性能,世界各国已先后提出了几十种深冲判据。 2 苏联的深冲判据F_(83) 1 Introduction In many manufacturing processes, the sheet metal stamping process occupies a special position, because it can produce a variety of complex shapes of other pieces, and consume the least amount of material. The first concern in sheet metal stamping is whether the sheet material can achieve the desired deformation without damage, first of all depending on the sheet formability and secondly on the deformation conditions. In order to determine the formability of sheet metal, the world has put forward dozens of deep-sea criteria. 2 Submerged Criteria for the Soviet Union F_ (83)