这是一种用金属棒料锻制环形锻件的新方法。它一方面使金属材料受径向挤压而充填封闭型腔形成环形银件,同时又将锻件与棒材分离。这种方法能大大节省原材料。棒料送至挡料器,并在可分凹模2中被夹紧,当冲头向下行程时,将金属挤入环形腔A(见图a左)。由于冲头单方向施加变形力,变形腔A的a部易于充填,而b部则 This is a new method of forging ring-shaped forgings with metal bars. On the one hand, the metal material is squeezed radially to fill the closed cavity to form a ring-shaped silver piece, and at the same time, the forging piece is separated from the bar piece. This method can greatly save raw materials. The bar is fed to the stopper and clamped in the split die 2, pushing the metal into the annular chamber A when the punch travels down (see left of Fig. A). As a result of unilateral imposition of the punch deformation force, a deformation of the cavity A easy to fill, and b Department then