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In this paper, a kind of mathematic method for optimizing stretching process of large forgings is proposed. Distributions
of effective strain within forged ingots is described by a Gauss function, which is obtained from the simulation of flat-anvil
stretching process. Successive stretching is expressed by the superimposing Gauss functions. Optimized stretching process,
with both homogeneous and certain strain in the center of forgings, is presented by derivation of this function. The relationship
between effective strain and the values of feed is obtained during the successive stretching with a rotation angle of 90°
and a feed displacement of 1/2 anvil width. The optimization result is verified by finite element simulation. Optimized value
of feed obtained using this method can ensure both uniformity and forging penetration. It provides mathematic model and theoretic
basis of optimizing large forging stretching process. 相似文献
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