Experimental definition of the optimum scheme of shaping forged impellers by high-speed forging

Abstract

Three schemes of high-speed forging of impellers are investigated. For the manufacturing of large-sized impellers with radial location of blades the scheme with application of concentrated (local) loading is recommended. The scheme possesses the following advantages: it decreases the deformation work; increases the nomenclature of details made with the existing equipment; increases die block wear resistance and the accuracy of the geometrical sizes of blades. The high speed metal flow at the final stage of forging improves the fill ability of radial channels of dies and accordingly raises the accuracy of blade shape.