LARGE-SIZE SHAFTS FORGING METHOD Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: large-size shafts forging method provides for blank heating and its deformation. Butt of forged piece in process of deformation is made conical with angle of cone vertex of 50 - 165 deg. . Then forging is cooled to temperature of no less than Ar₁. Corrosion is removed from conical surface. Next blank is set on vertex of the forging and it is deformed at degree of no less than 25 % till required diameter is produced. Then the cycle is repeated. Shaft manufacturing from smaller blanks excludes usage of large-size castings and improves processing of metal structure, especially of forging axial zone. Cooled conical vertex provides partial drifting of each next blank. EFFECT: large-size shaft forging method is used in mechanical engineering. 6 dwg