A method for manufacturing a pre-forged blank of a forged blade

Abstract

The invention discloses a manufacturing method of a pre-forged billet of a forged blade. By adopting double-ellipse and middle-arc-transition design on a blade body moulding surface of a pre-forged piece, the shape of a blade body of the pre-forged piece is similar to that of a blade body moulding surface of a finished forged piece, and the flow resistance of a metal material in a mould cavity isreduced in the finish-forging process, so that the fullness of the finish-forging mould cavity is facilitated, and the blade size can be ensured. The contact area between the surface of the pre-forgedpiece and the surface of the mould cavity is small, so that the situation that temperature reduction of the pre-forged piece is too fast is avoided, the forging temperature is ensured, the metal flowresistance is reduced, the pull damage to the moulding surface of a finish-forging mould can be avoided, the blade surface quality is improved and the life of the finish-forging mould is prolonged. Astable forging temperature has a certain function on the improvement of a metallurgy structure of the forged piece. The mold splitting forms of an air inlet edge and an exhaust edge of a blade root transition connection part of the pre-forged piece are basically consistent with the mold splitting form of the forged blade, so that forging folds and flaws at the blade root transition connection part of the forged blade are avoided, the longitudinal flow line of the forged blade can be improved advantageously, and the mechanical property of the forged blade can be improved advantageously.

Description

technical field [0001] The invention belongs to the field of blade forging, and in particular relates to a method for manufacturing a pre-forged blank of a forged blade. Background technique [0002] The pre-forging process is one of the very important pre-forming billet-making processes for the hard-to-deform alloy forging blades. This process can provide a good blank distribution for the final forging process and meet the forming requirements of the final forging process. [0003] Schematic diagram of the cross-section of the final forged blade with a crescent-shaped transverse section. For such a blade with a large change in the transverse section of the blade, the cross-sectional shape of the pre-forged airfoil in the original design is a single elliptical shape. This pre-forging structure design method has the characteristics of simplicity and quickness, but there is a large difference in the shape of the inlet and outlet edges of the pre-forging blade root and the fina...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above disadvantages and provide a method for manufacturing pre-forged blanks of forged blades, which can not only solve the matching problem of the dies in the final forging process, but also improve the longitudinal streamline of the forged blades, and at the same time increase the service life of the final forging dies and blade dimensional accuracy and surface quality

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