Push-bending forming process for hollow blade

Abstract

The invention discloses a push-bending forming process for a hollow blade. The process comprises producing a mould cavity curved surface according to a finished product hollow blade appearance curved surface; machining a mould according to the mould cavity curved surface and forming a mould cavity passage with two open sides in the mould; designing a chuck according to the blade tenon shape; fixing the chuck and the mould on a hot press; coating high-temperature lubricants on the inner surface of the mould cavity and the surface of a blade blank; mounting the blade blank on the chuck. The hot press acts, the mould is closed, the chuck drives the blade to move towards the mould to push the blade into the mould cavity from one end of the mould cavity passage, and the blade is forced to be bent under the action of the mould cavity inner surface and is subjected to torsional deformation; the mould is opened after the torsional deformation is kept for certain time, and the formed blade is dismounted. According to the process, slab hollow blade blanks can be formed into complex torsional forms and are provided with required torsion angles, the forming process is stable and convenient and fast, the speed is controllable, deformation distribution of all parts are uniform, and the production efficiency is high.

Description

technical field [0001] The invention relates to a push-bending forming process for hollow blades, which is used for forming blades with complex torsion angles, especially hollow blades. Background technique [0002] In order to meet the requirements of the aerodynamic shape of the compressor blades used in various aero-engines, the shape of the blades often has complex twist angles. This distorted curved surface shape brings great difficulties to the processing and manufacturing of the blade. Especially for blades with a hollow weight-reducing structure, the weight-reducing part is hollow inside, and the outer panel is a thin plate with a small thickness. The panels are only supported by stiffeners in local areas, and most of them are suspended. Due to its structural characteristics during the bending and torsion forming process of this type of blade, on the one hand, the torsional stiffness suddenly changes at the junction of solid and hollow, and on the other hand, its i...

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Problems solved by technology

[0004] The invention provides a new hollow blade push-bending forming process, which overcomes the problems of the existing hollow blade torsion forming process, such as unstable effect, complicated equipment, and many defects after forming, greatly improves product quality, and increases production efficiency; At the same time, the hollow blade push-bending forming process of the present invention can form a flat hollow blade blank into a complex twisted shape, so that it has the required twist angle, the forming process is stable and convenient, the speed is controllable, the deformation of each part is evenly distributed, and the production efficiency is high.

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