Composite manufacturing method of metal reinforcing edge of aero-engine fan blade

Abstract

The invention relates to a composite manufacturing method of a metal reinforcing edge of an aero-engine fan blade. The method comprises the following steps that a geometrical shape model of the metal reinforcing edge is determined according to the fan blade shape, then the two ends of the geometrical shape model extend, the extended geometrical model is divided into a first prefabricated part model and a second prefabricated part model, and a first prefabricated part and a second prefabricated part are obtained; the two ends of the fan blade shape extend to obtain a core mold model, then the core mold model is divided into multiple block models, and block pieces and a core mold are manufactured; the first prefabricated part and the second prefabricated part are attached to the two sides of the core mold, the core mold is fixed to the first prefabricated part and the second prefabricated part through pins, and an integral structure is formed; the integral structure is placed in a vacuum diffusion welding furnace for diffusion welding; and extension parts, provided with pins, at the two ends of the welded integral structure are cut off. Compared with the prior art, the method has the advantages that the material utilization rate is increased, the machining period is shortened, the cutting machining difficulty is greatly reduced and the like.

Description

technical field [0001] The invention relates to the field of manufacturing thin-walled deep cavity reinforcing edges, in particular to a composite manufacturing method for metal reinforcing edges of aeroengine fan blades. Background technique [0002] Due to the advantages of light weight, low noise, and strong anti-flutter performance, carbon fiber composite fan blades have become the mainstream choice for commercial aeroengines. However, the impact resistance, compression resistance and lightning strike resistance of the leading edge of composite material blades are still insufficient compared with metal blades, and by adding titanium alloy wrapping to the leading edge of composite material blades, the overall performance of composite material blades can be significantly improved. performance. [0003] In order to adapt to the shape of the leading edge of the composite fan blade, the titanium alloy reinforcement edge often has a complex deep-cavity thin-walled special-sha...

AI Technical Summary

Problems solved by technology

But there is following deficiency in this method: 1, the step is loaded down with trivial details, needs the preliminary welding for the first time and follow-up welding strengthening

At the same time, the prefabricated part needs to be welded by argon arc welding to form a sealed structure. The sealed structure includes two prefabricated parts, a mandrel, and two seals, etc. Since the mandrel, the prefabricated part and the sealing parts are made of different materials, the argon arc welding Difficulty welding

2. Welding reinforcement is carried out through the air pipe of the seal and the high-temperature pressure-holding device, which is basically difficult to achieve, and the quality of the connection interface cannot be guaranteed

3. It cannot be used to manufacture metal reinforcement edges with large length and deep thin-walled deep cavity

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