Designing and manufacturing method of composite blade and composite blade

Abstract

The invention provides a designing and manufacturing method of a composite blade. Pre-forming sheets are paved on the two sides of a metal framework, and the composite blade of a sandwich structure isformed after curing compounding of curing equipment. Through the manner of manufacturing the composite blade through a composite of the pre-forming sheets, the manufacturing process can be simplified, cost can be reduced, and good integrity and bonding strength are achieved. The invention further relates to the composite blade. The composite blade comprises the composite and the metal framework.The metal framework is pre-manufactured to be in a blade shape, the pre-forming sheets formed by multiple layers of prepreg fiber cloth are paved outside the metal framework, through holes are formedin the metal framework, carbon fiber wiring harnesses used for fixing the metal framework and the pre-forming sheets on the two sides are wound in the through holes, and the composite blade is obtained through curing of the curing equipment. The composite blade has the advantage that the composite blade cannot be screwed or twisted or bent under the limiting condition, weather resistance is good,certain impact resistance is achieved, and the special requirements of aviation and ships can be met.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a design and manufacture method for a composite material blade and the composite material blade. Background technique [0002] Existing composite material power blades are generally combined, and the blades and hubs are prepared separately, and then assembled into one body by mortise joints or plug joints. The pure composite material is connected with the metal or composite material hub, and there is assembly stress, while the pure composite material is easy to fail from the stress concentration point, which affects the fatigue life of the composite material blade; the metal and composite material composite molding blade, experiences cold and heat cycles during work Finally, there are risks of delamination and debonding between the metal and the composite material, and even the separation of the composite material and the metal. [0003] No patent literature report on the same...

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Problems solved by technology

[0007] However, this patent only uses fiber cloth layer and resin to manufacture blades, and does not involve the composite of various materials including metal to manufacture blades, nor does it involve the problem of layered debonding between metal and composite materials

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