Irregular cambered surface airway cascade forming method

Abstract

The invention discloses a method for forming an irregular cambered surface air passage cascade. The method comprises the following steps: 1) preparing a mold; 2) manufacturing a silicone rubber core mold; (3) paving warp-wise grid bars; (4) paving the weft-wise grid bars; 5) closing the mold and injecting glue; and (6) demolding and machining. According to the method, the weft grids and the warp grids are separately paved, the warp grids are paved into the PPRTM glue injection forming mold in advance by utilizing the grid paving mold to form the required shape, and the weft grids are directly paved on the surface of the silicon rubber core mold and then are loaded into the PPRTM glue injection forming mold together with the core mold, so that the use amount of raw materials is reduced, the paving process is optimized, the manufacturing period is shortened, and the production efficiency is improved. And the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for forming a leaf shank, in particular to a method for forming a blade cascade of an irregular cambered airway. Background technique [0002] Blade cascade is a common exhaust device in aero-engine thrust reversers. Generally speaking, it refers to the structural member that uses airflow to reverse the speed of the aircraft after landing. The early thrust reverser cascades were all made of metal materials by machining, casting, mechanical connection and welding. However, due to the high metal density and many parts, they accounted for a relatively large proportion of the weight of the engine. With the development of new materials, composite materials were applied to the cascade in the later stage. [0003] At present, most of the existing composite blade cascade manufacturing process methods are realized by molding and RTM glue injection process. What these two processes have in common is the extremely complex and l...

AI Technical Summary

Problems solved by technology

The common point of these two processes is that the mold design is extremely complex and the number is large

The metal molds used by conventional molding and RTM are difficult to be used in the manufacture of regular curved airway cascades, and the composite products manufactured by conventional molding and RTM processes have high porosity and poor mechanical stability of the cascades

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