Forming mould for composite-material fan blade of aero-engine

Abstract

The invention discloses a forming mould for a composite-material fan blade of an aero-engine. A blade body mould of the forming mould is an open mould; and a tenon root lower mould and a tenon root upper mould are closed moulds. A complex free curved surface which is thick in middle and thin in two sides is formed on the surface of the blade body mould by taking a direction from the blade tenon root to the blade tip as an axis; a groove for limiting the tenon root lower mould is formed in the middle of a convex section at the tail end of the blade body mould; a lug boss which is matched with the groove in the tail end of the blade body mould is arranged on the lower end surface of the tenon root lower mould; the tenon root lower mould and the blade body mould are limited and fixedly connected by flanging lining sleeves, dowel pins and bolts which are symmetrical distributed; and the tenon root upper mould and the tenon root lower mould are limited and fixedly connected by virtue of a lining sleeve, a tapered dowel pin and a bolt. The blade body mould, the tenon root lower mould and the tenon root upper mould are coaxially mounted. The forming mould is simple in structure and convenient in dismounting, and capable of being repeatedly used for many times while the production precision of the forming mould is not affected. The forming mould for the composite-material fan blade of the aero-engine not only can improve the processing efficiency of the composite-material fan blade, but also can reduce the production cost of the composite-material fan blade.

Description

technical field [0001] The invention relates to the technical field of structural design and manufacture of aeronautical technology equipment, in particular to a metal mold for precision manufacturing of composite material fan blades of aero-engines. Background technique [0002] In the aviation industry, the widely used engines are mainly turbofan engines. Engine blades are thin-walled structural parts with complex free-form surfaces, and the design requires high precision and light weight. Especially when the fourth-generation aero-engine requires a higher thrust-to-weight ratio, traditional metal materials are far from being able to meet its requirements, and even lightweight metal materials such as titanium alloys have been unable to do what they want. Therefore, there is an urgent need for a lighter material with good physical and chemical properties to replace the existing materials. The increasing maturity of carbon fiber reinforced resin matrix composites has broug...

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Problems solved by technology

Moreover, carbon fiber reinforced resin-based composite materials are difficult to process materials, and the existing CNC machining technology is difficult to process fan blades that meet the requirements of aero-engine composite materials; It is of great significance in the development of a new generation of high thrust-to-weight ratio aeroengines to produce a carbon fiber reinforced resin matrix composite fan blade mold that meets the requirements to improve production efficiency and reduce production costs

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