Composite material precision molding tool for airplane and precision molding manufacturing method

Abstract

The invention relates to a composite material precision molding tool for an airplane and a precision molding manufacturing method. In a single large-scale part composite material molding process, the size precision is affected by many factors such as a mould material and structure, a composite material laying angle, layers and curing processes. The composite material precision molding tool provided by the invention comprises a set of special mould for test piece preparation, a test piece, an easy molding mould, a thin-shell mould and the like; the composite material test piece is prepared on the special test piece preparation mould, a transformative database is built by analyzing the transformation rule of the test piece, and a product digital model is converted into a process digital model by compensating molding errors by using CATIA software. According to the process digital model, a molded surface of the thin-shell mould is manufactured on an easy molding mould transition tool, and the composite material product is manufactured by utilizing the molded surface of the thin-shell mould, so that the molding quality and accuracy of the composite material can be improved, the design difficulty of the molded surface of the mould and the mould manufacturing cost are reduced, the thermal capacity of the mould is effectively reduced, and the optimization of curing reaction is facilitated.

Description

technical field [0001] The invention relates to a precise forming tooling of composite materials for aircraft and a precision forming manufacturing method. Background technique [0002] At present, the molding method of composite material parts mostly adopts autoclave curing molding, and its manufacturing process is generally to design and manufacture molding molds according to product digital models; and then use the molds to manufacture composite material products. According to this process, the accuracy of composite parts depends to a large extent on the accuracy of the molding die, and since there are many factors affecting the accuracy during the molding process of composite materials, it is difficult to design the mold without corresponding data support. Reasonable design of the mold surface leads to a large error between the composite material product and the original digital model, which affects its use; the production of aircraft is a large-scale single-piece produc...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the molding process of aircraft composite materials, there are many factors affecting its dimensional accuracy, and the influencing mechanism is complicated, such as mold material and structure, composite material layup angle, number of layers and curing process, etc. , and aircraft composite materials and manufacturing composite material tooling are all large-scale single-piece production, and the deformation rules of composite material parts cannot be obtained through mass production. The influence of the accuracy of the parts has not been well resolved, which affects the accuracy of the composite material parts. The invention provides a precision molding tooling and a precision molding manufacturing method for aircraft composite materials. The digital model of the product can be corrected by the test piece data, which can compensate The amount of deformation in the manufacturing process of composite parts, and the use of thin-shell mold surfaces effectively reduces the heat capacity of the mold, which is conducive to optimizing the curing reaction, reduces the cost of mold manufacturing, improves the dimensional accuracy of composite products, and achieves the purpose of precise molding

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