A Combined Die for Making Carbon Fiber Reinforced Wrinkled Sandwich Cylindrical Shell

Abstract

The invention provides a combined die for preparing a carbon-fiber-reinforced fold sandwich cylindrical shell. The combined die comprises a core forming die body, a panel forming die body and a solidification die body; the core forming die body comprises a male die and five female dies, the male die is one quarter of a round ring, the inner wall of the male die is provided with a plurality of equal quadrilateral units, five quadrilateral units are arranged in the axial direction of the male die, three quadrilateral units are arranged in the annular direction of the male die, the five female dies are arranged side by side, and the quadrilateral units on the female dies are in complete occlusion with the quadrilateral units on the male die; the panel forming die body comprises an inner die, a middle die and a base, and the middle die and the inner die are arranged in a concave arc in sequence from inside to outside; the solidification die body comprises an inner support and an outer support, the outer support is formed by buckling two same semi circular rings, and the radius of the outer support is the same as that of the concave arc; and the core forming die body, the panel forming die body and the solidification die body are arranged in sequence. The combined die is used for preparing the carbon-fiber-reinforced fold sandwich cylindrical shell.

Description

technical field [0001] The invention relates to the technical field of composite material molding, in particular to a combined mold for preparing a carbon fiber-reinforced pleated sandwich cylindrical shell. Background technique [0002] When the sandwich structure is applied to aerospace structures such as aircraft fuselage load-bearing tubes, fairings, engine casings, and interstage sections, it needs to be prepared as a curved surface or cylindrical shell structure. At present, the cylindrical shells used in large aerospace structures are mainly reinforced cylindrical shells, honeycomb sandwich cylindrical shells, etc. But it has unavoidable disadvantages: (1) The molding process of composite material reinforced cylindrical shell is mainly fiber winding method, the preparation process is complicated, the molding quality is uncontrollable, and the process cost is high; (2) The closed internal structure is easy to accumulate Condensed water, which is not conducive to heat ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that there is no process for preparing a pleated sandwich cylindrical shell at present, the present invention proposes a combined mold for preparing a carbon fiber reinforced pleated sandwich cylindrical shell

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