Shape control method for large-curvature hybrid structure part

Abstract

The invention provides a shape control method for a large-curvature hybrid structure part. The shape control method comprises the following steps: analyzing the shape of the part; a forming tool design parameter selection step: carrying out simulation analysis, determining a possible out-of-tolerance area and an out-of-tolerance range in the part shape, and determining the design parameters of a forming tool; the forming tool is manufactured, specifically, the forming tool is manufactured, and an adjustable point is arranged at the position, corresponding to the possible out-of-tolerance area of the part, of the molded surface of the tool; an adjustable tool is designed and manufactured; a part forming step: adjusting a tool molded surface into a theoretical molded surface, and forming the part; controlling the shape of the part, namely detecting and analyzing the obtained shape of the part, finding out an out-of-tolerance area and an out-of-tolerance range, adjusting an adjustable point, corresponding to the found out out-of-tolerance area, of the molded surface of the tool, molding the part again, then detecting and analyzing the shape of the manufactured part, and adjusting the molding tool, so as to obtain the shape of the part. And iteration is repeated until the tool molded surface completely meeting the part appearance requirement is obtained.

Description

technical field [0001] The invention relates to the field of composite material molding, in particular to a method for controlling the appearance of large curvature hybrid structural parts. Background technique [0002] In the field of aviation manufacturing, leading edge parts generally adopt a U-shaped large curvature structure. Among them, shape control is one of the biggest technical difficulties in the manufacturing process of large curvature structural parts. [0003] In this regard, in Patent Document 1, a manufacturing process method for a large-curvature full-profile thin-walled plate is provided, including the following steps: (1) rough machining of the outer cavity profile; (2) rough machining of the inner cavity profile; (3) Natural failure; (4) Flattening to eliminate deformation, and expanding and reaming process holes; (5) Semi-finishing and finishing of the inner cavity profile; (6) Filling gypsum; (7) Semi-finishing and finishing of the outer cavity profile...

AI Technical Summary

Problems solved by technology

However, due to the inconsistent thermal expansion coefficients of metal and composite materials, the deformation trend of the parts after bonding is not easy to predict, and the appearance and internal quality cannot be guaranteed simply by later machining

Moreover, for the manufacture of hybrid structural parts of metal and composite materials, due to the inconsistent deformation trends of metal and composite materials, it is difficult to find a consistent method only by mechanical processing and material properties, and the processing process will also cause irreversible damage to the internal quality of the parts

At present, the molding of hybrid structure parts generally adopts the method of female molding, but because the deformation trend of the parts is not clear, the appearance requirements of the parts can only be met by repairing the mold and repeated iterations

This method has high cost and long period, and there is great uncertainty in mold repair, which leads to the appearance of parts exceeding the specified appearance requirements

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