초록 ▼

A process for forming an aircraft control surface in the form of a spoiler from a fiber/resin composite is disclosed. The trailing edge is compression molded by applying pressure on the mold. The leading edge is thick walled in the form of a torsion box and is molded by an internal pressurizable bla

A process for forming an aircraft control surface in the form of a spoiler from a fiber/resin composite is disclosed. The trailing edge is compression molded by applying pressure on the mold. The leading edge is thick walled in the form of a torsion box and is molded by an internal pressurizable bladder.

대표청구항 ▼

[ What is claimed is:] [1.]1. A process for manufacturing an aircraft spoiler control surface of a generally elongated shape with a teardrop cross-section with a thick leading portion and a thin trailing portion joined by a middle tapered portion, the process comprising:providing a female mold with

[ What is claimed is:] [1.]1. A process for manufacturing an aircraft spoiler control surface of a generally elongated shape with a teardrop cross-section with a thick leading portion and a thin trailing portion joined by a middle tapered portion, the process comprising:providing a female mold with a lower half and an upper half, with an elongated molding cavity dimensioned essentially the same as and corresponding to outer surfaces of the elongated shape and extending in the direction of a longitudinal axis, with a corresponding leading portion, a tapered portion and a trailing edge portion;placing a lower layer of multiple plies of resin impregnated fiber into the lower half of the female mold with a leading lateral edge in the leading portion, and a trailing lateral edge in the trailing portion;wrapping multiple plies of resin impregnated fiber around a flexible, pressurizable bladder;placing the wrapped bladder in the mold over the lower layer in the leading portion of the cavity;placing the rigid mandrel in the mold over the lower layer in the tapered portion with the rigid mandrel and the wrapped bladder extending adjacent to one another and extending generally parallel to the longitudinal axis of the cavity;placing a upper layer over the wrapped bladder and the mandrel with a leading lateral edge in the leading portion and the trailing lateral edge in the trailing portion, and with the upper and lower layers overlapping at their leading lateral edges, and their trailing lateral edges adjacent to each other at the trailing end;closing the female mold by placing the upper half over the lower half, such that the upper and lower layers are adjacent to inner molding surfaces of the cavity, the wrapped bladder extends through the leading edge portion of the cavity, the mandrel extends though the tapered portion of the cavity,the plies of the upper and lower layers, and the plies wrapped around the bladder having fibers extending a generally +45.degree. and a -45.degree. orientation with respect to the longitudinal axis;applying pressure upon the mold halves to compress that portion of the plies in the upper and lower layers adjacent to the mandrel between surfaces of the mandrel and surfaces of the cavity in the tapered portion, and to compress that portion of the plies in the upper and lower layers in the trailing portion between molding surfaces of the upper and lower halves of the mold,pressurizing the bladder to compress that portion of the plies wrapped around the bladder and adjacent to the mandrel against the mandrel, compress that portion of the plies of the wrapped bladder adjacent to the upper and lower layers with said portions of upper and lower layers against surfaces of the cavity in the leading edge portion, andheating the mold to cure the resin in the plies during the applying of the pressure on the mold and the pressurizing of the bladder;opening the mold and removing the cured part;removing the bladder from the interior of the leading edge portion;removing the mandrel from the interior of the tapered portion to provide the final cured pall in the form of torsion box with a leading portion cavity in the leading portion provided by the bladder and a tapered portion cavity in the tapered portion provided by the mandrel with an inner or spar wall separating the leading portion and tapered portion cavities, the cured upper and lower layers of plies providing outer surfaces of the part, the cured plies that were wrapped around the bladder providing a thickened outer wall of the leading portion adjacent lateral edges of the upper and lower layer providing the thin trailing portion.