초록 ▼

An apparatus for bonding together into a composite structure parts having different coefficients of thermal expansion by use of an adhesive which cures at a curing temperature different from the use temperature at which the structure is to be used, including the steps of applying the adhesive in an

An apparatus for bonding together into a composite structure parts having different coefficients of thermal expansion by use of an adhesive which cures at a curing temperature different from the use temperature at which the structure is to be used, including the steps of applying the adhesive in an uncured state to the parts, then affixing the parts together rigidly at the use temperature to form the composite structure prior to curing the adhesive, then curing the adhesive at the curing temperature while keeping the parts affixed together and simultaneously permitting the composite structure to change shape in accordance with the different coefficients of thermal expansion of the parts, the latter step being accomplished by holding the composite structure in a fixture which includes clamping plates which prevent twisting and buckling of the composite structure as its temperature is changed and in which the clamping plates are mounted so as to permit them to shift position to accommodate the bowing of the composite structure resulting from the different expansion coefficients of the parts which are affixed together.

대표청구항 ▼

A fixture referenced to an XYZ orthogonal coordinate system for clamping the component parts of a rotor blade assembly during a bonding process, said rotor blade assembly having a long axis, a leading edge and a trailing edge parallel to said long axis and skins extending between said leading edges,

A fixture referenced to an XYZ orthogonal coordinate system for clamping the component parts of a rotor blade assembly during a bonding process, said rotor blade assembly having a long axis, a leading edge and a trailing edge parallel to said long axis and skins extending between said leading edges, comprising: a frame; a plurality of clamp means for suporting said rotor blade assembly with said long axis initially in substantial alignment with the Y-axis, said leading and trailing edges being substantially contained in the X-Y plane, and said clamp means exerting compressive force upon said assembly directed generally along said Z-axis; means constraining said clamps against rotation about said Y-axis, each of said clamp means being mounted to said frame for movement along said X-axis in response to the warping of said rotor blade assembly during the bonding process.