Tooling positioning method for bonding and co-curing of composite materials

Abstract

The invention relates to a method for positioning composite material bonded and co-cured tooling, which can be used for positioning two cutting blades with a relative location relationship. The method comprises the following steps: (1) putting a cured molding part on a support frame made from a common steel material; (2) manufacturing a set of positioning plate by invar, positioning clamping-positioning mechanisms of the cutting blades on the invar positioning plate and simultaneously ensuring the location accuracy of the two clamping-positioning mechanisms; (3) forming a round hole in one end of the invar positioning plate and forming a long-strip-shaped hole in the other end of the invar positioning plate; (4) putting the invar positioning plate on the molding part according to the to-be-cured parts of the cutting blades, wherein the round hole of the positioning plate is connected with the molding part in a positioning way, the long-strip-shaped hole of the positioning plate is connected in a limit way by a pin and the length of the long-strip-shaped hole is greater than the amount of thermal expansion; and (5) integrally positioning the cutting blades to the cured molding part and then performing autoclave curing molding. Through the method, the main relative location relationship of the bonded parts can still be ensured even if a cheap common steel material is used by the composite material bonded tooling.

Description

technical field [0001] The invention relates to a tooling positioning method for composite material bonding and co-curing, and belongs to the technical field of composite material processing and molding. Background technique [0002] The process methods of forming reinforced wallboard parts in autoclave mainly include co-curing, bonding and bonding co-curing technology. With the support of technology and manufacturing progress, in the design of panel parts, many composite parts such as shear sheets with high positioning requirements are added on the basis of skin and stringers. Most of the shearing pieces are perpendicular to the girders or have a certain angle with the girders. Because the shearing pieces generally have an assembly relationship, the relative positional relationship between them is relatively high, mainly reflecting the length direction of the siding parts. . The shear sheet bonding with high positioning requirements needs to be manufactured by adhesive co...

AI Technical Summary

Problems solved by technology

However, the material cost of Invar steel is high. Although it has been widely used in the aviation field, it only accounts for less than 1% of the total composite molding tooling. Most of the smaller composite tooling still use ordinary steel materials.

Therefore, when encountering wallboard parts with shearing pieces, it is necessary to manufacture an additional set of Invar steel bonding and curing tooling, and the cost pressure is relatively high.

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