초록 ▼

An inexpensive method of forming close tolerance holes in composites utilizing the B-stage characteristics of those composites. The holes are formed by assembling the composite structure, B-staging the composite material, cutting or drilling undersized holes in the B-staged material, inserting appro

An inexpensive method of forming close tolerance holes in composites utilizing the B-stage characteristics of those composites. The holes are formed by assembling the composite structure, B-staging the composite material, cutting or drilling undersized holes in the B-staged material, inserting appropriate male forming pins, dies or mandrels in the holes, completing the curing of the composite structure with pins in place and then removing the pins to leave high quality, close tolerance holes in the composite structure.

대표청구항 ▼

A method for the formation of holes in composite structure comprising the steps of: forming composite structure impregnated with a matrix material; B-staging the composite structure; cutting an appropriate size hole in the composite structure; inserting a male forming die in the composite structure;

A method for the formation of holes in composite structure comprising the steps of: forming composite structure impregnated with a matrix material; B-staging the composite structure; cutting an appropriate size hole in the composite structure; inserting a male forming die in the composite structure; completing the curing of the structure with the die in place; removing the male forming die leaving close tolerance hole in the composite structure.