The application discloses a kind of forming methods of composite curved
surface structure, comprising: selecting characteristic edge as
ridge line and establishing coordinate
system;Determine
engineering boundary and expand
processing allowance to form manufacturing boundary;Carry out manufacturability analysis and expand manufacturing boundary to two-dimensional profile;Lay and
cut composite material layer;Hot diaphragm preforming and
hot press tank solidification are mechanically processed into shape.The application adopts different
processing allowance expansion ways and expansion strategies according to the symmetry of structure.Avoid preforming
wrinkle through manufacturability analysis based on
ridge line;Ensure that layer and tooling correspond accurately through
ridge line projection and positioning structure design;Reduce
transfer error by using hot diaphragm preforming and
hot press tank solidification process.The method is suitable for hyperbolic
stringer and other complex components in the field of
aerospace, improves production efficiency and material utilization, reduces forming defect rate, and realizes stable manufacturing of high-quality
composite structure.