FIELD: plastic metal working, namely processes for making double-curvature parts by stretching sheet blanks.
SUBSTANCE: method comprises steps of combined deforming of blank with cover plate on punch of stretching press and then removing cover plate; using cover plate in the form of two flexible sheets preliminarily placed onto punch of stretching press with possibility of moving on its surface; fixing one end of each sheet of cover plate in clamps of press together with sheet blank; after removal of cover plate finally deforming sheet blank for forming target contour part. Method allows form double-curvature parts with highly uniform elongation deformation of blank.
EFFECT: enhanced efficiency of process at keeping physical and mechanical properties of material and at maximally using deformation capability of material.
2 dwg, 1 ex
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