PANEL OF CURVILINEAR SHAPE AND METHOD OF ITS MANUFACTURING Russian patent published in 2010 - IPC B64C3/26 B32B3/20 B21D47/00 

FIELD: construction.

SUBSTANCE: panel of curvilinear shape comprises upper and lower linings and zigzag corrugated filler arranged in between. Filler is arranged in the form of folded construction of helical structure, which, in its finally transformed condition contains cells along each serrated line, which are limited with inclined and vertical walls produced by two pairs of adjacent facets in the form of irregular quadrangles separated with section of zigzag line inclined towards serrated line, which is common for both pairs, at the angles of α₁ and α₂. α₁ is angle between common serrated line and section of zigzag line, which separates a pair of adjacent facets, which, in finally transformed condition produce vertical wall of cell. α₂ is angle between common serrated line and section of zigzag line, which separates a pair of adjacent facets, which, in finally transformed condition produce inclined walls of cell, at the same time condition of α₁<α₂ is maintained. According to method for manufacturing of multilayer panel of curvilinear shape with separate shaping of linings with specified curvature and layer of filler, sheet stock at the first stage is marked with bending lines, which produce elementary modules with specified geometric parametres. At the second stage sheet stock is transformed into relief position, where it takes form of folded construction of helical structure. At the third stage produced folded construction is shaped till finally transformed condition, which is characterised by formation of cells limited with inclined and vertical walls.

EFFECT: increased strength and rigidity of panels.

2 cl, 13 dwg, 1 tbl