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The invention relates to working of metals by pressure, in particular to the production of bent profiles with elements of double thickness. A method includes multipass bending of the flat elements of the bend in the rolls of roll-forming machine, making of bending point with a radius equal to (7-15)S in the area of bending at 0-90° with subsequent decrease to 0 in the area of bending at 90°-180°.
UA93121861A1993-04-191993-04-19Method of production of profiles with elements of double thickness
UA6865C2
(en)