FIELD: plastic working of metals, possibly manufacture of non-equal flange channel sections.
SUBSTANCE: method comprises steps of successively bending from pass to pass edge members of strip blank by predetermined bending radiuses while changing concrete values of bending angles in direction of shaping. In first and second passes bending angle α of small flange of section is set equal to 24 - 25° and in pre-final pass bending angle α is set equal to 10°. Bending angle of large flange in pre-final pass is increased relative to such angle of previous pass by 8 - 9°. Bending radiuses for all passes are constant ones and they are equal to doubled thickness of section.
EFFECT: improved quality of non-equal flange channel sections due to their enhanced geometry and due to lowered manufacturing expenses.
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