FIELD: technological processes.
SUBSTANCE: invention relates to metal forming, in particular to production of bent section bars from flat work or tape in rolls of profile-bending machine. Shelves are bent relative to section bar wall with simultaneous pressing in areas of bending, along edges of wall and parts of shelves adjacent to zones of bending. Positive longitudinal deformation is created along section bar with reduction of its value by height of shelves from maximum value in zone of bending till zero at the line of section bar section centre of rigidity.
EFFECT: costs are reduced in process of manufacturing, and section bar quality is improved as a result of longitudinal bending elimination.
3 cl, 3 dwg
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