FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly to producing flat-section girder with cross section varying over its length. Flat metal strip is formed to produce girder with the help of profile-iron bending machine with several forming devices. The latter have two pressure rollers for form each side flange and support rollers to form central flange. During forming, two pressure rollers can move horizontally and vertically. Support rollers can move vertically, and separately, in cross wise direction. All four angles of hat-shape profile are formed simultaneously to allow bending the angles on peripheral edges on pressure and support rollers. Axles of both pressure and support rollers can revolve to allow match between formed angles.
EFFECT: expanded operating performances.
11 cl, 4 dwg
