METHOD OF MOLDING OF STAMPED FORMED PROFILE Russian patent published in 2008 - IPC B21D5/06 

FIELD: technological processes.

SUBSTANCE: simultaneously perform feeding of two flat preforms of certain width in the profile bending machine at different levels for molding closed stamped formed profile consisting of two corrugated sheets with orthogonally related semicircular corrugations; upper one has smaller width, consecutive molding in the first two-high stands of direct corrugations on the lower strip, directed downwards, with overcast angles, diminished in a cogging direction with a certain angle of inclination of lateral faces of ready corrugations to a horizontal plane. Simultaneously perform transportation of the upper strip in a four-high stand, forming in one operation cross-section closed corrugations, directed up with the same height and an angle of inclination of lateral faces to a horizontal plane. Connect the upper strip to the lower after overcast in three last passes of side crimps of the lower strip up and at reaching of a certain corner. In last operations in two-high stands perform overcast of side crimps of the lower strip to a corner 180° with formation of interlock of both strips of the trebled width.

EFFECT: assortment expansion of channeling mill and decrease of cost.

4 cl, 1 ex