Apparatus for forming hollow profiles

The invention relates to a device for forming hollow profiles (5), comprising a forming tool that varies an elongate shaped body (2) whose cross-sectional area and / or cross-sectional shape along a longitudinal axis and a portion of the shaped body (2) which surrounds the forming head (10) with at least two forming rollers (3) can be fed for bending a along a surface line of the molding (2) the sheet metal strip (1) around the formed body (2), wherein the forming head (10) and / or the shaped body (2) are designed so flexible that a relative movement of the forming head (10) is executable in the direction of the longitudinal axis and have said forming rolls (3) lying in each case tangentially to the shaped body (2) axis, whose distance from the longitudinal axis corresponding to the cross-sectional area and / or cross-sectional shape of the portion of the molding (2) , the shape of the head (10) engages, is variable, and wherein the forming rollers (3) in each case a force in the direction of the molding (2) exercise, further comprising a feed unit (9) for advancing the sheet metal strip (1) and the forming rollers (3) in the feed direction (6) of the sheet metal strip (1) downstream of the welding machine (4), with which the edges of the bent sheet metal strip (1) welded are, with the welding apparatus (4) monitors the Istqualitat (Q