EXPANDED REGULATION OF A JCO FORMING PRESS

摘要

The invention relates to a method for producing open seam tubes from sheet panels, in particular thick sheet panels, wherein a sheet panel is fed to a tube forming press in which it is gradually formed, resting on a lower die, by a liftable and lowerable upper die, by application of a bending force, into the open seam tube that has opposite longitudinal edges for subsequent longitudinal welding with a gap, wherein an open seam tube having a non-round preform is produced by forming being carried out at least in a bending step that acts on the inner side of the sheet panel in each case on the left and the right with respect to the means predefined by the longitudinal axis of the upper die that plunges into the gradually formed sheet panel, characterized in that, for each sheet panel, the individual contour is determined, whereupon, using a geometrical model for the right-hand and left-hand side of the open seam tube, parameters are determined for support-tube positioning, in particular of the rotation angle and/or of the rotation length, and the yield strength in each side of the sheet panel is determined by an online recording and evaluation of the pressure/path profile during forming, and on the basis thereof the measure of the bending step acting on the inner side of the sheet panel in each case on the left and the right is determined.