Method for rolling a preliminary shape for a I- or H-section beam by means of rolls having shaping grooves

摘要

The invention relates to a method for rolling a preliminary shape for a I- or H-section beam by means of rolls having shaping grooves. In this method, a wedge-shaped guide groove is formed in the middle of each of the narrow sides of a plate-shaped slab. To form the flanges, a further cut is then made in the slab in the region of the guide groove and the flanks formed on either side of the cut are bent upwards until they are perpendicular to the web, forming a flange.