H-beams can be produced by either welding or rolling. Welded H-beam is a strip of suitable thickness cut to a suitable width, and the flange and web are welded together in a continuous welding unit. Welded H-beam has the disadvantages of large metal consumption, not easy to ensure the uniformity of product performance, size specifications are limited.
Therefore, H-beam is mainly produced by rolling method. In the modern rolling production, the use of rolling mill rolling H. H-beam web in the upper and lower horizontal rolls between the rolling, flange in the horizontal rolls between the side and vertical rolls at the same time rolling forming.
As only with the mill can not yet be applied to the edge of the flange under the edge, so it is necessary to set up in the rack after the edge of the end of the machine, commonly known as the edge of the machine, in order to give the edge of the edge of the flange under the edge and control the width of the flange. In the actual rolling operation, the two racks as a group, so that the rolled parts reciprocating through a number of times, or so that the rolled parts by several racks and one or two racks of rolling edge end of the machine seat of the rolling unit, each time to apply a certain amount of pressure, the billet will be rolled into the required specifications of the shape and size of the product. In the flange area of the rolled parts, the wear of the rolls is relatively large due to sliding between the horizontal roll sides and the rolled parts.
