UA92950C2 - METHOD for HEATING AND PREPARATION of the blankS BEFORE rolling in the hot rolling mills - Google Patents

Abstract

The invention relates to the field of metallurgy, in particular to a method for heating and preparation of the blanks before the rolling in the hot rolling mills. The method for heating and preparation of the blanks before the rolling in the hot rolling mills, in particular slabs and plates, which provides planting blanks into the heating furnace, heating and preparation of the blanks for the rolling, the geometrical sizes of which are smaller than it is needed for planting in this heating furnace, for example, pushing furnace or the walking-beam furnace, their subsequent heating, supplying for roller gear of the rolling line, at that the smaller blank is set of on the top of the blank with geometric dimensions appropriate for planting in this heating furnace. After that their compatible planting into the furnace is carried out, heating and supplying from the furnace on the the rolling gear of the roller line. Then before the vertical stand of the rolling line at first both pieces are unfold in the horizontal plane at an angle of 90 ° and the upper blank is clamped on the ends by the manipulator slide beams. Then the lower blank is moved back from under the upper one, by the switching of the rollers of the rolling gear on the reverse, and it is moved back relatively to the vertical strand of the rolling line. And after that moving apart the manipulator lines the upper blank is lowered on the rolling gear and rolling thereof is carried out. The blank which width is by 50- is more than the width of the upper blank, and its length - at least by 50- is less than the length of the upper blank is used as the lower blank. In addition, the total width of the loaded in the heating furnace lower and upper blanks is not more than . The invention provides a lowering the cost of heating process, specific fuel and metal consumption while maintaining the desired quality of the produced rolled metal and increasing the productivity of equipment during heating and rolling.