Patent ID: 6035682
Filing Date: 2000-03-14
Classification: B21B,B22D

Abstract:
A hot-rolling plant for the continuous production of bars, iron rods or wire in which a rolled section coming from continuous casting is longitudinally continuously rolled and comprising:means for continuous casting of a flat bloom having a thickness of less than 80 mm;an induction tunnel equalizing furnace for heating the flat bloom from said means for continuous casting to maintain the flat bloom at a rolling temperature;a first rolling stand having vertical rolls for bringing the flat bloom to a constant and exact width;a rolling stand for transforming the flat bloom from said first rolling stand into a plurality of split strips or bars, said rolling stand comprising:a first rolling means for rolling a flat shape of the flat bloom, said first rolling means comprising flat pressing rolls for rolling the flat bloom until it is a large flat having a thickness approximate to a largest section of a final rod section to be obtained and a width equal to at least a multiple of the largest section of the final rod section more than two in number, anda second rolling means having opposite annular grooved rollers for forming a flat longitudinally grooved advancing material from the flat and shaping, in contra-position, opposite buckled surfaces and recesses so as to form the section of the flat into a shape of ovals or lozenges that are attached to each other;longitudinal shearing means for separating the flat longitudinally grooved advancing material into a plurality of strips or bars such that the ovals or lozenges are longitudinally separated in correspondence with respective minimum thicknesses of the flat and so as to create a bed of continuously advancing rod sections which each comprise the bar, iron rod or wire to be obtained;rotating means for simultaneously rotating the plurality of strips or bars from said longitudinal shearing means 90 degrees;finishing rolling means having opposite annular grooved rollers for continuously producing finished bars; anda flying shear for shearing the finished bars, a bar unloading means for discharging the finished bars on to a cooling bed and a means for packing and fastening the finished bars positioned after said finishing rolling means.