Экспериментальное исследование режима настройки чистового блока при прокатке катанки диаметром 5,5 мм

Abstract

This article describes the setup mode block of rolling mill PJSC "Dneprovsky Integrated Iron & Steel Works" for rolling wire rod, 5.5 mm diameter, that developed on the basis of results calculation the mathematical model of the process of continuous rolling of wire rod. Model allows to define the size of the bars by the stands, the conditions of rolling in the spaces between the stands of the wire block depending on the basic settings that determine the technological parameters. Comparison of calculation results with experimental data confirmed the adequacy of the proposed mathematical model. Mistake determination of the height and width of the wire rod is within common engineering accuracy calculations. Measurement of the finished profile along the length coil of wire rod showed that the cross-sectional dimensions are stable along the length coil of wire. The sizes of the cross-section are contained in the tolerance of ±0,2 mm. Defective forward end of the coil wire was fully excluded. Length defective end was reduced from 5 convolutions (~15 m) to 2.5 convolutions (~7.5 m). The fold on the wire surface found on the first experimental coils of rod, caused by the overflow the before finishing round caliber (8 stand). The overflow the before finishing round caliber (8 stand) due to imperfect shape and dimensions of the calibers 6, 7 and 8 stands of the block, as well as inaccuracy by setting of the gap between the rolls of these stands. The effect reduced of height profile in the finishing pass in the rolling at operating speeds was identifying during measurement. Reason for the reduced height requires further research.