MODERNIZATION OF METALLURGICAL EQUIPMENT WITH THE DEVELOPMENT OF AN INNOVATIVE METHOD OF COILING HOT-ROLLED STRIPS

Kassym Yelemessov, Kanay Rysbekov, Dinara Baskanbayeva, Akzhan Igbayeva

2021

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DOI 10.31713/m1009
Data confidence 70 medium
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Abstract

The report presents the results of laboratory studies on the use of a combined (water and air) method of coiling hot-rolled strips on a coiler of a continuous broadstrip mill 1700. An innovative method of coiling strips allows to completely abandon the mechanical formation of hot-rolled coils. In order to study the hydraulic formation in laboratory conditions, a model of a coiler was created, which was structurally tied to the existing laboratory rolling mill "DUO-100". Studies carried out on the laboratory model of a coiler with hydraulic roll formation confirmed the fundamental possibility of using the proposed coiling method for working with various materials. Aluminum and lead strips were used as hot rolled strip. The results of laboratory work indicate a sufficient convergence of calculations with experimental data, which allows using the results obtained as recommendations for the creation of industrial installations. A method for calculating the flow rate and pressure of water and air is proposed. The calculation of the clamping force of the front end of the strip and the refined selection of the number of collectors and the maximum angle of rotation of the nozzle are carried out. The use of the combined principle for the formation of the first turns of the roll avoids contact between the rolled metal and the strip, expands the adjustment limits and reduces the requirements for its accuracy. The results obtained make it possible to recommend the use of a combined method of strip coiling in rolling production.