METHOD OF PRODUCING LOT OF HOT-ROLLED SHEETS Russian patent published in 2010 - IPC B21B1/46 

FIELD: process engineering.

SUBSTANCE: proposed method comprises producing slabs at continuous casting machines (CCM), their heating, rolling and cutting rolled stock into sheets of preset sizes. Proposed method comprises allowing for preset weight of the lot, determining the weight of one sheet P₁ and probable number n of sheets in the lot equal to n=(P-ΔP₁)/P₁…(P+ΔP₂)/P₁. Then for every integer n cut multiplicity is determined, i.e. K_i=K₁×K₂, where K_i is the number of sheets produced on cutting the rolled stock produced at CCM with due allowance for slab standard sizes, K₁ is tolerable number of sheets in cutting sheets in crosswise direction, and K₂ is tolerable number of sheets in cutting in lengthwise direction. Then for each K_i, proceeding from possible load-lifting capacity, tolerable slab weight is determined, i.e. P_{slab i}=k_cons·K_i·P₁, where k_cons=1.011…1.274 is coefficient of materials consumption. Then complying with minimum value of said coefficient of materials consumption and minimum tolerable surplus amount of precut sheets, and process limitations of equipment, maximum multiplicity of cutting is set, i.e. K_i=K_max, and optimum slab weight P_{opt slab}=k_cons·K_max·P₁ is determined to satisfy aforesaid conditions. Slabs are produced at CCM equipped with crystalliser with cross section satisfying the requirement of producing optimum weight slabs, i.e. P_{opt slab.}

EFFECT: minimised wastes in production of lots, higher quality.

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