The Control Method of Thickness and Ingot Length of Hot Continuous Rolling Intermediate Billet

Abstract

The invention discloses a method for controlling a thickness of a hot-continuous-rolled intermediate slab and a length of a cast ingot, and relates to the technical field of metal pressure machining. The method comprises the following steps: according to a set rolling pass reduction rate of each frame of a continuous rolling machine and a thickness of a finished rolled piece, a thickness reference value of the intermediate slab and a rolling pass reduction quantity of each frame are inversely computed; the rolling force checking and the correction are performed for the thickness reference value of the intermediate slab; if calculated rolling force exceeds a maximum rolling force allowed value allowed by each frame, the rolling pass reduction quantity is reduced, and the iterative computation is repeated until the calculated rolling force is lower than or equal to the maximum rolling force allowed value; then, the correction calculation is performed for the thickness reference value of the intermediate slab, and a rough rolling machine is used for rolling to reach the calculated thickness of the intermediate slab; according to the corrected thickness value of the intermediate slab, a length of a roller way from the rough rolling machine to a continuous rolling machine, and a thickness of the cast ingot, the length of the cast ingot is calculated; and the cast ingot is cast according to the calculated length of the cast ingot. The method solves the problem of low yield in traditional hot continuous rolling production.

Description

Technical field [0001] The invention relates to the technical field of metal pressure processing, in particular to a method for controlling the thickness of an intermediate billet and the length of an ingot in hot continuous rolling. Background technique [0002] At present, the setting value of the thickness of the intermediate billet of the hot continuous rolling is estimated by the technicians of the factory based on the production experience, which has great uncertainty. This empirically estimated intermediate billet thickness setting value will cause the following problems: When the intermediate billet thickness setting value is too large, it may cause the reduction load of each frame to exceed the limit and cause an accident; when the intermediate billet thickness setting value If it is too small, it will cause too many rolling passes of the rough rolling mill, while the reduction load of the continuous rolling mill is too small, which not only increases the power consumpti...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for controlling the thickness of the hot continuous rolling intermediate slab and the length of the ingot, which can solve the problem of low yield in the existing hot continuous rolling production

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