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Method for controlling thickness of hot-continuous-rolled intermediate slab and length of cast ingot

A control method and hot continuous rolling technology, applied in the field of metal pressure processing, can solve problems such as low yield of hot continuous rolling production, and achieve the effects of improving yield, avoiding additional head and tail cutting damage, and avoiding equipment accidents.

Active Publication Date: 2017-08-11
GUANGXI LIUZHOU YINHAI ALUMINUM IND +1
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  • Abstract
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  • Claims
  • Application Information

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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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  • Method for controlling thickness of hot-continuous-rolled intermediate slab and length of cast ingot
  • Method for controlling thickness of hot-continuous-rolled intermediate slab and length of cast ingot
  • Method for controlling thickness of hot-continuous-rolled intermediate slab and length of cast ingot

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Embodiment Construction

[0028] Below in conjunction with embodiment the present invention is described in further detail:

[0029] The method for controlling the thickness of the hot continuous rolling intermediate slab and the length of the ingot in this embodiment adopts "1+4" hot continuous rolling, and the method includes the following steps:

[0030] A. According to the set rolling pass reduction rate of each stand of the continuous rolling mill and the finished product thickness of the rolled piece, back calculate the reference value of the intermediate billet thickness and the rolling pass reduction of each stand.

[0031] Assume that the reference value of the intermediate billet thickness is h f , the unit is mm; according to the setting principle of the rolling process, the reduction rate of the rolling pass from the first stand to the fourth stand is a%=45%, b%=42%, c%=40% , d%=38%; the rolling reductions from the first stand to the fourth stand are y in turn 1 、y 2 、y 3 、y 4 , the un...

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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 a hot continuous rolling intermediate slab and the length of an ingot. Background technique [0002] At present, the setting value of the thickness of the intermediate slab for hot continuous rolling is estimated by the factory technicians based on production experience, which has great uncertainty. The setting value of the intermediate billet thickness estimated by experience will cause the following problems: when the setting value of the intermediate billet thickness is too large, it may cause the pressing load of each frame to exceed the limit and cause an accident; when the setting value of the intermediate billet thickness If it is too small, it will lead to too many rolling passes in the roughing mill, and the pass reduction load of the continuous rolling mill is too small, which not only increases the power consu...

Claims

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Application Information

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IPC IPC(8): B21B37/16B21B37/70
CPCB21B37/165B21B37/70B21B2261/04B21B2261/12B21B2265/12
Inventor 许磊黄明辉蒋婷刘栩李毅波
Owner GUANGXI LIUZHOU YINHAI ALUMINUM IND
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