Hot-rolled strip steel rolling technology for preventing high-speed breaking-away of roughing mill

A technology for hot-rolled strip and roughing mills, applied in rolling mill control devices, metal rolling, manufacturing tools, etc., can solve problems such as large vibration and damage to equipment, and achieve the effect of reducing impact, ensuring normal production, and ensuring equipment is in good condition

Active Publication Date: 2014-08-20
TANGSHAN GUOFENG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-speed steel throwing has a great vibration on the roughing mill and its connected equipment, which seriously damages the equipment

Method used

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  • Hot-rolled strip steel rolling technology for preventing high-speed breaking-away of roughing mill
  • Hot-rolled strip steel rolling technology for preventing high-speed breaking-away of roughing mill

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Embodiment Construction

[0021] The present invention will be further described below by embodiment.

[0022] figure 1 Among them, 6400 is the rough rolling mill that bites steel at a biting speed of 2.8 m / s, 6450 is the rough rolling mill that rolls steel at the rolling speed (5.5 m / s at the last pass), and 7600 is the rough rolling mill that uses the hot coil box to thread the strip at a speed of 2.1 m / s Throwing steel in seconds, 7700 is steel at a creeping speed of 1.2 m / s after throwing steel in the rough rolling mill.

[0023] refer to figure 2 A rolling process for hot-rolled strip steel to prevent high-speed throwing of roughing mills, comprising heating, rough rolling, hot coiling, and finish rolling, with a detection point between heating and rough rolling, and the rolling process includes the following steps:

[0024] Step 1: Calculate the critical length S of whether the rough-rolled final slab is a short slab;

[0025] S=S 1 -S 2 +S 3 +k, where:

[0026] The distance S from the de...

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Abstract

The invention relates to a hot-rolled strip steel rolling technology for preventing high-speed breaking-away of a roughing mill, and belongs to the technical field of steel rolling processes in the metallurgical industry. According to the technical scheme, the technology is characterized by comprising the following steps of: 1, calculating whether a rough-rolled final plate blank is a short blank with the critical length S=S1-S2+S3+k; 2, determining a tail speed reducing point position of the final plate blank: S4=S2-k-S3; and 3, when the actual length of the rough-rolled final plate blank is smaller than the critical length S and the actual tail position of the final plate blank is equal to the tail speed reducing point position S4 of the final plate blank, or when the actual length of the rough-rolled final plate blank is greater than or equal to the critical length S and the actual head position of the final plate blank is equal to the head speed reducing point position S1 of the final plate blank, reducing the speed of the final plate blank, namely reducing the rolling speed of the final plate blank to the hot coil strip penetrating speed till the tail of the final plate blank is broken away. The technology has the advantages of accurately controlling the speed reducing point position and the speed of the final plate blank of the roughing mill, preventing the breaking-away condition of the roughing mill at a high speed, reducing influence on the roughing mill and equipment connected with the roughing mill, ensuring perfectness of the equipment and ensuring normal production.

Description

technical field [0001] The invention relates to a rolling process for preventing high-speed steel throwing of a rough rolling mill for hot-rolled strip steel, and belongs to the technical field of steel rolling process in the metallurgical industry. Background technique [0002] Rough rolling is a necessary process in the hot continuous rolling production chain of modern steel mills. The rough rolling mill is located behind the heating furnace and before the hot coil box. Enter the finishing rolling mill and roll into hot-rolled coils of required thickness. In the basic automation TDC control program of Siemens' hot continuous rolling production line, the LCO functional unit is used to coordinate the actions of various equipment in the rough rolling area, including the coordinated control of the speed of the rough rolling mill and the roller table in the automatic mode. In the LCO, the entire rough rolling The area is divided into three areas: entrance area, reversing rolli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/26B21B37/00B21B38/00
Inventor 董跃敏
Owner TANGSHAN GUOFENG IRON & STEEL
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