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Dynamic variable regulation method based on ESP finishing mill group roll withdrawal

A technology of finishing rolling unit and variable schedule, which is applied in the direction of metal rolling stand, metal rolling mill stand, rolling force/roll gap control, etc., and can solve roll wear, affect production quality and production efficiency, frequent roll change, etc. question

Active Publication Date: 2019-02-19
YANSHAN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the products of the ESP production line are mainly thin-gauge plate and strip products, the roll wear of the finishing mill during the rolling process is very serious, and the roll change cycle is generally twice that of conventional rolling. Frequent roll change has seriously affected production quality and productivity

Method used

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  • Dynamic variable regulation method based on ESP finishing mill group roll withdrawal
  • Dynamic variable regulation method based on ESP finishing mill group roll withdrawal
  • Dynamic variable regulation method based on ESP finishing mill group roll withdrawal

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Embodiment Construction

[0091] The present invention aims to provide a dynamic variable procedure method based on ESP finishing rolling roll withdrawal, that is, to determine the order of withdrawal of a stand through strategy calculation, and to transition the original normal five-stand rolling procedure to the abnormal four-stand rolling procedure. Stand rolling regulation, the present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0092] Take the roll stand F 5 As an example, see Table 1 and Table 2 for specification changes and schedules. Table 1 is the schedule before roll removal, and Table 2 is the schedule after roll removal.

[0093] Table 1 Procedure Table 1

[0094]

[0095] Table 2 Procedure Table 2

[0096]

[0097] As shown in Table 1, take the roller stand F 5 Taking online withdrawal rolling as an example, the specification of the rolling mill is changed from 1.0mm to 1.3mm, and the rolling schedule is switched from specif...

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Abstract

The invention provides a dynamic variable regulation method based on ESP finishing mill group roll withdrawal. According to the input rolling process and rolling mill parameters, the sorties of roll withdrawal racks are calculated firstly. Then, each rack needs to be adjusted and each upstream rack of the roll withdrawal racks is adjusted. When a thickening point reaches the roll withdrawal racks,rolls of the roll withdrawal racks are lifted and adjusted. When the roll withdrawal racks Fi are removed from rolling, each downstream rack of the roll withdrawal racks is adjusted to complete the dynamic variable regulation by means of the rolls withdrawal. By calculating the sorties of the roll withdrawal racks and adjusting the rolls rotation speed and gaps in each stage of the roll changingprocess, the dynamic variable regulation method based on ESP finishing mill group roll withdrawal achieves that the dynamic variable regulation is completed by the non-stop roll withdrawal on the premise of ensuring the stable rolling of rolling mills, so that the continuity of an ESP production line is ensured, the energy loss caused by the shutdown is reduced, and the application value is high.

Description

technical field [0001] The invention relates to the field of metallurgical continuous casting and rolling, in particular to a dynamic variable schedule method for removing rolls based on an ESP finishing mill. Background technique [0002] Hot-rolled thin strip steel can be used as finished products or raw materials for cold rolling, and its demand continues to grow worldwide. However, the traditional hot-rolled strip steel process has serious environmental pollution and huge energy consumption, which is not conducive to the construction of an energy-saving and environmentally friendly society. At present, the research hotspot at home and abroad is to develop thin slab continuous casting and rolling process, "replacing heat with cold" to produce thin-gauge slab products, so as to reduce energy consumption and environmental pollution. Endless Strip Production (ESP) is a cutting-edge technology in the field of short-process hot-rolled strip at home and abroad. It can make full...

Claims

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Application Information

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IPC IPC(8): B21B31/08B21B37/48B21B37/58B21B37/46
Inventor 彭艳张敏杨彦博刘才溢
Owner YANSHAN UNIV
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