Method for plotting roll gap for changing roller under condition of on-line strip steel in rolling mill

A calibration method and roll gap technology, which are applied in the field of HC rolling mill with on-line roll change in cold rolling mills and in the field of rolling mills in cold rolling mills, can solve problems such as errors in roll gap storage data, increase roll change time, and affect other problems, so as to save replacement. Roll time, increased flexibility, high reliability

Inactive Publication Date: 2007-12-26
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can complete the calibration function of the roll gap, in actual operation, in order to ensure the reliability and control accuracy of the roll gap storage, it is not allowed to operate any equipment when performing the roll gap storage and restoration function, and due to the There are continuous steel belts in the roll gap area of ​​1~4# racks, if the roll gap calibration of the current rack will affect the roll change of other racks, and other racks in the roll changing state will also affect the roll gap of the current rack Therefore, it is necessary to control the roll changing equipment of 1~4# rack

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for plotting roll gap for changing roller under condition of on-line strip steel in rolling mill
  • Method for plotting roll gap for changing roller under condition of on-line strip steel in rolling mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: When changing rolls, the control system calculates that the roll gap value δ to be opened is 156 mm according to the roll diameter of the old roll before the roll change, and the roll gap value is δ=δ 0 +δ 1 +δ 2 +δ 3 , when the diameter Ф 1 Replace the 415mm large roll with a roll diameter of Ф 2 For a small roll of 395mm, the roll diameter deviation is Ф Δ =Ф 1 -Ф 2 =20mm, at this time the roll gap value δ recorded by the control system does not change to 156mm, but the actual roll gap δ′ increases to δ+Ф due to the reduction of the roll diameter after the roll change Δ =156mm+20mm=176mm, if the roll deviation compensation is not performed at this time, when the roll gap is closed to zero, there is still a 10mm gap between the upper and lower rolls, so the roll diameter deviation compensation must be performed, and the compensated roll gap value is δ '=δ+Ф Δ =(δ 0 +δ 1 +δ 2 +δ 3 )+(Ф 1 -Ф 2 ), after the roll change is completed, modify the ...

Embodiment 2

[0027] Example 2: If the roll gap value δ is opened to 156mm, when the diameter Ф 1 Replace the 400mm small roll with a roll diameter of Ф 2 When the 415mm roll is changed to a larger roll, the roll diameter deviation is Ф Δ =Ф 1 -Ф 2 =15mm, the roll gap value δ recorded by the control system after the roll change is not changed to 156mm, but the actual roll gap value δ′ decreases to δ+Ф due to the increase of the roll diameter after the roll change Δ =156mm-15mm=141mm, if the roll deviation compensation is not performed at this time, when the roll gap is closed to 15mm, the upper and lower rolls have moved closer together, so the roll diameter deviation compensation must be performed, and the compensated roll gap value is δ′=δ +Ф Δ =(δ 0 +δ 1 +δ 2 +δ 3 )+(Ф 1 -Ф 2 ), after the roll change is completed, modify the roll gap value recorded in the control system according to the roll diameter deviation value of the new / old roll, and the roll gap value recorded in the co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a cold-rolling mill HC rolling mill strip steel online roll changing and roll gap demarcating method that includes the following steps: a. according to request, haulling out old roller and installing new roller; starting new/old roller diameter bias compensating function; starting roll gap demarcating function; until rolling load is less than 50t, finishing demarcating. The invention has the advantages of simple technology, high reliability, and could save the time of changing roller. It also improves the reliability and practicability of online roller-changing.

Description

technical field [0001] The invention relates to the field of rolling mills in cold rolling mills, in particular to the field of on-line roll change for HC rolling mills in cold rolling mills. Background technique [0002] At present, after the acid rolling is online, the roll change of the rolling mill can only be done online. Since there is strip steel in the frame during the roll change, the roll gap position cannot be calibrated according to the absolute roll marking method before the online. In order to ensure that the position of the roll gap does not change before and after the roll change, the conventional relative standard roll is generally used, that is, the roll gap storage function of the relative standard roll is performed before the roll change, and the rolling force of the roll change stand is automatically pressed to the preset value. Rolling force (usually 300t), and then store the current roll gap; execute the roll gap recovery function after the roll change...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B21B37/58B21B38/10
Inventor 汤伟郑世林毛兵
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap