Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hot rolling and finish rolling multi-level threading speed control method

A technology of strip threading speed and control method, applied in rolling mill control device, metal rolling, metal rolling, etc., can solve problems such as hidden dangers of scrap steel

Active Publication Date: 2013-06-26
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the strip threading speed is also a problem that cannot be ignored for the hidden danger of scrap steel brought about by the normal production of the rolling line.

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
  • Hot rolling and finish rolling multi-level threading speed control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] For the hot rolling and finishing rolling multi-stage threading speed control of this embodiment, refer to figure 1 , taking the 7-stand (F1-F7) finishing mill equipped with finish rolling temperature and strip end position monitoring, the rolled strip thickness is 1.80mm, and the target finish rolling temperature is 880±20°C as an example, the longitudinal The coordinate V is the belt threading speed, and the abscissa F is the rack. The specific steps are as follows:

[0024] (1) When rolling the first piece of strip steel, the initial strip threading speeds of the strip steel in the 7 racks are determined to be 1.22m / s, 2.30m / s, 3.59m / s, 5.36m / s which increase linearly .

[0025] 1.22*16.29=2.30*8.60=3.59*5.52=5.36*3.70=7.49*2.64=9.62*2.06=11.00*1.80=C, so the principle of equal flow per second is satisfied.

[0026] (2) When the strip head leaves the last stand F7, the instrument detects that the average actual temperature of the strip head is 852°C, which is lower...

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 relates to a hot rolling and finish rolling multi-level threading speed control method, and belongs to the technical field of steel rolling control. According to the hot rolling and finish rolling multi-level threading speed control method, in a group of steel rolling mill provided with finish rolling temperature and strip steel end location monitoring, the initial threading speed of each corresponding machine frame in a group of machine frames is determined as a matter of routine; when the monitored finish rolling temperature is lower than a target temperature, the speed of next time threading of a first machine frame is improved according to a scheduled speed-up ratio; if the monitored finish rolling temperature is still lower than the target temperature, the threading speed of a next machine frame is improved according to the scheduled speed-up ratio until before the middle machine frame; if the monitored finish rolling temperature is still lower than the target temperature, the second step is repeated; and after the threading, a strip steel end is output from a speed-up machine frame, enters in front of a bite steel of a next machine frame with the initial threading speed, and controls all speed-up machine frames to recover into original corresponding initial threading speeds. By means of the method to the maximum extent, the threading speed of the current machine frame can be improved appropriately to achieve the purpose that the finish rolling temperature is kept not to lower than a threshold value.

Description

technical field [0001] The invention relates to a steel rolling speed control method, in particular to a hot rolling finish rolling multi-stage strip threading speed control method, which belongs to the technical field of steel rolling control. Background technique [0002] In the hot rolling production process, the control of the final rolling temperature is an important key point, because the deviation between the actual temperature of the strip and the target temperature directly affects the structure and performance of the strip. The control of the actual finish rolling temperature is related to factors such as rolling speed (including strip threading speed, rolling speed, and steel throwing speed), cooling water between stands, intermediate billet thickness, actual temperature of incoming materials, and target temperature setting. Under the same conditions, it is easy to control the finishing temperature of strip steel with thicker finished product specifications (>2...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/00
Inventor 卞皓谢向群夏小明凌爱兵
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com