Unlock instant, AI-driven research and patent intelligence for your innovation.

Roll wear dispersion method and rolling system of rolling stand

A decentralized, rack technology, applied in the direction of metal rolling stands, metal rolling, metal rolling, etc., can solve the problems of changes, deterioration of the flatness of the rolled material, etc., and achieve the effect of improving productivity

Active Publication Date: 2021-06-22
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the case of using a curved roll, if the reverse offset is changed for wear dispersion, the equivalent roll crown will change from the originally required value.
In such a case, the ratio crown on the exit side changes greatly with respect to the ratio crown on the entrance side of the rolling stand, and the flatness of the rolled material deteriorates.

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
  • Roll wear dispersion method and rolling system of rolling stand
  • Roll wear dispersion method and rolling system of rolling stand
  • Roll wear dispersion method and rolling system of rolling stand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0045] (rolling system)

[0046] The rolling system according to Embodiment 1 includes a single or a plurality of rolling stands, and rolls steel or other metal materials into a plate shape by hot rolling or cold rolling. image 3 It is a schematic diagram showing a configuration example of a rolling system according to Embodiment 1. exist image 3 In the hot rolling line shown, for example, the aforementioned semi-endless rolling or endless rolling is performed. In addition, the present invention can also be applied to a cold rolling line.

[0047] exist image 3 In this method, the rolled material 20 of the metal material is stretched thinly while being processed in the hot rolling line, and the size and temperature of the rolled material are controlled to desired target values. The rolling facility 1 includes a heating furnace 2 , a rough rolling mill 3 , a finishing mill 4 , a run-out table 5 , a coiler 6 , and a table 7 for conveying a material to be rolled 20 between...

Embodiment approach 2

[0135] Next, Embodiment 2 will be described. In Embodiment 1 above, the reduction position difference δ required for control can be calculated by formula (16) or (19) based on the offset in the same direction S . However, in actual rolling, there are cases where the reduction position difference is restricted. For example, when the plate thickness is small, if the reduction position difference is increased, the width direction end portions of the upper and lower curved rolls may contact. In addition, when the length of the hydraulic cylinder of the holding down device ( 26WS, 26DS ) is shortened in order to improve responsiveness, the movable range of the hydraulic cylinder may be insufficient.

[0136] Therefore, in Embodiment 2, in such a case, both the offset in the same direction and the offset in the reverse direction are changed to distribute the wear of the work rolls. That is, the offset in the same direction is reduced, and a part of the offset in the reverse direc...

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 purpose of the present invention is to disperse the wear of the work rolls while maintaining the equivalent roll crown. When the reverse offset for obtaining the desired equivalent roll crown and the same-direction offset for wear dispersion are used in combination, the roll gaps at both ends of the width of the material to be rolled (20) will be different. Therefore, the difference between the pressing position on the working side and the pressing position on the driving side is changed (leveled) so that the roll gap difference at both ends of the width of the material to be rolled (20) approaches zero. As a result, the axial distance between the work rolls on the work side and the drive side is changed, and the roll gap difference at both ends in the width direction of the material to be rolled (20) approaches zero. Therefore, the wear of the work rolls can be dispersed while maintaining the equivalent roll crown.

Description

technical field [0001] The invention relates to a roll wear dispersion method and a rolling system of a rolling stand. Background technique [0002] In plate rolling, the plate crown and flatness are equally important characteristic indexes as plate thickness, plate width, and temperature. Sheet convexity is the sheet thickness difference between the center and end (actually, a position at a predetermined distance (25mm or 40mm, etc.) from the sheet end) of the sheet width direction of the product. In the case that the rolled material is directly shipped from the factory and processed by the end user, the plate crown will affect the dimensional accuracy of the final product. In addition, when the material to be rolled is further processed and treated in downstream processes such as cold rolling, the plate crown also affects the plate passability and the like in these facilities. As such, since plate crown affects productivity, it needs to be within target tolerances. [0...

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 Patents(China)
IPC IPC(8): B21B13/14B21B37/58
CPCB21B37/62B21B37/42B21B13/142B21B37/58B21B37/60
Inventor 佐野光彦
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP