Method of controlling operation of tandem rolling mill and method of manufacturing hot-rolled steel sheet using the same
US8850860B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 24, 2012 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Sep 24, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B2273/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Provided is a method of controlling operation of a tandem rolling mill which enables large reduction rolling in the latter-stage stand of the tandem rolling mill necessary for manufacturing fine-grained steel, and so on. The method comprises: a step of determining a first exit-side sheet thickness in rolling a constant portion of a material to be rolled; and a step of determining a second exit-side sheet thickness in rolling a front end portion of the material, such that a pre-tightening load becomes a set value or less; the material is rolled into the second exit-side sheet thickness, until the front end portion is fed into the stands; the constant portion is rolled by the stand given a pre-tightening load into the first exit-side sheet thickness; and the second exit-side sheet thicknesses of the stands given the pre-tightening load are made larger than the first exit-side sheet thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.