Rolling mill for a plate or a sheet and its control technique
US8720242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2008 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Nov 2, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B2275/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides a rolling mill of a plate or a sheet which eliminates rolling trouble due to warping of the rolled material and wavy shaped flatness defects running through the plate or sheet width direction such as “waviness”, “full waves, and “small waves” by providing a pair of a top and bottom work rolls, a pair of electric motors independently driving the pair of rolls, and control means for controlling one electric motor using the roll rotational speed as a control target value and controlling the other electric motor using the rolling torque applied to the rolled material from the work roll driven by that electric motor becoming substantially constant as a control target and using the drive torque as a control amount and a control technique of such a rolling mill of a plate or a sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.