Rolling mill third octave chatter control by process damping
US10065225B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 2015 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Mar 2, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B2265/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Control of third octave vibrations in a mill stand can be achieved using a high-speed piezoelectric assist coupled to a hydraulic gap cylinder to increase the damping of the roll stack. Vertical movements of the roll stack (e.g., the top work roll) can be determined through observation (e.g., measurement) of hydraulic fluid pressure of the hydraulic cylinder or entry tension of the metal strip. After determining vertical movements of the roll stack, a desired change in hydraulic pressure can be determined to overcome, reduce, or prevent third octave vibration. This desired change in hydraulic pressure can be effectuated at high speeds (e.g., at or above approximately 90 hertz) using the piezoelectric assist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.