Method for continuously measuring steepness of defective flatness of metal strip during rolling
US4309902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1979 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Dec 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/345
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for continuously measuring the steepness of a defective flatness of a metal strip during rolling, which comprises: detecting a variation in the relative distance between a metal strip during rolling and a distance-detecting means arranged adjacent to the surface of said metal strip, during the travel thereof between two support rolls arranged at a prescribed spacing, by means of said distance-detecting means, as a vibration including a vibration corresponding to a defective flatness produced in said metal strip; calculating the natural vibration frequency of said metal strip during the travel thereof between said two support rolls, from the detected value of the tension applied to said metal strip during the travel thereof between said two support rolls, the specific weight of said metal strip, and the distance between said two support rolls; cutting off the frequency components, which are below said calculated value of the frequency of said metal strip, from said detected value of the vibration of said metal strip obtained by said distance-detecting means, to detect the vibration of said metal strip, which corresponds to only the defective flatness of said metal strip; de…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.