Control method and apparatus for screwing down reeling rolls
US4506531A · kind A · utility
Inventors
Key dates
| Filing date | Mar 15, 1982 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Mar 15, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B19/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A control method for controlling the screwing down pressure provided in a reeling mill where the reels are controlled by a combination of signals continuously monitored by a computer. The signals include the temperature of the pipe entering the reeling mill, the voltage and current supplied to the reeling motor and the speed of the reeling motor. A calculation is then performed which gives the actual reduction of wall thickness based upon a predetermined relationship of the temperature of the pipe entering the reeling mill and the torque of the rolling motor. The torque is calculated based upon the speed, current and voltage of the rolling motor. The pressure supplied to the rolling reels is then altered based on this signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.