Device for controlling a stretch-reducing mill
AssigneeSMS group GmbH
InventorAlexander Gohr
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a method for controlling a stretch-reducing mill. Tube ends of stretched tubes are optimized by controlling one or more motors of the stretch-reducing mill. The method includes at least one outlet-side wall thickness measurement and an automatic adjustment of the value of a speed change of the motors to the tube wall thickness profile. The progression of the speed changes over time of individual or all motors is also automatically adjusted on the basis of the tube wall thickness measured values.
Claims5
A method for controlling a stretch-reducing mill in which tube ends of stretched tubes are optimized by controlling motors of the stretch-reducing mill by a programmable logic controller, comprising:
- measuring outlet-side wall thicknesses of the stretched tubes by a sensor that is operatively connected to the programmable logic controller;
- and
- automatically adjusting speed changes of the motors while stretching a following tube based on a tube wall thickness profile of an earlier stretched tube,
- wherein the programmable logic controller calculates, based on the measured wall thicknesses of the earlier stretched tube, for each of the speed changes of individual ones of the motors
- a start time of the speed change,
- an end time of the speed change, and
- a rate of speed change.
Dependencies are inferred from the claim text.