A method and system for automatic identification of roll eccentricity based on hot-rolled strip rolling force

Abstract

The invention discloses a method and system for automatically identifying roll eccentricity based on the rolling force of hot-rolled strip steel. The method includes: acquiring rolling force fluctuation data of the rolling mill along the length direction of the strip steel; calculating the circumference of each roll according to the roll diameter Interval rolling force fluctuation data; calculate the similarity of the rolling force fluctuation data in the adjacent two roll circumference intervals; score the calculated similarity according to the standard threshold to obtain the roll eccentricity state score, by combining the roll eccentricity state score with The preset threshold value is relatively large to determine whether there is roll eccentricity. The invention can calculate the similarity information of the rolling force fluctuation in the strip length direction in real time, automatically judge whether there is roll eccentricity in the rolling mill according to the recognition algorithm, and provide a data basis for the timely discovery of the rolling mill roll defects on the production site.

Description

technical field [0001] The invention relates to the technical field of hot-rolled strip steel quality control, in particular to an automatic identification method and system for roll eccentricity based on hot-rolled strip steel rolling force. Background technique [0002] Roll eccentricity is mainly caused by the non-circularity of the shape of the roll and roll bearing, and the causes generally come from the process of equipment manufacturing, wear and thermal expansion of the roll. The eccentricity of the roll will cause periodic fluctuations in the thickness of the rolled piece, which will reduce the control accuracy of the AGC (Automatic Thickness Control) system, resulting in a large deviation in the thickness of the finished product. Therefore, how to automatically identify the data related to roll eccentricity, and judge whether the roll is eccentric, and provide help for timely troubleshooting of equipment and production failures at the production site, is of great s...

AI Technical Summary

Problems solved by technology

However, most of the current algorithms do not carry out a detailed analysis of the degree of roll eccentricity. There is no corresponding index for which degree of roll eccentricity will affect the normal rolling of the strip, and when it is judged when the roll eccentricity does not meet the corresponding standards. The extraction of the quantity generally requires no-load pressure on the roll, and the calculation is carried out by collecting relevant data of the roll under no-load. There is not much research on the real-time change of the eccentricity of the roll during the rolling process.

Images