Lightweight Work Roll Flattening Model for Severe Rolling Conditions

2020 ◽  
Author(s):  
P. Schaeffer ◽  
B. Braho
Keyword(s):  
Work Roll ◽  
Roll Flattening

A New Method Predicting Contact Length and Flattening in Temper Rolling

2016 ◽  
Vol 716 ◽  
pp. 605-613 ◽  
Author(s):  
Joonas Ilmola ◽  
Aarne Pohjonen ◽  
Jari Larkiola ◽  
Jari Nylander
Keyword(s):  
Rolling Force ◽  
Steel Strip ◽  
Current Trend ◽  
High Strength Steels ◽  
High Strength ◽  
Work Roll ◽  
Contact Length ◽  
Temper Rolling ◽  
Roll Flattening ◽  
Gap Models

The current trend in temper rolling is to make a small reduction to steel strip in order to achieve higher strength with good formability and toughness. In addition, very high strength steels can be cold rolled twice with very small reductions. This causes problems in setup values for cold rolling. Rolling models are usually overestimating roll flattening in the case of small reductions.In temper rolling thickness reduction is small (0.5 – 3%) and the elastic deformation of the work roll should be taken into account [3]. However, standard circular arc roll gap models (e.g. Bland Ford Ellis combined with Hitchcock model) fail to predict the roll flattening and thus the rolling force [4]. In this work, finite element method has been used to define a simplified model for work roll flattening and contact length. Model describes the effect of reduction, strength of steel strip and roll radius.

Prediction of Rolling Force during Temper Rolling

2008 ◽  
Vol 575-578 ◽  
pp. 584-588
Author(s):  
Jari Larkiola ◽  
Jari Nylander ◽  
V. Kähkönen ◽  
M. Judin
Keyword(s):  
Rolling Force ◽  
Work Roll ◽  
Rolling Process ◽  
Contact Length ◽  
Temper Rolling ◽  
Process Data ◽  
Element Analysis ◽  
Skin Pass ◽  
Roll Flattening ◽  
Analysis Laboratory

In temper rolling thickness reduction is small (0,5 – 2%) and the elastic deformation of the work roll should be taken into account. During finishing rolling, classical cold rolling theories fail to predict the roll flattening and thus the rolling force. Numerous different mathematical models have been developed for temper rolling process. However, often the non-circular theories are computationally expensive and the range of usability is questionable. In this study, elasto- plastic finite element analysis, laboratory rolling tests and inverse computing from skin pass mill process data has been carried out. The aim is to find the roll shape, contact length and the rolling force to create a simplified model for controlling of temper rolling. In addition, the ability of different skin pass rolling theories has been compared with measured process values.

Flatness Feed-Forward Control Model Based on Neural Networks

2014 ◽  
Vol 989-994 ◽  
pp. 3386-3389
Author(s):  
Zhu Wen Yan ◽  
Hen An Bu ◽  
Dian Hua Zhang ◽  
Jie Sun
Keyword(s):  
Neural Networks ◽  
Rolling Mill ◽  
Rolling Force ◽  
Work Roll ◽  
Control Model ◽  
Good Effect ◽  
Feed Forward ◽  
Force Fluctuations ◽  
Feed Forward Control ◽  
Roll Bending

The influence on the shape of the strip from rolling force fluctuations has been analyzed. The combination of intermediate roll bending and work roll bending has been adopted. The principle of rolling force feed-forward control has been analyzed. The feed-forward control model has been established on the basis of neural networks. The model has been successfully applied to a rolling mill and a good effect has been achieved.

Experimental study on wear and friction of work roll material with 4% Cr and added Ti in cold rolling

Wear ◽  
2011 ◽  
Vol 271 (9-10) ◽  
pp. 2500-2511 ◽  
Author(s):  
H.C. Li ◽  
Z.Y. Jiang ◽  
A.K. Tieu ◽  
W.H. Sun ◽  
D.B. Wei
Keyword(s):  
Experimental Study ◽  
Cold Rolling ◽  
Work Roll ◽  
Wear And Friction

Study on Roll Wear Model for Hot Strip Mill

2012 ◽  
Vol 535-537 ◽  
pp. 697-700
Author(s):  
Zhong Feng Guo ◽  
Jun Hong Hu ◽  
Xue Yan Sun
Keyword(s):  
Work Roll ◽  
Hot Strip Mill ◽  
Rolling Schedule ◽  
Wear Model ◽  
C Language ◽  
Hot Strip ◽  
Roll Wear ◽  
Calculation Results ◽  
Strip Length ◽  
Good Agreement

Roll wear model for Hot Strip Mill (HSM) was researched and the factors affect roll wear are analyzed. The simulation program was compiled by program visual C++ language and work roll wear was calculated according to the rolling schedule. Calculation results shows that roll wear like box shape. Strip width affects roll wear clearly. The strip length is one of the important issues which affect roll wear. Work roll wear of F7 top roll middle get to 280μm after a rolling schedule. Roll wear curve calculated by program were good agreement with the wear curve got by high-precision grinder. The results show that the roll wear model has high accuracy.

scholarly journals Finite elements prediction of thermal stresses in work roll of hot rolling mills

2010 ◽  
Vol 2 (1) ◽  
pp. 707-716 ◽  
Author(s):  
D. Benasciutti ◽  
E. Brusa ◽  
G. Bazzaro
Keyword(s):  
Finite Elements ◽  
Hot Rolling ◽  
Thermal Stresses ◽  
Work Roll ◽  
Rolling Mills
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