Work Roll Bearing Grease Selection — Going Beyond the Data Sheets

2021 ◽  
Author(s):  
M. Allega ◽  
K. Mistry
Keyword(s):  
Work Roll ◽  
Roll Bearing

scholarly journals Study on Vertical Vibration Characteristics of the 2-DOF Strip Rolling Mill Model with a Single Weak Defect on the Work Roll Bearing Outer Raceway

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Zhengnan Sun ◽  
Dongxiao Hou ◽  
Liang Xu ◽  
Peiming Shi
Keyword(s):  
Rolling Mill ◽  
Rotation Speed ◽  
Single Point ◽  
Work Roll ◽  
Vertical Vibration ◽  
Vibration Characteristics ◽  
Main Resonance ◽  
Strip Rolling ◽  
Rotating Speed ◽  
Roll Bearing

Considering the influence caused by a early single pit defect on the outer raceway of the work roll bearing, a 2-DOF plate strip rolling mill vertical vibration model with a single point weak fault on the outer raceway was established. With the practical parameters of the roughing mill of the 1780 hot continuous rolling mill, the vertical vibration characteristics of the rolling mill work roll with different rotating speed and different single pit defect area on the bearing outer raceway are analyzed by numerical simulation. It is found that with the change of the rotation speed of the work roll, different nonlinear vibration behaviors occurred, such as superharmonic resonance, main resonance, combined resonance and sub-harmonic resonance. Especially the subharmonic resonance of the work roll is more harmful than the main resonance when the work roll speed is twice the rotation speed corresponding to the first and second natural frequency of the rolling mill. This work provides a theoretical basis for further clarifying the effect caused by a early defect of the work roll bearing on the mill vibration.

Air – Oil Lubrication for Work Roll Bearing to Optimise Mills Breakdown

2018 ◽  
Author(s):  
Chiranjan Mandal ◽  
N Mondal ◽  
P Sahana ◽  
Rakesh . ◽  
R Prasad
Keyword(s):  
Work Roll ◽  
Oil Lubrication ◽  
Roll Bearing

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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