scholarly journals Online Roll Force Model for Non-Oriented Electrical Steel Considering Temperature-Transformation-Roll Force Coupling Effect

2020 ◽  
Vol 61 (4) ◽  
pp. 641-646
Author(s):  
Chao Liu ◽  
Anrui He ◽  
Zhenli Mi ◽  
Wenquan Sun ◽  
Yong Song
Keyword(s):  
Electrical Steel ◽  
Coupling Effect ◽  
Force Model ◽  
Roll Force ◽  
Force Coupling ◽  
Temperature Transformation

Control Methods for a Hot Steel Rolling Mill: An Application of Learning Theory and Pattern Recognition

1980 ◽  
Vol 102 (2) ◽  
pp. 118-122 ◽  
Author(s):  
A. A. Desrochers ◽  
G. N. Saridis
Keyword(s):  
Pattern Recognition ◽  
Rolling Mill ◽  
Feedforward Control ◽  
Adaptive Controller ◽  
Force Model ◽  
Control Methods ◽  
Roll Force ◽  
Steel Rolling ◽  
Pattern Recognition Methods ◽  
Roll Gap

This paper presents roll force control methods to be used with the predictive force setup model of the finishing stands in a hot steel rolling mill. Current mill practices achieve a desired strip gauge by using a predictive force model to setup the roll gaps on the finishing stands. At any time before the steel enters the first finishing stand a human operator may modify the roll gap settings if it is felt that under the present conditions the force predicted by the setup model is going to be unacceptable. In this paper, the decision process of the operator is modelled by pattern recognition methods to obtain this extra degree of feedforward control. In addition, feedback control is provided from one steel run to the next by an adaptive controller which uses a linear reinforcement learning scheme to adjust its parameters. Results are presented from actual mill data.

Vibration Localization in a Fluid-Loaded Rectangular Plate with Rib Irregularity

2012 ◽  
Vol 226-228 ◽  
pp. 191-194
Author(s):  
Hao Hao Hu ◽  
De Jiang Shang
Keyword(s):  
Coupling Effect ◽  
Coupled System ◽  
Expansion Method ◽  
Heavy Fluid ◽  
Range Interaction ◽  
Modal Expansion ◽  
Vibration Localization ◽  
Modal Expansion Method ◽  
Force Coupling ◽  
Long Range Interaction

This paper studies the vibration localization of fluid-loaded irregularly ribbed plate analytically. The modal expansion method was adopted to solve the multi-coupled system, the ribs were considered as Timoshenko beams attached to the plate. The localization mechanism was investigated by comparing different coupling effect at the plate-beam interface, it was found the ribs space irregularity only localize the modes associated with the shear force coupling. Both the light and heavy fluid loading pressure were concerned by Rayleigh integral , the study showed that obvious vibration localization phenomenon can be achieved by the ribs space irregularity, and the localization effect was weakened by the long range interaction through the heavy fluid, although the response amplitude of the modes decreased obviously. The investigation may be quite significant for vibration confinement and noise control in engineering.

A novel vibration system based on instantaneous motion centre for high accuracy dynamic balancing measurement of outboard rotor

2009 ◽  
Vol 223 (2) ◽  
pp. 387-395 ◽  
Author(s):  
Q Peng ◽  
C Ping
Keyword(s):  
Coupling Effect ◽  
Separation Performance ◽  
Vibration System ◽  
Beam Structure ◽  
Dynamic Balancing ◽  
Term Operation ◽  
Force Coupling ◽  
In Series ◽  
Separation Performances ◽  
Balancing Efficiency

To overcome the disadvantages of the traditional vibration system used in a horizontal dynamic balancing machine, based on the principle of the instantaneous motion centre in theoretical mechanics, a novel two-degree-of-freedom vibration system comprising two non-parallel four-bar linkages in series is designed to improve the plane separation effect and minimum achievable residual unbalance for dynamic balancing measurement of an outboard rotor. The structure characteristics and unbalancing response of this vibration system are analysed in depth. The plane separation equations are derived. Theoretical analyses show that this vibration system integrates the advantages of both the overhanging beam structure and simple-supported beam structure, and its vibration centre keeps at the instantaneous motion centres, with the result that the balancing efficiency and plane separation performances are improved. Moreover, to improve the sensitivity of the vibration system, the distance between measuring planes is increased by adjusting the angles of two four-bar linkages. The transducers are installed on the same measuring plane; thus, the performance difference in transducers caused by environment fluctuation is reduced and the force coupling effect is eliminated. The result for this vibration system in long-term operation is a more accurate measurement with a lower requirement for a second correction run. The final experimental results validate the superiority of this vibration system in plane separation performance, minimum achievable residual unbalance, and repeatability.

Study on the Two-Side Direction Burr in Grinding-Hardening Machine Based on Orthogonal Experimental Method

2012 ◽  
Vol 217-219 ◽  
pp. 1869-1873 ◽  
Author(s):  
Ju Dong Liu ◽  
Wei Yuan ◽  
Jin Kui Xiong ◽  
Zhi Long Xu ◽  
Song Wei Huang
Keyword(s):  
Coupling Effect ◽  
Orthogonal Experiment ◽  
Depth Of Cut ◽  
Actual Application ◽  
Grinding Method ◽  
Force Coupling ◽  
Grinding Hardening ◽  
Table Speed ◽  
Significant Factors

Based on the orthogonal experiment, this paper studied the influences of depth of cut ap, table speed vw and grinding method gm on the two-side direction burr in grinding-hardening machine. The results show that, with thermal-force coupling effect induced in the grinding-hardening machine, the metal in the workpiece’s surface flowed to two-side direction of the workpiece that without any constraint and leaded to the burr’s formation. The depth of cut ap and grinding method gm are significant factors that affected the size of two-side direction burr, and the significant order are as follows: depth of cut ap> grinding method gm > table speed vw>interaction av. With the increasing of depth of cut ap or the grinding trip, the max size of the two-side direction burr increased gradually; and with the raising of table speed vw, the max size decreased firstly and then increased. In actual application, it should adopted the grinding parameters ap＝0.2mm，vw＝0.6m/min and up-down grinding to improve the quality of grinding-hardening and reduce the size of the burr.

A non-circular arc roll force model for gold rolling

1978 ◽  
Vol 12 (4) ◽  
pp. 643-663 ◽  
Author(s):  
M. J. Grimble ◽  
M. A. Fuller ◽  
G. F. Bryant
Keyword(s):  
Force Model ◽  
Roll Force ◽  
Circular Arc

The Optimization of Roll Force Model in Hot Strip Mill

2014 ◽  
Vol 926-930 ◽  
pp. 3705-3708
Author(s):  
Geng Sheng Ma ◽  
Fang Chen Yin ◽  
Zhu Wen Yan ◽  
He Nan Bu ◽  
Wen Peng ◽  
...  
Keyword(s):  
Prediction Accuracy ◽  
Rolling Force ◽  
Strip Thickness ◽  
Deformation Resistance ◽  
Hot Strip Mill ◽  
Force Model ◽  
Roll Force ◽  
Adaptive Model ◽  
Hot Strip ◽  
High Prediction

The accuracy of roll force model and the rationality of roll fore adaptive model play a key role in obtaining the thickness of strip with high precision. The roll force model has been established. It includes the elastic flattened roller model and deformation resistance model considering the chemical composition of strip. A deformation resistance-based fitting curve is proposed in rolling force adaption, it can be inherited to any other thick range class. Application results show that the rolling force model and its adaptation are with high prediction accuracy and it has improved the strip thickness accuracy.

Evidence for ordered Fe3Ni

1987 ◽  
Vol 45 ◽  
pp. 216-217
Author(s):  
K.B. Reuter ◽  
D.B. Williams ◽  
J.I. Goldstein
Keyword(s):  
Experimental Data ◽  
Martensitic Transformation ◽  
Electron Diffraction ◽  
Room Temperature ◽  
Direct Evidence ◽  
Transformation Product ◽  
Iron Meteorites ◽  
X Ray ◽  
Ni Content ◽  
Temperature Transformation

In the Fe-Ni system, although ordered FeNi and ordered Ni3Fe are experimentally well established, direct evidence for ordered Fe3Ni is unconvincing. Little experimental data for Fe3Ni exists because diffusion is sluggish at temperatures below 400°C and because alloys containing less than 29 wt% Ni undergo a martensitic transformation at room temperature. Fe-Ni phases in iron meteorites were examined in this study because iron meteorites have cooled at slow rates of about 10°C/106 years, allowing phase transformations below 400°C to occur. One low temperature transformation product, called clear taenite 2 (CT2), was of particular interest because it contains less than 30 wtZ Ni and is not martensitic. Because CT2 is only a few microns in size, the structure and Ni content were determined through electron diffraction and x-ray microanalysis. A Philips EM400T operated at 120 kV, equipped with a Tracor Northern 2000 multichannel analyzer, was used.

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