Data-Based Hybrid Tension Estimation and Fault Diagnosis of Cold Rolling Continuous Annealing Processes

2011 ◽  
Vol 22 (12) ◽  
pp. 2284-2295 ◽  
Author(s):  
Qiang Liu ◽  
Tianyou Chai ◽  
Hong Wang ◽  
Si-Zhao Joe Qin
Keyword(s):  
Fault Diagnosis ◽  
Cold Rolling ◽  
Continuous Annealing

scholarly journals A study of nonlinear coupling dynamic characteristics of the cold rolling mill system under different rolling parameters

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401771370 ◽  
Author(s):  
Hai Xu ◽  
Ling-Li Cui ◽  
De-Guang Shang
Keyword(s):  
Fault Diagnosis ◽  
Cold Rolling ◽  
Dynamic Characteristics ◽  
Rolling Mill ◽  
Vibration Amplitude ◽  
Strip Thickness ◽  
Drive System ◽  
Nonlinear Coupling ◽  
Cold Rolling Mill ◽  
Coupling Dynamic

The dynamic characteristics of the mill and the drive system are mutually coupled and affected closed-loop system. However, most research has considered only the vibration of the drive system or the vibration of the mill to determine the cause of the accident in the equipment condition monitoring and fault diagnosis process. Condition monitoring and fault diagnosis based on this type of approach can lead to misdiagnosis or missed diagnosis in determining faults in actual systems. So, in this study, a dynamic model of the coupling between a mill and its drive system was developed to study the interaction of the mill and the drive system with the goal of increasing the accuracy of diagnostic methods and to improve the quality of the rolled material. A nonlinear coupling dynamic model was formulated to represent the relation between the gearbox vibration amplitude and various time-varying parameters to study the effects of various parameters on the drive system vibration characteristic under unsteady lubrication. Simulations results showed that increasing the strip speed, the input strip thickness, or the output strip thickness or decreasing the lubricating oil temperature or the roller radius caused the vibration amplitude of the drive system to increase. The vibration frequency caused by variations in the strip inlet or outlet thickness can be transmitted to the drive system, and gear meshing frequency of the gearbox can be transmitted to the mill. Test data from an actual cold rolling mill verified the accuracy of the model. The model was shown to be capable of simulating the mutually coupled and affected mechanism between a mill and its drive system.

A study on the fault diagnosis of the 3-d roll shape in cold rolling

2004 ◽  
Vol 18 (12) ◽  
pp. 2174-2181 ◽  
Author(s):  
Chang Woo Lee ◽  
Hyun Kyoo Kang ◽  
Kee Hyun Shin
Keyword(s):  
Fault Diagnosis ◽  
Cold Rolling ◽  
Roll Shape

Development and Application of Experimental Facilities for Steel Forming

2008 ◽  
Vol 575-578 ◽  
pp. 1428-1432
Author(s):  
Zong An Luo ◽  
Guo Dong Wang ◽  
Xiang Hua Liu ◽  
Jian Ping Li ◽  
Li Jun Wang ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Hot Rolling ◽  
Cooling System ◽  
Continuous Annealing ◽  
Controlled Cooling ◽  
Processing Technologies ◽  
Iron And Steel ◽  
Rolling Mills ◽  
Cold Rolling Mills ◽  
Experimental Facilities

In order to meet the demand of steelmakers, series of experimental facilities such as thermo-mechanical simulator, pilot hot rolling mills, controlled cooling system, pilot cold rolling mills, simulator for continuous annealing of strips, and hot-dip galvanizing simulator have been developed and applied by the RAL. These instruments can be used to simulate different processing technologies of steel forming which include continuous casting, hot rolling, controlled cooling, cold rolling, annealing and surface treatment(such as coating), etc. They provide unique research means for the R&D activities of China’s iron and steel industries. The characteristics, experimental functions, performance parameters and application of these facilities are introduced in the paper.

Effect of Ferritic Hot Rolling Process on Microstructure and Properties of IF Steel

2020 ◽  
Vol 993 ◽  
pp. 505-512
Author(s):  
Wen Gao Chang ◽  
Wei Yu ◽  
Huan Yang ◽  
Zeng Qiang Man ◽  
Yun Fei Cao
Keyword(s):  
Cold Rolling ◽  
Hot Rolling ◽  
Rolling Texture ◽  
Rolling Process ◽  
Continuous Annealing ◽  
If Steel ◽  
Coiling Temperature ◽  
Microstructure And Properties ◽  
Hot Rolling Process ◽  
Cold Rolling And Annealing

The effect of ferritic hot rolling process on microstructure and properties of Ti microalloyed IF steel was investigated. The hot rolling-coiling, cold rolling and continuous annealing processes of ferritic zone were physically simulated. The influence of thermal deformation (finishing rolling temperature, coiling temperature) on the structure, texture and forming properties of Ti-If steel was studied through tensile test, EBSD, XRD and other analytical methods. The results showed that the recrystallization occurred after hot rolling and coiling in the ferritic region. Weak α-fiber and weak γ-fiber were obtained in the central layer of hot rolling plates, and the strength of γ-fiber was higher when finished rolling at low temperature. α-fiber and weak γ-fiber were strengthened after cold rolling. After annealing, the α-fiber was weakened and the γ-fiber was strengthened, and the γ-fiber became the main texture. The larger and more uniform grain size and better mechanical properties were obtained by IF steel finished rolling and coiling at high temperature and after continuous annealing, reaching yield strength of 106 MPa, tensile strength of 297 MPa, elongation rate of 52%, n value of 0.26 and r value of 2.3. The hot rolling texture is hereditary. If the more γ-fiber is formed after hot rolling, the more γ-fiber recrystallization texture is formed after cold rolling and annealing.

Study of Texture in 6016 Aluminum Alloy during Processing

2016 ◽  
Vol 877 ◽  
pp. 356-362
Author(s):  
Zhang Wen ◽  
Ying Ying Liu ◽  
Zhi Hong Jia ◽  
Pi Zhi Zhao ◽  
Zhi Qing Zhang ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Shear Bands ◽  
Deformation Texture ◽  
Continuous Annealing ◽  
Intermediate Annealing ◽  
X Ray Diffraction ◽  
6016 Aluminum Alloy ◽  
Cold Rolled ◽  
Hot Rolled ◽  
Rolled Plates

The evolution of texture in AA6016 alloy during processing was systematically investigated. The hot-rolled 6016 plates were cold-rolled to 0.9mm through three different rolling processes. One was directly rolled to 0.9mm, the other two were rolled to 1.8mm and 2.3mm, respectively, followed by intermediate annealing at 360°C for 2h, and then rolled to 0.9mm. Finally, the three kinds of cold rolled plates were performed continuous annealing at 560oC. The textures and microstructures of each stage were characterized by the X-ray diffraction and electron back scattering diffraction (EBSD) techniques. The results show that the texture of hot-rolled sample is mainly composed of Brass, S and Copper; the relative amount and maximum density changed after 1st cold-rolling. After intermediate annealing, the Cube and Cube+ND20 texture replace the deformation texture and rise with the rolling reduction. Then the conducting of final cold rolling results in the decrease of Cube and Cube+ND20 component and increase of deformation texture. After the continuous annealing, R, Brass-R, Goss, Cube and Cube+ND20 components are observed. Particle stimulated nucleation (PSN) and nucleation at shear bands dominate the competition of recrystallization.

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