A parameters design approach to improve product quality and equipment performance in hot rolling

Younes, M. A.; Shahtout, M.; Damir, M.N.H.

doi:10.1016/j.jmatprotec.2005.06.052

Cited by 23 publications

(17 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For a long time, scholars have carried out a lot of research work on the vibration problem of rolling mill system. [5][6][7] It has been found through research that the most direct and most prominent influence on the quality of rolled products of metal plates is the lateral vibration of rollers. Panjković 8) found that the frictional conditions between roller gaps are main causes of fluttering in rolling mill, and the occurrence of flutter causes marks on rollers, which will cause the subsequent rolling process to continue fluttering.…”

Section: Nonlinear Vibration Characteristic Analysis Of Roller-plate mentioning

confidence: 99%

Nonlinear Vibration Characteristic Analysis of Roller-Plate System Based on Asymptotic Methods

et al. 2020

View full text Add to dashboard Cite

A roller-plate system is taken as the research object in this paper. The influence of rolled products of metal plates (thick or middle thick plate) as an excitation parameter on the vibration characteristics of the system during warm rolling process is mainly studied. In view of the hysteresis characteristics between rolling force and deformation of rolled products of metal plates in actual process, Duffing equation is innovatively introduced into the dynamic model and used to generate nonlinear force. The analytical solution of the dynamic model of the roller-plate system is obtained by asymptotic methods, and the correctness of the analytical solution is verified by Runge-Kutta method. Finally, the influence of nonlinear stiffness and nonlinear damping on vibration characteristics of rollers is analyzed, which provides an important theoretical basis for the study of nonlinear vibration characteristics and vibration suppression of rollerplate system during warm rolling.

show abstract

Section: Nonlinear Vibration Characteristic Analysis Of Roller-plate mentioning

confidence: 99%

Nonlinear Vibration Characteristic Analysis of Roller-Plate System Based on Asymptotic Methods

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, the traditional PID controller is very sensitive to model parameter variation [21]. In order to improve control precision, an online HGC identification strategy will be put forward in this section, and the HGC system based on GPC will be designed.…”

Section: Hgc System Based On Gpcmentioning

confidence: 99%

Identification and optimization for hydraulic roll gap control in strip rolling mill

Sun

Chen

Han

et al. 2015

J. Cent. South Univ.

View full text Add to dashboard Cite

In order to improve the control performance of strip rolling mill, theoretical model of the hydraulic gap control (HGC) system was established. HGC system offline identification scheme was designed for a tandem cold strip mill, the system model parameters were identified by ARX model, and the identified model was verified. Taking the offline identified parameters as the initial values, online identification using recursive least square was carried out with model parameters changing. For the purpose of improving system robustness and decreasing the sensitivity due to model errors, the HGC system based on generalized predictive control (GPC) was designed, and simulation experiments for traditional controller and GPC controller were conducted. The results show that both controllers acquire good control effect with model matching. When the model mismatches, for the traditional controller, the overshot will increase to 76.7% and the rising time will increase to 165.7 ms, which cannot be accepted by HGC system; for the GPC controller, the overshot is less than 8.5%, and the rising time is less than 26 ms in any case.

show abstract

“…According to low rotational frequency of payoff and pickup reels it is assumed that they do not introduce any velocity variations to the strip at entry to or exit from the roll gap. 5,9,14,18,34,35) Variation in tension directly depends on the stiffness of the strip at entry to or exit from the roll gap which is a linear function of the strip length. Therefore a single stand negative damping model could be attained by applying a constant velocity as the boundary condition both for entry and exit material as shown in Fig.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

Experimental Investigations and ALE Finite Element Method Analysis of Chatter in Cold Strip Rolling

et al. 2012

View full text Add to dashboard Cite

Chatter is the most important limitation in high speed rolling of thin strips in modern industrial cold rolling mills. To study chatter in rolling, it is necessary to set up models for the rolling process as well as the mill stand. Existing models of the rolling process are analytic and are based on many simplifying assumptions. In current work Arbitrary Lagrangian Eulerian (ALE) finite element method is utilized for the first time to model the chatter vibrations in rolling, which relaxes many of these assumptions. The model has the benefit of mass translation to computational region by using ALE technique, which tremendously reduces huge computational requirements of the common Lagrangian models. The presented model is updated for simulating the chatter mechanism by means of some online velocity sensors and signal filtering method in applying the ALE boundary conditions. Results of the finite element model were compared with the experimental measurements obtained from a full scale industrial mill. Two main chattering characteristics, i.e., the critical rolling speed and the chatter frequency, obtained from the simulation program were found to be in good agreement with that of the experimental measurements.

show abstract

A parameters design approach to improve product quality and equipment performance in hot rolling

Cited by 23 publications

References 4 publications

Nonlinear Vibration Characteristic Analysis of Roller-Plate System Based on Asymptotic Methods

Nonlinear Vibration Characteristic Analysis of Roller-Plate System Based on Asymptotic Methods

Identification and optimization for hydraulic roll gap control in strip rolling mill

Experimental Investigations and ALE Finite Element Method Analysis of Chatter in Cold Strip Rolling

Contact Info

Product

Resources

About