This paper deals with the shape control methodology for Sendzimir cold-rolling steel mills. Due to the several problems which come from the Sendzimir mills' complicate structure, designing automatic shape control system for these mills was one of the main control issues in cold rolling industries. The multi-variable problem and model …
Deals with the problem of shape (or flatness) control for Sendzimir 20-roll cold-rolling steel mills. Such mills, with a variety of shape actuators, offer the control …
Hot-rolled steel strip has been one of the most widely used industrial raw materials. ... Based on the strip shape theory and the actual shape control capability of the CVC mill, the combination of CVC shifting position and bending force that can meet the target roll gap profile is always diverse. ... Jia SH, Zeng W (2018) Integrated design of ...
The shape control problem for a Sendzimir 20-roll cold rolling steel mill is characterised by operation over a wide range of conditions arising from roll changes, changes in rolling schedules and changes in material gauge, width and hardness. Previous approaches to the problem suggest storing a large number of precompensator matrices …
It is a complicated problem for cold-rolled strip to improve asymmetric strip shape in strip production. A roll system and strip coupled model of six-high cold rolling mill was established with finite element method to estimate the effect of intermediate roll shifting, tilting, symmetric and asymmetric bending technologies on strip profile.
Abstract: This paper deals with the shape control methodology for Sendzimir cold-rolling steel mills. Due to the several problems which come from the Sendzimir mills' complicate …
Edge drop control characteristics of the taper-work roll contour for six-high cold mill. ORIGINAL ARTICLE. Published: 04 April 2023. Volume 126, pages …
To study the control schemes of asymmetric strip shape, the roll system and strip coupled model of a six-high cold rolling mill is established with finite el- ement method. In this work, monitoring character- istics of strip shape are discussed, and control schemes of asymmetric strip shape are also given, including tilting and asymmetrical ...
Quarter-wave flatness defect often appears in the DP980 cold rolling process, seriously affecting product quality. To find the causes of this kind of flatness defect, a multi-pass finite element model (FEM) based on a 2130 UCM mill was established, and the accuracy of the model was verified by three methods. The simulation results of the …
Section snippets Structure of a 6-high stand. Each rolling stand of the mill is composed of a stack of rolls. For a 6-high mill the rolls are named respectively work roll – WR (i.e. the roll in contact with the material), back-up roll – BUR (the biggest roll at the top controlled by an hydraulic cylinder) and the intermediate roll – IR, placed in the middle …
The shape control of the cold rolling process is realized by equipment technology, including the series of 6-high crown control mill technology [ 4 ], pair …
The production process of cold rolled wide titanium strip is shown in Fig. 1, including hot rolled coils annealing→ acid pickling after annealing → cold rolling with a 20-high mill → annealing in the middle pass → acid pickling after annealing → cold rolling with a 20-high mill → vacuum annealing → tension and straightening inspection → final cold …
Robust Shape Control in a Sendzimir Cold-Rolling Steel Mill 1651 Note that, by virtue of the parameterisation in eq. (9), no attempt is made to control the high-order profiles, which accords with normal rolling practice. Parametric shape variations (with desired values of zero), which are shown as the output in Fig. 5, are given in Fig. 9.
The cold-rolled strip steel is a high-end fine steel product, mainly used in high-end automotive and home appliances, electrical and electronics, rail transit and other industries, and the shape (flatness) is an important quality index. Online detection and control of plate shape is the core key technical problem of large-scale cold-rolling ...
When it comes to producing steel in a cold rolling mill, optimizing shape and flatness is critical in order to create the best surface quality. To achieve this you need an effective roll cooling process in place to reduce defects …
To this day, research on the flatness control of cold-rolled strips is still being refined and improved ... Wang et al. proposed a combination shape control strategy for the strip's deficiency of quartic term shape control in a 6-high cold rolling mill to achieve fast and accurate control of flatness defects. However, these studies are mainly ...
The accurate control systems of strip shape and edge-drop have been developed for the new tandem cold rolling mill in Yawata Works, which has 5 stands of 6 Hi-UC·WR shift mill.
Non-Reversing Single Stand Cold Mill. Technical Data: Material: 1xxx～6xxx series. Product thickness: min.0.1 mm. Width range: 1,000mm～2,150 mm. Max Rolling Speed: 2,000 m/min. Our Solution: …
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WEBThe application shows that the optimized bending force setting value decreases the average shape high point from 16 to 8 IU in actual production, which can …
The traditional shape control of the silicon steel strip is close to the process of finished strip steel—cold rolling process. The shape control of the cold rolling process is realized by equipment technology, including the series of 6-high crown control mill technology, pair crossed rolling mill technology, taper work roll shift (T-WRS ...
nition and control for cold-rolled strip. Journal of Iron and Steel. Research, 2013, 25(12): 2–7. (in Chinese) ... 6-high cold tandem mill based on shape control ability. Journal. of Central ...
What is handled in tltis paper is, an automatic shape controller, which is developed to minimize tlle fluctuation of shape deviation and to gel symmetric shape. …
In order to meet the shape control requirements of "dead flat" transverse thickness profile of electrical steel sheet in cold rolling process, the 3D finite element model (FEM) for roll stacks and strip of 6-high tandem cold rolling mills (TCMs) was built with the developed Edge Drop Control Work Rolls for Non-shifting (EDW-N). The efficiency …
To determine the exact distribution of tensile stress in a cold rolled strip, tensile stress evolution caused by lateral uneven velocity distribution outside the deformation zone of the strip is examined. The finite difference method is employed to solve the problem. Different factors, including the strip width and the form and amplitude of the …
The shape control problem for a Sendzimir 20-roll cold rolling steel mill is characterised by operation over a wide range of conditions arising from roll changes, changes in rolling schedules and changes in material gauge, width and hardness.
Abstract— This paper deals with the problem of shape (or flat-. ness) control for Sendzimir 20-r oll cold-rolling steel mills. Such. mills, with a variety of shape actuators, offer the control ...
Quantitative level evaluation of cold-rolled strip was significant for the shape control and the product structure optimization. Based on the probability statistics method and the shape pattern recognition method, the shape evaluation model of cold-rolled strip was established to evaluate real-time shape of the online strip. The model was …
As shown in Fig. 1, a UCMW cold rolling mill has a wealth of shape control methods that can achieve multi-index and high-precision shape control effects such as edge drop, crown, and flatness. T-WRS technology further strengthens the ability of UCMW cold rolling mill to control edge drop . The combined movement of the taper-work roll …
Research on Flatness On-Line Intelligent Control for the Wide Strip Steel Cold Mill [D]. Qinhuangdao: Yanshan University, 2008 (in Chinese). ... PENG Yan, ZHENG Zhen-zhong, LIU Hong-min. Simulation Research of Cold Rolled Strip Shape Control in 6-Roller HC Mill [J]. China Mechanical Engineering, 2000, 11(9): 1061 (in Chinese).
Keywords: UCMW cold rolling mill; finite element simulation; roll gap friction; shape control 1. Introduction In recent years, with the increasing of downstream manufacturers' requirements on the quality of cold-rolled strip products, the shape quality requirements on cold-rolled strips have become more stringent.
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