shape control in cold rolled mill
Allowable variation of cold-rolled strip transverse profiles …
The formation mechanism of the cold-rolled strip shape with high tension was studied. An advanced method to calculate the allowable variation of strip transverse profiles was established by the strip buckling criterion, which can be more properly used in cold rolling. With this method, the aim allowable variation of the product strip transverse …
Non-oriented Silicon Steel for UCMW Cold Rolling Mill
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.
Robust shape control in a sendzimir cold-rolling steel mill
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 to cater ...
Research on quarter wave shape control of cold rolled …
The problem of quarter waves is more fundamental in the production of cold rolled high strength steel, which harms the quality of the strip shape. To reasonably and maximally exploit the quarter wave shape control capability of the cold rolling six-roller UCM mill, this paper establishes a BP-MOPSO-based shape optimization model for the 65MN ...
Widest Cold Rolling Mill for Automotive Steel
Pickled coils are rolled in twin stand cold rolling mill where they are processed into a specified thickness. Generally, the rolling reduction ratio is 50% to 90%. ... Auto shape control using shape meter rolls on both sides; Laser velocity meter for better speed accuracy; Level 2 mathematical modeling and connectivity to Level 3;
Cold Rolling – Process Overview
Modern, efficient cold rolling mills can roll pickled sheets or strips at speeds of up to 4 m/s and tandem mills that are continuously working can produce up to 2.5 million tons of cold rolled steel annually. The advantages of cold rolling. Cold rolled products have the following advantages over hot rolled: greater dimensional accuracy ...
Research and application of approximate rectangular section control …
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 ...
Optimization of CVC shifting mode for hot strip mill based
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 ...
Analysis of thrust force in a work roll shifting mill
The shape control mill has been widely used in modern continuous cold rolled strip production line due to the users' high requirement of strip shape quality [1], [2], [3]. Compared with other mills, the work roll shifting mill, such as the high crown (HC) mill and the continuous variable crown (CVC) mill, is considered the most effective mill ...
Intelligent shape control for the whole roll of large cold …
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 ...
A static model of a Sendzimir mill for use in shape control
The object of shape control is to adjust the mill so that the rolled strip is free from internal stresses. Both static and dynamic models of the mill are required for the control system design.The subject of this thesis is the static model of the Sendzimir cold rolling mill, which is a 1-2-3-4 type cluster mill.
Optimization-based automatic flatness control in cold …
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 …
Research on quarter-wave control in DP980 steel during cold …
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 …
Shape control systems for Sendzimir steel mills
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 …
Shape Control Systems for Sendzimir Cold-rolling Steel …
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.
Innovations in Shape Measurement and Control for …
The shape control system coordinates and adjusts the available mill actuators to induce a transverse pressure distribution within the roll bite that causes the on-line, measured stress
Analysis of Shape Control Characteristics for UCMW …
problem of high precision shape quality of cold-rolled strips, J. G. Cao et al. [17] proposed a control strategy which is a whole-unit integrated shape for the strip cold rolling mill.
Control Strategies of Asymmetric Strip Shape in Six-High Cold Rolling Mill
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 ...
Control Strategies of Asymmetric Strip Shape in Six-High Cold Rolling Mill
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 ...
Shape control systems for Sendzimir steel mills
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 ...
Prediction of shape defects over length of cold rolled sheet …
Abstract A model based on an artificial neural network (ANN) has been developed for prediction of flatness of cold rolled (CR) sheet in a tandem cold rolling mill for white goods applications. Various process parameters including roll bending, roll shifting, tensions between stands etc., which affect flatness of CR sheet are considered in the …
Tensile Stress Evolution Outside Deformation Zone of Cold Rolled …
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 …
Aluminum Cold Rolling 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: …
Research and Development Trend of Shape Control …
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Research and Development Trend of Shape Control for …researchgateFlatness control of cross-bowed hot plate using cold …researchgateRecommended to you based on what's popular • FeedbackResearch on quarter wave shape control of cold …
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 …
Theory-Intelligent Dynamic Matrix Model of Flatness Control for Cold
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).
Shape and Flatness in the Cold Rolling Process
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 …
Generation mechanism of quarter buckle in hot-rolled …
These are the reasons why there is less research on the shape control of hot-rolled temper mills at home and abroad. Ma et al. ... used the rigid-plastic finite element method to study the influence of process parameters on deformation for a cold-rolled temper mill. Because the rolling reduction is small, the deformation of the strip thickness ...
A neural network-based shape control system for cold …
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.
Modeling and validation of bending force for 6-high tandem cold …
A shape meter is configured at the end stand exit to provide closed-loop control of the strip flatness at the exit of the end stand. In fact, for the broadband steel cold rolling mill, cold-rolled products with high order and local flatness defects due to unreasonable bending force presetting occur from time to time, as shown in Fig. 4.
Research and application of approximate rectangular …
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 …
Metals | Free Full-Text | Research on Shape Control …
Therefore, rolling mills with high-precision shape control ability have been more and more widely used. The UCMW (Universal …
Simulation of fuzzy shape control for cold-rolled strip with …
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.
Automation for Shape Control in Stainless Cold …
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. …
Robust Shape Control in a Sendzimir Cold-Rolling Steel Mill
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.
Research on the generation and control of high-order
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 …