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 ...
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 ...
Quantitative Evaluation Method of Shape Indicator for Cold-Rolled …
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 …
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.
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.
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.
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 ...
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 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 …
Comprehensive shape control technology for CSP hot strip …
2 Shape control conditions of strips in CSP hot strip mills. The CSP technology was commissioned at Liansteel at the end of 2003, and its main product structure focuses on the thin strip. The proportions of the hot rolled strips with a thicknesses of less than 2.0 mm and 1.5 mm are over 40% and 15%, respectively.
Transverse thickness profile control of electrical steel in 6-high cold
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 …
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 …
Robust shape control in a sendzimir cold-rolling …
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, …
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 …
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 …
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 …
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 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 …
Robust shape control in a sendzimir cold-rolling steel mill
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.
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 ...
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 ...
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 ...
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 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 …
Shape Control Systems for Sendzimir Cold-rolling Steel Mills …
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 …
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 …
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.
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;
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 ...
Research and Development Trend of Shape Control …
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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 …