Research on the Entire Roll Type Shape Meter of Cold Rolling Strip and its Industrial Application

2012 ◽  
Vol 572 ◽  
pp. 359-363 ◽  
Author(s):  
Bing Qiang Yu ◽  
Li Po Yang ◽  
Hong Min Liu
Keyword(s):  
Cold Rolling ◽  
Shape Control ◽  
Steel Strip ◽  
Digital Signal ◽  
Strip Surface ◽  
Loop Control ◽  
Technical Requirements ◽  
Roll Type ◽  
Shape Detecting ◽  
Close Loop Control

In order to increase shape measuring precision of cold strip, based on the shape detecting principle and the digital signal technology, a new entire roll type shape meter is developed thorough theoretical analysis and industrial adjustment to develop the shape detecting roll, the shape signal processing method, the original signal compensation mechanism and so on. The shape meter has good performance and stability, which can effectively avoid the scratch of steel strip surface, accurately detect real online strip shape and provide accurate online shape datum for shape control system. It was applied in 1250 mm cold rolling mill, the actual industrial tests prove that the shape signal was stable and reliable, met the harsh condition and the online technical requirements, and could improve shape quality significantly. And the shape close loop control of the 0.18 mm thin cold strip was successful realized.

Research on New Shapemeter of Cold Rolling Thin Strip

2013 ◽  
Vol 710 ◽  
pp. 238-242
Author(s):  
Bing Qiang Yu ◽  
Li Po Yang
Keyword(s):  
Cold Rolling ◽  
Shape Control ◽  
Steel Strip ◽  
Digital Signal ◽  
Thin Strip ◽  
Strip Surface ◽  
Technical Requirements ◽  
Strip Shape ◽  
Industrial Adjustment ◽  
Shape Detecting

Based on the shape detecting principle and the digital signal technology, a new shape meter was developed thorough theoretical analysis and industrial adjustment to develop the shape detecting roll, the shape signal processing method, the original signal compensation mechanism and so on. The shape meter has good performance and stability, which can effectively avoid the scratch of steel strip surface, accurately detect real online strip shape and provide accurate online shape datum for shape control system. It was applied in 1250 mm cold rolling mill, the actual industrial tests prove that the shape signal was stable and reliable, met the harsh condition and the online technical requirements, and could improve shape quality significantly.

Research on Industrial Shape Meter and its Application

2011 ◽  
Vol 311-313 ◽  
pp. 898-901
Author(s):  
Bing Qiang Yu ◽  
Li Po Yang
Keyword(s):  
Signal Processing ◽  
Shape Control ◽  
Signal Transmission ◽  
Strip Surface ◽  
Loop Control ◽  
Hardware System ◽  
Embedded Dsp ◽  
Company Limited ◽  
Slip Ring ◽  
Close Loop Control

A industrial strip shaper is developed, which mainly consisted of the shape detecting roller, the collecting ring, the DSP shape signal processing board and the shape control model. The structural form which is different from the international popular segmented detection roller is put forward and the entire detection roller inlayed block is developed to avoid the scratch of the strip surface due to different thermal expansion of the traditional detection roller measuring unit effectively. The signal transmission form which is different form the international popular dry slip ring is put forward, the spray wet slip ring is developed to improve the measuring precision and the service life. The signal processing form which is different form the international popular gathering card is put forward and the embedded DSP shape signal processing hardware system is developed to improve the measuring precision and the anti-interference ability. The shape signal processing software system whose function contains error compensation, pattern recognition, establishment of the target shape and the close loop control calculation is built to implement the intelligentized shape meter. The shape meter has been test chronically on the 1250 mm cold strip mill of Angang Steel Company Limited and the test result indicates that the measuring signals were stable and reliable and the close loop control of shape was implemented.

Shape Detecting and Shape Control of Cold Rolling Strip

2011 ◽  
Vol 311-313 ◽  
pp. 902-905 ◽  
Author(s):  
Li Po Yang ◽  
Bing Qiang Yu
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Shape Control ◽  
Digital Signal ◽  
Cold Rolling Mill ◽  
Shape Deviation ◽  
Cold Rolling Strip ◽  
Rolling Strip ◽  
Loop Shape ◽  
Shape Detecting

Based on the shape detecting principle and the DSP (Digital Signal Processing) technology, a high-precision shape detecting system of cold rolling strip is developed to meet industrial application. It was successfully used in Angang 1250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting was 0.2 I, the shape deviation was controlled within 6 I after the close loop shape control was input.

Research on Shape Detecting System of Cold Rolling Strip

2011 ◽  
Vol 697-698 ◽  
pp. 525-528
Author(s):  
Li Po Yang ◽  
Bing Qiang Yu
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Shape Control ◽  
Shape Index ◽  
Cold Rolling Mill ◽  
Cold Rolling Strip ◽  
Rolling Strip ◽  
Quality Stability ◽  
Loop Shape ◽  
Shape Detecting

Comprehensive considered actual working conditions of cold rolling mill, a high precision shape detecting system of cold rolling strip was developed to meet industrial application. Consideration to both follow-up processing technology requirements, dynamic flatness standard curves could be formulated according to different rolling conditions and product specifications, and reliable shape datum were provided for close-loop shape control. This system was successfully used in Angang 1250 mm HC 6-high reversible cold rolling mill. Then the shape index and the quality stability of cold rolling strip were increased significantly, the errors between the calculated values and measured values of the total tension were less than 3%, the precision of shape detecting is 0.2 I and shape indices was within 6 I after the close-loop shape control was input.

Research on New Shape Meter of Cold Rolling Strip

2011 ◽  
Vol 697-698 ◽  
pp. 529-532
Author(s):  
Bing Qiang Yu ◽  
Li Po Yang
Keyword(s):  
Signal Processing ◽  
Signal Transmission ◽  
Strip Surface ◽  
Loop Control ◽  
Hardware System ◽  
Embedded Dsp ◽  
Company Limited ◽  
Slip Ring ◽  
Measuring Signal ◽  
Close Loop Control

A new strip shaper is developed to avoid the scratch of the strip surface due to different thermal expansion of the traditional detection roller measuring unit effectively. The signal transmission form which is different form the international popular dry slip ring is put forward; the spray wet slip ring is developed to improve the measuring precision and the service life. The signal processing form which is different form the international popular gathering card is put forward and the embedded DSP shape signal processing hardware system is developed to improve the measuring precision and the anti-interference ability. The shape signal processing software system whose function contains error compensation, pattern recognition, establishment of the target shape and the close-loop control calculation is built to implement the intelligentized shape meter. The shape meter has been test chronically on the 1250 mm cold strip mill of Angang Steel Company Limited and the test result indicates that the measuring signal is stable and reliable and the closed-loop control of shape is implemented.

Robust Control Techniques Applied to the Hot-Dip Galvanizing Process

2013 ◽  
Vol 459 ◽  
pp. 212-221 ◽  
Author(s):  
G. Romero ◽  
A. Palacios ◽  
J. Rivera ◽  
I. Pérez ◽  
D. Lara ◽  
...  
Keyword(s):  
Control System ◽  
Time Delay ◽  
Stability Property ◽  
Steel Strip ◽  
Property A ◽  
Hurwitz Matrix ◽  
Loop Control ◽  
Loop Control System ◽  
The Stability ◽  
Close Loop Control

This paper presents new results to compute the time-delay margin of the hot-dip galvanizing control system. Compared to previous works on this issue, this paper considers a mathematical model of the plant with two inputs and one output. The inputs are used to regulate the output, which represents the Zinc mass coating of steel strip. To achieve this objective, a multivariable PI controller is used, this controller is tuned applying the well known Ziegler and Nichols method, and then the maximum time-delay is computed in order to guarantee the stability property of the close loop control system. The work bases its results on a transformation of the time-delay operator and it is performed in order to get a two variable polynomial; after this, to obtain the robust stability property, a result based on the Hurwitz matrix is applied.

scholarly journals An Experimental Investigation of Steel Surface Topography Transfer by Cold Rolling

Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 916
Author(s):  
Dong Xu ◽  
Quan Yang ◽  
Xiaochen Wang ◽  
Hainan He ◽  
Youzhao Sun ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Surface Topography ◽  
Steel Strip ◽  
Reduction Rate ◽  
Rolling Process ◽  
Large Field ◽  
Initial Surface ◽  
Scale Invariant ◽  
Strip Surface ◽  
The Matrix

Automobile and household appliance panels require steel strips with extremely high-quality surfaces. Therefore, an in-depth study of the surface topography transfer of the steel strip during the rolling process is of considerable significance for improving product quality. In this study, the scale-invariant feature transform (SIFT) algorithm is used to realize the large-field stitching and the correspondence measurement of the surface topography of the roll and strip. The surface topography transfer mechanism and microconvex change law during cold rolling are revealed. Further analysis is conducted regarding the effects of different reduction rates and the initial surface topography of the roll on the formation of strip surface topography. Experimental results reveal that the furrow phenomenon occurs during the rolling process owing to the backward slip effect but is eliminated by the elastoplastic deformation of the matrix and the forward slip action. No furrow occurred along the width direction of the strip. With an increase in the rolling reduction rate, the transfer rate increases, and the strip surface topography is closer to the roll surface topography. Under the same rolling roughness condition and a small reduction rate (5%), the transfer degree increases remarkably with a rise in the reduction rate and increases slowly as the reduction rate continues to grow (from 7 to 10%). This study serves as a theoretical basis for the subsequent improvement of the surface quality of cold rolled strips.

Lubricating Performances of Nano Organic-Molybdenum as Additives in Water-Based Liquid during Cold Rolling

2011 ◽  
Vol 337 ◽  
pp. 550-555 ◽  
Author(s):  
Bing Wang ◽  
Jian Lin Sun ◽  
Yuan Yuan Wu
Keyword(s):  
Cold Rolling ◽  
Rolling Force ◽  
Steel Strip ◽  
Optical Microscope ◽  
Wear Scar Diameter ◽  
Strip Surface ◽  
Steel Strips ◽  
Water Based ◽  
Save Energy ◽  
Steel Balls

The non-parathion nano organic molybdenum (Nano-Mo) was adopted to substitute for the conventional extreme-pressure and anti-wear additives, uniformly dispersed in water-based cold rolling liquid for steel strips. The tribological properties of the water-based cold rolling liquid were tested by the four-ball machine, and the lubricity of the cold-rolling liquid for steel strip was evaluated on the 4-high cold rolling experiments. Besides, the worn surfaces of the steel balls were observed by an optical microscope. Results indicated that Nano-Mo as additive in water-based cold rolling liquid, compared with the conventional emulsions, PB values was increased by 4%, and friction coefficient and wear scar diameter were decreased by 10.8% and 13.1%, the lubricity of rolling liquid was verified by cold rolling test which showed that this liquid had the excellent lubricant performance to reduce the rolling force, save energy consumption and get thinner strip. Optical microscope was used to observe the strips surface which showed that strip surface streaks were clear, scratches were less and shallow. By roughness test and EDS analysis, defects were filled with nanoparticles, friction and wear were reduced effectively. In addition, tensile properties had been studied after rolling lubrication, but the results showed no significant effect.

scholarly journals Innovative Measurement Of Stress Superposed Steel Strip For Straightening Machines

2021 ◽  
Author(s):  
Fabian Bader ◽  
Lukas Bathelt ◽  
Eugen Djakow ◽  
Werner Homberg ◽  
Christian Henke ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Strain Hardening ◽  
Surface Defects ◽  
Steel Strip ◽  
High Strength ◽  
Loop Control ◽  
Innovative Strategy ◽  
Control Techniques ◽  
Curvature Measurement ◽  
Roll Type

Higher quality requirements by customers demand higher precision and accuracy from manufacturing processes. Application oriented preparation of semi-finished materials is key for subsequent forming operations, therefore, straightening machines are employed. Straightening strengthens the material by increasing plastic deformation by means of strain hardening, resulting in undesirable reduction in formability when processing high strength materials, in particular. Conventional roll-type straightening machines process either bars or strips. This is achieved upon passing material between rolls arranged in two staggered rows. However, conventional straightening processes do not adapt to the local varying distortion of coiled strips. Innovative, self-correcting process control techniques, which adapt to the initial geometric characteristics of the strip, present a promising approach to fix this issue through optimization of the leveling process. Here, an innovative strategy to improve straightening of high strength steel materials (1.4310) is presented. This implements optimized leveling, adding minimal plastic deformation and, thus, strain hardening. To operate an intelligent straightening machine, a reliable online measurement of the surface defects is fundamentally essential. The MagnaTest, which is developed for material testing, is made feasible for such purposes after calibrating for curvature measurement. Preliminary results are promising in regards to measuring the curvature online, so that the following straightening process can be close loop controlled. The bending measurement is linked to open/closed loop control, therefore providing an optimal straightening result in regards to formability, leveling, and reduced strain hardening.

New Industrial Shape Detecting Equipment of Cold Strip

2013 ◽  
Vol 313-314 ◽  
pp. 677-680
Author(s):  
Bing Qiang Yu ◽  
Li Po Yang
Keyword(s):  
Signal Processing ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Shape Control ◽  
Control Model ◽  
Cold Rolling Mill ◽  
Rolling Strip ◽  
Shape Detecting

Shape has a significant impact on the good quality of follow-up deep-processed steel products. But it is difficult to detect, so a shape detecting equipment of cold rolling strip is developed to meet industrial application, which mainly consist of the shape detecting roller, the collecting ring, the DSP shape signal processing board and the shape control model. The shape detecting system was successfully used in 1250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting is 0.2 I.

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