Mathematical Modeling of Mechatronics System "Hydraulic Screwdown Mechanism - Electric Drive of Rolling Mill Stand"

Radionov, Andrey A.; Gasiyarov, Vadim R.; Baskov, S. N.; Karandaev, A. S.; Khramshin, Vadim R.

doi:10.1088/1757-899x/361/1/012020

Cited by 15 publications

(6 citation statements)

References 7 publications

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“…Mathematical models of the UMD and LMD mechatronic systems, developed considering their linkage through metal, have been described in [53][54][55]. Dynamic drive modes at the roll slippage have been studied in [56][57][58].…”

Section: Simulation and Experimental Studiesmentioning

confidence: 99%

Developing Digital Observer of Angular Gaps in Rolling Stand Mechatronic System

et al. 2022

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Algorithms for monitoring the rolling mill mechatronic system state should be developed on the basis of modern digital technologies. Developing digital shadows (observers) of system state parameters in the periodic measurement mode is promising. This study relevance is defined by frequent emergency breakdowns of rolling stand mechanical transmissions. Most breakdowns are caused by worn end clutches (heads) of countershafts (spindles) transmitting rotation from the motor to the rolls. This is caused by elastic oscillations due to closing angular gaps when the metal enters the stand. The spindle joint angular gap increases over time with the mill operation. Therefore, it is an important diagnostic parameter that allows for an estimation of the transmission serviceability. In this regard, the problem of monitoring the angular gaps in the rolling stand mechatronic systems is relevant. The paper considers developing an observer of angular gaps in the spindle joints of the ‘electric drive-stand’ mechatronic system of the plate Mill 5000 of Magnitogorsk Iron and Steel Works PJSC (MMK PJSC). The monitored signal (angular gap) is calculated with the mathematical processing of the motor’s physical parameters (speed and electromagnetic torque), measured at a given frequency. The gap is determined indirectly by integrating the speed during its closing. To achieve this, the speed is controlled according to the triangular tachogram at no load. The stand’s electromechanical system modes have been studied using mathematical simulation. The observer’s practical use expediency has been reasoned. The structure of the observer-based angular gap monitoring information system is given. The system has been full-scale tested on Mill 5000, which has confirmed the developed algorithm efficiency. The study’s contribution is a justified and implemented concept of a relatively simple technical solution that can be commercially implemented without extra costs. The angular gap calculation algorithm does not involve complex mathematical techniques and can be implemented in industrial rolling mill controllers. Monitoring is automated without human involvement, which eliminates the human factor. The solution has a specific practical focus and is recommended for implementation at operating rolling mills.

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Section: Simulation and Experimental Studiesmentioning

confidence: 99%

Developing Digital Observer of Angular Gaps in Rolling Stand Mechatronic System

et al. 2022

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“…They also need to be adjusted for how the strip connects different components. The authors' papers [38][39][40] detail parts of the model.…”

Section: Simulation Model Structurementioning

confidence: 99%

Advancement of Roll-Gap Control to Curb the Camber in Heavy-Plate Rolling Mills

et al. 2021

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The quality of steelwork products depends on the geometric precision of flat products. Heavy-plate rolling mills produce plates for large-diameter pipes and for use in shipbuilding, mechanical engineering, and construction. This is why the precision requirements are so stringent. Today’s Mills 5000 produce flat products of up to 5 m in width; the operation of these units shows ‘camber’ defects and axial shift of the roll at the stand exit point. This induces greater loss of metal due to edge trimming and involves a higher risk of accidents. These defects mainly occur due to the asymmetry in the roll gap, which is in turn caused by their misalignment in rolling. As a result, the feed varies in gauge, and the strip moves unevenly. The paper’s key contribution consists in theoretical and experimental substantiation and development of a set of control methods intended to address roll-gap asymmetry. The methods effectively compensate for the asymmetry resulting from the “inherited” wedge, which preexists before the strip enters the stand. They also compensate for the “ongoing” roll misalignment that is caused by the difference in force on the opposite side of the stand during rolling. This comprehensive approach to addressing camber and axial displacement of the feed has not been found in other sources. This paper presents a RAC controller connection diagram that ensures that the roll gap is even across the feed. The paper notes the shortcomings of the design configuration of the controller and shows how it could be improved. The authors have developed a predictive roll-gap asymmetry adjustment method that compensates for the deviations in gauge during the inter-passage pauses. They have also developed a method to control gap misalignment during rolling. The paper showcases the feasibility of a proportional-derivative RAC. The methods have been tested by mathematical modeling and experimentally. The paper further shows oscillograms sampled at Mill 5000 after implementing the developed solutions. Tests confirm far better precision of the screw-down mechanisms on the opposite sides of the stand. This reduces the variation in gauge across the feed and thus curbs the camber defect. As a result, the geometry of the flat improves, and less metal is lost in trimming. The paper further discusses how the RAC controller interacts with the automatic gauge control system. The conclusion is that these systems do not interfere with each other. The developed systems have proceeded to pilot testing.

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“…The diagnosis algorithm of the FC gripping accuracy was developed on the basis of analysis carried out of methods of quality control for FC gripping in the process of bulk material packaging. The present algorithm was represented as a functional model which was made in IDEF0 notation with the help of the Ramus Educational software environment [19][20][21][22][23][24][25][26][27][28]. The diagram of first-level decomposition is presented in Figure 5.…”

Section: Development Of the Algorithm For The Machine Vision Systemmentioning

confidence: 99%

The Quality Control of the Automatic Manipulating Process of a Flexible Container When Bulk Materials are Packaged

et al. 2019

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The quality control of a flexible container (FC) gripped and held by a gripping device during the entire cycle of packaging is an important task in the packaging process of bulk materials in a soft package. Noncontact optical methods of control have been developed and researched for the diagnostics of the automatic manipulating process of a flexible container when bulk materials are packaged in a soft package. Diagnostics of the FC gripping and opening accuracy was carried out herein with the help of machine vision. Processing of the image obtained when the neck of the FC was photographed was carried out by a neural network algorithm, which was made according to a scheme of a perceptron. An automated diagnostics system of the FC gripping and opening accuracy was developed in terms of the obtained algorithm. A control technique based on the algorithm of comparison with a reference was used to reveal the FC gripping and opening defects. This technique consists of preliminary processing of the image obtained from the camera and automatic search for deviations in FC gripping and opening. As a result, a report of defects in the process of FC gripping and opening was obtained.

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Mathematical Modeling of Mechatronics System "Hydraulic Screwdown Mechanism - Electric Drive of Rolling Mill Stand"

Cited by 15 publications

References 7 publications

Developing Digital Observer of Angular Gaps in Rolling Stand Mechatronic System

Developing Digital Observer of Angular Gaps in Rolling Stand Mechatronic System

Advancement of Roll-Gap Control to Curb the Camber in Heavy-Plate Rolling Mills

The Quality Control of the Automatic Manipulating Process of a Flexible Container When Bulk Materials are Packaged

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