Virtual rolling automation and setup calculations for six stands FEM finishing mill

Ilmola, Joonas; Seppälä, Oskari; Pohjonen, Aarne; Larkiola, Jari

doi:10.1088/1757-899x/1270/1/012060

Cited by 3 publications

(5 citation statements)

References 11 publications

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“…The ARCPRESS module calculates the mechanical state of the roll bite. ARCPRESS is published by authors in [15] and is mainly based on the work of Alexander [16] and Chen [17] to calculate contact pressure and frictional shear stress over the contact arc between the steel strip and work roll by the angular coordinate θ. Alexander's model is a fundamental numerical solution to Karman's differential equation [18] considering slipping and sticking friction regions over the contact arc. Chen derived the Karman equation by constituting the vertical and horizontal force equilibrium equation of the infinitesimal body [17].…”

Section: Arcpress Modulementioning

confidence: 99%

“…The plus sign is used for the backward slip zone and minus sign for the forward slip zone. Obtained differential equations are described in detail by the authors in [15].…”

Section: Arcpress Modulementioning

confidence: 99%

“…30, results in Eq. 31, which can be solved using trapezoidal integration rule and required boundary conditions for entry and exit contact pressures are delivered in [15,17].…”

Section: Arcpress Modulementioning

confidence: 99%

“…The flow stress 2k in the ARCPRESS model is defined in constitutive model and published by authors in [15]. The constitutive model is based on an experimental stress-strain compression test using the thermo-mechanical simulator Gleeble TM 3800.…”

Section: Constitutive Modelmentioning

confidence: 99%

See 3 more Smart Citations

Phenomenon-Based Model for Virtual Hot Strip Rolling

Ilmola,

Paananen,

Seppälä

et al. 2023

MSF

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Every year digitalization is taking a bigger role in the steel industry. Models for predicting metallurgical phenomena, roll forces and microstructure have been commonly used in development of novel steel grades. These individual models may predict certain phenomena thoroughly, but input values are usually based on an assumption or on a “good guess”. To produce reliable boundary conditions for these models of individual phenomena, a virtual rolling model is developed. This model computes the whole process of the hot strip mill from roughing to accelerated water cooling on a run-out table. Strip location and temperature evolution is calculated continuously. Thermal and thermo-mechanical (rolling stands) boundary conditions are according to process layout. Input data for the model is automatically read from raw process data. Rolling parameters are calculated using a coupled ARCPRESS model, which is developed by authors, and calculates normal and frictional shear stress distributions in the roll gap to predict roll forces and displacements of the work roll surface. Recrystallization is considered when calculating the flow stress of the rolled strip. Phase fractions during water cooling are calculated as well. The virtual rolling model minimizes the need for parameter speculation as all parameters are calculated throughout the process. All the input values are read from actual process data and the metallurgical and mechanical state of the strip are computed throughout the whole process. As required by the state-of-art virtual rolling model, this model is based on generally accepted theories and experimentally studied metallurgical and physical phenomena along with the thermo-mechanical response of the actual rolling process.

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Section: Arcpress Modulementioning

confidence: 99%

“…The plus sign is used for the backward slip zone and minus sign for the forward slip zone. Obtained differential equations are described in detail by the authors in [15].…”

Section: Arcpress Modulementioning

confidence: 99%

“…30, results in Eq. 31, which can be solved using trapezoidal integration rule and required boundary conditions for entry and exit contact pressures are delivered in [15,17].…”

Section: Arcpress Modulementioning

confidence: 99%

Section: Constitutive Modelmentioning

confidence: 99%

See 2 more Smart Citations

Phenomenon-Based Model for Virtual Hot Strip Rolling

Ilmola,

Paananen,

Seppälä

et al. 2023

MSF

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show abstract

“…The model contains virtual setup calculations, rolling automation and phenomena-based models for the most crucial thermo-mechanical phenomena. By implementing setup calculations and rolling automation [17] into FEM-model of the finishing mill, the actual response of the process can be considered in the model. Virtual rolling automation contains looper control (strip tensioning), rolling speed adjustment, automatic roll gap control, cooling of work rolls as well as entry-and intercoolers of the strip.…”

Section: Developed Modelsmentioning

confidence: 99%

Numerical Modelling of Thermo-Mechanical Processes in Steels - An Overview and Recent Progress

Pohjonen

Ilmola

Seppälä

et al. 2023

MSF

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Numerical modelling tools provide valuable means to quantitatively control thermomechanical processing. Several modelling tools have been applied and developed at University of Oulu during previous years, such as finite element models for hot rolling, recrystallization models, heat transfer and conduction model, coupled with phase transformation, as well as cellular automata and phase field models for simulating phase transformation during cooling. This article describes the overall development and recent progress of the developed numerical modeling tools.

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Effect of Work Roll Surface Warming on Hot Strip Temperature Development in Industrial Scale Virtual Rolling Model

Ilmola,

Paananen,

Larkiola

2024

Lecture Notes in Mechanical Engineering

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Digitalization is taking place in the steel industry and novel virtual rolling models will be implemented into industrial systems. Virtual rolling models are mainly assembled of individual models for modeling the rolling process considering mechanical, thermal and metallurgical phenomena. Advanced virtual rolling models even predict mechanical properties based on modeled metallurgical state. These models for certain phenomena do not usually consider the constantly changing process parameters which affect the temperature of rolled strip in the industrial process. In the hot rolling industry, temperature development is of particular importance. To calculate temperature development accurately throughout the rolling process, multiple thermal boundary conditions must be considered. In this investigation, we used the FE-model to study how parameters of rolling pass, work roll coolers and full length transfer strip affect warming of a work roll surface. These results were utilized in prediction of work roll surface temperature in contact between the work roll and the strip over full length strip rolling in virtual rolling model to model development of strip temperature in full scale industrial hot strip rolling process.

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Virtual rolling automation and setup calculations for six stands FEM finishing mill

Cited by 3 publications

References 11 publications

Phenomenon-Based Model for Virtual Hot Strip Rolling

Phenomenon-Based Model for Virtual Hot Strip Rolling

Numerical Modelling of Thermo-Mechanical Processes in Steels - An Overview and Recent Progress

Effect of Work Roll Surface Warming on Hot Strip Temperature Development in Industrial Scale Virtual Rolling Model

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