Publication detail

Study of the work roll cooling in hot rolling process with regard on service life

ZAHRADNÍK, R. HRABOVSKÝ, J. RAUDENSKÝ, M.

Original Title

Study of the work roll cooling in hot rolling process with regard on service life

English Title

Study of the work roll cooling in hot rolling process with regard on service life

Type

conference paper

Language

en

Original Abstract

Operational conditions and many studies confirmed that the work rolls cooling in hot rolling process have significant impact on damage and service life. The specific approach based on the numerical simulation and experimental results of the work roll cooling optimization and service life improvement is presented in this paper. The 3D finite element model was prepared for the numerical simulations of the work roll cooling. The FE model represents circular sector of the work roll. The model is fully parametric. It is capable to simulate a roll with any diameter, any thickness. Each of the model parameters can be easily changed based on user requirements. The stress state is calculated by ANSYS in two steps. At first, the thermal conditions as starting temperature of the roll, cooling intensity and so on are applied and time dependent thermal analysis is performed. The temperature field of work roll is obtained from transient thermal analysis and is used as thermal loads in second step. In the second step structural analysis is carried out. The other relevant boundary conditions as normal, shear and contact pressure are considered in structural analysis. The Tselikov load distribution model is used for normal and shear stress distribution in a rolling gap. The boundary conditions for FE analysis are prepared in software MATLAB. All considered boundary conditions are based on real measured data from hot rolling mills. The results of the performed analyses are focused on the description of the assessing methodology of the work rolls cooling on the stresses, deformations and service life of the rolls.

English abstract

Operational conditions and many studies confirmed that the work rolls cooling in hot rolling process have significant impact on damage and service life. The specific approach based on the numerical simulation and experimental results of the work roll cooling optimization and service life improvement is presented in this paper. The 3D finite element model was prepared for the numerical simulations of the work roll cooling. The FE model represents circular sector of the work roll. The model is fully parametric. It is capable to simulate a roll with any diameter, any thickness. Each of the model parameters can be easily changed based on user requirements. The stress state is calculated by ANSYS in two steps. At first, the thermal conditions as starting temperature of the roll, cooling intensity and so on are applied and time dependent thermal analysis is performed. The temperature field of work roll is obtained from transient thermal analysis and is used as thermal loads in second step. In the second step structural analysis is carried out. The other relevant boundary conditions as normal, shear and contact pressure are considered in structural analysis. The Tselikov load distribution model is used for normal and shear stress distribution in a rolling gap. The boundary conditions for FE analysis are prepared in software MATLAB. All considered boundary conditions are based on real measured data from hot rolling mills. The results of the performed analyses are focused on the description of the assessing methodology of the work rolls cooling on the stresses, deformations and service life of the rolls.

Keywords

Hot rolling simulation, surface temperature, FEA, thermal stress, service life

RIV year

2013

Released

10.06.2013

Publisher

AIM Italy

Location

Venice

ISBN

9788885298958

Book

Rolling 2013

Edition

1

Edition number

1

Pages from

1

Pages to

12

Pages count

12

Documents

BibTex


@inproceedings{BUT101043,
  author="Radek {Zahradník} and Jozef {Hrabovský} and Miroslav {Raudenský}",
  title="Study of the work roll cooling in hot rolling process with regard on service life",
  annote="Operational conditions and many studies confirmed that the work rolls cooling in hot rolling process have significant impact on damage and service life. The specific approach based on the numerical simulation and experimental results of the work roll cooling optimization and service life improvement is presented in this paper.
The 3D finite element model was prepared for the numerical simulations of the work roll cooling. The FE model represents circular sector of the work roll. The model is fully parametric. It is capable to simulate a roll with any diameter, any thickness. Each of the model parameters can be easily changed based on user requirements. The stress state is calculated by ANSYS in two steps. At first, the thermal conditions as starting temperature of the roll, cooling intensity and so on are applied and time dependent thermal analysis is performed. The temperature field of work roll is obtained from transient thermal analysis and is used as thermal loads in second step. In the second step structural analysis is carried out. The other relevant boundary conditions as normal, shear and contact pressure are considered in structural analysis. The Tselikov load distribution model is used for normal and shear stress distribution in a rolling gap. The boundary conditions for FE analysis are prepared in software MATLAB. All considered boundary conditions are based on real measured data from hot rolling mills.
The results of the performed analyses are focused on the description of the assessing methodology of the work rolls cooling on the stresses, deformations and service life of the rolls.",
  address="AIM Italy",
  booktitle="Rolling 2013",
  chapter="101043",
  edition="1",
  howpublished="electronic, physical medium",
  institution="AIM Italy",
  year="2013",
  month="june",
  pages="1--12",
  publisher="AIM Italy",
  type="conference paper"
}