A temperature predicting model for manufacturing processes requiring coiling


Autoria(s): Troyani,Nando; Montano,Luis
Data(s)

01/12/1999

Resumo

A model for predicting temperature evolution for automatic controling systems in manufacturing processes requiring the coiling of bars in the transfer table is presented. Although the method is of a general nature, the presentation in this work refers to the manufacturing of steel plates in hot rolling mills. The predicting strategy is based on a mathematical model of the evolution of temperature in a coiling and uncoiling bar and is presented in the form of a parabolic partial differential equation for a shape changing domain. The mathematical model is solved numerically by a space discretization via geometrically adaptive finite elements which accomodate the change in shape of the domain, using a computationally novel treatment of the resulting thermal contact problem due to coiling. Time is discretized according to a Crank-Nicolson scheme. Since the actual physical process takes less time than the time required by the process controlling computer to solve the full mathematical model, a special predictive device was developed, in the form of a set of least squares polynomials, based on the off-line numerical solution of the mathematical model.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-73861999000400008

Idioma(s)

en

Publicador

The Brazilian Society of Mechanical Sciences

Fonte

Journal of the Brazilian Society of Mechanical Sciences v.21 n.4 1999

Palavras-Chave #Temperature Prediction #Thermal Contact #Finite Elements #Metal coiling
Tipo

journal article