Heavy Plate Mill Research Articles

Weten door Meten aan digitaal gesimuleerde processen*)

SummaryKnowledge from measuring digital simulated processesControling industrial processes demands knowledge of influencing factors. Measurement of those factors is often costly or difficult, sometimes impossible.Constructing a model of such a process may be the answer. One checks the model against the factors that can be measured and uses the results of calculations for factors that cannot be measured.These models should preferably be based on theoretical knowledge of the process, if available. Otherwise statistical models, correlating measurements without explaining them, can be used. When subsystems of the process are sufficiently well known, but interaction and autocorrelation are important, simulation models have proved to be very useful, especially when programmed on digital computers.Some illustrations are given of a heavy plate mill. Slab heating furnaces, mills and shears are treated individually and as components of the whole process.

Measurement and Analysis of Rolling Loads in a Large Hot Plate Mill

Instruments for measuring rolling loads have been constructed for insertion between the screw and the top bearing chocks of a heavy plate mill. They have been accommodated in a limited space and designed to attempt the measurement of non-uniformly applied loads. The load indications during the rolling of a varied programme for plates of different size have been analysed and compared with three roll-load formulae. That due to Sims seems to give the best agreement, and the majority of the calculations for reductions over 10 per cent lie within ±25 per cent of the measurements, whereas the other formulae show discrepancies often exceeding 50 per cent. For reductions less than 10 per cent all three formulae show similar trends, giving values in general very much lower than those obtained with the instruments. Although the instruments have proved satisfactory for short trials, certain features will be modified in models which are now being designed with a view to more permanent installation.