外文翻译--矫正扁轧制品现代化设备的自动化英文版.pdf

Metallurgist, Vol. 48, Nos. 7–8, 2004 AUTOMATING THE CONTROL OF MODERN EQUIPMENT FOR STRAIGHTENING FLAT-ROLLED PRODUCTS Yu. N. Belobrov, V. G. Smirnov, UDC 621.982 A. I. Titarenko, V. A. Perekhodchenko, and I. L. Sinel’nikov The company Severstal’ completed the successful introduction of new in-line plate-straightening machines (PSMs) on its 2800 and 5000 mills in August 2003 [1, 2, 3]. The main design features of the machines are as follows: • each machine is equipped with hydraulic hold-down mechanisms (to improve the dynamics and accuracy of the machine adjustments and more reliably maintain a constant gap); • the machines have mechanisms to individually adjust each work roller with the aid of hydraulic cylinders (this broadens the range of straightening regimes that can be realized by providing a measure of control over the change in the curvature of the plate); • each work roller is provided with its own adjustable drive (to eliminate rigid kinematic constraints between the spindles); • the system of rollers of the PSM is enclosed in cassettes (to facilitate repairs and reduce roller replacement costs); • the PSM has a system that can be used to adjust the machine from a nine-roller straightening scheme to a five- roller scheme in which the distance between the rollers is doubled (this is done to widen the range of plate thick- nesses that the machine can accomodate). Thus, the new straightening machine is a sophisticated multi-function system of mechanisms that includes a wide range of hydraulically and electrically driven components controlled by digital and analog signals. The entire complex of PSM mechanisms can be divided into two functional groups: t