GB1009035A - Rolling mill - Google Patents

Abstract

1,009,035. Rolling. BOCHUMER VEREIN FUR GUSSSTAHLFABRIKATION A.G. June 22, 1962 [July 1, 1961], No. 24105/62. Heading B3M. [Also in Division G3] A continuous finishing rolling mill includes feedback control means for individually controlling the passes of several stands, and a regulator for at least one of the stands for gradually decreasing the roll pass at a rate which compensates for the increase in gauge of the rolled product as its temperature falls. A strip of initial gauge So and final gauge S passes stands I-VII and has its thickness measurements fed from gauges 9 and 10 to a mixer which rescales the information and feeds it to a computer 7 to control the passes of stands III to VI. The passes of stands I and VII are held constant at a value determined at the start of rolling. In addition, a regulator 11 is fed information resulting from prior experience with different lengths and sizes of strip, thus causing stand II to reduce its pass gradually to counterbalance the tendency of the strip to increase in gauge as its temperature progressively decreases. The regulator 11 may be associated with stands I and III, or II and IV. The control equipment 2 associated with the stands IV to VI comprises a device 5, such as a load cell, for measuring pressure, a controller 4, and adjusting means 6, such as a screwdown.