JPS5530311A - Induction and guidance method for cast piece of continuous casting - Google Patents

Abstract

PURPOSE:To control the thickness of cast pieces and prevent deterioration of interior quality by fixing the reference roll for the final thickness of cast piece and, especially, making it to correspond to the drawing speed, and detecting the measured value of the roll reaction force to allow smooth connection to the roll interval of the reference rolls, and thereby changing the setting of roll interval. CONSTITUTION:The roll interval setting Gc of the roll segment is determined by calculation to obtain the final target thickness of the cast piece (step A). Then, theoretical roll reaction force when set to Gc is calculated (B) and the oil pressure constant Pc of the oil pressure cylinder 7 corresponding to the reaction force Rc is calculated (C). Next, prior to casting, the roll interval is adjusted to attain to the above-mentioned roll interval setting by pushing up the upper frame 5' after zero point calibration of the roll interval detector 9 (D). Casting is started (E) and the roll pressure during the casting is measured with the load cell 8. Then, measured roll reaction force Ra is compared with reaction force Rc and if the difference exceeds the predetermined control value, the roll interval is corrected (F) to increasing or decreasing direction by actuating the cylinder 7.