METHOD FOR CONTROLLING THE AUTOMATIC ROLLING OF PIPES IN A REELING MILL

摘要

PCT No. PCT/JP81/00150 Sec. 371 Date Mar. 15, 1983 Sec. 102(e) Date Mar. 15, 1983 PCT Filed Jun. 30, 1981 PCT Pub. No. WO82/00108 PCT Pub. Date Jan. 21, 1982.A control method for controlling the screwing down pressure provided in a reeling mill where the reels are controlled by a combination of signals continuously monitored by a computer. The signals include the temperature of the pipe entering the reeling mill, the voltage and current supplied to the reeling motor and the speed of the reeling motor. A calculation is then performed which gives the actual reduction of wall thickness based upon a predetermined relationship of the temperature of the pipe entering the reeling mill and the torque of the rolling motor. The torque is calculated based upon the speed, current and voltage of the rolling motor. The pressure supplied to the rolling reels is then altered based on this signal.