| 摘要 |
PURPOSE:To make stable operation with a small balancing device by balancing the inertial force of a rolling mill which converts rotating motion to reciprocating motion by the air pressure of an air cylinder so that the change of the inertial force relative to a rotating angle and rotating speed is made to coincide with the change of a compressed air pressure. CONSTITUTION:The rotation of a crank arm 3 by a motor 1 is transmitted by a connecting rod 5 to a stand 8 of a Pilger mill 7 so that the stand moves back and forth. The inertial force of this case is balanced by the air pressures in front and rear chambers 14, 15 of a piston A of the air cylinder 10 sealed to an adequate pressure by an air circuit 26. The rotating angle and rotating speed signal of a tachogenerator and rotating angle detector 28 are calculated 13 and the signal J1 thereof is fed to a servocontrol valve 20 which in turn operates a hydraulic cylinder 10 to change the pressures of sub-cylinders 16, 17, thereby making the change thereof to coincide with the change of the inertial force. A correction signal J2 calculated by an arithmetic part 29 for the pressure to balance the inertial force is also fed to correct the balance error. The error by the sliding friction, etc., of the stand 8 is further corrected by a tension detection 34 signal J4. The stable operation of the rolling mill is executed with the smallest balancing device by the above-mentioned technique. |
