| 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 oil pressure of a hydraulic cylinder and making the change of inertial force relative to a rotating angle and rotating speed to coincide with the change of the oil pressure. CONSTITUTION:The rotational 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 absorbed in balanced by the oil pressure obtd. by regulating the oil pressures P1, P2 in the front and rear chambers of a piston A of the hydraulic cylinder 12 by a servocontrol valve 11. The operation of the servocontrol valve 11 in this stage is adequately executed by the signal obtd. by calculating the rotating angle and rotating speed signals of a tachogenerator and rotating angle detector 13. The oil pressure is adequately maintained by a pressure sensor 14. The error by the sliding friction, etc., of the stand 8 is corrected by a tension detection signal J2. Centrifugal force exerted to a shaft 2 is absorbed by a means unbalancer 17 to assure the safety of operation. The stable operation of the rolling mill is executed with the smallest balancing device by the above-mentioned technique. |
