| 摘要 |
PURPOSE:To decrease unbalanced external force as far as possible and 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 springs and selectively controlling spring constants by rotating speeds. 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 stand is supported by the springs 10 having the spring constant corresponding to the max. rotating speed in this case to absorb the inertial force. The changed rotating speed of the arm 3 is detected by a tachogenerator and rotating angle detector 11 and the spring combination conforming to the calculated 12 correction spring constant is selected by a spring constant varying device 13 and is assembled to the springs 10. The above- mentioned device 13 is operated to select the spring set having spring constants K1-K4 as desired by selectively pushing cylinders 21, 22. The unbalanced external force is minimized by the above-mentioned technique and the inertia force of various reciprocating force is absorbed by the smallest balancing device, by which the stable operation of the rolling mill is executed. |
