Two years' practice shows that the upgraded drumlocking device of a piercer can fully meet the requirements of a twice piercing process and is worth wide application.
经两年多的实际使用证明，改进的穿孔机转鼓器完全能满足二次穿孔工艺要求，具有一定的推广价值。
2
The upgraded drumlocking device has integral drumlocking blocks and a float screw rod, with the antivibration performance improved and the thread clearance eliminated.
改进的穿孔机转鼓器结构，采用整体压鼓块和浮动丝杆，消除了螺纹间隙，提高了抗振性能。
3
With the upgraded locking device the axial force of the screw rod is reduced by half when roiling, Which makes the drum locked more reliably.