The principle of ultra - high pressure hydraulic tube expanding technology for liquid bag type expander is addressed in this article anddeveloping process for this new equipment has been discussed.
本文论述了液袋式超高液压胀管技术的原理和液压胀管新设备的开发。
We normally use the punch or hydraulic machine to expand the steel tube, but since the impetus and velocity is difficult to control, the cracking rate of expanding the steel tube reaches to over 10%.
钢管扩管通常采用冲床或液压机来加工，但由于冲力和速度难以控制，扩管破裂率达10%以上。
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