The formula of tubeexpanding force is deduced using the slab method.
采用主应力法推导圆管扩径时扩径力的解析式。
2
The principle of ultra - high pressure hydraulic tubeexpanding 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。
3
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%.