Smaller taper angle of collet, larger clamping power.

弹性套锥形角更小, 故夹紧力更大.

To make sure I got the taper angle right, I would check by putting the rotary rasp behind the tip so I could just see the edges of it.

确认我的尖鹿角是正确的，我将通过把转动锉刀放在顶端后来检查它的边缘。

At present, the ring rolling technology roll one ring in one process, and the technology can't deal with stress focus on the sharp taper angle of mandrel roller.

目前锥形套圈辗扩技术只能一次成形一件，而且由于锥形套圈锥角使得芯辊应力集中严重。