The mechanical status of nutted rod in drawing pipe with short mandrel rod is analyzed, the analysis basis for the dimensions design of nutted rod offered.

文章分析了拉拔管材时拉杆受力，并对拉杆尺寸设计提了分析依据。

It is not only meet with precision of the outface of parts,but also can assure the precision of the inface of parts.And it is developped the traditional process mandrel spinning.

该工艺不仅能满足工件外表面精求,而且还能保证内表面精求,是对传统模旋压工艺完善。