In order to get the flat fracture without,thorn and loss of metal and keep tubes sheared from varying shape when cutting tube,the periphery shearing method with core bar is presented in this paper.

• 为了使切断管材时切口没有毛刺、断面平整、仍能保持原状而且没有金属损耗、没有噪音，提出了用带芯棒的圆周剪切法剪切管材。