Mainly introduced the manufacture technology of the drum shape extruding core which determined the inner hole size of tube section material in the aluminum alloy extruding-drawing die.

• 主要介绍了在铝合金挤压拉伸模具中,决定管型材内孔尺寸用的鼓形挤压拉伸芯头的加工方法、加工要点和加工过程。