On the problem of open compression die emerged in production, the part is analyzed and a new processing method is put forward. Cold punching technology is replaced by cold extrusion technology.
This article introduced some methods of spline cold forming technology: forwarddieextrusion die forming, mud-rolls die extrusion forming, cold rolling forming and plate type cold rolling forming.
It put forward to the condition accepted for simplified design of extrusiondie considering the influencing effects of "clamshell phenomenon" on the flow uniformity of die.