Optimum mate relationship between extruding pressure,expanding pressure and equilibrium pressure is a key problem in the superhigh pressure extruding\|expanding technology of multiway pipe.

• 挤压力、胀形力和平衡力三者之间的最佳匹配关系是多通管超高压挤压胀形工艺中的关键问题,提出并采用“应变样条”法建立了这3个成形力间的数学表达式。