研究表明，合适的凸模锥角和压力对滑动轴承冲压成形具有很大的影响作用。
The study shows that appropriate punch Angle and pressure in the forming is important.
本文建立了平面流动较为一般化的动可容速度场，分析了平面挤压(拉拔)的力能参数，获得了最佳凹模锥角。
A general dynamically permissible velocity field for plane flow is set up in the paper. The force and energy parameters for extrusion (or drawing) are analyzed, and the optimum draw Angle is obtained.
用常规的幂强化公式计算药筒在引伸后的强度时，数值偏低较多，原因是该公式未考虑引伸凹模锥角对强化的影响。
But the strength of the cartridge case after ironing drawing cannot be accurately calculated by this formula, because the result of calculation is lower than that reached in practice.
应用推荐