Tooth form of preform die is important for improving the filling of gear teeth using a lower forging loadin the two-stage cold precision forging process of spur gears.

• 在直齿圆柱齿轮两步成形冷精锻工艺中,预锻模具齿形设计对改善材料填充性能,降低成形载荷具有重要意义。