为了降低直齿圆柱齿轮精锻成形载荷并防止终锻载荷急剧上升,在分析了圆柱体镦粗接触面上的压力分布规律的基础上,提出了芯轴交换技术,使坯料在镦挤时始终有自由流动的空间,并设计了实验模具和实验方案,通过Deform-3D对芯轴交换的模拟和实验研究,证明了芯轴交换技术在直齿圆柱齿轮精锻成形中对降低成形载荷的有效性。 In order to reduce the precision forging forming of spur gear and prevent the sudden increase of final forging load, the mandrel exchange technology was proposed based on the analysis of the pressure distribution on the upsetting contact surface of the cylinder, There is free-flowing space, and experimental molds and experimental schemes are designed. Through the simulation and experimental study of the mandrel exchange by Deform-3D, it is proved that the mandrel exchange technology is effective in reducing the forming load in the precision forging of spur gears Sex.