十字轴因形状所致,其挤压成形无法采用传统的上模插入下模的闭式锻模结构.给出了括弧楔锁模十字轴无飞边径向挤压新型模具结构.该模具采用上凹模与浮动的下凹模对合结构,锻件在2个凹模和凸模形成的封闭模腔中挤压成形,生产的锻件无飞边,锻件精度和机械性能显著提高.结果表明,可降低生产成本,提高产品质量和生产效率.%The conventional closed forging die structure that a upper die is inserted into a lower die is not applicable for extrusion of cross shafts because of their shape.A new structure of radial extrusion dies with bracket wedges of locking die for cross shafts without flash was presented in this paper.The structure that a upper die closes with a float lower die was adopted in this die.The forgings without flash formed in the closed cavity formed by punch and two dies.The accuracy and mechanical performance of forgings were evidently improved.And the results indicate that production cost is reduced, product quality and production efficiency are enhanced.
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