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汽车传动轴叉形件精密模锻工艺研究
英文标题:Investigation of precision die forging process for fork parts used in automotive propeller shaft
作者:冀东生 夏巨谌 朱怀沈 胡国安 
单位:华中科技大学 
关键词:叉形件 精密模锻 数值模拟 
分类号:TG376
出版年,卷(期):页码:2010,35(6):14-18
摘要:

针对汽车传动轴叉形件采用普通模锻工艺生产时,其飞边金属消耗常达锻件自重的30%以上而导致材料利用率大为降低的问题,结合具体叉形件的形状结构特点,采用传统塑性理论分析和热力耦合有限元数值模拟相结合的方法进行研究,得到采用镦粗、挤压与压扁制坯,然后小飞边终锻成形的精密模锻工艺技术方案,因杆部采用挤压制坯,且仅在叉形头部形成小而薄的飞边,可使飞边金属消耗由30%减少到15%以下,同时锻件的机加工余量减少到普通模锻的一半,因而,可有效提高材料利用率和锻件质量。

The weight of flash resulting from traditional die forging process is up to 30% of the forging. Thus material utilization is very low. Based on analyzing the structure features of fork part, the appropriate precision die forging process was made by means of traditional plasticity theory and thermodynamic couple numerical simulation in rigid\|viscoplastic finite element method. The concrete technical procesd includes three steps: upsetting or extrusion, flattening and forging with small flash. Owning to extrusion was used to design blank in the round bar of forging and the small sin flash is only formed at ends of fork, the flash metal consumption decline from 30% to 15%. Meanwhile, material utilization and forging quality were improved efficiently, because the machining allowance of forging was reduced to 50% in comparison with traditional die forging process.

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