汽车中间轴锻造工艺的优化
The Optimization of Forging Process for the Automotive Middle Shaft
黄亮，周杰，杨海，卢先正
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作者单位：重庆大学材料科学与工程学院
中文关键字：中间轴；工艺改进；数值模拟；填充性能
英文关键字： automotive middle shaft; process improvement; numerical simulation; filling properties
中文摘要：传统的汽车中间轴锻造工艺为：自由锻制坯—成形镦粗—预锻—终锻—切边，该工艺对工人操作要求较高，生产效率低。改进的工艺为：成形镦粗—两道次滚挤—终锻—切边。该工艺能降低模具成本和工人的操作难度，提高生产效率。运用数值模拟仿真软件对改进的工艺进行全工序模拟，系统地研究了滚挤模具下压间隙量和坯料规格对锻件填充性能的影响，模拟发现：下压间隙量为6mm时锻件的填充性能最好，飞边少且均匀。最优的坯料规格为Φ64×258mm。实际生产表明：改进的工艺避免了因人工操作产生的不合格件，提高了锻件质量的稳定性。
英文摘要：The traditional forging process of automotive middle shaft is: Free Forging - forming upsetting - pre-forging - finish forging - Trimming, the operation of this process is difficult for workers, and low efficiency. Improved process: forming upsetting - twice squeeze roll - finish forging - Trimming. The process can reduce the die cost and difficulty of the operation, while improving production efficiency. By using numerical simulation software, the whole process of the improved process were simulated, the filling properties influenced by the squeeze roll die stroke and blank size were systematically studied, the results show that: when the pressing clearance distance is 6mm, the filling properties best, the flash is well distributed and less. The optimal blank size is Φ64×258mm. The actual production indicate that: the improved process avoid forgings blow the standard and increase the stability of forging quality.