泵体是车辆发动机中的关重零部件,形状复杂,原采用金属型铸造,性能无法满足使用要求。零件成形工艺改为精密锻造。采用有限元法着重研究了其精锻成形过程,再现了泵体在筋部顶端不易充满的缺陷。通过设计不同的预制坯,优化出了预制坯形状。经过试制,结果表明,泵体锻件所有的窄筋、凸耳均充填完满,大头部分外轮廓不再切削加工。泵体锻件的使用性能,尤其是疲劳性能有较大的提高,对节省原材料、缩短制造周期有很大的意义。 Pump body is a critical component of the vehicle engine, the shape is complex, the original use of metal casting, the performance can not meet the requirements. Parts forming process to precision forging. The finite element method was used to study its precision forging process and to reproduce the defect that the pump body is not easily filled at the top of the rib. By designing different preforms, the preform shape is optimized. After trial production, the results show that the pump forgings of all the narrow ribs, lugs are fully filled, the bulk of the outer contour is no longer cutting. Pump forgings performance, especially fatigue performance has greatly improved, to save raw materials, shorten the manufacturing cycle of great significance.