对气门毛坯锻压机原模具定位机构进行考察分析,针对其结构和受力机构不合理等诸多问题,提出改进设计方案,通过试验得知,新的模具定位机构既能有效地改善气门盘部凹坑相对杆部的同轴度,又能降低其工艺成本.本文介绍的内容对盘部有凹坑的气门生产厂家具有广泛的适用价值,对盘部平端面的气门生产亦具借鉴作用. Based on the investigation and analysis of the original mold positioning mechanism of the valve forging roughing press, aiming at many problems such as its structure and unreasonable force mechanism, an improved design scheme is put forward. It is found through experiments that the new mold positioning mechanism can effectively improve the valve disc concave The concentricity of the pit relative to the shaft and the cost of the process can be reduced.The contents introduced in this paper have a wide range of application value to the valve manufacturer with the recess in the disk and can also serve as reference for the valve plate production on the flat face of the disk.