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发动机气缸盖机城合件中的气门座圈锥面对气门导管中心的圆跳动及其表面粗糙度的质量优劣,将直接影响进排气门的气密性,以至于整机的性能。因此,对于它的加工是生产发动机的关键工序之一。我们采用铰挤锪复合刀具加工,获得了良好的效果。气缸盖机械合件中的导管与座圈的材料分别为FZ1265和镍铬钼合金铸铁,其硬度分别为H B60～110及HRC33～38。它们的结构尺寸见图1。针对气缸盖机械合件加工前的状况及其精度要求,首先进行了第一工艺方案的
The engine cylinder head machine city seat valve seat cones in the valve guide tube center circle beating and the quality of the surface roughness of the pros and cons will directly affect the airtightness into the exhaust valve so that the whole machine performance. Therefore, for its processing is one of the key processes for producing the engine. We use the hinge squeeze 锪 composite tooling, get good results. The mechanical parts of the cylinder head and the raceways are made of FZ1265 and nickel-chromium-molybdenum alloy cast iron with hardness of H B60-110 and HRC33-38, respectively. Their structural dimensions are shown in Figure 1. Aiming at the condition of the cylinder head mechanical parts before machining and its precision requirements, the first process scheme