喷孔流量是喷油嘴偶件的一个重要性能指标,它直接影响到柴油机的动力性和经济性,而对喷孔流量影响最大的是针阀体压力室内喷孔入口处的几何形状和表面粗糙度所产生的节流作用。我厂生产的J系列低惯量喷油嘴偶件虽然在生产过程中对喷孔流量进行了控制,但由于加工工艺的原因,喷孔流量偏差与行业标准相比仍有一定差距。为此,我们对这一问题进行了研究,为我厂今后加工工艺的改进做了前期试验工作。 我厂生产的J系列低惯量喷油嘴偶件,喷孔加工使用的是引进的三轴喷孔钻床,分为三个工 The orifice flow rate is an important performance index of the nozzle couple, which directly affects the dynamic and economic performance of the diesel engine. The most important influence on the orifice flow rate is the geometry and the surface at the entrance of the pressure chamber of the needle valve body Roughness caused by the throttling effect. Although the J series low-inertia nozzle even produced in our factory controlled the jet flow in the production process, there is still a certain gap between the jet flow deviation and the industry standard due to the processing technology. To this end, we conducted a study on this issue, for the future improvement of our processing plant made a preliminary test work. I plant J series of low inertia nozzle couple, spray hole processing is the introduction of three-axis nozzle hole drilling machine, divided into three workers