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1 前言 喷油嘴是柴油机中一对精密偶件,它的喷雾性能直接影响到柴油机的动力性、经济性和排放指标等。在喷油嘴结构参数确定以后,它的喷雾性能与其密封锥面(以下简称座面)的精度密切相关,因此喷油嘴针阀体座面的形状位置精度要求较高。为了保证如图1所示的技术要求,目前实际生产中,针阀体座面磨加工后须100％检验。本文拟就针阀体座面对中孔科向跳动的测量进行探讨。
1 Introduction Fuel injection nozzle is a pair of diesel precision parts, its spray performance directly affects the dynamic performance of the diesel engine, economy and emission targets. After the nozzle structure parameters are determined, its spray performance is closely related to the precision of its sealing conical surface (hereinafter referred to as seat surface). Therefore, the position accuracy of the injector needle seat surface is required to be higher. In order to ensure that the technical requirements shown in Figure 1, the current actual production, needle valve seat surface grinding to be 100% inspection. In this paper, we discuss the measurement of the beating of the needle seat in the middle hole.