1 前言 我国油泵油嘴行业中,长型孔式喷油嘴针阀体喷孔及压力室的加工,绝大部分都采用金属切削加工的方法。在喷孔与压力室的贯通处免不了产生加工毛刺,而这些毛刺都因工艺过程、工件材料、加工工具以及切削要素的不同而不同。该毛刺的存在,除直接影响到喷油嘴偶件本身的可靠性外,还影响到喷油嘴偶件主要技术性能指标中的流量特性和 1 Introduction China’s oil nozzle industry, the long hole nozzle needle orifice and pressure chamber processing, the vast majority of metal cutting methods. In the spray hole and pressure chamber through inevitably produce processing burr, and these burrs are due to the process, the workpiece material, processing tools and cutting elements vary. The existence of the burr, in addition to a direct impact on the reliability of the nozzle itself, but also affect the nozzle of the main technical performance indicators and flow characteristics and