利用飞秒激光加工热效应小、高精细、对材料无选择性等特点，针对柴油发动机高压共轨系统中关键零件——喷油嘴偶件喷油孔的加工需求，设计了一种利用三光楔扫描的飞秒激光加工装置，并进行了喷油嘴倒锥孔加工工艺研究.采用微孔三座标测量机(测量准确度1.2 μm)对倒锥孔尺寸准确度进行检测，通过喷油嘴高压液体流量试验台(测量准确度±0.1%)对批量制孔后的油嘴进行了流量测试，结果表明: 所设计装置加工的油嘴性能可以满足欧V排放法规的应用要求，对提升汽车制造业水平及柴油车排放标准具有重要意义.

Femtosecond laser processing has litle-thermal effects, high precision, and is not particular about materials. Aiming at the machining requirement for nozzle′s spray holes, as a key part of the high pressure common rail injection system for diesel engine, a femtosecond laser processing apparatus with three-wedge scanning system was designed for technical research of taper holes′ machining. Then tests of the taper holes′ physical dimensions and the flow rate of the fuel jet nozzles were carried out with three coordinates measuring machine (measurement accuracy 1.2 μm) and high-pressure liquid flow test bench for the injector(measurement accuracy ±0.1%). The experimental results show that the designed apparatus can machine nozzles, and the performance is able to meet the application requirement of Euro V emission regulations. The technique has important significance for improving the level of automobile industry and domestic emission standard of diesel engined car.