Modern Technologies for Micro-drilling of the Fuel Injector Nozzle used in Motor Vehicles - A Review of the Literature

To cope with the pollution norms and an improvement of combustion internal engines, high-quality holes diameters smaller than 145 µm are needed for manufacture fuel injection nozzles. The current practice using drilling by electro-discharge machining nozzles is limited in terms size hole it can efficiently produce time required drilling. In addition, cost tool high. This paper presents investigation into a sequential laser micro-drilling technique A pilot drilled removed electrodischarge. It was found that this hybrid process eliminated problems reformed heat-affected areas usually associated process. new has allowed reduction total compared to standard drilling, as less material from machining. quality good direct valuable savings increased production capacity injector nozzle.