Method and device for treating a duct opening, in particular in a fuel injector

摘要

A method for producing precision bores, especially for fuel injector jets has the blank with an initial bore subjected to an abrasive fluid to provide a rough bore. This is subsequently worked by a less abrasive fluid with lower viscosity. The initial abrasion process (1) is followed by a washing stage (2) and a measuring stage (3) to determine how much more material needs to be removed by a fine abrasion stage (4), which is followed by a second washing stage (5) and a measuring stage (6). The jets are processed in a sequence on a linear feed.