Method for machining fluid device including two inclined intersect flow passages

The present invention discloses a method for machining a fluid device, where the fluid device includes a basic body (13) in which a first (13a) and a second (13c) flow passages intersect with each other inclinedly. The basic body (13) is provided with a first inner wall (13b) limiting the first flow passage (13a), a second inner wall (13d) limiting the second flow passage (13c) and a boundary region (13x) between the first and the second inner walls (13b, 13d). The boundary region (13x) includes a pointed section (130x) intersecting at an acute angle between the first and the second inner walls (13b,13d). The method is characterized in that the pointed section (130x) of a boundary region (13x) is machined by ECM using both a first (50) and a second (51) machining electrodes. The first and second machining electrodes (50, 51) are correspondingly inserted into the first and second flow passages (13a, 13c) so as to lie opposite the pointed section (130x) of the boundary region.