METHOD FOR PRODUCING A VALVE SEAT BODY FOR A FUEL INJECTION VALVE, AND CORRESPONDING FUEL INJECTION VALVE

摘要

Conventional valve seat bodies for fuel injection valves are precision-worked using different tools for working on the guiding sections for guiding an axially movable valve element, and the valve seat at separate times. The inventive method for producing a valve seat for a fuel injection valve comprises not only the known steps for producing a valve seat body (25), for creating a through opening (32) inside said valve seat body (25), for shaping out a valve seat area (26) in the form of a truncated cone-shaped section of the through opening (32) and for shaping out a guiding area (31), but also the simultaneous precision-working of all of the guiding sections (51) in the guiding area (31) and the valve seat area (26, 26') using a master sphere (130).