Patent ID: 7444991
Filing Date: 2008-11-04
Classification: B23P,F02M,Y10T

Abstract:
1. A method of forming an orifice plate for a fuel injector, the orifice plate including a member having first and second generally parallel surfaces, the method comprising: forming a pilot hole penetrating the member, the pilot hole extending along a first axis generally perpendicular to the first and second generally parallel surfaces; deforming the pilot hole proximate the first surface, the deforming providing an asymmetrical chamfer with respect to the first axis and defining a first portion of an orifice, the first portion being proximate the first surface; and shaving the pilot hole so deformed, the shaving providing a cylinder extending along a second axis oblique with respect to the second surface and defining a second portion of the orifice, the second portion being proximate the second surface, wherein the method further comprises laminating the member between first and second layers with a sacrificial material.