Method of producing a multi-apertured workpiece

Details Method of producing a multi-apertured workpiece Method of producing a multi-apertured workpiece

B - Operations, Transporting

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B23H 1/02 (2006.01) B23H 9/14 (2006.01) B23P 13/00 (2006.01) F02M 61/16 (2006.01) F02M 65/00 (2006.01)

Patent

CA 1339280

A method for producing a multi-apertured workpiece such as a fuel injector comprising forming an aperture in a workpiece by EDM machining (10), supplying a calibrating fluid such as deionised water through the aperture from a reservoir (17) via a pump (18) measuring the flow and pressure through the aperture by transducers (19, 20) and comparing the results with a predetermined ideal, adjusting the EDM machine (10) in accordance with such comparison so as to compensate for the difference between the measured values and the predetermined ideal, forming a further aperture using the adjusted EDM machine (10) and repeating the preceding steps until the appropriate number of apertures has been formed. The apparatus may include CNC operation (14) and the comparison may be made by computer (15) linked to the CNC (14) for adjusting the EDM machine (10).

607799

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