Rolls-royce Corporation

Terence S Milward

Michael N Wybrow

A method of producing an angled hole in a workpiece includes the steps of: using a laser beam to produce an initial orifice in the workpiece ; translating the laser beam away from the initial orifice to a starting point at a periphery of the hole to be produced; and moving the laser beam such that it traces an elliptical path on the surface of the workpiece, thus defining the periphery of the hole , whilst maintaining the focus of the laser beam on the workpiece surface. The starting point is located in a region of the edge of the angled hole which meets the surface of the workpiece at an obtuse angle.

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Nottingham, United Kingdom

Terence S Milward