Process of jet cutting arcuate openings
OwnerRobin Muscat-Tyler, Paul J. Kwiatkowskiinventors
Life of this patent
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Abstract
A process for the jet cutting of arcuate openings in a metal workpiece such as steel, by means of creating a jet along a predetermined axis, applying the jet to the workpiece, with the axis of the jet offset from the perpendicular, and rotating the jet around to describe the arc desired while maintaining the non perpendicular axis and terminating the cutting path just prior to completion of the opening.
Claims10
A process for the jet cutting of arcuate openings having a predetermined perimeter in a metal workpiece comprising the steps of;
- creating a high temperature plasma gas cutting jet at a jet nozzle and directing said jet along a predetermined axis, at a start point inside said perimeter;
- applying the cutting jet to the work piece, with the axis of the cutting jet offset from the perpendicular;
- moving said jet along a generally spiral cut path directed outwardly from the start point until it reaches said perimeter;
- moving the jet around to describe the cut path of the perimeter desired while maintaining the non perpendicular axis;
- terminating the plasma jet, at a preselected position when the jet is nearing completion of the cut path and prior to completion of the perimeter cut path;
- and,
- moving the jet nozzle on a path back in from the perimeter cutpath and directing it inwardly towards the start point.
A process for the jet cutting an arcuate opening of a shape having a predetermined perimeter in a metal workpiece comprising;
- creating a cutting jet along a vertical axis;
- directing said jet at a starting point generally centrally of said shape
- piercing a hole through said workpiece at said starting point;
- moving said jet along a generally expanding spiral cutting path to reach the perimeter of said shape;
- tilting said axis of said jet offset from the perpendicular to compensate for taper;
- continuing to move said jet along a jet path around said perimeter to describe the shape desired while maintaining said non perpendicular jet axis;
- and,
- changing said jet path at a point just short of completion of said perimeter, to move said jet on a generally inward curved path, and terminating said jet.
Dependencies are inferred from the claim text.