TORCH TRAVERSING MECHANISM

摘要

The invention describes a method of machining a workpiece with a cutting tool arrangement involving relative rectilinear movement between workpiece and tool, a heat source being mounted for transverse movement in a series of arcuate passes across the workpiece to heat and soften the portion thereof immediately ahead of the cutting tool. In examples given, the heat source is one or two plasma torches and the arcuate passes are part of an oscillatory or of a rotational movement.