Method for thermally working a workpiece, thermal working...

Details Method for thermally working a workpiece, thermal working... Method for thermally working a workpiece, thermal working...

2005-06-07

2005-06-07

Walberg, Teresa J. (Department: 3742)

Electric heating

Metal heating

By arc

C219S121560

Reexamination Certificate

active

06903300

ABSTRACT:
A thermal working tool (1) is movable along a workpiece surface (7) and includes a torch head (2) which has exchangeably mounted thereon cutting or welding tools (3; 4; 5) extending between the torch head (2) and the workpiece surface (7). A distance control for setting a predetermined working distance (A) between the working tool (1) and the workpiece surface (7) is carried out by a magnetic system, an alternating magnetic field being produced in a sensor body with ferromagnetic properties above the workpiece surface (7). The torch head (2) and at least one of the cutting or welding tools (3; 4; 5) contain ferromagnetic material and form at least part of the sensor body (2; 3; 4; 5). The magnetic field produced is sensed by two measuring coils, and is used for controlling the working distance (A).

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