Laser cutting machine

Details Laser cutting machine Laser cutting machine

1994-01-07

1996-02-13

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

21912183, B23K 2600

Patent

active

054913187

ABSTRACT:
A laser cutting machine which invalidates an alarm generated by a distance sensor during piercing, or invalidates said alarm in a first movement after piercing until a movement is made over a predetermined distance, or invalidates said alarm in a block having no movement, or keeps invalidating said alarm from a piercing start until a movement is made over a predetermined distance after piercing, or invalidates said alarm from a point a predetermined distance before a cutting end point to the cutting end point, or keeps invalidating said alarm from a point a predetermined distance before the cutting end point until a movement is made over a predetermined distance after the arrival at the cutting end point, or invalidates said alarm over a predetermined travel distance in a specified moving command block from the NC program, whereby said laser cutting machine can prevent cutting from being stopped by an unnecessary alarm generated by the alarm signal of the sensor due to scattered or accumulated spatters, the influence of plasma, or inclination of a workpiece or contact with a piece of the workpiece which has blown away at the cutting end point, and cutting can be continued as required.

REFERENCES:
patent: 3826578 (1974-07-01), King et al.
patent: 5155328 (1992-10-01), Ikawa
patent: 5206473 (1993-04-01), Suzuki et al.
patent: 5293024 (1994-03-01), Sugahara et al.
H. Kall, u.a., "Licht als Werkzeug", In: :Interface, 1990, v. 4, p. 8.

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