Laser beam machine for performing piercing and cutting via focus

Details Laser beam machine for performing piercing and cutting via focus Laser beam machine for performing piercing and cutting via focus

1996-02-16

1997-03-04

Paschall, Mark H.

Electric heating

Metal heating

By arc

2191217, 21912178, 21912175, 36447408, B23K 2602

Patent

active

056076061

ABSTRACT:
A laser beam machine which makes it possible to effect piercing in a shortest time period and cutting with high accuracy. A program-reading device reads a machining program. A first distance changeover-directing device directs that a workpiece-to-converging point distance between a surface of a workpiece and a converging point of a laser beam is set to one value suitable for piercing when it detects a piercing program in the machining program. Further, a second distance changeover-directing device directs that the workpiece-to-converging point distance is set to one value suitable for cutting when it detects a cutting program in the machining program. A distance control device operates to control the workpiece-to-converging point distance in accordance with directions from the first and second distance changeover-directing devices. That is, the workpiece-to-converging point distance is set to the optimum value for piercing when piercing is carried out, while it is set to the optimum value for cutting when cutting is carried out, thereby completing piercing in a short time period, and effecting cutting with high accuracy.

REFERENCES:
patent: 4503313 (1985-03-01), Tsutsumi
patent: 5049723 (1991-09-01), Macdonald
patent: 5065330 (1991-12-01), Karube et al.
patent: 5247948 (1993-09-01), Androeli et al.
patent: 5252805 (1993-10-01), Nakata et al.
patent: 5374803 (1994-12-01), Yamada
patent: 5434383 (1995-07-01), Nakata et al.
patent: 5491318 (1996-02-01), Sugawara et al.

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