Workpiece processing arrangement

Details Workpiece processing arrangement Workpiece processing arrangement

1990-10-18

1991-08-20

Albritton, C. L.

Electric heating

Metal heating

By arc

21912174, 21912183, B23K 2604

Patent

active

050417142

ABSTRACT:
The workpiece processing arrangement, especially for surface hardening, has a laser which radiates a substantially monochromatic beam of rays, a deviating mirror provided with a reflecting layer for the beam arranged in the path of the beam for deviating the beam toward the workpiece, a focussing device for focussing the beam and a radiation detector arranged to detect heat radiation from the workpiece heated by the beam and to supply a signal corresponding to an intensity of the heat radiation, this signal being processed for power regulation of the laser. So that heat radiation from inwardly located surfaces on the workpiece can be easily and accurately detected and used to regulate the laser power, the reflecting layer is provided in a multilayer-interference filter with a blocking region for the beam of rays of the laser and with a permeable region for the heat radiation from the workpiece, and the radiation detector is located in the path of the heat radiation passing through the interference filter.

REFERENCES:
patent: 3485996 (1969-12-01), Chiou et al.

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