Pulse laser irradiation apparatus for coated metal material

Details Pulse laser irradiation apparatus for coated metal material Pulse laser irradiation apparatus for coated metal material

1993-04-05

1994-09-13

Epps, Georgia Y.

Coherent light generators

Particular beam control device

Control of pulse characteristics

372 29, 372 30, 21912164, 2191217, H01S 310

Patent

active

053475283

ABSTRACT:
In order to obtain a weld bead having a good outer appearance with little splash of sputters or the like and a sufficient shearing force, there is provided a flash lamp control section for controlling flash lamps so as to generate two rectangular waves in a pulse wave form at every cycle of a pulse laser beam generated by a pulse YAG laser during the irradiation of the pulse laser beam on coated metal materials. The flash lamp control section is adapted to control a relationship between a peak power and a pulse width of a first rectangular wave and a peak power and a pulse width of a second rectangular wave in predetermined ranges. Under the control of the flash lamp control section, the pulse laser beam generated by the pulse YAG laser is irradiated to the coated metal materials thereby carry out the irradiating operation.

REFERENCES:
patent: 4916284 (1990-04-01), Petrick
patent: 4959838 (1990-09-01), Barnes
patent: 4972156 (1990-11-01), Gregor et al.
patent: 5073687 (1991-12-01), Inagawa et al.

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