Fanuc Corporation

Ryoma Okazaki

Atsushi Mori

Minoru Ando

A laser processing head comprises nozzle-holding means () for holding a nozzle in which a nozzle hole () is formed; condensing optical system-holding means () for holding a condensing optical system (), the condensing optical system-holding means being slidably arranged in the nozzle-holding means while maintaining sealing, moving means () for slide-moving the nozzle-holding means and the condensing optical system-holding means relative to each other; gas-feeding means () for feeding a gas into a laser processing head chamber () formed between the condensing optical system of the condensing optical system-holding means and the nozzle hole of the nozzle-holding means; passages () formed in the nozzle-holding means to communicate the laser processing head chamber with the exterior of the nozzle-holding means; slide members () that slide in the passages while maintaining sealing; and coupling means () for coupling the slide members to the condensing optical system-holding means. Therefore, the condensing optical system-holding means or the nozzle-holding means can be moved with a small force without providing an annular gas sub-chamber.

Laser processing head

A laser apparatus () for performing the laser machining operation by condensing the laser light output from a laser oscillator () is disclosed. A laser output value calculation unit calculates a laser output value (L) based on a command value (L) issued to a laser oscillator (). A temperature change estimating unit () estimates the temperature change or the temperature (Te) of specified component element(s) () of the laser apparatus based on the elapsed time (t) and the laser output value calculated by the laser output value calculation unit. An adjusting unit () adjusts the conditions for controlling the laser or the conditions for laser machining based on the temperature change or the temperature of the specified component element estimated by the temperature change estimating unit. A stable laser machining operation is performed without a temperature sensor. The laser output value (L) may be measured by a laser power sensor ().

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Yamanashi, Japan

Ryoma Okazaki