Direct diode laser processing apparatus and sheet metal processing method using the same
AssigneeAmada Holdings Co., Ltd.
InventorKaori Usuda
Life of this patent
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Abstract
A direct diode laser processing apparatus includes a laser oscillator that emits a multiple-wavelength laser beam, a transmission fiber that transmits the multiple-wavelength laser beam emitted from the laser oscillator, and a laser processing machine that condenses the multiple-wavelength laser beam transmitted through the transmission fiber and processes a workpiece. According to chromatic aberrations of the multiple-wavelength laser beam and the wavelength dependence of emissivity of the workpiece, a light intensity distribution of the multiple-wavelength laser beam in a thickness direction of the workpiece is provided with a plurality of peaks.
Claims15
A direct diode laser processing apparatus comprising:
- a laser oscillator emitting a multiple-wavelength laser beam that has been spectral-beam-combined;
- a transmission fiber transmitting the multiple-wavelength laser beam emitted from the laser oscillator;
- and
- a laser processing machine condensing the multiple-wavelength laser beam transmitted through the transmission fiber and processing a workpiece, wherein
- a light intensity distribution of the multiple-wavelength laser beam in a thickness direction of the workpiece is provided with a plurality of peaks due to chromatic aberrations of the multiple-wavelength laser beam and the wavelength dependence of emissivity of the workpiece.
A method of processing a workpiece with the use of a direct diode laser processing apparatus that includes a laser oscillator that emits a multiple-wavelength laser beam that has been spectral-beam-combined, a transmission fiber that transmits the multiple-wavelength laser beam emitted from the laser oscillator, and a laser processing machine that condenses the multiple-wavelength laser beam transmitted through the transmission fiber and processes the workpiece, the workpiece being sheet metal having a thickness of 15 mm or more, the method comprising:
- to prevent dross production, concentrating a shorter-wavelength beam contained in the multiple-wavelength laser beam onto the surface of the sheet metal and a longer-wavelength beam contained in the multiple-wavelength laser beam onto the inside of the sheet metal.
A method of processing sheet metal with the use of a direct diode laser processing apparatus that includes a laser oscillator that emits a multiple-wavelength laser beam which has been spectral-beam-combined, a transmission fiber that transmits the multiple-wavelength laser beam emitted from the laser oscillator, and a laser processing machine that condenses the multiple-wavelength laser beam transmitted through the transmission fiber and processes a workpiece, wherein:
- controlling relative outputs of the multiple-wavelength laser beam so that a light intensity distribution of the multiple-wavelength laser beam in a thickness direction of the workpiece is provided with a plurality of peaks due to chromatic aberrations of the multiple-wavelength laser beam and the wavelength dependence of emissivity of the workpiece.
Dependencies are inferred from the claim text.