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    Laser machining apparatus
    2.
    发明公开
    Laser machining apparatus 有权
    Vorrichtung zur Laserbearbeitung

    公开(公告)号：EP1375052A1

    公开(公告)日：2004-01-02

    申请号：EP03253700.3

    申请日：2003-06-11

    申请人： Fanuc Ltd

    发明人： Yamazaki, Etsuo ,  Mori, Atsushi ,  Sato, Motohiko, Fanuc Dai2virakaramatsu

    IPC分类号： B23K26/04 ,  B23K26/42 ,  G05B17/02 ,  H01S5/068

    CPC分类号： B23K26/702 ,  H01S3/1022 ,  H01S3/1305 ,  H01S5/06825 ,  H01S5/06835

    摘要： A laser machining apparatus capable of effecting a feedback control of a laser output from an early stage of operation and detecting an abnormality of the laser output quickly and precisely. A laser output command issued from a laser output commanding section (1) is subjected to a feedback control by a feedback control section (2) and inputted to a laser pumping power supply (3) for a laser oscillator (5). An output of a laser power sensor (6) is amplified by an amplifier (7) and compared with an output of a measurement simulating section (12) for estimating the measured value of the laser output. A difference of the measured value and a simulated value of the laser output is inputted to the feedback control section (2) and also to an output abnormality detecting section (10). A measurement input estimating section (11) calculates an average power which should be outputted in a normal condition of the laser machining based on data of the laser output command. A first order delay system can be adopted as the measurement simulating section (12). The laser output abnormality detecting section (10) determines whether or not the difference of the measured value and the simulated value is within an allowable range for the detection of an abnormality of the laser machining.

    摘要翻译： 一种激光加工设备，其能够从早期操作实现激光输出的反馈控制，并且快速且准确地检测激光输出的异常。 从激光输出指令部（1）发出的激光输出指令由反馈控制部（2）进行反馈控制，输入激光振荡器（5）的激光泵浦电源（3）。 激光功率传感器（6）的输出由放大器（7）放大，并与用于估计激光输出的测量值的测量模拟部分（12）的输出进行比较。 将测量值和激光输出的模拟值的差异输入到反馈控制部分（2）以及输出异常检测部分（10）。 测量输入估计部件（11）基于激光输出命令的数据来计算在激光加工的正常条件下应该输出的平均功率。 可以采用一阶延迟系统作为测量模拟部分（12）。 激光输出异常检测部（10）判定测定值和模拟值的差是否在检测激光加工异常的容许范围内。