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    PROCESS AND DEVICE FOR THE MEASUREMENT AND REGULATION OF A LASER WELDING PROCESS
    1.
    发明申请
    PROCESS AND DEVICE FOR THE MEASUREMENT AND REGULATION OF A LASER WELDING PROCESS 审中-公开
    用于激光焊接过程的测量和调节的工艺和装置

    公开(公告)号：WO03022508A8

    公开(公告)日：2003-06-19

    申请号：PCT/NL0200571

    申请日：2002-08-30

    Applicant: NETHERLANDS INST FOR METALS RE ,  POSTMA SJOERD ,  MEIJER JOHANNES ,  AARTS RONALD GODFRIED KARIEN M

    Inventor： POSTMA SJOERD ,  MEIJER JOHANNES ,  AARTS RONALD GODFRIED KARIEN M

    IPC: B23K26/03

    CPC classification number: B23K26/032 ,  B23K2201/185

    Abstract: The present invention relates to a method and a device in which: - a workpiece is welded with the aid of a laser, - the light intensity above the weld pool is measured with the aid of an optical sensor, - the value measured by the optical sensor is compared with a defined reference value, and, - the energy supplied to the weld pool per unit length is adjusted as a function of the difference between the measured value and the determined reference value. According to the invention, the reference value is determined by allowing the energy supplied to the weld pool per unit length to increase from a relatively low starting level or to decrease from a relatively high starting level until a step change in the measured light intensity from a relatively high level to a relatively low level or vice versa is measured, after which the intensity measured by the optical sensor is used as a control signal for the quantity of energy which is to be supplied to the weld pool per unit length, the energy which is to be supplied to the weld pool per unit length being allowed to increase when the optical sensor measures a relatively high level of the light intensity and the energy to be supplied to the weld pool per unit length being allowed to decrease when the optical sensor measures a relatively low level of the light intensity.

    Abstract translation: 本发明涉及一种方法和装置，其中： - 借助于激光焊接工件， - 借助于光学传感器测量熔池上方的光强度， - 通过光学装置测量的值 传感器与定义的参考值进行比较，并且 - 根据测量值和确定的参考值之间的差值来调整供应给焊池每单位长度的能量。 根据本发明，通过允许提供给焊池每单位长度的能量从相对较低的起始水平增加或者从相对较高的起始水平降低直到从所测量的光强度的阶跃变化 测量相对较高的电平到相对较低的电平或相反的电平，然后测量由光学传感器测量的强度作为每单位长度要提供给熔池的能量的量的控制信号， 当光学传感器测量到相对较高的光强度时，每单位长度允许提供给焊池，并且当光学传感器测量时允许每单位长度提供给焊池的能量减少 相对较低的光强度。

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