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Laser Assisted Non-Destructive Testing




               Task                                               Result


               Due to increasing demand from manufacturers for    Utilising infrared thermography equipment combined with
               advanced quality control and testing without incurring the   an LDM 1500-100 diode laser fitted with specialized
               significant costs of conventional testing, Ken Automation   optics from Laserline GmbH to produce a large and
               of Japan has developed a process for testing large scale   extremely homogenous energy distribution on the
               components in a highly cost effective manner. Conven-  inspected component, Ken Automation has now installed
               tional non-destructive testing (NDT) e.g. X-ray and   many systems worldwide for NDT.
               ultrasonic, are too costly and time consuming to imple-
               ment in mass production. The NDT must prove to be   The process can be applied to welding of all types
               completely reliable, and yet work at high speed and with   (especially automotive). Additionally, if the system is
               little or no pre and post handling procedures required for it   utilized to test laser welding it is also possible for the
               to be applicable to high volume manufacturing.     welding diode laser to be utilized for the inspection
                                                                  heating, helping to reduce inspection costs even further.
               Procedure


               Due to the extremely short rise time, and high power of
               the diode laser it is highly effective as a heat source for
               non-destructive testing of various materials. When this is
               combined with a variety of specalised optics and ho-
               mogenising components from Laserline, a large test area
               can be precisely and uniformly heated.

               To internally visualise the joint or material condition, the
               inspection object is irradiated with a homogenous laser
               beam, then through detection with an infrared camera the   Material: Various
               changes in radiant heat can be analysed.           Task: Internal weld inspection
                                                                  Laser: LDM 1500-100
                                                                  Optics: Various homogenous profiles to suit parts
                                                                  Parameters: 1 kW, short duration pulse
                                                                  Result: Reliable, cost effective NDT




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