| 摘要 |
PURPOSE:To decide the quality of a welded zone in line by making a probe for detecting a flaw to travel following electrodes just after the proceeding direction of electrodes of the seam welding. CONSTITUTION:The probe 7 for detecting the flaw is made to travel following the electrodes 3 and 4 just after the proceeding direction of the electrodes 3 and 4 by fitting the probe 7 for detecting the flaw to a carriage 8 to which the electrode 3 is fitted, etc. Materials 1 and 2 to be welded are welded between the electrodes 3 and 4 and water is sprayed from a water nozzle 15 to form a water screen between the material 1 to be welded and the probe 7 as an acoustic coupling material and the prove 7 is made to travel sliding on the water screen. Ultrasonic waves are emitted from the probe 7 and the reflected waves are received by the probe 7. By this method, the quality of the welded zone can be determined in line and the inspection time is reduced. |
