| 摘要 |
PURPOSE:To judge the quality of welding on the basis of the presence or magnitute of the signal corresponding to the boundary region of each metal plate, by opposing an ultrasonic pulse generator and a transmitted pulse detector to both sides of the laminated metal plate corresponding to a welded part. CONSTITUTION:Vertical flaw detection probes 5a, 5b with delay materials are arranged so as to be opposed to both sides of laminated metal plates 2a-2c corresponding to the welded part of a work 1. The probe 5a connected to the transmission terminal 7a of a pulse transmitting-receiving signal 7 among the probes 5a, 5b functions as an ultrasonic pulse transmitter and the probe 5b connected to the receiving terminal 7b thereof functions as a transmitted pulse detector. The output signal of the probe 5b as the transmitted pulse detector is displayed on the 2hr axis on CRT8 of an analogue display apparatus through a pulse transmitter-receiver 7. That is, it is displayed whether the nugget formation of a spot welded part is sufficient on the basis of the presence or magnitude of the intermediate echo at the position corresponding to a boundary part. |
