| 摘要 |
PURPOSE:To detect accurately flaws of a thin steel plate by providing a holding member with a supporting tire and a flaw detecting tire and supporting a load with the supporting tire and making the thickness of the flaw detecting tire thin and transmitting an ultrasonic wave from the inside of this tire to receive it. CONSTITUTION:A supporting tire 2 and a flaw detecting tire 17 are supported by a frame body 1. The supporting tire 2 consists of thick synthetic rubber or the like and is supported with a shaft 4 by the frame body 1 and a disc 6. The flaw detecting tire 17 is supported by the first shaft 9 and the second shaft 10, and the thickness of this tire is made thin, and a part 17a in the breadthwise direction is made thinner. A spindle 12 is allowed to pierce the second shaft 10, and a probe 20 is attached to the spindle 12 to transmit and receive the ultrasonic wave to and from the thin part 17a. A thin steel plate P is carried under both tires, and the load of a flaw detector is almost supported by the supporting tire 2, and flaws are detected by the flaw detecting tire 17. Since the flaw detecting tire is made thin and the ultrasonic wave having a high frequency is projected on the steel plate, flaws of the thin steel plate are grasped accurately continuously.
|
