Ultrasonic testing method of the shaft member, ultrasonic flaw detector and ultrasonic flaw detection system

摘要

PPROBLEM TO BE SOLVED: To provide a method and an apparatus for ultrasonic flaw detection of shaft members. PSOLUTION: Flaw-detection ultrasonic waves of vertical waves are made to be incident onto a face of a shaft member from a phased array probe mounted rotatably in the circumferential direction of the shaft member. The phased array probe is arranged eccentrically so as to tilt with respect to the face of the shaft member. The ultrasonic waves perform flaw detection in the circumferential direction of the shaft member, while a part of the shaft member at which a rotating member is press-fitted is being scanned in the axial direction of the shaft member by a sector scan method. This apparatus includes the phased array probe for transmitting flaw-detection ultrasonic waves of vertical waves; rotating disks for eccentrically fixing the phased array probe; a mechanism for holding the rotating disks at a shaft end of the shaft member for performing ultrasonic flaw detection rotation-freely; and a detector of the rotation angles of the rotating disks. PCOPYRIGHT: (C)2009,JPO&INPIT