Kawasaki Jukogyo Kabushiki Kaisha

Hironori Okauchi

Hideyuki Hirasawa

Mamoru Nishio

Toshihiro Yamaoka

Kenji Tsubaki

Katsumi Nagata

Mitsuo Fujimoto

Yukichi Takaoka

Takumi Yoshida

Noriko Ohmichi

A determination assist system including a first image generating section for generating a first planar image based on data of a first test index; a second image generating section for generating a second planar image based on data of a second test index; a differentiation section which differentiates the first planar image and the second planar image to generate a first differential image and a second differential image, respectively; a binarization section which binarizes the first differential image to generate a first binary image including a first region which is not less than a first threshold and a second region which is less than the first threshold, and binarizes the second differential image to generate a second binary image including a third region which is not less than a second threshold and a fourth region which is less than the second threshold; and a determination image generating section.

Determination assist system of ultrasonic testing, determination assist method of ultrasonic testing, determination assist program of ultrasonic testing, and computer-readable storage medium for storing determination assist program of ultrasonic testing

A dissimilar material joint is formed by arranging a plurality of joint segments consecutively in a longitudinal direction. Each joint segment is formed by joining and integrating together a first member, an intermediate member, and a second member by explosive welding. A groove is formed in a joint end face of each joint segment, the joint end face being joined to another one of the segments, the groove spacing apart an end face of the first member and an end face of the second member from each other in a stacking direction. In the dissimilar material joint, the end faces of the respective first members of the joint segments that are adjacent to each other are joined together by welding, and the end faces of the respective second members of the joint segments that are adjacent to each other are joined together by welding.

Dissimilar material joint, structure in which dissimilar material joint is used, and method of producing the same

This invention provides a method for inspecting a joined region and joining strength of a joined object formed by a spot friction stir joining process. In this method, an ultrasonic wave is introduced into the joined object from a backing faceopposed to a joining tool plunging faceand the ultrasonic wave reflected from the joined objectis taken in. In this case, the joining regionand the joining strength is estimated by observing a reflected wave of the ultrasonic wave in the vicinity of a position, along a reference direction Z, corresponding to an interfaceof two joining members, without using the reflected wave of the ultrasonic wave reflected from the joining tool plunging face, thereby inspecting the joined object based on the estimation result. Thus, influence of a concave/convex shape of a joining markformed in the joining tool plunging facecan be avoided, and the use of the ultrasonic wave for estimating the joined regioncan achieve an inspection of joining quality without destroying the joined object

Method and apparatus for inspecting joined object formed by friction stir joining

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Nishinomiya, Japan

Hironori Okauchi