Kawasaki Jukogyo Kabushiki Kaisha

Mitsuhiro Kamioka

Takehiro Nishimura

Toshiyuki Hirashima

Yousuke Tsumura

Shirou Honma

Mamoru Nishio

Daisuke Watanabe

Hidehito Nishida

Syuhei Yoshikawa

Kenji Waki

An ultrasonic flaw detector for a composite material constituted by a plurality of materials which are different in physical properties from one another includes: a section specifier configured to specify first and second sections of an RF signal of a reflected wave of an ultrasonic wave with which the composite material is irradiated, a material reflected wave being possibly generated in the first section, an interface reflected wave being possibly generated in the second section; a material flaw determiner configured to determine whether or not a value of the RF signal exceeds a positive first threshold in the first section; and an interface flaw determiner configured to determine whether or not the value of the RF signal falls below a negative second threshold in the second section.

Ultrasonic flaw detector and ultrasonic flaw detecting method for composite material

A friction stir welding apparatus includes: a rotating shaft, on which a thread for friction stirring is formed; and a drive unit rotatably supporting the rotating shaft. A rotating shoulder configured to rotate together with the rotating shaft to generate frictional heat between the rotating shoulder and back surfaces of workpieces is fixed to a distal end of the rotating shaft. The rotating shoulder is pushed against the back surfaces of the workpieces by a pushing mechanism. A stationary shoulder penetrated by the rotating shaft and configured to hold the workpieces in a sandwiching manner together with the rotating shoulder is non-rotatably mounted to the drive unit or a member connected to the drive unit.

Friction stir welding apparatus with an L-shaped support

Growing community of inventors

Kobe, Japan

Mitsuhiro Kamioka