Ngk Insulators, Inc.

Uacj Corporation

Sumitomo Light Metal Industries, Ltd.

Koji Tanaka

Masaki Kumagai

Satoru Yamada

Tadashi Minoda

A method of joining heat-treatable aluminum alloy members by friction stir welding, including the steps of: a T4-treatment-performing step of performing a T4 treatment on heat-treatable aluminum alloy members so as to impart T4 temper to the heat-treatable aluminum alloy members; a joining step of joining the heat-treatable aluminum alloy members with T4 temper by friction stir welding to provide a joined product; and a reversion-treatment-performing step of performing a reversion treatment, the reversion-treatment-performing step being carried out prior to or after the joining step.

Method of joining heat-treatable aluminum alloy members by friction stir welding

A method of joining aluminum alloy members, including the steps of: obtaining a joined body including: (a) contacting aluminum alloy members each made of a 6000 series aluminum alloy with T4 temper; and (b) performing a friction stir welding operation on a contact portion of the aluminum alloy members at which they are held in contact with each other, so as to form a stir zone at the contact portion; and performing, on the obtained joined body, an underaging treatment which is an artificial aging treatment and which is completed before hardness of the stir zone reaches maximum hardness, the underaging treatment being performed before GP zones are formed at the stir zone of the joined body.

Heat treating friction stir welded aluminum alloy members and joined product

A bottom strength-inspecting apparatus for bottom-closed hollow pipes is disclosed. This apparatus includes an air chuck 2 for holding an outer peripheral surface of the bottom-closed hollow pipe W, and a pressing elements coaxially provided with the air such an elastic pressing element 8 adapted to contact a bottom surface 9 of the bottom-closed hollow pipe W from an axially outer side of the hollow pipe and press the bottom surface by given forces.

Apparatus for inspecting mechanical strength of bottom portions of

A bottom strength-inspecting apparatus for bottom-closed hollow pipes is disclosed. This apparatus includes an air chuck 2 for holding an outer peripheral surface of the bottom-closed hollow pipe W, and a pressing elements coaxially provided with the air such as elastic pressing element 8 adapted to contact a bottom surface 9 of the bottom-closed hollow pipe W from an axially outer side of the hollow pipe and press the bottom surface by given forces.

Growing community of inventors

Nagoya, Japan

Koji Tanaka