Obara Group Incorporated

Kawasaki Jukogyo Kabushiki Kaisha

Uacj Corporation

Obara Corporation

Arinobu Mori

Yoshio Sato

Kenji Hayafuji

Shinichi Kurihara

Tsuneaki Sudo

Hideki Okada

Masaki Kumagai

Friction stir spot-welding is performed to join together a stack of a plurality of metal foils and a metal sheet by using a double-acting type rotary tool including a hollow member and a pin member which are movable independently of each other in their axial directions, and a clamp member which is fitted on an outer circumferential surface of the hollow member and which is movable in its axial direction. While an outer annular part of a portion to be friction-stirred is pressed with the clamp member, the pin member is inserted into the above-described portion and the hollow member is retracted, whereby a metal mass is accommodated within a space formed between the above-described portion and the hollow member. Then, the hollow member is advanced to press the metal mass into a hole formed by retraction of the pin member, whereby the hole is filled with the metal mass.

Process for spot-joining stacked metal foils

An equalizing mechanism of a welding apparatus connects an apparatus body and a fixed bracket, and includes a fixed member on the fixed bracket, and a pressure shaft on an apparatus body close to a bottom face of the fixed member. A cutout is at a position facing the fixed member A movable member on the apparatus body accommodates the fixed member. A restrictive member located by side faces of the fixed member and the movable member restricts relative movement thereof to a direction parallel to the pressure shaft. A driven lever is supported by a front portion of the fixed member to abut on an inner front face of the movable member at one end and abut on the pressure shaft at an other end. A spring between a back portion of the fixed member and an inner back face of the movable member presses the two members to move away from each other.

Equalizing mechanism of welding apparatus

A drive unit of a pressure device, such as a welding gun, includes a piezoelectric type load cell adapted to be arranged in an easily attached and removed manner and to have relatively small capacity. The drive unit includes a through-hole, formed in a rotary shaftof a drive motor, which is a drive source, and a pressure shaft, configured to be able to move with a part thereof being in the through-hole. The rotary shaftis rotatably supported by the bearing, and the piezoelectric type load cellis sandwiched between a preload striker plate, through which the pressure shaftpasses, and a preload setting striker plate, through which the pressure shaftpasses with a preload exerted on the load cell

Drive unit of pressure device

Growing community of inventors

Ayase, Japan

Arinobu Mori