Kobe Steel, Ltd.

Toyota Jidosha Kabushiki Kaisha

Shimadzu Corporation

Chieko Imai

Yoshihaya Imamura

Takayoshi Sugisaki

Koki Yoshida

Takahide Hatahori

Taiki Yamakawa

Ryusuke Hioki

Takumi Nakahara

Yuki Fujita

Provided are a method and a device for producing a frame structure, in which influences of both a thermal distortion due to welding and a decrease in the accuracy of the frame member itself are eliminated and high geometrical accuracy is obtained. The method for producing a frame structure includes supporting both ends of a long frame member, temporarily fixing a connecting member to somewhere along a longitudinal direction of the frame member, and final-welding the connecting member to the frame member while keeping the frame member in an elastically deformed state by imposing a bending load on an intermediate portion along the longitudinal direction of the frame member.

Method and device for producing frame structure

A testing method for a joined body, in which a second pipe member having an outer diameter smaller than that of a first pipe member having at least one through hole is inserted into the first pipe member and the second pipe member is expanded to form a joining portion, the testing method includes: applying an elastic wave vibration to the joined body of the first pipe member and the second pipe member, for plural visual field regions at different positions in a circumferential direction of the joined body, acquiring a vibration distribution of the second pipe member measured through the through hole and a vibration distribution of the first pipe member in a visual field region including the joining portion of the first pipe member and the second pipe member, which are measured optically and in a batch, and determining quality of joining in the entire joining portion based on the acquired vibration distributions.

Joined body testing method, joined body testing device, and joined body

A method for joining an aluminum material includes, in the following order, arranging a first wrought aluminum alloy material along a first jig in an internal space defined between the first jig and a second jig that is arranged to face the first jig and has a pouring port, pouring molten aluminum toward the first wrought aluminum alloy material through the pouring port under pressure to cause the molten aluminum to collide with a surface of the first wrought aluminum alloy material, thereby digging down the first wrought aluminum alloy material at a collision position between the molten aluminum and the first wrought aluminum alloy material, and flowing the molten aluminum together with a fraction of the first wrought aluminum alloy material removed by digging within the internal space along a surface of the first wrought aluminum alloy material around the collision position.

Method for joining aluminum material

Formed in series along an axial-direction end portion of a large-diameter pipe member, in the following order from the pipe end, are: a large-diameter-pipe pipe-end expanding portion; a large-diameter-pipe reduced-diameter portion; a large-diameter-pipe bulging portion; and a tapered portion. Formed in series along an axial-direction end portion of a small-diameter-pipe member, in the following order from the pipe end, are: a small-diameter-pipe pipe-end expanding portion; a small-diameter-pipe enlarged-diameter portion; and a small-diameter-pipe bulging portion. The outer cylindrical surface of the small-diameter-pipe enlarged-diameter portion is in close contact with the inner circumferential surface of the large-diameter-pipe reduced-diameter portion; the inner cylindrical surface of the large-diameter-pipe bulging portion and the outer circumferential surface of the small-diameter-pipe pipe-end expanding portion are engaged; and the inner circumferential surface of the large-diameter-pipe pipe-end expanding portion and the outer cylindrical surface of the small-diameter-pipe bulging portion are engaged.

Stepped pipe member and stepped pipe member production method

Provided are a coil unit for electromagnetic forming capable of stably processing a plurality of portions in the longitudinal direction of a tubular member while preventing the contact between the tubular member and a conductor or the contact between the conductors even when the tubular member is long, and a method for producing a formed article using the coil unit. The coil unit for electromagnetic forming includes: a shaft core member made of a resin; a conductor having a wound portion, which is wound around the shaft core member, and a pair of conductor extension portions; an insulating support; and a resin coating layer formed on the outer peripheral surface of the wound portion. In the insulating support, a conductor holding portion for holding the conductor extension portions apart from each other is formed along the longitudinal direction.

Electromagnetic forming coil unit and formed-article producing method using same

A coil unit is inserted into a tube member, an electromagnetic-forming coil part is arranged at a tube member forming position, a coil-side terminal is connected to a power-supply-side terminal of an end part of a high-voltage power supply cable, the electromagnetic-forming coil part is energized by a power supply part to electromagnetically form the tube member, the coil-side terminal and the power-supply-side terminal are separated, and the coil unit is removed from the tube member. Thus, the tube member can be separated from the high-voltage power supply cable during transport.

Tube-member-forming method

An electromagnetic forming device for an aluminum tube member, the electromagnetic forming device including: a jig plate in which a support member that has a through hole has been fixed to a substrate; and a tube insertion mechanism that inserts a tube member into the through hole in the support member. The electromagnetic forming device also includes: a coil unit that has an electromagnetic-forming coil part; a coil movement mechanism that supports the coil unit; a current supply part that supplies current for electromagnetic forming to the electromagnetic-forming coil part; and a jig plate transport mechanism that transports the jig plate from a tube insertion stage STto a tube expansion stage ST

Electromagnetic forming device and electromagnetic forming method for aluminum tube member

A joining structure includes a first member, a second member of a material different from that of the first member, and a separation mechanism provided between the first member and the second member and that separates the first member and the second member from each other, wherein a resin is filled into the space between the edge of at least one member among the first member and the second member, and the other member.

Growing community of inventors

Fujisawa, Japan

Chieko Imai