Toyota Jidosha Kabushiki Kaisha

Taiho Kogyo Co., Ltd.

Other

Kazuaki Sato

Soji Kamiya

Tetsuya Nukami

Toru Desaki

Yukio Okouchi

Akira Kato

Akihisa Inoue

Tsuyoshi Masumoto

Yoshio Fuwa

Atsuo Tanaka

Takashi Tomikawa

Tetsuya Suganuma

Yukio Okochi

Yasuo Fujioka

Shinichiro Sakamoto

Yasunori Sakurabayashi

Hiroshi Teranishi

A bolt fastening method enabling the same effect as when reducing the coefficient of friction of a thread surface without changing the coefficient of friction of the thread surface so as to realize an increase in a bolt axial force generated when fastening the bolt and a bolt fastening device realizing the bolt fastening method are provided. The bolt fastening method of the present invention is a bolt fastening method for when using a bolt having a bolt head and a bolt shank provided with an external thread to fasten fastened members, characterized by intentionally biasing surface pressures of a thread surface and a bolt bearing surface generated when fastening the bolt by imparting a lateral load parallel to the bolt bearing surface to the bolt head and, in that state, imparting a rotational torque rotating the external thread to the bolt head so as to fasten the bolt.

Bolt fastening method and bolt fastening device

A method of producing a fine TiC particle-dispersing type Al&#x2014;Sn based aluminum alloy includes the steps of: preparing either Al mother-alloy or metallic raw materials of the Al alloy and a green compact, in which TiC is dispersed; melting the Al mother-alloy or the metallic raw materials of the Al alloy to form an Al alloy melt; bringing the Al alloy melt and the green compact, in which TiC is dispersed, into contact with one another, thereby dispersing the TiC in the Al-alloy melt; casting the Al alloy melt, in which TiC is dispersed, into an aluminum-alloy ingot, in which TiC is dispersed; and rolling the aluminum-alloy ingot.

Production method of aluminum alloy for sliding bearing

An aluminum alloy which is able to use not only expensive TiC particles, but also inexpensive dispersed reinforcing particles and which is further raised in high temperature strength without requiring an increase in dispersed reinforcing particles, comprised of Sn: 2 to 20 wt %, Cu: 0.1 to 3 wt %, Ca: 0.02 to 1.5 wt %, at least one element selected from the group comprised of Mg, Cr, Zr, Mn, V, Ni, and Fe: not more than 2 wt % in total, at least one type of reinforcing particle selected from the group comprised of TiC particles, ZrC particles, and Al O particles: 0.1 to 5 vol % in total, and the balance of Al and unavoidable impurities; a slide bearing comprised of that aluminum alloy; and a slide bearing comprised of a bearing body made of that aluminum alloy provided on its surface with a resin coating layer comprised of a heat-curing resin and a solid lubricant.

Aluminum alloy and slide bearing

Aluminum alloy, which consists of from 2 to 20% by weight of Sn, from 3% by weight or less of Cu, and from 0.3 to 5% by volume of TiC particles, the balance being Al and unavoidable impurities, exhibits improved fatigue resistance at a high temperature region, while maintaining compatibility at low temperature notwithstanding improved fatigue resistance.

Aluminum alloy for sliding bearing and its production method

A high strength aluminum alloy is expressed by a general formula, Al.sub.a X.sub.b Mm.sub.c, in which 'X' stands for at least one element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zr, 'Mm' stands for a misch metal, a content 'a' of aluminum falls in a range of from 95.2 to 97.5 atomic %, and a content 'b' of 'X' and a content 'c' of the 'Mm' fall in a hatched area enclosed by points 'A,' 'B,' 'C' and 'D' of accompanying FIG. 1 on atomic % basis, and whose metallic phase includes microcrystalline phases or mixed phases containing amorphous phases in a volume content of less than 50% and the balance of microcrystalline phases. As a result, the amorphous phases or the microcrystalline phases are dispersed uniformly in its base microcrystalline phases appropriately, and at the same time the thus generating base microcrystalline phases are reinforced by forming solid solutions including the 'Mm' and the transition metal element 'X' as well. Hence, the high strength aluminum alloy comes to have a low specific gravity and a high strength which have not been available from conventional Al amorphous alloys.

High strength aluminum alloy

Growing community of inventors

Toyota, Japan

Kazuaki Sato