Topy Kogyo Kabushiki Kaisha

Topy Kogyo Kabusikikaisya

Keitaro Enami

Kentaro Oba

Masaki Ohara

Kenji Yoshii

Takanori Igarashi

Yuji Iwakura

Shoji Ono

Hiroyasu Kato

Zulkaizam Asri Bin Kassim Mohd

Tatsuro Kakami

A spinning apparatus for decreasing by spinning a thickness of a portion of a tube material having a uniform thickness except at a first axial end portion is disclosed. The spinning apparatus includes a spindle-side chuck having a conical concavity and a mandrel. The mandrel has a mandrel-side chuck formed in a form of a conical convexity corresponding in configuration to the conical concavity of the spindle-side chuck and a cylindrical portion for supporting the tube material. The spinning apparatus further includes a spinning roll for decreasing the thickness of the tube material by pressing the spinning roll against the tube material when the tube material is supported by the cylindrical portion of the mandrel.

Spinning apparatus and spinning method

A multi-piece rim structure for a wheel includes a rim base, a bead seat ring(ring member) and a lock ring. The bead seat ringreceives a load in a radial direction and an axial direction from a bead portion of a tire. An annular ridgeof the lock ringcan be received in an annular lock ring grooveof the rim base. A receiving grooveis formed in an inner surface of the lock ring grooveof the rim base. A sacrificial anticorrosion materialis embedded in the receiving groove. The sacrificial anticorrosion materialincludes metal such as zinc and aluminum that has a greater ionization tendency than iron that is a base material of the rim baseand the lock ring. Corrosion of the rim baseand the lock ringcan be suppressed by ionization of the sacrificial anticorrosion material

Multi-piece rim structure for wheel

The present invention provides a magnesium-based composite material that can achieve excellent performance such as high tensile strength not only at ordinary temperature but also at high temperature. The magnesium-based composite material of the present invention is AlCa-containing magnesium-based composite material, wherein said composite material is obtained by a solid-phase reaction of an aluminum-containing magnesium alloy and an additive, said additive being calcium oxide, and said composite material contains AlCa formed in the solid-phase reaction. In the magnesium-based composite material, CaO, in combination with AlCa, can be dispersed.

[object Object]

Growing community of inventors

Tokyo, Japan

Keitaro Enami