Akebono Brake Industry Co., Ltd.

Akebono Research and Developement Centre Ltd.

Nakata Manufacturing Co., Ltd.

Rheo-technology Ltd.

Manabu Kiuchi

Feizhou Wang

Tomoyasu Nakano

Masazumi Hirai

Akihiko Nanba

Yasuo Fujikawa

Masao Arai

Ryuji Yamaguchi

Masato Noda

Feizhou c/o Nakata Manufacturing Co Ltd Wang

Tomoyasu c/o Nakata Manufacturing Co Ltd Nakano

Roll forming a round tube to a square tube without applying excessive load to the raw tube scheduled portions to become corner portions and shoulder portions. This invention structures the curvature of the rotation axis direction of the forming roll surface in a way that in relation to other raw tube locations (straightening precedes for the raw tube locations adjacent to the corner portion scheduled locations of the square tube. It disposes stands of four-direction roll structure at the forming roll stand furthest upstream and furthest downstream sides and disposes stands of upper-lower and left-right two-direction roll structure between the upstream and downstream roll stands, and by adopting forming roll with a structure having a curvature for constricting the raw tube locations to become the shoulder portions adjacent to the corner portions of the square tube at a smaller curvature than that constricting the raw tube portions to become the side portion centers of the square tube cross section.

Square tube forming roll, square tube forming method, and forming device

A method of manufacturing an aluminum-base composite disc rotor comprising the steps of preparing a rough-shaped disc rotor made of a mixture of aluminum powder or aluminum alloy powder with reinforcing particles or aluminum alloy, placing a mixture of aluminum powder or aluminum alloy powder with reinforcing particles or a preform made thereof on each of fixed positions of the rough-shaped disc rotor, and heating the mixture or the preform to at least a region of mashy state temperature to mold under pressure. Thereby the heat resistance and the wear resistance of the aluminum-base composite disc rotor for light-duty cars and industrial machinery are improved.

Method of manufacturing an aluminum-base composite disc rotor

In a process and an apparatus for stably and continuously producing a solid-liquid metal mixture in which non-dendritic primary solid particles are dispersed into the remaining liquid matrix, molten metal is charged into a clearance between a wall member and a rotating agitator composed of a cylindrical drum having a horizontally rotational axis.

Process and apparatus for the production of semi-solidified metal

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Zushi, Japan

Manabu Kiuchi