Fujikoki Corporation

Nsk Corporation

Mitsubishi Heavy Industries Limited

Panasonic Corporation

Mitsubishi Jukogyo Kabushiki Kaisha

Mitsubishi Gas Chemical Company, Inc.

Matsushita Graphic Communication Systems, Inc.

Other

Shin-etsu Chemical Co., Ltd.

Panasonic Communications Co., Ltd.

Mitsubishi Chemical Corporation

Kyoto University

Tokyo Gas Company Limited

Tohoku Electric Power Company, Inc.

Aida Engineering Co., Ltd.

Kazuto Kobayashi

Akira Miyajima

Masaki Iijima

Kazuhiko Watanabe

Hiroshi Koyama

Hiroyuki Osora

Takashi Mogi

Yoshio Seiki

Nobuyuki Hagiwara

Masamichi Yano

Kazuhiro Morita

Yuu Yasuda

Isao Shintou

Toshio Nakamura

Tetsuya Imai

Hideaki Nagai

Yuuki Mizushima

Kiyoshi Ootsuka

Shinichi Sato

Wataru Matsubara

Hiroshi Makihara

Shuichi Miyamoto

Chie Kuwada

Hisanobu Kanamaru

Eiji Fukuda

Keiichi Horino

Naohiko Ukawa

Toshinobu Yasutake

Yoshinori Hyakutake

Masatoshi Shibata

Akira Matsumura

Takehiko Moriya

Makoto Sudo

Yoshihisa Saito

Akira Oguchi

Yuuji Takemoto

Yoshiyuki Takeuchi

Kazuyoshi Koreeda

Tomohiro Kudou

Hiroshi Ohira

Yoshimasa Fujimoto

Masahumi Moriwaki

Kiyoshi Ootuka

Yukio Tanaka

Shinji Matsumoto

Susumu Okino

Akira Hashimoto

Kiyoshi Toyoda

Shintaro Honjo

Yoshinori Kobayashi

Koji Hashimoto

Kozo Iida

Naoyuki Kamiyama

Atsuhiro Yukumoto

Kazuhisa Hayakawa

Masaki Kawano

Shigeru Nojima

Yoshihiro Noguchi

Noritaka Matsumoto

Susumu Sato

Shozo Kaneko

Haruaki Hirayama

Yasuhiro Takeuchi

Kimishiro Tokuda

Shigeo Hasegawa

Hiroshi Uchida

Tomofumi Yamashita

Masakatsu Minowa

Nobuyuki Ishinaga

Takafumi Shimada

Junichi Watanabe

Masato Kaneko

Toshiyuki Takegawa

Katsuhiko Shinoda

Shinobu Mogi

Setsuo Omoto

Tsugio Yamamoto

Toshiro Kobayashi

Masayasu Sakai

Toshiko Nishida

Kenichi Okada

Toru Harada

Kenji Iwasaki

Tsuyoshi Ohishi

Asahiro Onuma

Hiroaki Ogasawara

Kensuke Niwa

Hideaki Ohta

Shingo Saitou

Mizuki Watanabe

Masaaki Kuwa

Masahito Yamamoto

Yoshinori Shirasaki

Hideaki Takatani

Shouji Yokoyama

Keita Itagaki

Kentaro Tada

Yoshiro Ide

Motoki Numata

Tatsuo Kabata

In a method for producing hydrogen and carboxylic acid, a primary alcohol of 1 to 7 carbon atoms and water are reacted by being continuously introduced into a flow reactor packed with a solid catalyst consisting of an alloy of ruthenium and tin on a support and passed through the reactor under temperature and pressure conditions at which the water assumes a gaseous state. This method enables hydrogen and carboxylic acid to be produced in a high yield or at a high purity from a primary alcohol and water in a short time and by simple operations.

Method for producing hydrogen and carboxylic acid

A method of manufacturing a rotating bearing unit includes to cause one end surface in the axial direction of the forming punch (), formed by combining a plurality of punch elements () divided in the circumferential direction, which are displaceable in the axial direction and which are not displaceable in the circumferential direction, and having a processing teeth () at one end surface in the axial direction, to face the other end surface of the caulking section () in the axial direction. In this state, rolls () are rotated about the central axis (&#x3b1;) of the hub main body () while pressing the other end surface of the forming punch () in the axial direction with a pressing surface () of the roll () having a central axis (&#x3b2;) that is inclined with respect to the central axis (&#x3b1;) of the hub main body ().

Method and device for manufacturing bearing unit

A steering rack () meshes with a pinion rotatably driven by the input shaft () of a steering gear () constituting an automotive steering device. The steering rack () is provided with a an axially extending rod part () of round cross section, and a plurality of rack teeth () formed on a radial one side surface of an axial portion of the rod part (), the rack teeth () meshing with the pinion. At least one dummy tooth () is formed in portions that are axial parts of the rod part () and are adjacent to both axial sides of the plurality of rack teeth (). The dummy tooth () has a tooth height less than the rack teeth () and does not mesh with the pinion.

Steering rack and method for manufacturing the same

Construction is achieved that, together with preventing the occurrence of damage to a mandrel, is able to improve precision of the shape of a ring-shaped member after processing. A mandrel includes a pair of support shaft sections that are provided so as to be separated in the axial direction and so as to be concentric with each other, and a rolling shaft section that is concentrically provided in the axial direction between the pair of support shaft sections. One of the support shaft sections is provided in a state in which displacement in the axial direction with respect to the rolling shaft section is regulated. The other support shaft section is provided in a state in which displacement in a direction going away from the rolling shaft section is possible when a pressing force is applied in that direction.

Method for manufacturing ring-shaped member and manufacturing apparatus for same

A method for manufacturing an annular member includes: a cylindrical member forming step of forming a cylindrical member with an annular shape from a round bar material; and a cutting and separating step of cutting and separating the cylindrical member over an axial direction of the cylindrical member while rotating the cylindrical member, the cylindrical member being cut and separated by a shear force obtained by restraining molds, which apply an urging force to an outer circumferential surface of the cylindrical member, and by a restraining mold, which is provided with a gap on the outer circumferential surface of the cylindrical member, among a plurality of restraining molds provided on an inner circumferential surface side and an outer circumferential surface side of the cylindrical member along the axial direction, to obtain a plurality of annular members.

Method for manufacturing annular member

A method for manufacturing a rolling bearing unit is provided to periodically reciprocate a stage () in a vertical direction by rotating and driving a servo motor () while rotating a roll about a central axis of a hub main body using a roll driving motor () in a state in which a processing surface of the roll is pressed against other end surface of a caulking section in an axial direction. A period of the reciprocation is restricted by a relation between a rotation position of the roll about the central axis of the hub main body and an engaged state between concave sections, which are sections between a plurality of processed teeth formed in the processing surface of the roll, and a face spline tooth formed by the concave section.

Method for manufacturing rolling bearing unit and method for manufacturing vehicle

A steering rack meshes with a pinion rotatably driven by the input shaft of a steering gear constituting an automotive steering device. The steering rack is provided with a an axially extending rod part of round cross section, and a plurality of rack teeth formed on a radial one side surface of an axial portion of the rod part, the rack teeth meshing with the pinion. At least one dummy tooth is formed in portions that are axial parts of the rod part and are adjacent to both axial sides of the plurality of rack teeth. The dummy tooth has a tooth height less than the rack teeth and does not mesh with the pinion.

A method and a system for producing a ring-shaped member. A punching process is carried out on an axial intermediate part of a first intermediate annular material so as to produce a pair of ring-shaped members. A punching step includes a step in which a first punching process is carried out over a first range of the axial intermediate part in the circumferential direction, and a step in which a second punching process is carried out over a second range of the axially-oriented intermediate part, which is at least partially different than the first range, in the circumferential direction. The first punching process is carried out such that at least one tab is formed. The second punching process is carried out such that at least one separate tab is formed, thereby producing the pair of ring-shaped members.

Method and system for producing ring-shaped member for vehicle, and synchronizer ring

A steering rack includes a rack shaft (), a plurality of rack teeth () formed on the rack shaft and each having a tooth trace inclined with respect to a first direction perpendicular to an axial direction of the rack shaft, and a dummy tooth () aligned with the rack teeth and formed on the rack shaft. The dummy tooth () is non-uniformly formed in a second direction parallel to the tooth trace of the rack tooth ().

Steering rack and manufacturing method therefor

A rotary press device () includes a restriction section () configured to restrict a motion of a roll () around a central axis of a roll () against movement of the roll () around a central axis of a hub main body () during rotary forging. In an example, the restriction section () has guide teeth () meshed with teeth formed on a processing surface of the roll ().

Method of manufacturing bearing unit, and rotary press device

There is provided a method for manufacturing ring-shaped members at a good yield and high production efficiency. To achieve this object, the following is performed. A single (a sequence of) forging produces a joined body formed by radially coupling four cylindrical portions with different inner diameter sizes. A cylindrical member that has the largest inner diameter size and a cylindrical member that has the third largest inner diameter size after the forging are employed as ring-shaped members without change. A rolling process is performed on respective cylindrical member that has the smallest inner diameter size and cylindrical member that has the second largest inner diameter size to obtain ring-shaped members. Thus, two sets of ring-shaped members are obtained as two sets of inner rings and outer rings.

Method for manufacturing ring-shaped member

A method of manufacturing a cylindrical ring member includes a step of forming a metal intermediate material having a cylindrical portion and a chamfering step by cold forging in which a normal chamfer portion is formed on an axial end peripheral edge of the cylindrical portion by pressing a radial end portion of an axial end surface of the cylindrical portion against an annular chamfering surface provided in a mold configuring a mold device. A chamfering step is performed by cold forging in a state where a preliminary chamfer portion, of which a width dimension in a radial direction is larger than a width dimension of the normal chamfer portion in a radial direction, is formed on the axial end peripheral edge of the cylindrical portion.

Method for manufacturing cylindrical ring member, bearing, clutch, vehicle, and machine

Provided is a method for manufacturing a bearing ring member, whereby processing cost can be reduced and a high degree of freedom in design is obtained, by disposing a metal material of a raw material (), the metal material having excellent metal characteristics such as fatigue strength and wear resistance and excellent processing characteristics such as hardenability, in a portion that flows to a portion (raceway surface, etc.) where the characteristics of the metal material are required during use or forging of a bearing ring member. The present invention is configured from a first metal part () in which the raw material () is formed in a cylindrical shape, and a second metal part () formed in a columnar shape by a metal material having more excellent metal characteristics or processing characteristics than the first metal part (). For example, the second metal part () is disposed in a portion on an inside diameter side of the first metal part (), which is a portion of the raw material () that flows to an outer raceway () of an outer ring () during forging.

Method for manufacturing bearing ring member

Construction is achieved that is capable of preventing the formation of radial streaks in the tip-end surfaces of teeth of hub-side face splines. When a swing center distance is taken to be L, a swing angle that is the inclination angle of the center axis of a rollwith respect to a main hub bodyis taken to be &#x3b8;, the pitch diameter of the hub-side face splinesis taken to be D, the number of teeth of the hub-side face splinesis taken to be N, and the number of teeth of a processing surfaceof the rollis taken to be N, the position relationship of the main hub bodyand the roll, or in other words, at least one of the swing center distance L, the swing angle &#x3b8;, and the pitch circle diameter Dis regulated so that the relationship Nh/Nr=cos &#x3b8;+(2L/D)&#xb7;sin &#x3b8; is satisfied.

Method for manufacturing rolling bearing unit

Growing community of inventors

Tokyo, Japan

Kazuto Kobayashi