Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Compressor Corporation

Olympus Corporation

Olympus Medical Systems Corporation

Hiroki Takagi

Koshiro Niihara

Daisuke Tanaka

Hiroshi Nakajima

Nobuyori Yagi

Kazutoshi Yokoo

Yujiro Watanabe

Hiroko Kitamoto

Shimpei Okayasu

Yoshiki Tazawa

Daisuke Kawada

Yusuke Kawai

Shinichiro Tokuyama

Ken Tamura

Tsutomu Urakawa

Kazutoshi Yoko

Akihiko Morikawa

Makoto Tanabe

Takuya Takechi

Daisuke Kawanishi

Kenji Itagaki

Kaito Nakahara

Koichi Akahori

An endoscope optical connector includes: a sleeve which houses an end portion of an optical fiber inside the sleeve; an inward flange provided on an inner circumference of the sleeve; a glass member arranged inside the sleeve so as to face an end surface of the optical fiber; a cap member which is attached to the sleeve and which fixes the glass member between the cap member and the inward flange; a first O-ring interposed between the cap member and the glass member; a second O-ring interposed between the glass member and the inward flange and having a glass transition point lower than a glass transition point of the first O-ring; and an inert gas filling the inside of the sleeve.

Endoscope optical connector and endoscope

An optical fiber bundle manufacturing apparatus includes: a winding member; a guide member movable in a direction parallel to a rotary axis, the guide member being configured to guide an optical fiber wire to any one of first winding positions, a converging winding position and second winding positions; and a processor configured to perform processing to move the guide member such that a first branching portion branching into p branches, a converging portion converging the first branching portion branching into p branches into one, a second branching portion branching into q branches, and a connecting portion connecting the first branching portion and the second branching portion are formed in this order by the optical fiber wire.

Optical fiber bundle manufacturing apparatus, light guide, endoscope having light guide, and method of manufacturing optical fiber bundle

A cutting tool comprises a shank having an insertion portion protruding from a shank main body, a head in which an insertion hole into which the insertion portion is inserted is formed, and a spacer disposed in a gap between the shank main body and the head. The insertion portion has a tapered outer circumferential surface which gradually decreases in diameter from the other side toward one side in the axial direction. The insertion hole has a tapered inner circumferential surface coming into surface contact with the tapered outer circumferential surface. A head end surface of the head which faces the other side in the axial direction comes into surface contact with a surface facing one side in the axial direction of the spacer.

Cutting tool and method of assembling cutting tool

When a closed type impeller is manufactured from one block, a rough cutting process of cutting a flow path region of a block using a rough cutting tool, and a residue-cutting process of cutting a cutting residue in the cutting process using a residue-cutting tool are executed. The residue-cutting tool has a tool main body having a blade formed on an outer periphery thereof, and a handle having the tool main body fixed to a distal end thereof. A maximum outer diameter of the tool main body is larger than a minimum outer diameter of the handle. Further, the tool main body has a rear blade directed in a direction including a tool rear side component.

Method for manufacturing centrifugal rotary machine and method for manufacturing impeller thereof

An impeller includes a disk that has tubular first and second disk members, a blade that is integrally provided with the second disk member, and a cover that is integrally provided with the blade and covers the blade. The first disk member has a ring-shaped recessed portion therein. The second disk member has a ring-shaped engaging portion that is configured to engage with the first disk member by being inserted into the recessed portion. A first shrink-fitting portion is provided in a boundary portion between an outer circumferential surface of the engaging portion and an inner circumferential surface of the recessed portion that comes into contact with the outer circumferential surface.

Impeller, rotary machine, method for manufacturing impeller, and method for manufacturing rotary machine

The present invention relates to an impeller manufacturing method in which a thermal cycle is performed on an assembly body with a brazing material formed of a Ni-containing Au alloy being placed at a bond portion of at least two impeller constituent members. The thermal cycle includes a temperature increasing process with a temperature increasing rate of 20&#xb0; C./hr. to 100&#xb0; C./hr., the process including a first intermediate retention and a second intermediate retention each keeping the temperature, the first intermediate retention performed in a temperature range of 500&#xb0; C. to 850&#xb0; C. and the second intermediate retention performed in a temperature range of 850&#xb0; C. to 950&#xb0; C. (but not including 850&#xb0; C.). In the thermal cycle, the temperature is increased in a temperature range exceeding 950&#xb0; C. after the second intermediate retention at a rate lower than that before the second intermediate retention.

Impeller brazing method

A method for manufacturing a machine component includes a process of estimating post-heat-treatment strength for the intermediate form of a base material after a certain mechanical working process is performed, and a process of comparing the estimated strength with reference strength required for a final form. According to a result of the comparison, heat treatment of the base material is performed after one of the mechanical working processes is performed.

Method for manufacturing machine component, and rotary machine equipped with impeller manufactured by means of this method

While a winding member is making one rotation, an optical fiber is once skewed relative to the circumferential direction and further shifted by a desired length in the width direction of a circumferential surface. In this state, the winding member winds up the optical fiber. This operation is performed in the same direction every rotation when the winding member rotates (N&#x2212;1) times. Next, in the N-th rotation of the winding member, a guide member performs the guide to the optical fiber to skew reversely to the direction of shifting in the (N&#x2212;1) rotations of the winding member.

Manufacturing method of optical fiber bundle

A heat treatment method of an impeller includes a heat treatment preparation process of arranging the impeller within a vacuum furnace, an impeller covering process of covering an outer peripheral surface of the impeller in a circumferential direction by a heat uniformizing jig made of a radiation conversion material which radiates transferred heat as radiant heat, and a heat treatment process including a heating process and a cooling process in which heat treatment is performed by heating or cooling the impeller covered with the heat uniformizing jig from the periphery using a heater.

Heat treatment method

A method for manufacturing an impeller includes providing a disc and a cover separate from the disc, one of the cover and the disc having integrally formed blades and the other one of cover and the disc having a first joint surface, joining the disc and the cover to each other by brazing in a state in which a first brazing filler metal is interposed between the first joint surface and a second joint surface provided on the blades, and during the joining operation, maintaining a space between the first joint surface and the second joint surface by providing a spacer on an outer periphery side of the impeller. The thickness of the spacer is smaller than the thickness of the first brazing filler metal before melting. The spacer is formed integrally with the blade or is formed integrally with said other one of the cover and the disc.

Method for manufacturing impeller

Provided is a method for manufacturing an optical fiber that is inserted into an insertion portion of an endoscope and guides light, wherein inside an upright fiber drawing furnace, inside a hollow clad tube including a clad glass having a viscosity &#x3b7;of 5.0&#x3c;Log &#x3b7;&#x3c;7.0 at a temperature at which a viscosity &#x3b7;of a core glass becomes Log &#x3b7;=3.5, the core glass in a fluidized state runs down by gravity, whereby the core glass and the clad glass are integrated.

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Tokyo, Japan

Hiroki Takagi