Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Heavy Industries Machine Tool Co., Ltd.

Technology Research Association for Future Additive Manufacturing

Yasuyuki Fujiya

Shuho Tsubota

Takehisa Okuda

Ryuichi Narita

Masahiko Shimizu

Kazuhiro Yoshida

Shuji Tanigawa

Saneyuki Goya

Akiko Inoue

Yoshinao Komatsu

Takahiro Tachibana

Masao Watanabe

Ken Ishii

Osamu Hasegawa

Hiroharu Oyama

Ryota Ozaki

Takaaki Kaikogi

Katsuya Sennyu

Takumi Hori

Masashi Kitamura

Motonari Machida

Yuki Kani

Satoru Zenitani

Masayuki Ota

Keisuke Kamitani

Claus Thomy

Naoki Suda

Thomas Seefeld

Takafumi Aoyama

Tadashi Itoyama

Yasutaka Banno

Dieter Tyralla

A laser machining device includes: a laser irradiation unit that forms a machining groove that has one end opening to an end section of a workpiece and the other end thereof closed, as a result of scanning a workpiece surface from an end section of the workpiece and laser machining the workpiece; and a nozzle unit that sprays a gas across an irradiation zone of the workpiece surface created by the laser irradiation unit. The nozzle unit is configured so as to increase the flowrate of the gas supplied to the irradiation zone, from one end to the other end of the machining groove.

Laser machining device

This laser processing device is provided with a laser radiating unit which forms a processed groove extending in a scanning direction on a workpiece, by subjecting the workpiece to laser processing while scanning the surface of the workpiece, and a nozzle portion which has a plurality of ejection holes arranged side by side in the scanning direction, and which ejects a gas toward the processed groove from each of the ejection holes. With this laser processing device, since a plume is eliminated by ejecting gas into the processed groove by means of the nozzle portion, the formation of a heat affected layer by the plume can be suppressed to an even greater extent.

Laser processing device

A gas supply device for a manufacturing device includes an inert gas supply source that supplies inert gas, a supply line connected to the inert gas supply source, a nitrogen removal portion that is provided on the supply line and that removes at least a portion of nitrogen in the inert gas, and an oxygen removal portion that is provided on the supply line and that removes at least a portion of oxygen in the inert gas.

Gas supply device for manufacturing device. atomizing device, 3D additive manufacturing device, additive manufacturing system, and shaped object and gas supply method for manufacturing device

An additive manufacturing method includes: forming a powder bed by supplying a raw material powder; and irradiating the raw material powder that forms the powder bed with a light beam having an intensity distribution of a second or higher order mode or of a top hat shape.

Additive manufacturing method and additive manufacturing apparatus

A weldment manufacturing method includes drilling that forms a hole on a workpiece, feeding a filler material to the hole and putting the filler material on a bottom of the hole, and melting the filler material by emitting a laser beam to the hole while scanning with the laser beam, so as to fill the hole with the melted filler material. By repeating the feeding and the melting, a weld repairing portion filling the hole is formed.

Weldment manufacturing method, weldment manufacturing system, and weldment

Provided is a method for bonding dissimilar metals to each other, the method comprising: dissimilar metal layer-forming steps (P), (P), (P) for supplying, to form dissimilar metal layers; a second metal layer-forming step (P) for supplying, on the surface of the dissimilar metal layers, a filler material formed of a second metal, and heating the filler material formed of the second metal to a temperature equal to or higher than a melting point of the second metal, to form a second metal layer formed of the second metal; and a second material-to-be-bonded welding step (P) for welding a second material to be bonded that is formed of the second metal, onto the second metal layer.

Method for bonding dissimilar metals to each other

A laser device includes a condensing assembly for condensing laser light output from a laser oscillator and a cover for accommodating the condensing assembly, the cover including protection windows permeable to the laser light on an optical path of the laser light. The protection windows include at least one first protection window having a positive refractive index temperature coefficient and at least one second protection window having a negative refractive index temperature coefficient, the at least one first protection window and the at least one second protection window being arranged along the optical path of the laser light.

Laser device and processing device

An additive manufacturing method of manufacturing a product by laminating metal includes: laminating the metal so as to form a half-finished product of the product and a support; and spraying dry ice pellets having a particle shape to the support, after the laminating.

Additive manufacturing method

A method of welding erosion resistance metallic material is a method of welding erosion resistance metallic material to a base element () of a turbine blade leading edge portion (A). The method includes the steps of: forming a curved surface in the leading edge portion (A) to which the erosion resistance metallic material is applied so that a radius R of the curved surface is larger than thickness t of the base element (); and welding the erosion resistance metallic material to the leading edge portion (A).

Method of welding erosion resistance metallic material and turbine blade

A laser welding method of the present invention is a laser welding method for irradiating with a laser beam a groove portionformed along a circumferential direction by butting axial end portions of cylindrical bodiestogether to weld the groove portion, the method comprising: a welding process Sof irradiating the groove portionwith the laser beam over the entire circumference to weld the groove portion; and a strain correction process Sof irradiating the groove portionwith the laser beam over the entire circumference, the laser beam having a heat input amount smaller than a heat input amount per unit area of the laser beam emitted in the welding process S

Laser welding method, laser welding apparatus, and cylindrical body

A nozzle as a welded structure includes a nozzle body, and a buckling prevention fin joined to the nozzle body by laser welding, in which an end of the buckling prevention fin before laser welding is disposed to face the nozzle body, an installed state of the nozzle body and the buckling prevention fin includes an installed state in which a gap is formed between the nozzle body and the buckling prevention fin, and the buckling prevention fin has a beveled portion which is beveled at the end facing the nozzle body.

Welded structure, laser welding method, and laser welding device

A movable vacuum welding device () includes a vacuum chamber () having an edge section () opposite to a surface of a welding target (T) and forming a vacuum space between the surface of the welding target (T) and the vacuum chamber (), a seal section () interposed between the edge section () and the welding target (T) throughout the entire circumference of the edge section (), a welding head () configured to perform welding on the surface of the welding target (T) in the vacuum space, and a preload unit () configured to previously apply a load to the seal section (). The seal section () includes a first seal member () formed of an elastic material and extending along the edge section (), and a second seal member () disposed at least a rear side in a relative moving direction in which a welding bead (W) passes and having higher flexibility than the first seal member ().

Movable vacuum welding device

Growing community of inventors

Tokyo, Japan

Yasuyuki Fujiya