Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Takeshi Yamada

Shinji Sato

Takemasa Yamasaki

Tatsuya Fujii

Masatoshi Hida

Shuo Huang

Keisuke Okita

Eisuke Kurosawa

An excess metal amount setting method includes: a thermal shrinkage prediction step of predicting a thermal shrinkage amount in the deposited body after manufacturing; a thermal shrinkage modifying step of obtaining a thermal deformation modifying profile by expanding a target profile according to the thermal shrinkage amount; a release strain prediction step of predicting an elastic deformation amount due to release strain of the deposited body after machining; an elastic deformation modifying step of obtaining an elastic deformation modifying profile by deforming the thermal deformation modifying profile according to the elastic deformation amount in a direction opposite to a deformation direction due to the release strain; and an excess metal amount setting step of adjusting an outer edge shape of the deposited body so that an excess metal amount from the elastic deformation modifying profile to an outer edge of the deposited body falls within a predetermined reference range.

Method for setting excess thickness, device for setting excess thickness, method for producing shaped object, and program

A method for manufacturing an additively-manufactured object, includes: an additively-manufacturing step of building a layered body by depositing a weld bead obtained by melting and solidifying a filler metal, the layered body having an opening along a forming direction of the weld bead and an internal space surrounded by the weld bead; and a closing step of forming a closing wall portion connecting an edge portion of the opening with the weld bead for closing. In the additively-manufacturing step, the opening is formed with a width dimension larger than a bead width of the weld bead, and in the closing step, the closing wall portion having a width dimension larger than the bead width is formed by the weld bead to close the opening.

Method for manufacturing laminated molding, and laminated molding

A building time for building an additively-manufactured object is calculated on the basis of the inter-pass time and the welding pass time and is compared with a preset upper limit value, and welding conditions in a depositing plan are repeatedly modified until the building time is equal to or less than the upper limit value. Alternatively, corrections are repeatedly performed until the shape difference between a building shape of built-up object shape data relating to the additively-manufactured object created on the basis of the inter-pass time and the inter-pass temperature, and a building shape of three-dimensional shape data, is smaller than a near net value.

Lamination planning method for laminate molded object, and laminate molded object manufacturing method and manufacturing device

A method for manufacturing an additively-manufactured object in which deposition is performed by melting and solidifying a metal depending on three-dimensional shape data of a target shape, includes: acquiring the three-dimensional shape data; creating a deposition plan in which a formation track and a heating condition of the metal are determined; determining a difference between a shape of the additively-manufactured object that thermally contracts by cooling after deposition and a shape of the three-dimensional shape data by an operation; modifying the deposition plan until the difference falls within a predetermined allowable range; and additively manufacturing the additively-manufactured object based on the deposition plan in which the difference falls within the allowable range.

Laminated molded object production method and production device

An additively manufactured object formed by depositing weld bead layers, each of the weld bead layers being obtained by melting and solidifying a filler metal made of a mild steel, the additively manufactured object includes a plurality of the weld bead layers having a ferrite phase with an average grain diameter of 11 &#x3bc;m or less in a part except for a surface oxide film.

Laminated molding and method of manufacturing laminated molding

A method for designing an additively-manufactured object includes: a slicing step of slicing a shape of the additively-manufactured object into weld bead layers each having a height corresponding to one bead layer using data of the shape of the additively-manufactured object, thereby generating a plurality of virtual bead layers; a reference direction setting step of setting, as a reference direction, a direction in which the sliced layer of the additively-manufactured object is continuously provided and extended in an intermediate layer disposed at a deposition-direction center of the plurality of virtual bead layers; and a bead adjusting step of adjusting a bead size of the weld bead to be formed in the plurality of virtual bead layers depending on a bead shape in a section perpendicular to the reference direction.

Method for designing laminate molded article, production method, production device, and program

In the present application, a shaped article W is produced, the shaped article including: a plurality of blades provided around a shaft, with an interval disposed therebetween in the circumferential direction; and curved surface-shaped recesses present in between the blades. This method for producing a shaped article includes: a shaping step, in which welding beads where filler material has been melted and solidified at the peripheral surface are layered on a base material having a circular cross-section of a greater radius than the bottom circle that passes through the lowest part of the recess, thus forming a shaped section that will become a blade; and a cutting step in which part of the surface of the shaped section and the peripheral surface of the base material is cut to form a blade, and the recesses between the blades are also formed.

Method for producing shaped article and shaped article

A method for joining an additively-manufactured component includes welding a plurality of additively-manufactured components via a weld joint to fabricate an integral structure. The additively-manufactured components are built by repeatedly depositing a weld bead layer of a next layer on a weld bead layer formed of a weld bead obtained by melting and solidifying a filler metal by use of an arc, and the weld joint is built along with the deposition.

Joining method and structure for laminate shaping component, and laminate shaping component

A method for producing an additively manufactured object includes melting and solidifying a filler metal to form weld beads and depositing the weld beads adjoining each other, thereby forming a weld-bead layer, and repeatedly depositing a next weld-bead layer on the formed weld-bead layer to conduct additive manufacturing. The method includes a bead formation step of forming a new weld bead so as to fill a recess formed by at least three of the already formed weld beads, in a cross-section perpendicular to a longitudinal direction of the weld beads.

Method and apparatus for manufacturing layered model

Using three-dimensional shape data, the shape of a blade, which is an additive manufacturing product, is divided into multiple layers according to the height of a bead. Each layer of the additive manufacturing product that has been divided into multiple layers is divided by fitting regions of a set shape. By determining connecting lines for connecting the divided regions to each other and computing the extension directions of protrusions, planned lines for bead formation along said extension directions are determined. The additive manufacturing product is shaped by forming beads along planned bead formation lines.

Additively-manufactured object by forming beads along a formation projected line of beads

A method for producing a built-up object, includes: producing maps beforehand, the maps indicating bead heights BH and bead widths BW corresponding to a base-surface inclination angle &#x3b8; and a track inclination angle &#x3c6;, in which the base-surface inclination angle is an angle between a base surface on which the weld beads are to be formed and a vertical direction, and the track inclination angle is an angle between a track direction of the torch and a vertical direction on the base surface; selecting a bead height BHand a bead width BWfrom the maps correspondingly to the base-surface inclination angle &#x3b8; and the track inclination angle &#x3c6; in forming a weld bead on the base surface; and forming the weld bead based on the selected bead height BHand bead width BW.

Method and device for manufacturing shaped objects

A method for producing a built-up object by melting and solidifying a filler metal to form weld beads on a base surface along a track for a torch and form the built-up object formed by the weld beads is provided. The built-up object includes a bead formation portion where a gravitational influence is maximum. The method includes: forming a supporting bead having a higher viscosity during weld-bead formation than other weld beads in the bead formation portion; and forming the other weld beads overlying the supporting bead.

Method for producing molded article, production device, and molded article

A method for producing an additively manufactured object includes melting and solidifying a filler metal by use of an arc, and depositing and forming a plurality of layers of molten beads to produce a built-up object, and the method includes: shaping the molten bead of a previous layer; and monitoring a temperature of the molten bead of the previous layer. Shaping of the molten bead of a next layer is started when the temperature of the molten bead of the previous layer is equal to or lower than an allowable interpass temperature.

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Hyogo, Japan

Takeshi Yamada