# US 12,005,529 B2 · Method for manufacturing laminated molding, and laminated molding

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- Number: US 12,005,529 B2
- Document ID: US12005529B2
- Status: Granted
- Kind: B2
- Application number: 17/287,771
- Filed: 2019-10-21
- Published: 2021-12-09
- Granted: 2024-06-11
- Earliest claimed: 2018-10-24
- Assignees: Kobe Steel, Ltd.
- Applicants: Kobe Steel, Ltd.
- Inventors: Shinji Sato; Takeshi Yamada; Tatsuya Fujii; Masatoshi Hida; Shuo Huang; Eisuke Kurosawa
- Web page: https://patentgrep.com/patent/US12005529B2

## CPC

- B22F 10/25: Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
- B23K 9/04: Welding for other purposes than joining, e.g. built-up welding
- B22F 10/38: to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
- B22F 12/222: {for motion along a direction orthogonal to the plane of a layer}
- B22F 12/224: {for motion along a direction within the plane of a layer}
- B23K 9/0216: {Seam profiling, e.g. weaving, multilayer}
- B23K 9/16: making use of shielding gas
- B23K 15/0086: {welding for purposes other than joining, e.g. build-up welding}
- B23K 2101/045: {Hollow panels}
- B23K 2101/24: Frameworks
- B33Y 10/00: Processes of additive manufacturing
- B33Y 40/00: Auxiliary operations or equipment, e.g. for material handling
- B33Y 80/00: Products made by additive manufacturing
- Y02P 10/25: Process efficiency
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

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.

## Claims

### Claim 1

A method for manufacturing an additively-manufactured object, comprising:
an additively-manufacturing step of building a layered body by depositing a plurality of weld beads obtained by melting and solidifying a filler metal, the layered body having an opening along a forming direction of a first weld bead of the plurality of weld beads and an internal space surrounded by the plurality of weld beads; and
a closing step of forming a closing wall portion connecting an edge portion of the opening with a second weld bead of the plurality of weld beads for closing,
wherein
in the additively-manufacturing step, at least a third weld bead of the plurality of weld beads is deposited on a base to build side wall portions facing each other, multiple weld beads of the plurality of weld beads having different width dimensions are deposited laterally from an upper end of a side portion of the side wall portions to build a connecting wall portion having the opening, the edge portion of the opening on the connecting wall portion is built by depositing a narrow weld bead of the plurality of weld beads having a bead width smaller than a bead width of another weld bead of the plurality of weld beads that builds another portion, and the opening is formed with a width dimension larger than a bead width of the second weld bead, and
in the closing step, and the closing wall portion having a width dimension larger than the bead width of the second weld bead is formed by the second weld bead to close the opening.

### Claim 2 (depends on 1)

The method for manufacturing an additively-manufactured object according to claim 1, wherein
in the closing step, a torch for forming the weld bead is weaved to form the closing wall portion.

### Claim 3

An additively-manufactured object, comprising:
a layered body formed 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 has an internal space surrounded by the weld bead; and
a closing wall portion configured to close the opening,
wherein
the opening has a width dimension larger than a bead width of the weld bead, and
the closing wall portion is formed from the weld bead and has a width dimension larger than the bead width of the weld bead.