Additive manufacturing apparatus, additive manufacturing system, and additive manufacturing method

Patent metadata

Field	Value
Publication number	US-11090764-B2
Application number	US-201816317100-A
Country	US
Kind code	B2
Filing date	Apr 12, 2018
Priority date	Apr 12, 2018
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

An additive manufacturing apparatus performs additive machining by controlling a machining head that includes a wire nozzle to feed a wire to a machining region on a surface of a base material, a beam source capable of emitting a beam to an end of the wire, and a gas nozzle placed such that the beam source is interposed between the gas nozzle and the wire nozzle, the gas nozzle directing a gas toward the machining region, and the additive manufacturing apparatus includes a machining-condition selection unit to obtain an angle that is formed between a direction in which the wire is fed and a travel direction of the machining head, when viewed in a direction in which the beam is emitted, and to select a machining condition for the additive machining on the basis of the angle.

First claim

The invention claimed is:

1. An additive manufacturing apparatus that performs additive machining by controlling a machining head that includes a wire nozzle to feed a wire material to a machining region on a surface of a base material, a beam source capable of emitting a beam to an end of the wire material, and a gas nozzle placed such that the beam source is interposed between the gas nozzle and the wire nozzle, the gas nozzle directing a gas toward the machining region, the apparatus comprising:
machining-condition selection circuitry to obtain an angle that is formed between a direction in which the wire material is fed and a travel direction of the machining head, when viewed in a direction in which the beam is emitted, and to select one of a plurality of machining conditions for the additive machining in accordance with the angle,
wherein the plurality of machining conditions are determined at least in accordance with a sum of an area of a portion of the wire material and an area of a portion of a bead formed by the additive machining, the portion of the wire material and the portion of the bead being within a irradiation region of the beam as viewed in a direction in which the beam is emitted.

2. The additive manufacturing apparatus according to claim 1 , further comprising a machining condition table that stores the plurality of machining conditions, each of which is dependent on the angle, wherein:
the machining-condition selection circuitry obtains the angle on a basis of a machining program that specifies a machining path and selects the one of the plurality of machining conditions using the angle and the machining condition table.

3. The additive manufacturing apparatus according to claim 2 , wherein the machining condition table stores an output value of the beam and a gas pressure of the gas as the machining condition that is dependent on the angle.

4. The additive manufacturing apparatus according to claim 3 , wherein the machining condition table stores a beam profile that specifies intensity change within the irradiation region of the beam as the machining condition that is dependent on the angle.

5. The additive manufacturing apparatus according to claim 1 , wherein the plurality of machining conditions is determined in accordance with a percentage of the amount of beam irradiation of the base material.

6. An additive manufacturing system that performs additive machining by controlling a machining head that includes a wire nozzle to feed a wire material to a machining region on a surface of a base material, a beam source capable of emitting a beam to an end of the wire material, and a gas nozzle placed such that the beam source is interposed between the gas nozzle and the wire nozzle, the gas nozzle directing a gas toward the machining region, the additive manufacturing system comprising:
a machining condition table that stores a plurality of machining conditions, each of which is used for the additive machining and is dependent on an angle that is formed between a direction in which the wire material is fed and a travel direction of the machining head, when viewed in a direction in which the beam is emitted;
machining-condition selection circuitry to obtain the angle on a basis of a machining path and to select one of the plurality of machining conditions using the angle and the machining condition table; and
a numerical control apparatus to select the one of the plurality of machining conditions on a basis of a machining program containing information on the one of the plurality of machining conditions selected by the machining-condition selection circuitry and in accordance with the angle,
wherein the plurality machining conditions are determined at least in accordance with a sum of an area of a portion of the wire material and an area of a portion of a bead formed by the additive machining, the portion of the wire material and the portion of the bead being within a irradiation region of the beam as viewed in a direction in which the beam is emitted.

7. The additive manufacturing system according to claim 6 , wherein the machining condition table stores an output value of the beam and a gas pressure of the gas as the machining condition that is dependent on the angle.

8. The additive manufacturing system according to claim 7 , wherein the machining condition table stores a beam profile that specifies intensity change within the irradiation region of the beam as the machining condition that is dependent on the angle.

9. The additive manufacturing system according to claim 6 , wherein the plurality of machining conditions is determined in accordance with a percentage of the amount of beam irradiation of the base material.

10. An additive manufacturing method for performing additive machining by controlling a machining head that includes a wire nozzle to feed a wire material to a machining region on a surface of a base material, a beam source capable of emitting a beam to an end of the wire material, and a gas nozzle placed such that the beam source is interposed between the gas nozzle and the wire nozzle, the gas nozzle directing a gas toward the machining region, the method comprising:
obtaining an angle that is formed between a direction in which the wire material is fed and a travel direction of the machining head, when viewed in a direction in which the beam is emitted; and
selecting one of a plurality of machining conditions for the additive machining in accordance with the angle,
wherein the plurality of machining conditions are determined at least in accordance with a sum of an area of a portion of the wire material and an area of a portion of a bead formed by the additive machining, the portion of the wire material and the portion of the bead being within a irradiation region of the beam as viewed in a direction in which the beam is emitted.

11. The additive manufacturing method according to claim 10 , wherein the plurality of machining conditions is determined in accordance with a percentage of the amount of beam irradiation of the base material.

Assignees

• Mitsubishi Electric Corp

Inventors

• Kayashima Shun
• Sumi Nobuyuki
• Iriguchi Kenji
• Uozumi Seiji

Classifications

• B23K26/342 Primary

  Build-up welding · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B23K9/04

  Welding for other purposes than joining, e.g. built-up welding · CPC title

• B23K15/00

  Electron-beam welding or cutting · CPC title

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title