# US 10,500,832 B2 · Systems and methods for additive manufacturing rotating build platforms

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- Number: US 10,500,832 B2
- Document ID: US10500832B2
- Status: Granted
- Kind: B2
- Application number: 15/408,843
- Filed: 2017-01-18
- Published: 2018-07-19
- Granted: 2019-12-10
- Earliest claimed: 2017-01-18
- Assignees: General Electric Company
- Applicants: General Electric Company
- Inventors: David Charles Bogdan, Jr.; Jason Harris Karp; Justin John Gambone, Jr.; Lang Yuan; Jinjie Shi; Victor Petrovich Ostroverkhov; Marshall Gordon Jones; William Thomas Carter; Harry Kirk Mathews, Jr.; Kevin George Harding
- Web page: https://patentgrep.com/patent/US10500832B2

## CPC

- B29C 64/153: using layers of powder being selectively joined, e.g. by selective laser sintering or melting
- B22F 10/28: Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
- B22F 10/322: of the gas flow, e.g. rate or direction
- B22F 12/37: Rotatable
- B22F 12/49: Scanners
- B22F 12/67: Blades
- B22F 12/70: Gas flow means
- B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor
- B22F 10/36: of energy beam parameters
- B22F 12/226: {for rotary motion}
- B22F 12/44: characterised by the configuration of the radiation means
- B22F 2201/00: Treatment under specific atmosphere
- B22F 2203/00: Controlling
- B22F 2999/00: Aspects linked to processes or compositions used in powder metallurgy
- B29C 64/245: Platforms or substrates (support structures intended to be sacrificed after manufacture B29C64/40)
- B29C 64/364: Conditioning of environment
- B33Y 10/00: Processes of additive manufacturing
- Y02P 10/25: Process efficiency
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- 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
- 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

An additive manufacturing system is configured to manufacture a component. The additive manufacturing system includes a laser device, a build platform, a first scanning device, and an air knife. The laser device is configured to generate a laser beam. The component is disposed on the build platform. The air knife is configured to channel an inert gas across the build platform. The first scanning device is configured to selectively direct the laser beam across the build platform. The laser beam is configured to generate successive layers of a melted powdered build material on the component and the build platform. The build platform is configured to rotate the component relative to the air knife.

## Claims

### Claim 1

An additive manufacturing system configured to manufacture a component, said additive manufacturing system comprising:
a laser device configured to generate a laser beam;
a build platform, the component disposed on a surface of said build platform;
a recoater configured to coat a powdered build material on the component and said build platform;
an air knife configured to channel a flow of inert gas across said build platform;
a plenum configured to channel the flow of inert gas away from said build platform, said plenum configured to independently rotate relative to said build platform, said laser device, said recoater, and said air knife; and
a first scanning device configured to selectively direct the laser beam across said build platform, the laser beam configured to generate successive layers of a melted powdered material on the component and said build platform, wherein said build platform configured to rotate the component relative to said air knife about an axis that is oriented perpendicular to the surface of said build platform.

### Claim 2 (depends on 1)

The additive manufacturing system in accordance with claim 1 further comprising at least one wall defining an air-locked build chamber, said air knife and said build platform disposed within said air-locked build chamber.

### Claim 3 (depends on 1)

The additive manufacturing system in accordance with claim 1, wherein said build platform is configured to rotate the component relative to said air knife and said laser device.

### Claim 4 (depends on 1)

The additive manufacturing system in accordance with claim 1, wherein said build platform is configured to rotate the component relative to said air knife between generation of successive layers of the melted powdered material.

### Claim 5 (depends on 4)

The additive manufacturing system in accordance with claim 4, wherein said build platform is configured to rotate the component in a range from and including about 30 degrees to and including about 60 degrees relative to said air knife between generation of successive layers of the melted powdered material.

### Claim 6 (depends on 4)

The additive manufacturing system in accordance with claim 4, wherein said build platform is configured to rotate the component in a range from and including about 90 degrees to and including about 180 degrees relative to said air knife between generation of successive layers of the melted powdered material.

### Claim 7 (depends on 1)

The additive manufacturing system in accordance with claim 1, wherein said build platform is configured to descend while rotating.

### Claim 8

An additive manufacturing system configured to manufacture a component, said additive manufacturing system comprising:
a laser device configured to generate a laser beam;
a build platform, the component disposed on a surface of said build platform;
an air knife configured to channel a flow of inert gas across said build platform;
a plenum configured to channel flow of inert gas away from said build platform;
a recoater configured to coat a powdered build material on the component and said build platform;
at least one wall defining an air-locked build chamber, wherein said air knife, said recoater, and said build platform are disposed within said air-locked build chamber, and wherein said air knife, said recoater, and said build platform are configured to independently rotate relative to said air-locked build chamber; and
a first scanning device configured to selectively direct the laser beam across said build platform, the laser beam configured to generate successive layers of a melted powdered material on the component and said build platform, wherein said build platform and said recoater are configured to independently rotate relative to each other, said build platform configured to rotate about an axis oriented perpendicular to the surface of said build platform.

### Claim 9 (depends on 8)

The additive manufacturing system in accordance with claim 8 further comprising a filter and a blower, said filter and said blower coupled in flow communication with said plenum, wherein said filter, said blower, and said plenum are configured to channel the flow of inert gas away from said build platform.

### Claim 10 (depends on 8)

The additive manufacturing system in accordance with claim 8, wherein said plenum is configured to independently rotate relative to said build platform, said laser device, said recoater, and said air knife.

### Claim 11 (depends on 8)

The additive manufacturing system in accordance with claim 8, wherein said plenum is coupled to said air knife, said plenum, and said air knife are configured to rotate relative to said build platform, said laser device, and said recoater.

### Claim 12 (depends on 8)

The additive manufacturing system in accordance with claim 8, wherein said recoater is coupled to said laser device, said recoater and said laser device are configured to rotate relative to said build platform.

### Claim 13

A method of manufacturing a component with an additive manufacturing system, the additive manufacturing system including a build platform, an air knife, a recoater, a plenum, and a laser device, the component disposed on a surface of the build platform, the air knife configured to channel a flow of inert gas across the build platform, the plenum configured to channel the flow of inert gas away from the build platform, said method comprising:
spreading a powdered build material on the build platform and the component with the recoater;
generating a laser beam with the laser device, the laser beam directed toward the powdered build material;
generating a layer of a melted powdered build material with the laser beam;
rotating the build platform relative to the air knife about an axis oriented perpendicular to the surface of the build platform; and
independently rotating the plenum relative to the build platform, the laser device, the recoater, and the air knife.

### Claim 14 (depends on 13)

The method of claim 13 further comprising rotating the recoater relative to the build platform.

### Claim 15 (depends on 13)

The method of claim 13, wherein rotating the build platform relative to the air knife comprises rotating the build platform in a range from and including about 30 degrees to and including about 60 degrees relative to the air knife.

### Claim 16 (depends on 13)

The method of claim 13, wherein rotating the build platform relative to the air knife comprises rotating the build platform in a range from and including about 90 degrees to and including about 180 degrees relative to the air knife.

### Claim 17 (depends on 13)

The method of claim 13 further comprising rotating the laser device relative to the build platform.