Alexander J Dunbar

US Patent:

20210387263, Dec 16, 2021

Filed:

Jun 2, 2021

Appl. No.:

17/337000

Inventors:

- Burlington MA, US
Alexander Dunbar - Waltham MA, US
Raghav Aggarwal - Somerville MA, US
Matthew Sweetland - Bedford MA, US
Martin C. Feldmann - Somerville MA, US

Assignee:

VulcanForms Inc. - Burlington MA

International Classification:

B22F 10/85
B23K 26/06
B23K 26/082
B23K 26/342
B33Y 10/00
B33Y 30/00
B33Y 50/02
B22F 10/28
B22F 12/41

Abstract:

Systems and methods for additive manufacturing are described. In some embodiments, a method of controlling the one or more laser energy sources of an additive manufacturing system may be based at least in part on a scan angle and/or desired energy density. Systems and methods for controlling melt pool spacing are also described.

US Patent:

20200230745, Jul 23, 2020

Filed:

Jan 22, 2020

Appl. No.:

16/749464

Inventors:

- Waltham MA, US
Alexander Dunbar - Waltham MA, US
Matthew Sweetland - Bedford MA, US

Assignee:

VulcanForms Inc. - Waltham MA

International Classification:

B23K 26/342
B23K 26/082
B23K 26/062
B23K 26/03
B33Y 10/00
B33Y 30/00
B33Y 50/02

Abstract:

Laser control systems and related methods for controlling arrays of lasers are disclosed. A laser control system may include a first controller configured to generate a trigger signal based on a position of a laser array, and a second controller configured to send a firing signal to one or more lasers of the laser array upon receiving the trigger signal. The one or more lasers may be selected based on a desired pattern of laser energy to be formed at a particular position of the laser array.

US Patent:

20200061710, Feb 27, 2020

Filed:

Aug 14, 2019

Appl. No.:

16/540243

Inventors:

- University Park PA, US
Alexander J. Dunbar - Waltham MA, US
Edward W. Reutzel - State College PA, US

International Classification:

B22F 3/105
G01J 3/02
G01J 3/443
B33Y 50/02

Abstract:

Embodiments of the systems can be configured to receive electromagnetic emissions of a substrate (e.g., a build material of a part being made via additive manufacturing) by a detector (e.g., a multi-spectral sensor) and generate a ratio of the electromagnetic emissions to perform spectral analysis with a reduced dependence on location and orientation of a surface of the substrate relative to the multi-spectral sensor. The additive manufacturing process can involve use of a laser to generate a laser beam for fusion of the build material into the part. The system can be configured to set the multi-spectral sensor off-axis with respect to the laser (e.g., an optical path of the multi-spectral sensor is at an angle that is different than the angle of incidence of the laser beam). This can allow the multi-spectral sensor to collect spectral data simultaneously as the laser is used to build the part.