Calibration systems for calibrating recoater devices of additive manufacturing systems and related program products

Patent metadata

Field	Value
Publication number	US-2018348367-A1
Application number	US-201715608231-A
Country	US
Kind code	A1
Filing date	May 30, 2017
Priority date	May 30, 2017
Publication date	Dec 6, 2018
Grant date	—

Abstract

Additive manufacturing systems (AMS) are disclosed. The AMS may include a build plate positioned directly on a movable build platform, and a recoater device positioned above the build plate. The recoater device may include a blade. Additionally, the AMS may include a calibration system operably connected to the recoater device. The calibration system may include at least one measurement device coupled or positioned adjacent to the recoater device, and at least one computing device operably connected to the measurement device(s). The computing device(s) may be configured to calibrate the recoater device by adjusting a height of the blade of the recoater device relative to a reference surface of a component of the AMS in response to determining a pre-build distance between the blade of the recoater device and the reference surface differs from a desired distance. The pre-build distance may be determined using the measurement device(s).

First claim

What is claimed is:

1 . An additive manufacturing system comprising:
a build plate positioned directly on a movable build platform, the build plate configured to receive a powder material; a recoater device positioned above the build plate, the recoater device including a blade; and a calibration system operably connected to the recoater device, the calibration system including:
at least one measurement device coupled to the recoater device or positioned adjacent the recoater device; and
at least one computing device operably connected to the at least one measurement device, the at least one computing device configured to calibrate the recoater device by:
adjusting a height of the blade of the recoater device relative to a reference surface in response to determining a pre-build distance between the blade of the recoater device and the reference surface differs from a desired distance,
wherein the pre-build distance is determined using the at least one measurement device.

2 . The additive manufacturing system of claim 1 , wherein the reference surface includes at least one of:
a build surface of the build plate, a surface of the movable build platform, or an exposed surface of a support table substantially surrounding the movable build platform.

3 . The additive manufacturing system of claim 1 , wherein the at least one computing device is configured to adjust the height of the blade of the recoater device by:
altering the height of the blade of the recoater device until the pre-build distance between the blade of the recoater device and the reference surface is identical to the desired distance.

4 . The additive manufacturing system of claim 1 , further comprising:
a track system coupled to the recoater device, the track system configured to move the recoater device over the build plate; and an actuator coupled to one of the track system or the recoater device.

5 . The additive manufacturing system of claim 4 , wherein the at least one computing device is operably connected to the actuator and is configured to adjust the height of the blade of the recoater device by:
actuating the actuator until the pre-build distance between the blade of the recoater device and the reference surface is identical to the desired distance.

6 . The additive manufacturing system of claim 1 , wherein the at least one computing device is configured to calibrate the recoater device by:
calculating the desired distance between the blade of the recoater device and the reference surface based on at least one of:
operational characteristics of at least one energy emitting device positioned above the build plate, or
build characteristics of a component formed on the build plate from the powder material.

7 . The additive manufacturing system of claim 1 , wherein the at least one measurement device of the calibration system includes at least one of:
at least one proximity sensor coupled to the recoater device, at least one proximity sensor positioned above the recoater device, or at least one camera positioned above the recoater device.

8 . The additive manufacturing system of claim 1 , wherein the at least one computing device is configured to calibrate the recoater device by:
adjusting the height of the blade of the recoater device relative to the reference surface in response to determining a mid-build distance between the blade of the recoater device and a layer of the powder material disposed over the build plate differs from the desired distance, wherein the mid-build distance is determined using the at least one measurement device.

9 . The additive manufacturing system of claim 1 , wherein the at least one computing device is configured to:
alter a position of at least one mirror of the at least one energy emitting device based on the determined, pre-build distance between the blade of the recoater device and the reference surface.

10 . A calibration system operably connected to a recoater device of an additive manufacturing system, the calibration system comprising:
at least one measurement device coupled to the recoater device or positioned adjacent the recoater device; and at least one computing device operably connected to the at least one measurement device, the at least one computing device configured to calibrate the recoater device by:
adjusting a height of a blade of the recoater device relative to a reference surface of the additive manufacturing system in response to determining a pre-build distance between the blade of the recoater device and the reference surface differs from a desired distance,
wherein the pre-build distance is determined using the at least one measurement device.

11 . The calibration system of claim 10 , wherein the reference surface of the additive manufacturing system includes at least one of:
a build surface of a build plate, a surface of a movable build platform, or an exposed surface of a support table substantially surrounding the movable build platform.

12 . The calibration system of claim 10 , wherein the at least one computing device is configured to adjust the height of the blade of the recoater device by:
altering the height of the blade of the recoater device until the pre-build distance between the blade of the recoater device and the reference surface is identical to the desired distance.

13 . The calibration system of claim 10 , wherein the at least one computing device is configured to adjust the height of the blade of the recoater device by:
actuating an actuator in communication with the recoater device until the pre-build distance between the blade of the recoater device and the reference surface is identical to the desired distance, the actuator operably connected to the at least one computing device.

14 . The calibration system of claim 10 , wherein the at least one computing device is configured to calibrate the recoater device by:
calculating the desired distance between the blade of the recoater device and the reference surface based on at least one of:
operational characteristics of at least one energy emitting device of the additive manufacturing system positioned above the recoater device, or
build characteristics of a component formed by the additive manufacturing system.

15 . A computer program product comprising program code stored on a non-transitory computer readable storage medium, which when executed by at least one computing device, causes the at least one computing device to calibrate a recoater device of an additive manufacturing system by performing processes including:
adjusting a height of a blade of the recoater device relative to a reference surface of the additive manufacturing system in response to determining a pre-build distance between the blade of the recoater device and the reference surface differs from a desired distance.

16 . The computer program product of claim 15 , wherein adjusting the height of the blade of the recoater device includes:
altering the height of the blade of the recoater device until the pre-build distance between the blade of the recoater device and the reference surface is identical to the desired distance.

17 . The computer program product of claim 15 , wherein the reference surface of the additive manufacturing system includes at least one of:
a build surface of a build plate, a surface of a movable build platform, or an exposed surface of a support table substantially surrounding the movable build platform.

18 . The computer program product of claim 15 , wherein the p

Assignees

• Gen Electric

Inventors

• Crear Donnell Eugene
• Pavlov Mikhail
• Roerig Felix Martin Gerhard
• Snelling Jr Dean Andrew

Classifications

• B29C64/153

  using layers of powder being selectively joined, e.g. by selective laser sintering or melting · CPC title

• B29C64/307

  Handling of material to be used in additive manufacturing · CPC title

• B33Y30/00

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title