Method and device for process monitoring

Patent metadata

Field	Value
Publication number	US-9952236-B2
Application number	US-201213981186-A
Country	US
Kind code	B2
Filing date	Jan 11, 2012
Priority date	Jan 28, 2011
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

Disclosed is a method for monitoring a generative fabrication process in which a component is formed in an installation space from a multiplicity of layers by using a three-dimensional data model and a following layer is fixed to a preceding layer by means of a high-energy beam. The method comprises detecting the component at least optically and detecting the installation space thermally during layer application. Also disclosed is a device for carrying out the method.

First claim

What is claimed is:

1. A generative fabrication process of a component, wherein the process comprises forming the component in an installation space from a multiplicity of layers by using a three-dimensional data model and fixing a following layer to a preceding layer by means of a high-energy beam, and wherein the process further comprises (i) carrying out an optical 3-D measurement of the component at least one of after a layer has been produced and after application of a powder, and (ii) carrying out thermography after application but before sintering or fusing of a powder.

2. The process of claim 1 , wherein data acquired during the fabrication process is assessed and, in the event of a maximum permissible deviation being exceeded, process parameters are changed.

3. The process of claim 1 , wherein at least one of after a layer has been produced and after application of a powder a 2-D measurement is carried out.

4. The process of claim 1 , wherein a color analysis of a last produced layer is carried out.

5. The process of claim 1 , wherein light reflected from a last produced layer is detected.

6. The process of claim 1 , wherein a nature of a produced layer is detected by means of eddy currents.

7. The process of claim 1 , wherein a melt bath produced by the high-energy beam is detected thermally.

8. The process of claim 7 , wherein a pyrometer for tracking the high-energy beam is used.

9. The process of claim 1 , wherein a classification of layer material is carried out and, based on a result thereof, a control of process parameters is carried out.

10. The process of claim 1 , wherein at least one of after a layer has been produced and after application of a powder a roughness is determined via a laser profiling method.

11. A device for carrying out the process of claim 1 , wherein the device comprises (a) at least one optical detection device for optical detection of at least one component layer by 3-D imaging and (b) at least one thermal detection device for detection by thermography of an installation space that accommodates the component.

12. The device of claim 11 , wherein the device further comprises at least one of a pyrometer for tracking the high-energy beam and an eddy current sensor for detecting a layer structure.

Assignees

• Satzger Wilhelm
• Sikorski Siegfried
• Dusel Karl Heinz
• Meir Wilhelm
• Kopperger Bertram
• Waermann Josef
• Jakimov Andreas
• Hertter Manuel
• Melzer Hans Christian
• Hess Thomas
• MTU Aero Engines AG

Inventors

• Satzger Wilhelm
• Sikorski Siegfried
• Dusel Karl-Heinz
• Meir Wilhelm
• Kopperger Bertram
• Waermann Josef
• Jakimov Andreas
• Hertter Manuel
• Melzer Hans-Christian
• Hess Thomas

Classifications

• B22F3/105 Primary

  by using electric current {other than for infrared radiant energy}, laser radiation or plasma (B22F3/11 takes precedence){; by ultrasonic bonding (B22F3/115 takes precedence)} · CPC title

• B29C64/153

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

• B29C64/393

  for controlling or regulating additive manufacturing processes · CPC title

• G01N25/72

  Investigating presence of flaws · CPC title

• B33Y30/00

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