Method for assessing the structural quality of three-dimensional components

Patent metadata

Field	Value
Publication number	US-10722985-B2
Application number	US-201414764497-A
Country	US
Kind code	B2
Filing date	Jan 29, 2014
Priority date	Mar 8, 2013
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

A method for assessing the structural quality of three-dimensional components which are produced by laser sintering or laser melting. The component is produced by the successive solidification of individual layers of a construction material solidified by the action of radiation, by sintering or fusing the construction material. The fusion region is captured by a sensor device and sensor values for evaluating the quality of the component are derived therefrom. The sensor values with the co-ordinate values which localize the sensor values in the component are stored with a division of the calculated sensor values into values which are critical to the structural quality of the component and non-critical values to said quality and with a representation of those values critical to the structural quality of the component as to their distance from a reference point lying or arranged in the region of the surface.

First claim

What is claimed is:

1. A method of assessing a structural quality of a three-dimensional component produced by sintering or fusing a powdered construction material using an additive manufacturing process, the method comprising:
localizing a sensor value to coordinate values of an internal location within a three-dimensional component in relation to a reference point of the component, the sensor value indicating a structural quality of the component; and
outputting instructions configured for guiding an article of examination equipment to move in proximity to an investigation location on a surface of the component in relation to the reference point, the investigation location corresponding to the coordinate values of the internal location within the component to which the sensor value has been localized.

2. The method of claim 1 , wherein the sensor value comprises or is based at least in part on information from a sensor device configured to monitor a melt area created by a punctiform or linear application of energy for sintering or fusing the powdered construction material.

3. The method of claim 1 , comprising:
classifying the sensor value as being a critical sensor value based at least in part on the sensor value being indicative of a structural fault, a temperature deviation when sintering or fusing a powdered construction material, and/or an imperfection in a coating of powdered construction material to be sintered or fused.

4. The method of claim 1 , comprising:
classifying the sensor value as being a critical sensor value based at least in part on the sensor value corresponding to a load-critical area of the component.

5. The method of claim 1 , comprising:
providing for display on a visualization device, a representation comprising the sensor value localized to coordinate values of the internal location within the three-dimensional component in relation to the reference point of the component, the representation comprising a two-dimensional or multi-dimensional representation of the component, wherein the representation is configured for guiding the article of examination equipment to move in proximity to the investigation location on the surface of the component in relation to the reference point.

6. The method of claim 5 , wherein representation comprises an indication of a distance between the reference point of the component and the coordinate values corresponding to the sensor value.

7. The method of claim 6 , wherein the indication of the distance between the reference point of the component and the coordinate values corresponding to the sensor value comprises a representation of a measured distance line.

8. The method of claim 5 , wherein the representation comprises a potential yield lines and the sensor value displayed with reference to the potential yield line.

9. The method of claim 1 , wherein the reference point of the component comprises a defined point corresponding to a clamping lug or a clamping recess of the component.

10. The method of claim 1 , wherein the article of examination equipment comprises a cutting device, a drilling device, or a breaking device, the examination equipment configured to prepare at least a portion of the component to be tested for a fracture.

11. The method of claim 1 , comprising:
localizing a sensor value comprises localizing a plurality of sensor values to respective coordinate values of an internal location within the three-dimensional component in relation to the reference point of the component, the plurality of sensor values indicating a structural quality of the component corresponding to the respective coordinate values; and
outputting instructions configured for guiding an article of examination equipment to move in proximity to an investigation location on a surface of the component in relation to the reference point, the investigation location corresponding to the coordinate values of the internal location within the component to which a one or more sensor values selected from among the plurality of sensor values has been localized.

12. The method of claim 11 , comprising:
providing for display on the visualization device, a representation comprising the plurality of sensor value localized to respective coordinate values of the internal location within the three-dimensional component in relation to the reference point of the component, the representation comprising a two-dimensional or multi-dimensional representation of the component, wherein the representation is configured for guiding the article of examination equipment to move in proximity to the investigation location on the surface of the component in relation to the reference point.

13. The method of claim 11 , wherein the one or more sensor values selected from among the plurality of sensor values correspond to a load-critical area of the component, the component comprising the load critical area and at least one load-noncritical area.

14. The method of claim 13 , wherein the one or more sensor values selected from among the plurality of sensor values comprise a plurality of sensor values clustered in close proximity to one another and corresponding to the load-critical area of the component, and wherein the investigation location corresponds to a plurality of sensor values.

15. The method of claim 11 , comprising:
classifying at least some of the plurality of sensor values as being a critical sensor value based at least in part on (i) the respective sensor value being indicative of a structural fault, a temperature deviation when sintering or fusing a powdered construction material, and/or an imperfection in a coating of powdered construction material to be sintered or fused; and/or (ii) the respective sensor value corresponding to a load-critical area of the component.

16. The method of claim 15 , comprising:
determining a degree of fracture risk associated with the at least some of the plurality of sensor values, the risk of fracture determined based at least in part on a degree of clustering among the at least some of the plurality of sensor values having been classified as a critical sensor value.

17. The method of claim 16 , wherein the degree of fracture risk depends at least in part on the degree of clustering in proximity to a potential yield line.

18. The method of claim 17 , comprising:
classifying the degree of fracture risk in relation to a fracture risk scale, the fracture risk scale based at least in part on the quantity of critical sensor values and/or the respective distance of the critical sensor values from a potential yield line.

19. The method of claim 18 , comprising:
classifying the degree of fracture risk in relation to a fracture risk scale for a plurality of locations of the component; and
selecting the investigation location based at least in part on the degree of fracture risk, the investigation location corresponding to a location, selected from among the plurality of locations, having a relatively greater degree of fracture risk.

Assignees

• Cl Schutzrechtsverwaltungs Gmbh
• Concept Laser Gmbh

Inventors

• Herzog Frank

Classifications

• B22F12/90

  Means for process control, e.g. cameras or sensors · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B33Y50/00

  Data acquisition or data processing for additive manufacturing · CPC title

• B22F10/80

  Data acquisition or data processing · CPC title

• B33Y40/00

  Auxiliary operations or equipment, e.g. for material handling · CPC title