Optimization of a production process

Patent metadata

Field	Value
Publication number	US-10456979-B2
Application number	US-201414787153-A
Country	US
Kind code	B2
Filing date	Apr 8, 2014
Priority date	Apr 26, 2013
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A method (1) for optimizing a production process for a component (20, 32) that is to be manufactured by additive manufacturing by means of simulation (2) of the production process (50) includes: a) ascertaining a position of the component (20, 32) in a production space that has been optimized according to a process optimization criterion (7); b) calculating displacements and/or stresses in the component (20, 32) that can be caused by the production process (50); c) ascertaining supporting structures (31) that counteract the displacements and/or stresses that have been optimized according to the process optimization criterion (7); and d) ascertaining at least a portion of the design of the component (20, 32) that has been optimized according to a component optimization criterion (8).

First claim

The invention claimed is:

1. A method for optimizing a production process for a component to be produced by additive manufacturing, by simulating the production process, wherein predetermined required properties of the component are specified as boundary conditions of the simulation, the method comprising:
determining a position of the component in a production space optimized based on a process optimization criterion, wherein the position of the component is automatically determined such that dislocations of the component due to gravitational forces are minimized;
computing dislocations of the component and stresses on the component caused by the production process, wherein the dislocations, the stresses, or the dislocations and the stresses caused by the production process are caused by gravitational forces, changes in density of a material to be used for production of the component, or gravitational forces and changes in density of the material to be used for production of the component, wherein computing dislocations of the component comprises calculating displacements or shifts of the component, and wherein computing stresses on the component comprises calculating temperature-related changes in density of the material to be used for production of the component;
determining supporting structures optimized based on the process optimization criterion, wherein the supporting structures counteract the dislocations, the stresses, or the dislocations and the stresses;
determining a portion of the design of the component optimized based on a component optimization criterion; and
producing the component via the production process based on the determined optimized position of the component in the production space and the determined optimized supporting structures.

2. The method of claim 1 , wherein an optimization with regard to the design of the component and of the production process of the component is carried out in a linked manner, jointly, simultaneously, or any combination thereof.

3. The method of claim 1 , wherein the determining of the position of the component, the computing, the determining of the supporting structures, the determining of the portion of the design of the component, or any combination thereof is carried out iteratively, in a linked manner, or iteratively and in a linked manner.

4. The method of claim 1 , wherein the component optimization criterion and the process optimization criterion are different.

5. The method of claim 1 , wherein the component optimization criterion and the process optimization criterion are weighted.

6. The method of claim 1 , wherein the component optimization criterion includes a functional design of the component, and the process optimization criterion includes a cost-effective design of the production process.

7. The method of claim 1 , further comprising adapting the design of the component to the process optimization criterion.

8. The method of claim 1 , wherein the process optimization criterion includes minimization of dislocations during the production process.

9. The method of claim 1 , wherein the process optimization criterion includes minimization of a mass of the supporting structures for a given maximum tolerance of the component to be produced.

10. The method of claim 1 , wherein the process optimization criterion includes minimization of deviations for a given maximum allowable mass of the supporting structures.

11. The method of claim 10 , wherein one of the boundary conditions includes that the supporting structures are producible only in defined partial areas.

12. The method of claim 1 , wherein the process optimization criterion includes minimization of the number of supporting structures.

13. The method of claim 1 , wherein the determining of the position of the component, the computing, the determining of the supporting structures, the determining of the portion of the design of the component, or any combination thereof is carried out for different designs of the component.

14. The method of claim 1 , further comprising determining a production process based on a determined optimized position of the component in the production space and the determined optimized supporting structures.

15. The method of claim 1 , wherein an instantaneous state of the component is detected by at least one sensor while carrying out the production process,
wherein the production process, based on the simulation, based on further simulations, or based on the simulation and on further simulations, is automatically adapted to the component optimization criterion, the process optimization criterion, or the component optimization criterion and the process optimization criterion depending on the detected state.

16. The method of claim 1 , further comprising automatically positioning and rotating the component mathematical optimization methods.

17. A non-transitory computer-readable medium encoded with executable instructions that, when executed, cause one or more data processing systems to optimize a production process for a component to be produced by additive manufacturing, by simulating the production process, wherein predetermined required properties of the component are specified as boundary conditions of the simulation, the executable instructions comprising:
determining a position of the component in a production space optimized based on a process optimization criterion, wherein the position of the component is automatically determined such that dislocations of the component due to gravitational forces are minimized;
computing dislocations of the component and stresses on the component caused by the production process, wherein the dislocations, the stresses, or the dislocations and the stresses caused by the production process are caused by gravitational forces, changes in density of a material to be used for production of the component, or gravitational forces and changes in density of the material to be used for production of the component, wherein computing dislocations of the component comprises calculating displacements or shifts of the component, and wherein computing stresses on the component comprises calculating temperature-related changes in density of the material to be used for production of the component;

determining supporting structures optimized based on the process optimization criterion, wherein the supporting structures counteract the dislocations, the stresses, or the dislocations and the stresses;
determining a portion of the design of the component optimized based on a component optimization criterion; and
producing the component via the production process based on the determined optimized position of the component in the production space and the determined optimized supporting structures.

18. The non-transitory computer-readable medium of claim 17 , wherein the non-transitory computer-readable medium is a non-transitory computer-readable medium of a 3D printer.

Assignees

• Siemens Ag

Inventors

• Hartmann Dirk
• Stelzig Philipp Emanuel
• Wever Utz
• Gersch Roland

Classifications

• G05B2219/49039

  Build layer of different, weaker material between support and prototype · CPC title

• G05B2219/49029

  Virtual rapid prototyping, create a virtual prototype, simulate rapid prototyping process · CPC title

• Y02P80/40

  Minimising material used in manufacturing processes · CPC title

• G05B2219/49038

  Support help, grid between support and prototype, separate easily · CPC title

• B29C64/386 Primary

  Data acquisition or data processing for additive manufacturing · CPC title