Method and apparatus for generating a work piece containing an information code

Patent metadata

Field	Value
Publication number	US-10093123-B2
Application number	US-201414553526-A
Country	US
Kind code	B2
Filing date	Nov 25, 2014
Priority date	Nov 25, 2013
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A method and an apparatus ( 10 ) for generating a three-dimensional work piece containing an information code are provided. The method comprises the steps of applying a raw material powder ( 18 ) onto a carrier ( 14 ) by means of a powder application device ( 16 ), irradiating electromagnetic or particle radiation ( 22 ) onto the raw material powder ( 18 ) applied onto the carrier ( 14 ) by means of an irradiation device ( 20 ), and controlling the operation of the powder application device ( 16 ) and the irradiation device ( 20 ) so as to generate an information code pattern ( 36 ) on or in the work piece ( 12 ), wherein the information code pattern ( 36 ) is defined by the microstructure ( 34 ) of the work piece ( 12 ).

First claim

The invention claimed is:

1. A method for generating a three-dimensional work piece, the method comprising the steps:
applying a raw material powder onto a carrier by means of a powder application device,
irradiating electromagnetic or particle radiation onto the raw material powder applied onto the carrier by means of an irradiation device,
controlling the operation of the powder application device and the irradiation device so as to generate an information code pattern on or in the work piece, wherein the information code pattern is defined by the microstructure of the work piece;
controlling the operation of the powder application device and the irradiation device so as to tailor the microstructure of the work piece such that a specific physically determinable microstructure parameter defining the microstructure is set in a first state or value and a second state or value based on the information code being represented by a first information code state or value and a second information code state or value, and
wherein the first state/value of the specific physically determinable microstructure parameter corresponds to the first information code state/value and the second state/value of the specific physically determinable microstructure parameter corresponds to the second information code state/value.

2. The method of claim 1 , further comprising the step:
controlling the operation of the powder application device and the irradiation device so as to tailor the microstructure of the work piece such that the first state/value of the specific physically determinable microstructure parameter on the one hand and the second state/value of the specific physically determinable microstructure parameter on the other hand are defined by
a first material composition or a first material distribution within the microstructure on the one hand and a second material composition or a second material distribution within the microstructure on the other hand,
a relatively coarse grain size on the one hand and a relatively fine grain size on the other hand,
a substantially directionally/dendritically solidified texture on the one hand and a substantially polycrystalline and/or substantially globulitic texture on the other hand,
an anisotropic texture on the one hand and an isotropic texture on the other hand, and/or
a first spatial direction of an anisotropic texture with respect to a build direction on the one hand and a second spatial direction of the anisotropic texture with respect to the build direction on the other hand,
or vice versa.

3. The method of claim 1 , further comprising the step:
controlling the operation of the powder application device and the irradiation device so as to tailor the microstructure of the work piece such that the first state/value of the specific physically determinable microstructure parameter on the one hand and the second state/value of the specific physically determinable microstructure parameter on the other hand are defined by
a first value of a mechanical property on the one hand and a second value of the mechanical property on the other hand,
a first value of an electrical property on the one hand and a second value of the electrical property on the other hand,
a first value of a thermal property on the one hand and a second value of the thermal property on the other hand,
a first value of a magnetic property on the one hand and a second value of the magnetic property on the other hand, and/or
a first value of a chemical property on the one hand and a second value of the chemical property on the other hand,
or vice versa.

4. The method of claim 1 , further comprising the step:
controlling the operation of the powder application device and the irradiation device so as to tailor the microstructure of the work piece such that the first state/value of the physically determinable microstructure parameter is located on or restricted to a first spatial portion of the work piece and the second state/value of the physically determinable microstructure parameter is located on or restricted to a second spatial portion of the work piece, wherein the first and second portions are spatially disjoint.

5. The method of claim 1 , further comprising the step:
controlling the operation of the powder application device and the irradiation device so as to tailor the microstructure of the work piece such that the information code pattern forms a two-dimensional matrix code.

6. The method of claim 5 , wherein the two-dimensional matrix code is a Quick Response Code.

7. The method of claim 1 , wherein the information code pattern is generated using an encoding scheme.

8. The method of claim 1 , wherein the information code pattern is a biunique mapping of the information code onto the microstructure of the work piece.

9. The method of claim 1 , wherein the information code pattern represents a production date, a production location, a production method, a production apparatus, a producer, a company, a production series, a serial number, an identification of the work piece, or a destination.

10. A method for generating a three-dimensional work piece, the method comprising the steps:
applying a raw material powder onto a carrier by means of a powder application device,
irradiating electromagnetic or particle radiation onto the raw material powder applied onto the carrier by means of an irradiation device,
controlling the operation of the powder application device and the irradiation device so as to generate an information code pattern on or in the work piece, wherein the information code pattern is defined by the microstructure of the work piece, and
controlling the operation of the powder application device and the irradiation device so as to tailor the microstructure of the work piece such that the information code pattern forms a linear barcode.

11. A method for generating a three-dimensional work piece, the method comprising the steps:
applying a raw material powder onto a carrier by means of a powder application device,
irradiating electromagnetic or particle radiation onto the raw material powder applied onto the carrier by means of an irradiation device,
controlling the operation of the powder application device and the irradiation device so as to generate an information code pattern on or in the work piece, wherein the information code pattern is defined by the microstructure of the work piece, and
controlling the operation of the powder application device and the irradiation device so as to tailor the microstructure of the work piece such that the microstructure of the work piece is defined by at least one of a size of grains, a grain morphology and a texture, wherein, in particular, the grain morphology and/or the texture of the microstructure is defined by at least one of a substantially directionally/dendritically solidified grain morphology, a substantially polycrystalline grain morphology, a substantially globulitic grain morphology, an anisotropic texture, an isotropic texture and a spatial direction of an anisotropic texture with respect to a build direction.

Assignees

• SLM Solutions Group AG

Inventors

• Schwarze Dieter
• Niendorf Thomas
• Schaper Mirko
• Brenne Florian
• Reschetnik Wadim
• Leuders Stefan
• Riemer Andre

Classifications

• Y10T428/12014

  having metal particles · CPC title

• G06K19/06084

  the marking being based on nanoparticles or microbeads · CPC title

• C22C2200/00

  Crystalline structure · CPC title

• B42D25/40

  Manufacture · CPC title

• G06K19/086

  with markings consisting of randomly placed or oriented elements, the randomness of the elements being useable for generating a unique identifying signature of the record carrier, e.g. randomly placed magnetic fibers or magnetic particles in the body of a credit card · CPC title