WO2021080581A1 - Alignement d'une cible avec une caméra thermique dans une imprimante 3d - Google Patents

Alignement d'une cible avec une caméra thermique dans une imprimante 3d Download PDF

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Publication number
WO2021080581A1
WO2021080581A1 PCT/US2019/057658 US2019057658W WO2021080581A1 WO 2021080581 A1 WO2021080581 A1 WO 2021080581A1 US 2019057658 W US2019057658 W US 2019057658W WO 2021080581 A1 WO2021080581 A1 WO 2021080581A1
Authority
WO
WIPO (PCT)
Prior art keywords
target object
build material
pixel
location
material layer
Prior art date
Application number
PCT/US2019/057658
Other languages
English (en)
Inventor
Arthur H Barnes
Josh M HUNSAKER
Todd Goyen
Original Assignee
Hewlett-Packard Development Company, L.P.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett-Packard Development Company, L.P. filed Critical Hewlett-Packard Development Company, L.P.
Priority to PCT/US2019/057658 priority Critical patent/WO2021080581A1/fr
Publication of WO2021080581A1 publication Critical patent/WO2021080581A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/31—Calibration of process steps or apparatus settings, e.g. before or during manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/10—Formation of a green body
    • B22F10/14—Formation of a green body by jetting of binder onto a bed of metal powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/90—Means for process control, e.g. cameras or sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • FIG. 1 shows a block diagram of a side view of an example 3D printer suitable for implementing example methods of aligning a printed target object with a thermal camera;
  • FIGs. 4a and 4b show a blown up or expanded area of the example pixel grid shown in FIG. 3;
  • FIGs. 5, 6a, 6b, and 7, show flow diagrams of example methods of aligning a target object with a thermal camera in a 3D printer.
  • 3D objects can be formed from layers of build material.
  • build materials include plastics, metals, and ceramic materials that can be used in different forms such as powders, fibers, and so on.
  • portions of each material layer are combined with portions of a subsequent layer until a 3D object is fully formed.
  • a liquid agent such as a fusing agent can be printed or deposited onto portions of each material layer and heat can be applied to facilitate the solidification of the printed build material.
  • One of the challenges in some additive manufacturing processes is controlling the amount of energy delivered during a fusing or heating process.
  • the fusing energy applied during a fusing process can be controlled so that object layers are maintained at target temperatures.
  • the quality of 3D objects can be reduced and/or can vary when the target temperatures are not maintained. Temperatures that differ by as little as 0.5°C from target temperatures can result in visible defects in 3D objects.
  • the ability to accurately control the fusing energy can depend on temperature feedback information acquired from a target pseudo/sacrificial object.
  • a target object can be formed, for example, outside of an object build area and within an area such as a border area at the side of the object build area.
  • the area of the build layer 115 viewed by each pixel is the area from which each pixel will measure temperature on the layer 115.
  • the pixel grid 126 is skewed (i.e., not rectangular in shape).
  • the pixel grid 126 shown in FIG. 3 is intended as an example to help illustrate how the viewing angle of the thermal camera 118 can cause the pixel grid of the camera to be skewed, and how the pixels 128 in the skewed grid 126 can take on different sizes and shapes. It is to be understood that a true pixel grid can comprise many more pixels than are shown in the skewed pixel grid 126 of FIG. 3.
  • the location of the target object 122 can be adjusted again, moving the target object 122 in the same direction as the previous move, to try and bring the hottest center portion of the target object 122 closer to alignment with the hottest pixel.
  • the location of the target object 122 can be adjusted again, moving the target object 122 in a different direction as the previous move, to try and bring the hottest center portion of the target object 122 closer to alignment with the hottest pixel.
  • a controller 124 generally represents processing and non-transitory memory resources, programming, electronic circuitry, and other components for controlling various functions of the example 3D printer 100, including spreading build material layers onto the build platform 102, selectively delivering liquid agents onto areas of build material layers, applying thermal energy to build material layers, moving the build platform 102, and so on.
  • the controller 124 can execute programming instructions to perform the various operations of a 3D printer, such as the operations of example methods 500, 600, and 700, discussed below with regard to FIGs. 5, 6a, 6b, and 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Analytical Chemistry (AREA)

Abstract

Dans un exemple de mise en oeuvre, un procédé d'alignement d'un objet cible avec une caméra thermique dans une imprimante 3D comprend la formation d'une pluralité de couches de matériau de construction sur une plateforme de construction, la formation d'un objet cible sur chaque couche de matériau de construction et l'ajustement d'un emplacement de l'objet cible sur chaque couche de matériau de construction. Le procédé comprend l'acquisition d'une image thermique de l'objet cible à partir de chaque couche de matériau de construction, l'identification d'un pixel le plus chaud à partir des images thermiques et le suivi de la température du pixel le plus chaud lors de l'ajustement de l'emplacement de l'objet cible pour chaque couche de matériau de construction et, lorsque le pixel le plus chaud atteint une température maximale, la détermination du fait que l'objet cible est aligné avec la caméra thermique.
PCT/US2019/057658 2019-10-23 2019-10-23 Alignement d'une cible avec une caméra thermique dans une imprimante 3d WO2021080581A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2019/057658 WO2021080581A1 (fr) 2019-10-23 2019-10-23 Alignement d'une cible avec une caméra thermique dans une imprimante 3d

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2019/057658 WO2021080581A1 (fr) 2019-10-23 2019-10-23 Alignement d'une cible avec une caméra thermique dans une imprimante 3d

Publications (1)

Publication Number Publication Date
WO2021080581A1 true WO2021080581A1 (fr) 2021-04-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2019/057658 WO2021080581A1 (fr) 2019-10-23 2019-10-23 Alignement d'une cible avec une caméra thermique dans une imprimante 3d

Country Status (1)

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WO (1) WO2021080581A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6036777A (en) * 1989-12-08 2000-03-14 Massachusetts Institute Of Technology Powder dispensing apparatus using vibration
US20160221264A1 (en) * 2015-02-02 2016-08-04 United Technologies Corporation Method and system for providing thermal support in an additive manufacturing process
WO2016195665A1 (fr) * 2015-06-02 2016-12-08 Hewlett-Packard Development Company, L.P. Objets sacrificiels sur la base d'un seuil de température
WO2019083531A1 (fr) * 2017-10-25 2019-05-02 Hewlett-Packard Development Company, L.P. Supports thermiques pour éléments 3d formés à partir de particules

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6036777A (en) * 1989-12-08 2000-03-14 Massachusetts Institute Of Technology Powder dispensing apparatus using vibration
US20160221264A1 (en) * 2015-02-02 2016-08-04 United Technologies Corporation Method and system for providing thermal support in an additive manufacturing process
WO2016195665A1 (fr) * 2015-06-02 2016-12-08 Hewlett-Packard Development Company, L.P. Objets sacrificiels sur la base d'un seuil de température
WO2019083531A1 (fr) * 2017-10-25 2019-05-02 Hewlett-Packard Development Company, L.P. Supports thermiques pour éléments 3d formés à partir de particules

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