WO2020130178A1 - Système de traitement destiné à un produit fritté par imprimante 3d à l'aide d'un robot à articulations multiaxiales - Google Patents

Système de traitement destiné à un produit fritté par imprimante 3d à l'aide d'un robot à articulations multiaxiales Download PDF

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Publication number
WO2020130178A1
WO2020130178A1 PCT/KR2018/016193 KR2018016193W WO2020130178A1 WO 2020130178 A1 WO2020130178 A1 WO 2020130178A1 KR 2018016193 W KR2018016193 W KR 2018016193W WO 2020130178 A1 WO2020130178 A1 WO 2020130178A1
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WO
WIPO (PCT)
Prior art keywords
joint robot
laser
powder
axis joint
printer
Prior art date
Application number
PCT/KR2018/016193
Other languages
English (en)
Korean (ko)
Inventor
이동근
백병철
정구상
Original Assignee
원광이엔텍 주식회사
(주)컨셉션
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
Priority claimed from KR1020180164195A external-priority patent/KR102193163B1/ko
Priority claimed from KR1020180164193A external-priority patent/KR102271074B1/ko
Priority claimed from KR1020180164194A external-priority patent/KR20200080398A/ko
Application filed by 원광이엔텍 주식회사, (주)컨셉션 filed Critical 원광이엔텍 주식회사
Publication of WO2020130178A1 publication Critical patent/WO2020130178A1/fr

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    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • 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

  • the present invention is a processing system for improving the surface accuracy of the surface of a 3D printed product that is sintered in the process of irradiating a laser on a powder supplied to a 3d printer using a device in which a multi-axis joint robot is added on a galvanon scanner. It is about.
  • Metal 3D printers are generally divided into PBF (Powder Bed Fusion) method and DED (Directed Energy Deposition) method.
  • PBF is a method in which powder is used as a material to lay the powder flat on a powder bed and sintered or melted by selectively irradiating a high-energy laser or electron beam to deposit it.
  • the laser uses a galvano scanner to control the laser path, and a deflecting lens composed of coils moves the electron beam.
  • the main advantage of the PBF method is that it can print complex shapes without difficulty. For example, it is advantageous for processing difficult-to-cut materials or for producing high-value products with complex shapes.
  • the precision is excellent, there is a disadvantage in that the productivity is low and the sintering and melting uniformity of the laminated product is poor, so the strength of the product is weak and it is difficult to secure an impact value.
  • SLM Selective Laser Melting
  • molten paper is instantaneously generated, and metal powder is also supplied to deposit in real time. It can be stacked on top of existing products in a similar way to welding, which can be used for maintenance work. In addition, it is possible to manufacture alloys in real time by using several powders at the same time or to use different materials.
  • 3D printing products using metal have limited mechanical processing due to their properties, making it difficult to control the surface roughness, and in the case of products requiring low surface roughness, post-treatment is essential.
  • 3D printing technology using metal and laser has a low shape accuracy of about 30 ⁇ 100 ⁇ m, so it is limited to be applied as a medical product, so the surface accuracy is improved through separate post-processing technologies including polishing, sanding, polishing or CNC processing. The raising process is necessary.
  • the metal powder-containing raw material is used as a feed material for 3D printing, so that a metal product requiring high precision and high precision can be manufactured by 3D printing technology.
  • Disclosed is a three-dimensional printing method using a metal powder-containing composition as a raw material, and in the case of Korean Patent Publication No.
  • Japanese Patent Publication No. 2009-001900 discloses a powder formed of a metal powder material.
  • a method of manufacturing a three-dimensional shape structure in which a plurality of sintered layers are integrally stacked by irradiating a layer with a light beam to form a sintered layer and repeating it is described.
  • Patent Document 1 KR10-1806252 B
  • Patent Document 2 KR10-2018-0021518 A
  • Patent Document 3 JP2009-001900 A
  • the present invention has been devised to solve various problems as described above, and the multi-axis joint robot structure on the galvanone scanner in the process of irradiating a laser using a galvanon scanner on powder supplied on a 3D printer It is an object of the present invention to provide a processing method for improving the surface precision by enabling laser sintering of various angles on the surface of the 3D printed product to be sintered.
  • the high-viscosity liquid polymer material supplied on the 3D printer is sprayed using an inkjet printing head, laminated to a 3D laser sintered state, and then fed again to supply a powder to the galvanone scanning system with a multi-joint robot structure. It is an object to provide a processing method for advancing sintering.
  • the laser is irradiated with powder supplied using a galvanon scanning system to grid the shape of the support connected to the lower portion of the artificial joint product that is sintered. It is an object to provide a method of improving the surface precision of a sintered artificial joint product by changing to a mesh structure.
  • the hybrid printing system for laminating the high-viscosity liquid material sequentially applies the high-viscosity liquid material supplied from the liquid material supply unit onto the work plate of the product molding chamber.
  • Laser sintering is performed by using the laser irradiation unit in a state in which the materials are supplied and stacked by spraying using the inkjet printing mechanism.
  • the hybrid printing system further includes a multi-axis joint robot unit enabling the angle change of the laser irradiation unit, and the laser irradiation unit is fixed on the end of the multi-axis joint robot, and a plurality of joints constituting the multi-axis joint robot And by changing the position and angle of the plurality of axes connecting the joints, it is possible to improve the surface precision by enabling laser sintering of various angles on the high-viscosity liquid polymer material laminated on the 3D molded product surface.
  • the laser irradiation unit is a galvanon scanner.
  • the present invention has the following effects.
  • the present invention is to supply and stack the high-viscosity liquid polymer material supplied on the 3D printer by the spraying method using an inkjet printing head, to stack the existing material for the efficient lamination processing of high-viscosity particles having 100,000 cps or more without additional processing. It is characterized by being utilized as a printing material.
  • the present invention provides a hybrid system in which injection technology is fused while using a laser sintering technology using a galvanon scanning system.
  • a multi-joint robotic structure is added to the galvanon scanning system to perform laser sintering at various angles on the surface of the sintered product. It is possible to improve the surface precision.
  • the present invention enables precise laser processing regardless of whether the inclination angle of the sintered product surface is steep or gentle inclination by using a multi-axis joint robot.
  • a lamination and sintering process in the process of producing a medical prosthesis such as an artificial joint using a galvanone scanning system on the supplied powder, a lamination and sintering process must be performed while a support is placed under the artificial joint, and the shape of the support And by setting the structure in a lattice or mesh form, the surface quality degradation caused by removing the support directly contacting the artificial joint product is minimized.
  • FIG. 1 is a conceptual diagram showing a processing system for a surface of a 3D printer sintered product using a multi-axis joint robot according to an embodiment of the present invention.
  • FIG 3 is a conceptual view showing a hybrid processing system for laminating a high-viscosity liquid material according to another embodiment of the present invention.
  • FIG. 4 shows a concept of producing a 3D printer sintered product by irradiating a laser mounted on a multi-joint robot on a powder supplied on a support constituting a lower portion of a medical implant.
  • the present invention is a process to improve the surface precision of the surface of a 3D printed product that is sintered in the process of irradiating a laser onto a powder supplied on a 3d printer using an apparatus having a multi-joint robot structure on a galvanon scanner. Provides a method.
  • the high-viscosity liquid material supplied from the liquid material supply unit further includes an inkjet printing mechanism 400 for sequentially laminating on the work plate of the product molding part.
  • the product forming unit 200 allows the sintering process to be performed in a pattern shape corresponding to a cross-sectional shape of a desired product through laser exposure.
  • the product molding unit 200 is a powder supplied through the powder supply unit through a process of moving downward in accordance with a predetermined program in the product molding chamber 210 and the product molding chamber 210 in which the supplied powder is sintered.
  • the product molding chamber 210 means a space in which powder supplied from the powder supply unit is molded into a product having a desired shape under a sintered state by a laser, and is transported separately from the top of the powder receiving chamber constituting the powder supply unit. It may be a structure connected through a plate. As an example, the transfer plate may have a shape inclined downward from the powder receiving chamber toward the product forming chamber.
  • the working plate 220 functions as a powder bed in which the supplied powder is uniformly spread, and can be moved up and down through a driving unit 225 coupled to the lower portion.
  • the driving unit 225 has one end fixed to the lower portion of the working plate 220, and the other end of the product forming chamber 210, an elevating rod (not shown) extending downwardly, and a driving motor for moving the elevating rod up and down ( It is possible to guide the movement of the work plate 220 while lifting up and down together with the lifting rod in a state where at least one guide (not shown) is disposed around the lifting rod.
  • a certain amount of powder supplied from the powder supply unit 100 is collected on one side of the working plate 220, a certain amount of powder supplied through the distribution roller can be spread on a working plate 220 with a uniform thickness.
  • the dispensing roller may perform a function of transferring powder in a rotating process, and at the same time, perform a process of compacting the powder passing to the lower portion of the work plate and the dispensing roller through a rolling motion.
  • a vibrating body capable of applying vibration on the distribution roller by additionally placing a vibrating body capable of applying vibration on the distribution roller, a predetermined vibration pressure can be applied to the powder placed on the working plate 220 through the process of applying vibration on the distribution roller.
  • the cylindrical distribution roller is coupled along the axial direction to the roller connecting shaft coupled in a direction orthogonal to the rotation axis disposed on the upper center of the working plate.
  • the rotating shaft is rotatably coupled through a separate driving means operated by a control unit in a vertically coupled state on one upper end of the product molding chamber 210.
  • the distribution roller rotates within a certain angular range on the work plate 220 according to the rotation of the rotation axis. Specifically, when the powder is supplied on one side of the product forming chamber 210, the dispensing roller moves similarly to the unfolding operation of the fan from one side to the other side, such as a wiper of an automobile, around a rotation axis.
  • the laser irradiation unit 230 includes a laser light source disposed on the top of the product molding chamber 210 and a lens unit to which light irradiated from the laser light source is incident and refracted.
  • the inkjet printing mechanism 400 sequentially stacks the high-viscosity polymer liquid material supplied from the liquid material supply unit through the inkjet printing head 410 onto the work plate of the product molding unit. This makes it possible to improve the existing problem of the fact that in the case of the conventional powder supply method, it is impossible to perform uniform layer thickness control for each layer.
  • the cooling and curing process of the liquid material supplied through the separate blowing unit 420 is supported. Meanwhile, a separate heating means is provided on the working plate to support the sintering process.
  • the multi-joint robot structure 300 has a structure having a multi-joint link and a structure having a plurality of axes forming a connection point of the multi-joint link, and includes a path including position, speed, and acceleration information of each axis constituting the robot structure through the motion control unit. You make a plan and give orders.
  • the multi-joint robot structure used in the present invention includes an orthogonal robot in which all joints are linear, a cylindrical robot having two linear motion joints and one rotating joint, a spherical robot having two rotating joints and one linear joint, and three. It is possible to use any one type of a connected robot having a rotational joint, or to use two or more of the plurality of robot types in combination.
  • Powder is sequentially supplied onto the working plate 220 of the product molding chamber 210 to form a support 250 constituting the lower portion of the medical implant.
  • Powder is sequentially supplied from the powder supply unit 100 onto the working plate of the product molding chamber.
  • the dispense roller is operated to compact the powder supplied on the work plate 220 to a certain thickness.
  • 3D molded product surface processing is performed by sintering using a laser irradiated from the laser irradiation unit 240 on a powder layer stacked on a predetermined thickness on the support. .
  • the laser irradiation unit 240 is fixed on the end of the multi-axis joint robot 300, through a plurality of joints constituting the multi-axis joint robot and the position and angle of the plurality of axes connecting the joints, the 3D It enables laser sintering at various angles to the powder layer laminated on the surface of the molded product, thereby improving the surface precision.
  • the support is formed in a lattice to mesh structure.
  • the inkjet printing mechanism 400 sequentially stacks the high-viscosity liquid material supplied from the liquid material supply unit onto the working plate of the product molding chamber.
  • the laser irradiation unit primarily sinters the high-viscosity liquid material placed on the working plate while being fixed on the end of the multi-joint robot structure.
  • Powder is sequentially supplied from the powder supply section onto the working plate of the product molding chamber.
  • the distribution roller may be operated to compact the powder supplied on the working plate to a certain thickness.
  • the surface of the 3D molded product is subjected to surface sintering by secondary sintering using a laser irradiated from a laser irradiator on a powder layer stacked to a predetermined thickness on the work plate.
  • the laser irradiation unit is fixed on the end of the multi-joint robot structure, through changing the position and angle of a plurality of joints constituting the multi-joint robot structure and the plurality of axes connecting the joints, the surface of the 3D molded product placed on the working plate It enables laser sintering at various angles to the powder layer laminated on the surface, thereby improving the surface precision.
  • the lamination angle between the powder layers placed on the working plate is diversified through a process of freely adjusting the placement angle of the laser irradiation part galvanon scanner using the multi-joint robot structure.
  • the 3D output to be molded may have a surface having a steep slope or a surface having a gentle slope, wherein the roughness of the slope can be smoothed by properly maintaining the angle of the galvanone scanner according to the slope formed in the 3D output. .
  • a process of laminating a high-viscosity liquid material and performing sintering using an inkjet printing mechanism may be omitted.
  • the present invention is to supply and stack the high-viscosity liquid polymer material supplied on the 3D printer by an injection method using an inkjet printing head to separate the existing material for efficient lamination processing of high-viscosity particles having 100,000 cps or more. It is used as a lamination or printing material without a process of processing and fuses spraying technology in a state where laser sintering technology is utilized using a galvanon scanning system.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)

Abstract

L'invention concerne un système de traitement laser 3D destiné à traiter la surface d'un produit fritté par une imprimante 3D à l'aide d'un robot à articulations multiaxiales, ledit système servant à traiter une surface d'un produit moulé en 3D moulé par fourniture séquentielle de poudre par une unité d'alimentation en poudre sur une plaque de travail dans une chambre de moulage de produit, puis à fritter une couche de poudre empilée sur la plaque de travail d'une épaisseur prédéfinie, à l'aide d'un laser émis par une unité d'émission laser sur la couche de poudre. L'unité d'émission laser permet un frittage laser à divers angles par rapport à une couche de poudre empilée sur la surface du produit moulé en 3D par modification des positions et des angles d'une pluralité d'articulations du robot à articulations multiaxiales et d'une pluralité d'arbres qui relient les articulations dans l'état dans lequel l'unité d'émission laser est fixée sur une extrémité du robot à articulations multiaxiales.
PCT/KR2018/016193 2018-12-18 2018-12-19 Système de traitement destiné à un produit fritté par imprimante 3d à l'aide d'un robot à articulations multiaxiales WO2020130178A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2018-0164194 2018-12-18
KR1020180164195A KR102193163B1 (ko) 2018-12-18 2018-12-18 고점도 액상 소재를 적층 가공하기 위한 하이브리드 프린팅 시스템
KR1020180164193A KR102271074B1 (ko) 2018-12-18 2018-12-18 다축 관절 로봇을 이용한 3d 프린터 소결 제품의 표면에 대한 가공 시스템
KR1020180164194A KR20200080398A (ko) 2018-12-18 2018-12-18 다축 관절 로봇을 이용하여 의료용 보형물의 하부를 구성하는 지지체의 형상을 격자 내지 메쉬 구조로 형성하는 방법
KR10-2018-0164195 2018-12-18
KR10-2018-0164193 2018-12-18

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WO2020130178A1 true WO2020130178A1 (fr) 2020-06-25

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PCT/KR2018/016193 WO2020130178A1 (fr) 2018-12-18 2018-12-19 Système de traitement destiné à un produit fritté par imprimante 3d à l'aide d'un robot à articulations multiaxiales

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WO (1) WO2020130178A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000280356A (ja) * 1999-03-29 2000-10-10 Minolta Co Ltd 三次元造形装置および三次元造形方法
US20070126157A1 (en) * 2005-12-02 2007-06-07 Z Corporation Apparatus and methods for removing printed articles from a 3-D printer
KR20150115598A (ko) * 2014-04-04 2015-10-14 가부시키가이샤 마쓰우라 기카이 세이사쿠쇼 3차원 조형 장치 및 3차원 형상 조형물의 제조 방법
JP2016065284A (ja) * 2014-09-25 2016-04-28 セイコーエプソン株式会社 ３次元形成装置および３次元形成方法
US20180117836A1 (en) * 2016-06-01 2018-05-03 Arevo, Inc. Localized heating to improve interlayer bonding in 3d printing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000280356A (ja) * 1999-03-29 2000-10-10 Minolta Co Ltd 三次元造形装置および三次元造形方法
US20070126157A1 (en) * 2005-12-02 2007-06-07 Z Corporation Apparatus and methods for removing printed articles from a 3-D printer
KR20150115598A (ko) * 2014-04-04 2015-10-14 가부시키가이샤 마쓰우라 기카이 세이사쿠쇼 3차원 조형 장치 및 3차원 형상 조형물의 제조 방법
JP2016065284A (ja) * 2014-09-25 2016-04-28 セイコーエプソン株式会社 ３次元形成装置および３次元形成方法
US20180117836A1 (en) * 2016-06-01 2018-05-03 Arevo, Inc. Localized heating to improve interlayer bonding in 3d printing

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