公开(公告)号：US20250045484A1

公开(公告)日：2025-02-06

申请号：US18720200

申请日：2022-12-14

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon SHIN ,  Jae Ho SHIN ,  Hye In LEE ,  Sung Hwan CHUN ,  Sung Hun PARK

IPC: G06F30/20 ,  B29C64/393 ,  B33Y50/02 ,  G06F113/10 ,  G06F119/08

Abstract: A support sink application method for 3D printing heat dissipation analysis is provided. The support sink application method according to an embodiment of the present invention comprises the steps in which: a support sink application system adds a support sink in order to simulate heat dissipation using a support in a state where a support shape is not generated in a 3D model; the support sink application system performs heat dissipation simulation with the support sink added to the 3D model; and the support sink application system adjusts the support sink on the basis of the result of the simulation. Therefore, the convenience of heat dissipation simulation can be improved by introducing the support sink capable of representing heat dissipation by the support with no support shape. In addition, due to dependency reduction caused by a support change, it is not necessary to reanalyze a target model (shape) even when a support is added/moved/deleted, and thus the convenience of heat dissipation simulation can be improved.

公开(公告)号：US20240256729A1

公开(公告)日：2024-08-01

申请号：US18565797

申请日：2022-05-25

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon SHIN ,  Sung Hwan CHUN ,  Hye In LEE ,  Jae Ho SHIN ,  Sung Hun PARK

IPC: G06F30/17

CPC classification number: G06F30/17

Abstract: Provided are a method and a system for determining a model output direction on the basis of heat dissipation characteristic analysis for stabilizing output of metal 3D printing. A method for determining a model output direction on the basis of heat dissipation characteristic analysis according to an embodiment of the present invention comprises: a shape characteristic parameter deriving step in which a model output direction determining system calculates model shape characteristic data according to the output direction of a model that changes in a metal 3D printing output process; a heat data change amount collecting step in which the model output direction determining system collects simulation results regarding residual heat data of the model every time the output direction changes; a heat data change amount analyzing step in which the model output direction determining system analyzes heat dissipation characteristics inside the model on the basis of the collected simulation results, thereby calculating heat flatness after heat dissipation with regard to each output direction; and an output direction determining step in which the model output direction determining system recommends output directions in descending order of heat flatness remaining in the model on the basis of the result of calculating heat flatness after heat dissipation with regard to each output direction in the heat data change amount analyzing step. Accordingly, the amount of remaining heat that changes depending on the output direction is measured through simulation, thereby analyzing heat dissipation characteristics of the model, and output directions appropriate for output stabilization are derived and are proposed to process workers, thereby contributing to output stabilization of metal 3D printing.

公开(公告)号：US20230415422A1

公开(公告)日：2023-12-28

申请号：US18038846

申请日：2021-11-03

Applicant: Korea Electronics Technology Institute

Inventor： Hye In LEE ,  Hwa Seon SHIN ,  Sung Hwan CHUN ,  Sung Hun PARK

IPC: B29C64/40 ,  B29C64/124 ,  B33Y10/00 ,  B29C64/386 ,  B33Y50/00

CPC classification number: B29C64/40 ,  B29C64/124 ,  B33Y10/00 ,  B29C64/386 ,  B33Y50/00

Abstract: Provided is a method for generating an auxiliary support for 3D printing output stability in bottom-up stacking manufacturing. The method for generating an auxiliary support, according to an embodiment of the present invention, comprises the steps of: slicing a 3D model into a plurality of 2D layers; calculating the position of an auxiliary support on the basis of the width of the sliced 2D layers; and generating an auxiliary support on the basis of the calculation result. Therefore, output stability can be increased by automatically generating the position and size of the auxiliary support so that the separation force of a stacked surface is uniform.

公开(公告)号：US20240253124A1

公开(公告)日：2024-08-01

申请号：US18565816

申请日：2022-05-25

Applicant: Korea Electronics Technology Institute

Inventor： Jae Ho SHIN ,  Hwa Seon SHIN ,  Hye In LEE ,  Sung Hwan CHUN ,  Sung Hun PARK

IPC: B22F10/366 ,  B22F10/80 ,  B33Y50/02 ,  G01N25/72

CPC classification number: B22F10/366 ,  B22F10/80 ,  G01N25/72 ,  B33Y50/02

Abstract: A thermal-analysis-based output stabilization method and system for improving 3D printing output reliability are provided. The thermal-analysis-based output stabilization method according to an embodiment of the present invention comprises steps in which: an output stabilization system performs first stacking thermal analysis on a plurality of residual heat quantity review specimens for which a process range corresponding to normal output quality is set; the output stabilization system performs second stacking thermal analysis on an actual stacked product on the basis of the first stacking thermal analysis result in the same manner as the first stacking thermal analysis method; and the output stabilization system performs stability review on the stacking result of the stacked product on the basis of the second stacking thermal analysis result.

公开(公告)号：US20230249257A1

公开(公告)日：2023-08-10

申请号：US17623146

申请日：2021-11-03

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon SHIN ,  Sung Hwan CHUN ,  Hye In LEE ,  Sung Hun PARK

IPC: B22F10/85 ,  B22F10/368 ,  B22F10/366 ,  B22F12/90 ,  B22F10/28

CPC classification number: B22F10/85 ,  B22F10/368 ,  B22F10/366 ,  B22F12/90 ,  B22F10/28

Abstract: Provided is a tool path optimization method for minimizing thermal unbalance in metal 3D printing. The tool path optimization method according to an embodiment of the present disclosure includes: a slicing step of generating stratum data by slicing a 3D model; a tool path data generation step of generating tool path data including a moving path of a tool which is moved inside a stratum, by applying equipment settings to the generated stratum data; a thermal data generation step of generating thermal data A of a first stratum and thermal data B1, B2, B3 of three lower layers of the first stratum, based on the tool path data; a thermal data analysis step of generating a thermal data contour by combining the thermal data A, B1, B2, B3; a thermal data application step of identifying an area where thermal unbalance is concentrated based on the thermal data contour, and setting an identification area D; and a tool path optimization step of optimizing a tool path for the identification area D. Accordingly, by correcting and regenerating a tool path to minimize thermal unbalance, based on thermal data which is a result of simulating thermal unbalance occurring when metal additive manufacturing is performed, costs incurred in current metal 3D printing manufacturing sites may be saved.

公开(公告)号：US20220262071A1

公开(公告)日：2022-08-18

申请号：US17623104

申请日：2020-11-10

Applicant: Korea Electronics Technology Institute

Inventor： Hye In LEE ,  Hwa Seon SHIN ,  Sung Hwan CHUN ,  Sung Hun PARK ,  Ji Min JANG

IPC: G06T17/20

Abstract: Provided is a method for generating a hollow structure of a 3D model on the basis of a 2D laminated cross-sectional outline to reduce the amount of using a material or the weight of a printed matter during laminating and manufacturing. The method for generating a hollow structure based on a 2D laminated cross-sectional outline, according to an embodiment of the present invention, comprises the steps of: slicing the 3D model; generating a hollow structure outline on the basis of the result of the slicing; detecting an overhang area between adjacent hollow structure outlines; recalculating the hollow structure outline according to the result of detecting the overhang area; and generating a hollow structure mesh on the basis of the recalculated hollow structure outline. Accordingly, because 2D laminated cross-sectional data is used, a hollow structure can be generated without separate data processing, thereby reducing a calculation burden. In addition, because the hollow structure is processed so that an overhang area is not generated when generating the hollow structure, a support is not needed therein, thereby making post-processing easy.

公开(公告)号：US20240100779A1

公开(公告)日：2024-03-28

申请号：US18038767

申请日：2021-11-03

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon SHIN ,  Sung Hun PARK ,  Hye In LEE ,  Sung Hwan CHUN

IPC: B29C64/393 ,  B33Y50/02 ,  G06T19/20

CPC classification number: B29C64/393 ,  B33Y50/02 ,  G06T19/20 ,  G06T2219/008 ,  G06T2219/2021

Abstract: Provided is a method for regenerating a tool path on the basis of output data feedback in order to improve 3D printing output reliability. A tool path regeneration system according to an embodiment of the present invention comprises: a slicing unit for configuring a process parameter for 3D printing and performing slicing for 3D model data on the basis of the configured process parameter to generate a job file; and an output unit for performing 3D printing on the basis of the generated job file and collecting output data that is output while the 3D printing is performed, wherein the slicing unit comprises an output data analysis module for performing monitoring on the basis of the output data received from the output unit and determining whether to correct the process parameter on the basis of the result of the monitoring. Thus, when a user recognizes or predicts an output error and output failure in an output step, the user can regenerate an output error alarm or a tool path on the basis of output data feedback generated in the output step without returning to a slicing step to regenerate a job file, whereby output reliability can be improved and a production time and a production cost can be reduced.

公开(公告)号：US20230256677A1

公开(公告)日：2023-08-17

申请号：US17623112

申请日：2021-11-03

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon SHIN ,  Hye In LEE ,  Sung Hwan CHUN ,  Sung Hun PARK

IPC: B29C64/393 ,  G06T19/20 ,  B33Y50/02

CPC classification number: B29C64/393 ,  G06T19/20 ,  B33Y50/02 ,  G06T2219/008

Abstract: Provided are a method and a system for solving a tolerance problem which may occur in a slicing quantization (staircase effect) process of 3D printing which slices a 3D model and laminates layers one by one. According to an embodiment of the present disclosure, a 3D model slicing method includes the steps of: receiving, by a 3D model slicing system, an input of data of a 3D model to 3D print; examining, by the 3D model slicing system, a dimension of a layer thickness of the inputted 3D model; correcting, by the 3D model slicing system, a size of a layer for slicing, based on a result of the examining; and slicing, by the 3D model slicing system, the corrected 3D model. Accordingly, by preserving a dimension within a layer thickness, a problem that a concavo-convex portion is lost in a slicing quantization process of 3D printing according to a slicing position within a layer thickness, and a tolerance occurs is solved.

公开(公告)号：US20220410574A1

公开(公告)日：2022-12-29

申请号：US17780117

申请日：2020-11-10

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon SHIN ,  Sung Hun PARK ,  Hye In LEE ,  Sung Hwan CHUN ,  Jin Min JANG

IPC: B41J2/165 ,  B41J2/21

Abstract: Provided is a nozzle clogging defect compensating method for compensating for a nozzle clogging defect appearing in a binder jetting stack manufacturing means. The nozzle clogging defect compensating method according to an embodiment of the present invention comprises the steps of: determining a defect occurrence region when a clogging defect of a nozzle used in the binder jetting stack manufacturing means occurs; determining whether compensation for the detect occurrence region is possible; when the compensation is possible, generating defect information and reflecting the defect information in an output code; setting a defect compensation region on the basis of the defect information; determining a defect compensation type of the defect compensation region; and reflecting a result of the determining in the output code. Accordingly, a replacement time and a replacement cost of an output head where the nozzle clogging defect has occurred can be saved, thereby reducing the unit production cost of a binder jetting type stack manufacturing output.

公开(公告)号：US20210252787A1

公开(公告)日：2021-08-19

申请号：US17256849

申请日：2020-02-20

Applicant: Korea Electronics Technology Institute

Inventor： Hwa Seon SHIN ,  Hye In LEE ,  Sung Hwan CHUN ,  Ji Min JANG ,  Sung Hun PARK

IPC: B29C64/386 ,  B29C64/40 ,  G06T17/20 ,  B33Y50/02

Abstract: A method for producing a support structure of a 3D model for 3D printing is provided. A method for producing a support according to an embodiment of the present invention comprises the steps of: dividing a surface constituting a 3D model into multiple surface patches; classifying respective divided surface patches according to geometric characteristics; and producing supports corresponding to the classified characteristics with regard to respective surface patches. Accordingly, during metal laminate manufacturing, the output stability may be improved while reducing the support producing process time. In addition, the surfaces may be expressed by different colors according to the result of geometric characteristic classification, and the supports may also be expressed by different colors according to the type, thereby playing the role of guide lines such that the user can recognize the shape of the surfaces and the type of supports to be installed on the corresponding surfaces. Moreover, the size of a support tip is determined in view of the thickness of the area in which a support is to be produced, thereby preventing the problem of output quality degradation which would otherwise occur because the support cannot move upwards through an output part.