公开(公告)号：US20220055307A1

公开(公告)日：2022-02-24

申请号：US17275373

申请日：2020-02-19

Applicant: Korea Electronics Technology Institute

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

IPC: B29C64/386 ,  B29C64/40 ,  B33Y50/00 ,  G05B19/4099

Abstract: Provided is a 3D printing slicing method for solving a quantization error problem. A 3D model slicing method according to an embodiment of the present invention comprises: receiving, as input, data of a 3D model to be three-dimensionally printed; calculating the height of the input 3D model; revising the height of the 3D model on the basis of a result of the calculation; and slicing the 3D model having the revised height. Accordingly, the present invention can easily and reliably solve a slicing quantization error problem even without changing the lamination thickness of a 3D printer.

公开(公告)号：US20210362426A1

公开(公告)日：2021-11-25

申请号：US17256880

申请日：2019-08-29

Applicant: Korea Electronics Technology Institute

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

IPC: B29C64/386 ,  B33Y50/00 ,  G06F30/10 ,  G06T7/12 ,  G06T17/10

Abstract: Provided is a method for creating a 2D slicing polyline based support structure for 3D printing. A method for creating a support structure according to an embodiment of die present invention comprises: slicing a 3D model into a plurality of 2D layers; comparing the 2D layers to calculate a support position for each of the 2D layers; and creating supports at the calculated positions. As a result, the supports can be created at precise and meaningful positions, a stable output is possible, and additional slicing work is not necessary on the created supports, whereby improvement of speed can be expected.

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.