3D printing technology was developed in the early 1990s, and continues to grow to the present day. Globally, 3D printing technology developed as processing technology, but now progresses to various application technologies. Korea had an initial interest in overseas 3D printing technology, but the first prototype industries were limited. Recently, 3D printing technology has been attracting attention as a future technology, and the interest of people and research have been greatly increased. In Korea, it is known that many researches related to 3D printing are performed recently. However, it is true that research on the quantitative counting of specific research fields and analysis has not been sufficiently reviewed. Therefore, this paper introduces study results to understand trends of 3D printing research in Korea and to extract the mainstream fields, focusing on the articles published in Korean journals. This paper shows various indexes, such as the number of papers per year, as well as research fields and tendency of increases and decreases calculated and introduced with this topic.
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A Study on the Wear Phenomena of PLA and PETG Materials for 3D Printing in Non-lubricated Condition Yonsang Cho, Hyunseop Lee Journal of the Korean Society for Precision Engineering.2024; 41(2): 145. CrossRef
Study on Mechanical Properties of MWCNT Reinforced Photocurable Urethane Acrylate for Additive Manufacturing Hyunjun Jo, Bum-Joo Lee Journal of the Korean Society for Precision Engineering.2024; 41(3): 199. CrossRef
Mechanical Property Test Results for Additive Manufactured Specimens of Stainless Steel 316 L after Heat Treatment Kyungnam Jang, Seunghan Yang, Dae Seung Park Journal of the Korean Society for Precision Engineering.2024; 41(7): 551. CrossRef
Dimensional Characteristics of Hydraulic Actuator Curve based on 3D Printing Filament Materials Myung-Hwi Jung, Jeong-Ri Kong, Hae-Ji Kim Journal of the Korean Society of Manufacturing Process Engineers.2021; 20(1): 74. CrossRef
Feasibility Study on Dimensional Standard for Material Extrusion Type 3D Printed Structures Sunghoon Eom, Jungjae Park, Jonghan Jin, Yong Son Journal of the Korean Society for Precision Engineering.2020; 37(4): 241. CrossRef
Study on Output Characteristics of Printed Flexible Tactile Sensors Connected to Brass Terminals Jindong Kim, Yonghwan Bae, Inhwan Lee, Hochan Kim Journal of the Korean Society of Manufacturing Process Engineers.2020; 19(4): 65. CrossRef
Optimization of Manufacturing Conditions of Pressure-Sensitive Ink Based on MWCNTs Sung-Chul Park, In-Hwan Lee, Yong-Hwan Bae, Ho-chan Kim Journal of the Korean Society of Manufacturing Process Engineers.2019; 18(8): 1. CrossRef
Friction and Wear Characteristics of ABS-like Resin for 3D Printing Under Non-Lubricated Condition Young Sang Jo, Hyun Seop Lee Journal of the Korean Society for Precision Engineering.2019; 36(12): 1117. CrossRef
A programmable drug delivery system can control the release rate of a drug. It can minimize side effects while maximizing therapeutic effects. In this research, we investigated the feasibility of producing a programmable drug delivery system using 3D printing technology. A capsule with a micro-orifice and a drug-laden hydrogel was designed. The designed system was then fabricated by the printing process using polycaprolactone and hydrogel. The printed drug delivery system was immersed in PBS at 37°C and the number of molecules released was measured thorough colorimetric analysis. The effect of diameter and length of the micro-orifice and concentration of the hydrogel on drug release characteristics was then determined. The initial burst release rate was found to be increased with increasing orifice size. Increasing the length of the orifice linearly delayed the start time of drug release. At length of 600 μm and 1,200 μm, drug release was initiated after 36 h and 72 h for, respectively. When the concentration of hydrogel was increased, drug release rate tended to decrease. These results successfully confirmed that a drug delivery system with controlled release rate and initiation time could be manufactured using 3D printing technology.
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Evaluation of the Manufacturing and Viral Killing Efficacy of Chitosan Microbeads Loaded with Disinfectants Bong Su Kang, Sung Hak Choi, Moon Kyu Kwak, Ho-Sup Jung Journal of the Korean Society for Precision Engineering.2024; 41(7): 507. CrossRef
User-designed device with programmable release profile for localized treatment Noehyun Myung, Seokha Jin, Hyung Joon Cho, Hyun-Wook Kang Journal of Controlled Release.2022; 352: 685. CrossRef
A tactile sensor is a device that collects pressure information from its environment. However, the sensors mimicking a human’s sensory system have not been sufficiently developed for practical application. It is noted that planar flexible tactile sensors have sufficient elasticity and flexibility for attachment to non-planar surfaces. But, they are subjected to an initial strain when attached to a non-planar surface. Therefore an additional calibration process is required. In this study, the fabrication process of a non-planar flexible tactile sensor is proposed, using a direct writing technology as well as an additive manufacturing technology. A curved elastic sensor body was fabricated using mold by the use of a layer-by-layer process. Moreover, the pressure sensitive material which is composed of MWCNTs and PDMA, was dispensed using a direct writing technology. The non-planar flexible tactile sensor was fabricated and tested in terms of an external pressure.
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Multi-material additive manufacturing process design of sensor embedded soft gripper Kwang Yeol Yu, Hochan Kim, In Hwan Lee Sensors and Actuators A: Physical.2025; 386: 116322. CrossRef
Design and Characterization of Flexible Strain Sensors Using Pressure-Sensitive Material with Multi-walled Carbon Nanotubes and Polydimethylsiloxane Sanho Kim, Chae Young Park, Chien Kim, Ho-Chan Kim, In Hwan Lee International Journal of Precision Engineering and Manufacturing.2023; 24(12): 2361. CrossRef
Study on Output Characteristics of Printed Flexible Tactile Sensors Connected to Brass Terminals Jindong Kim, Yonghwan Bae, Inhwan Lee, Hochan Kim Journal of the Korean Society of Manufacturing Process Engineers.2020; 19(4): 65. CrossRef
Optimization of Manufacturing Conditions of Pressure-Sensitive Ink Based on MWCNTs Sung-Chul Park, In-Hwan Lee, Yong-Hwan Bae, Ho-chan Kim Journal of the Korean Society of Manufacturing Process Engineers.2019; 18(8): 1. CrossRef
Improved resistance stability for tactile sensor fabrication and investigation of the dispensing parameters of a nanocomposite material Chaima Fekiri, Song Ho Kim, Ho-Chan Kim, In Hwan Lee Journal of Mechanical Science and Technology.2019; 33(12): 5631. CrossRef
Chiefly, the metal wire-feed and laser additive manufacturing (AM) is a deposition process to produce larger mechanical parts required for aerospace, shipbuilding, automobile, and mold repair industries. The principal advantage of metal wire-feed AM is the high deposition rate compared to an assisted metal powder-feed AM, and metal powder-based fusion AM. During the wire-feed deposition process, the feed orientation is a critical parameter managed at all stages of processing. A better surface finish is attained when the melted wire flows smoothly through the process, and a wire feed direction that is utilized opposite to the deposition direction yields the best results. To improve the surface quality of metal 3D printing, we designed a rotating wire feeder, the feed direction of which varies with the direction of deposition; all free-form lines which thus exhibit identical surface qualities. Here, we use a rotating stage to orient the wire-feed direction according to the bead direction, a slip ring to supply electrical power to the feeder motor, and utilized two rotating channels on a plate to supply Ar gas and extract fumes safely during the processing stage. We evaluated the rotating wire feeder by building various parts as needed to the equipment.
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Directed Energy Deposition (DED) Process: State of the Art Dong-Gyu Ahn International Journal of Precision Engineering and Manufacturing-Green Technology.2021; 8(2): 703. CrossRef
Estimation Method of Interpass Time for the Control of Temperature during a Directed Energy Deposition Process of a Ti–6Al–4V Planar Layer Bih-Lii Chua, Dong-Gyu Ahn Materials.2020; 13(21): 4935. CrossRef
Investigation of Influence of Laser Parameters and Powder Porosity on Thermal Characteristics in the Powder Bed of a SLM Process Kwang-Kyu Lee, Ho-Jin Lee, Hyun-Sik Kim, Dong-Gyu Ahn, Yong Son Journal of the Korean Society for Precision Engineering.2019; 36(8): 761. CrossRef
CAPP for 3D Printer with Metallic Wire Supplied from the Front Ho-chan Kim, Jae-gu Kim Journal of the Korean Society of Manufacturing Process Engineers.2018; 17(5): 155. CrossRef
It is compelling to realize that the additive manufactured part using wire feeding type directed energy deposition (DED) process is subjected to undesired thermal effects, and induced residual stress during the manufacturing process. In order to improve the quality of the manufactured part, the distributions of temperature and residual stress have to be understood to manage the results of the processing of these materials. The objective of this paper is to investigate the influence of the angle of corner deposition on the distributions of temperature and residual stress of the Ti-6Al-4V deposited bead, and the substrate via thermo-mechanical finite element analyses (FEAs). In the same fashion, the formation of the heat affected zone (HAZ) and the stress influenced region (SIR) are estimated from the measured results of the FEAs. Equally important, it can be stated that from the estimated HAZ and SIR regions, the overlapping of undesired thermal effects and residual stress between two beads fabricated by the wire feeding type DED process can be avoided at the design stage.
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Estimation Method of Interpass Time for the Control of Temperature during a Directed Energy Deposition Process of a Ti–6Al–4V Planar Layer Bih-Lii Chua, Dong-Gyu Ahn Materials.2020; 13(21): 4935. CrossRef
Investigation of Influence of Laser Parameters and Powder Porosity on Thermal Characteristics in the Powder Bed of a SLM Process Kwang-Kyu Lee, Ho-Jin Lee, Hyun-Sik Kim, Dong-Gyu Ahn, Yong Son Journal of the Korean Society for Precision Engineering.2019; 36(8): 761. CrossRef
In this paper, we design and fabricate a wearable walking-assist robot using a tendon-driven method. Most wearable walking-assist robots are designed using the method of the attaching of the motors to the hip, knee, and ankle joints. The robot needs the capacities of the motors attached to the hip and knee joints to equal the weights of the motors attached to the knee and ankle joints and the motor attached to the ankle, respectively. To solve these problems, we design and fabricate the wearable walking-assist robot using a tendon-driven method that rotates the joints by attaching the motors of the hip, knee, and ankle joints to the waist joint, and pulling it with a line. The gait patterns of a normal person are photographed and analyzed, thereby providing the ankle position (x, y) during the walking that is then calculated using the forward kinematic equation, while each joint angle is calculated using the inverse kinematic equation. As a result of the characteristic experiment of the wearable walking-assist robot, the resultant walking aspect is similar to that of the normal person.
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Design and Evaluation of Soft Actuators Including Stretchable Conductive Fibers Hye Won Lee, Yeji Han, Minchae Kang, Ju-Hee Lee, Min-Woo Han Journal of the Korean Society for Precision Engineering.2022; 39(4): 307. CrossRef
Design of Integrated Ankle Torque Sensor and Mechanism for Wearable Walking Aid Robot Han-Sol Kim, Gab-Soon Kim Journal of the Korean Society for Precision Engineering.2020; 37(9): 667. CrossRef
Design and Manufacture of Calf-Link with Knee Joint Torque Sensor for a Tendon-Driven Walking Assistant Robot Jun-Hwan An, Gab Soon Kim Journal of the Korean Society for Precision Engineering.2019; 36(11): 1009. CrossRef
UVW Stage is widely used in manufacturing processes of PCB, LCD, OLED, and semiconductor industries. The precision of UVW Stage is closely associated with the quality of products. Two approaches for kinematics of UVW Stage are proposed for comparative analysis. Program of proposed kinematics algorithm is developed for motion control and applied to UVW Stage driving. The position of the stage for each algorithm is sequentially measured by laser interferometer. Both virtual stage and real stage are used for accuracy analysis. The performance of each algorithm is evaluated based on this accuracy analysis.
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A correction algorithm for determining the motor pivot point coordinates of UVW platforms based on a kinematic motion model Yunchao Zhi, Qunfeng Liu, Mingming Zhang, Jiarui Zhang Computational and Applied Mathematics.2025;[Epub] CrossRef
In this paper, we focus on the numerical modeling of the reliability of the self-piercing rivet process. Tensile tests were conducted on SPR joining Al (ECO Al7021-T7) specimens. In addition, a 2D axisymmetric FE model was generated to characterise the SPR joining process on the extruded Al sheets. The simulations were carried out using the LS-DYNA, one of the representative explicit finite element codes. A tensile simulation of the riveted two Al plates was performed to investigate the tensile behaviour of self-piercing rivet parts. An FE analysis results showed comparatively good agreement with experiments.
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Strength Prediction by Simulating the Cross-Tension Test for Triple Riveted Joints of Aluminum Dissimilar Materials Using 9 mm Self-Piercing Rivet Seung-Min Yuna, Hyeong-seok Jang, Dae-guk Lee, Hee-soo Park, Sang-Yeol Kim Journal of the Korean Society of Manufacturing Technology Engineers.2024; 33(1): 11. CrossRef
Validation of the Joinability of 9 mm SPR for Automotive Dissimilar Material Three-Joint Configurations Using Joining Parameters Hyeongseok Jang, Seungmin Yun, Heesoo Park, Daeguk Lee, Sangyeol Kim Transaction of the Korean Society of Automotive Engineers.2024; 32(4): 387. CrossRef
Comparative Study on J-Integrals of SM45C, Short Fiber GFRP and Woven Type CFRP Shown at Crack through Analytical Method Jae Woong Park, Sung Ki Lyu, Jae Ung Cho Journal of the Korean Society for Precision Engineering.2019; 36(6): 567. CrossRef
Conceptual design is the process to determine the basic concept, to define the overall function, to establish the functional structure, and to develop and complete the structure of the product, which is to be designed. In the existing conceptual design studies, however, it has not been verified that there is a theory regarding the product development process, with figuring out the correlation among Worth (W), Cost (C), and Satisfaction (S), and drawing the design equilibrium constant. Therefore, this paper presents the design equilibrium constant which explains the product development process, but can also be utilized in the conceptual design process. The design equilibrium constant is derived through defining the ideal product, its market competitiveness, and utilizing the process of the formulating Kano model. When utilizing the derived design equilibrium constant, it helps explain how the development process of the product makes progress in the market, and clarifies the change of an aspect of product life cycle.
The rifling is applied to most of the conventional gun barrels to stabilize the projectile using the spin. The rifling force (torque) acting on the projectile inside the barrel also wears the rifling itself and shortens the gun lifespan. To reduce the rifling wear, the increasing rifling angle is designed. The starting-part low angle decreases the rifling force while the increased muzzle angle creates the required projectile spin. With the advance of the computer-aided design and manufacturing, a smooth rifling curve is introduced using the Fourier functions. The method shows a high performance in decreasing the maximum rifling forces, but applying the design constraints is limited due to the sinusoidal features of Fourier functions. In this research, a node-point-based rifling-angle design method is introduced. The optimization algorithm and the interpolation method are used to create the smooth profile from the discrete parameters. With the piecewise cubic hermite interpolating polynomial (PCHIP) monotonicity, it is possible to apply various constraints easily while maintaining the design feasibility. To verify the performance, the design results and the comparisons with the previous methods are presented.
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Analysis of Probability Distribution of Muzzle Velocity for Chrome Plated Barrel Jaekab Kim, Jaehoon Kim Journal of the Korea Institute of Military Science and Technology.2021; 24(4): 401. CrossRef
This paper examines the stability of the blades that convert the wind kinetic energy into the mechanical energy among the small wind power-generation systems, and proposes the design improvement for blades with a higher rigidity and a lighter weight than the conventional blades. The composite-specimen tensile test and static-load test are conducted to verify the reliability. To design the lightweight blade with the high stiffness, the displacement and the safety factor of the blade composed of the composite material are calculated from the structural-analysis results, and the optimal dimensional and material designs are performed. The optimal design parameters are selected by the shear-web lamination angle and the lamination thickness. The objective function is selected by the safety factor and the weight. For the optimum material design, the GFRP is converted into the CFRP. In this paper, the structural improvement is performed by optimizing the dimensional and material designs, the blade stiffness and weight are redesigned and compared with those of the designed blades, and the structural stability of the redesigned blades is also examined.
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The Suitability of Substructures of the Offshore Wind Power Complex Dae Kyung Kim, Dong Soon Kang, Jong Hak Lim, Young Il Byun, Chul Ki Song Journal of the Korean Society for Precision Engineering.2022; 39(4): 299. CrossRef
Evaluation of Structural Integrity for Lifting-and-Lowering-Type Drone Station Using Fluid-Structure Interaction Analysis Sang Ho Kim, Jae Youl Lee, Sung-Ho Hong, Jehun Hahm, Kap-Ho Seo, Jin-Ho Suh, Young Sik Joung, Se Hoon Jeung Journal of the Korean Society for Precision Engineering.2021; 38(11): 841. CrossRef
This study presents a transparent-patch antenna using a silver-mesh transparent electrode film with a high optical transmittance (87.7%), low haze (1.1%), and low sheet resistance (8.9 Ω/sq). The silver-mesh transparent electrode film is fabricated by using UV embossing and doctor blading without any high-temperature or vacuum processes. The UV resin pattern is transferred from a nickel mold to a plastic film, and then a silver paste is filled into the UV resin pattern. The transparent antenna patch and ground plane are obtained by repeating these processes on both sides of a single plastic film. The antenna patch is designed with a width of 44.8 mm and a height of 36.0 mm in order to obtain a resonant frequency at 2.45 GHz, which is a frequency of wireless LAN. As a result, the transparent-patch antenna has a reflection coefficient (S11 parameter) of -35.6 dB, a peak gain of -3.99 dBi, and a radiation efficiency of 6.2% at 2.45 GHz. Finally, a Wi-Fi router using the transparent-patch antenna is demonstrated.
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