• Title/Summary/Keyword: 3-D Printing

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3D Printing Characteristics of Automotive Hub using 3D Scanner and Reverse Engineering (3D 스캐너와 역설계를 활용한 자동차용 허브의 프린팅 특성)

  • Kim, Hae-Ji
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.10
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    • pp.104-109
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    • 2019
  • Reverse engineering techniques using 3D scanners and 3D printing technologies are being used in various industries. In this paper, the three-dimensional model is designed for automotive hub parts through 3D scanning and reverse engineering, and the design of hub parts is intended to be printed on FDM-style 3D printers to measure and analyze the dimensions of hub parts designed for reverse design and 3D printed hub parts. Experimental result have shown that the dimensions of 3D printed hub parts are small compared to those of the reverse-engineered dimensions, which are due to the shrinkage of filament materials in 3D printing.

3D Printing in Modular Construction: Opportunities and Challenges

  • Li, Mingkai;Li, Dezhi;Zhang, Jiansong;Cheng, Jack C.P.;Gan, Vincent J.L.
    • International conference on construction engineering and project management
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    • 2020.12a
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    • pp.75-84
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    • 2020
  • Modular construction is a construction method whereby prefabricated volumetric units are produced in a factory and are installed on site to form a building block. The construction productivity can be substantially improved by the manufacturing and assembly of standardized modular units. 3D printing is a computer-controlled fabrication method first adopted in the manufacturing industry and was utilized for the automated construction of small-scale houses in recent years. Implementing 3D printing in the fabrication of modular units brings huge benefits to modular construction, including increased customization, lower material waste, and reduced labor work. Such implementation also benefits the large-scale and wider adoption of 3D printing in engineering practice. However, a critical issue for 3D printed modules is the loading capacity, particularly in response to horizontal forces like wind load, which requires a deeper understanding of the building structure behavior and the design of load-bearing modules. Therefore, this paper presents the state-of-the-art literature concerning recent achievement in 3D printing for buildings, followed by discussion on the opportunities and challenges for examining 3D printing in modular construction. Promising 3D printing techniques are critically reviewed and discussed with regard to their advantages and limitations in construction. The appropriate structural form needs to be determined at the design stage, taking into consideration the overall building structural behavior, site environmental conditions (e.g., wind), and load-carrying capacity of the 3D printed modules. Detailed finite element modelling of the entire modular buildings needs to be conducted to verify the structural performance, considering the code-stipulated lateral drift, strength criteria, and other design requirements. Moreover, integration of building information modelling (BIM) method is beneficial for generating the material and geometric details of the 3D printed modules, which can then be utilized for the fabrication.

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A Study on Tensile Strength of the Product According to Humidity During 3D Printing Process (3D프린팅 공정 중 공기 습도에 따른 출력물의 인장 강도에 관한 연구)

  • Lee, Song Yeon;Huh, Yong Jeong
    • Journal of the Semiconductor & Display Technology
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    • v.20 no.4
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    • pp.177-181
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    • 2021
  • Scaffolds protect the sensor in the body. Scaffolds are made of a bioabsorbable polymer. The polymer process is sensitive to humidity. Inside of the 3D printer has been improved to control the humidity. Specimens were produced by injection molding and 3D printer. 3D printed specimens were printed under various humidity conditions. We measured tensile strength of the injection-molded specimen and tensile strength of the 3d printing specimen. We compared tensile strength of the injection-molded specimen and tensile strength of the 3d printing specimen. Tensile strength of the injection-molded specimen is 557 kgf/cm2. We confirmed tensile strength of the specimen was highest at 741 kgf/cm2 when the humidity was 10 %. We confirmed lower the humidity, higher tensile strength of the polymer product.

Short Review of 3D Printed Piezoelectric Sensors

  • Chang, Sang-Mi;Kang, Chong-Yun;Hur, Sunghoon
    • Journal of Sensor Science and Technology
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    • v.31 no.5
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    • pp.279-285
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    • 2022
  • Recently, 3D printing technology has gained increased attention in the manufacturing industry because it allows the manufacturing of complex but sophisticated structures as well as moderate production speed. Owing to advantages of 3D printers, such as flexible design, customization, rapid prototyping, and ease of access, can also be advantageous to sensor developments, 3D printing demands have increased in various active device fields, including sensor manufacturing. In particular, 3D printing technology is of significant interest in tactile sensor development where piezoelectric materials are typically embedded to acquire voltage signals from external stimuli. In regard with piezoelectricity, researchers have worked with various piezoelectric materials to achieve high piezoelectric response, but the structural approach is limited because ceramics have been regarded as challenging materials for complex design owing to their limited manufacturing methods. If appropriate piezoelectric materials and approaches to design are used, sensors can be fabricated with the improved piezoelectric response and high sensitivity that cannot be found in common bulk materials. In this study, various 3D printing technologies, material combinations, and applications of various piezoelectric sensors using the 3D printing method are reviewed.

3D printing-based Fabrication of Orthotic Devices Using 3D Computer-Aided Design and Rapid Prototyping (3차원 그래픽 설계와 3D 프린팅에 의한 보조기 쾌속조형 제작 방법 연구)

  • Choi, B.G.;Heo, S.Y.;Son, K.T.;Lee, S.Y.;Na, D.Y.;Rhee, K.M.
    • Journal of rehabilitation welfare engineering & assistive technology
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    • v.9 no.2
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    • pp.145-151
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    • 2015
  • In this paper, we proposed the fabrication methodology of orthotic device using 3D Computer-Aided Design programme and 3D printing technology based on images acquired from 3D scanner. We set the process and methodology of its fabrication method and confirmed whether it is available for clinical by fabricating four kinds of orthotic device for a patient with cerebral palsy. 3D printing technology method was indicated quantitatively and qualitatively about duration, tensile strength stronger comparing with conventional method, and we could propose that the 3D printing technology for the orthosis could be the proper method to mediate and compensate with reported problems related to orthosis.

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3D Bioprinting Technology in Biochemical Engineering (바이오화학공학에서 3D 바이오프린팅 기술)

  • Eom, Tae Yoon
    • Korean Chemical Engineering Research
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    • v.54 no.3
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    • pp.285-292
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    • 2016
  • Three-dimensional (3D) printing is driving major innovation in various areas including engineering, manufacturing, art, education and biosciences such as biochemical engineering, tissue engineering and regenerative medicine. Recent advances have enabled 3D printing of biocompatible materials, cells and supporting components into complex 3D functional tissues. Compared with non-biological printing, 3D bioprinting involves additional complexities which require the integration of technologies from the fields of biochemical engineering, biomaterial sciences, cell biology, physics, pharmaceutics and medical science.

The Perception of 3D Printing Technology for Adoption in Domestic Architecture Industry (국내 건축분야 3D 프린팅 기술의 실무 도입에 관한 인식)

  • Shin, Jaeyoung;Won, Jisun;Ju, Ki-Beom;Seo, Myoung-Bae;Park, Hyung-Jin
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.11
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    • pp.731-739
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    • 2017
  • As Additive Manufacturing (AM), so-called 3D printing technology, has become visualized, its potential for Mass-Customization, production costs and time savings has extended the scope of utilization to the architecture domain. Several cases that produced facilities, building elements and components using 3D printing technology have been announced mainly on the outside. There is also the development of foundation technologies including 3D printing-specific materials and equipment in Korea. As 3D printing technology in the architecture domain is currently in the early stages of adoption, realistic and systematic strategies are needed to advance it to the commercialization stages, considering the current circumstances of the industry. With this background, this study surveyed experts to investigate the status of the perception of 3D printing technology for adoption in domestic architecture industry. 3D printing technology is expected to be commercialized in areas of irregular-shape buildings and interior markets rather than general construction area. 3D printed products expected to be commercialized are limited to the level of building elements and the aesthetic factor is regarded as the most competitive factor. To enhance the possibility of the commercialization of 3D printed products, the 3D printing-specific construction method, related policies and systems are required along with the performance and stability of the materials and equipment.

Characterization and Classification of Pores in Metal 3D Printing Materials with X-ray Tomography and Machine Learning (X-ray tomography 분석과 기계 학습을 활용한 금속 3D 프린팅 소재 내의 기공 형태 분류)

  • Kim, Eun-Ah;Kwon, Se-Hun;Yang, Dong-Yeol;Yu, Ji-Hun;Kim, Kwon-Ill;Lee, Hak-Sung
    • Journal of Powder Materials
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    • v.28 no.3
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    • pp.208-215
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    • 2021
  • Metal three-dimensional (3D) printing is an important emerging processing method in powder metallurgy. There are many successful applications of additive manufacturing. However, processing parameters such as laser power and scan speed must be manually optimized despite the development of artificial intelligence. Automatic calibration using information in an additive manufacturing database is desirable. In this study, 15 commercial pure titanium samples are processed under different conditions, and the 3D pore structures are characterized by X-ray tomography. These samples are easily classified into three categories, unmelted, well melted, or overmelted, depending on the laser energy density. Using more than 10,000 projected images for each category, convolutional neural networks are applied, and almost perfect classification of these samples is obtained. This result demonstrates that machine learning methods based on X-ray tomography can be helpful to automatically identify more suitable processing parameters.

A study of 3D CAD and DLP 3D printing educational course (3D CAD와 DLP 3D 프린팅 교육과정에 관한 연구)

  • Young Hoon Kim;Jeongwon Seok
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.33 no.1
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    • pp.22-30
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    • 2023
  • Currently, almost all product development in the jewelry industry utilizes 3D CAD and 3D printing. In this situation, 3D CAD modeling and 3D printing ability units in colleges, Tomorrow Learning Card Education, and Course Evaluation-type jewelry design related education are conducted with developed curriculum based on the standards for training standards, training hours, training equipment, and practice materials presented by NCS. Accordingly, this study analyzes 3D CAD modeling and 3D printing training facilities, training hours, training equipment, etc into three categories of NCS precious metal processing and jewelry design, and studies the development of educational systems such as 3D CAD/3D printing curriculum and various environments that meet these standards. Education using this 3D CAD/3D printing education system will enable us to continuously supply professional talent with practical skills not only in the jewelry industry but also in the entire 3D CAD/3D printing manufacturing industry, which is called as one of the pillars of the 4th Industry. The quality of employment of trainees receiving education and the long-term retention rate after employed can also have a positive effect. In addition, excellent educational performance will help improve the recruitment rate of new students in jewelry jobs or manufacturing-related departments, which are difficult to recruit new students in recent years.

Formative characteristics of 3D printing fashion from the perspective of mechanic aesthetic (기계 미학적 관점에서 살펴본 3D Printing 패션의 조형적 특성)

  • Kim, Young-Sam;Lee, Jin-Ah;Kim, Jang-Hyeon;Jun, Yuh-Sun
    • The Research Journal of the Costume Culture
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    • v.23 no.2
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    • pp.294-309
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    • 2015
  • This study aims to clarify the aesthetic values between emotion of human and expression of technology in contemporary fashion as it analyzes formative characteristics of related cases in fashion based on principles of 3D Printing technology and the viewpoint of mechanic aesthetics. The conclusions of this study are as follows. First, 3D Printing fashion is not only expressed diverse variations by its principles of formative methods, materials and properties, but also changes of silhouette by applying system of designers. Second, general characteristics of 3D Printing fashion is represented by various applications in SLS system, and it can be specifically explained application to a portion of clothing, decorative roles of clothing, complicated pattern making through crossing fabrics using 3D scanner and displaying a certain object changing fashion styles, and so forth. Third, the formative characteristics of 3D Printing fashion from the perspective of mechanic aesthetics is as follows. It can be analyzed as the integration of metaphysical values through compared symbolization of natural feature and technical evolution, partial dynamics and interactive velocity-based, formative combinations for abstract expression using architectural components, cosmos images and substantialized structures through images of organic space interacted human shapes. As the mention above, 3D Printing technology can creative a diverse area of fashion, and express images of new technological fashion through various works with continuous development of techniques.