• Journal of the KSME
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• v.54 no.4
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• pp.41-45
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• 2014

최근 3차원 프린팅 기술은 사회적으로 많은 관심을 받고 있으며, 공학교육의 효율성을 높일 수 있는 방안으로 거론되고 있다. 이 글에서는 공학교육에서의 3차원 프린팅 응용사례를 소개하며, 특히 CAD 과정과 종합설계 교과목의 사례에 대해 살펴보고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.437-438
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• 2007

• Proceedings of the KAIS Fall Conference
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• 2002.11a
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• pp.263-265
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• 2002

제품 개발 초기부터 3차원 CAD를 이용하여 설계를 하고 쾌속조형기를 이용하여 시제품을 제작한 후 이를 이용하여 제품의 성능시험을 하는 새로운 개발공정을 제시하였다. 이 공정을 방향기 개발에 적용함으로써 기존의 시작금형을 이용한 공정보다 제품의 개발기간과 개발비용을 획기적으로 절감할 수 있었다. 또한 설계단계부터 3차원 CAD를 이용함으로써 제품개발의 시행착오 횟수를 크게 줄일 수 있었다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.440-444
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• 1995

StereoLithography는 3차원 CAD로 작성된 모델데이타를 이용하여입체조형 실물을 빠르게 제작 하는 Rapid Prototype 기술의 한 방식으로서, 감광성 수지를 자외선 Laser 광에 의해 선택적으 로 경회시켜 원하는 한 단면형상을 이룬후 적층하는 반복작업에 의해 입체 형상을 조형하는 기법 이다. Rapid Prototype 시스템은 제품개발기간 단축과 설계완성도를 높이는 목적으로 최근 산업계에서 그 활용도가 점차 증가하는 추세에 있으며, 3차원 CAD 시스템과 함께 제품개발 체제를 통합화하고 Concurrent Engineering의 실현을 위한 주요한 Tool로써 자리를 잡아가고 있다.

• Korean Journal of Computational Design and Engineering
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• v.7 no.3
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• pp.202-209
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• 2002

It is difficult to support collaborative design with a conventional ship CAD system which manages design information using files. In this research, file storage has been replaced with a database. This paper describes the OpenDIS which is an interface between the geometric kernel and the database. Its main purpose is to implement the CAD system which has the STEP database as the native storage. A prototype CAD system has been implemented using that OpenDIS interface which is implemented by OpenCascade geometric kernel and the Objectstore object-oriented database. The STEP methodology is used as the database schema. This CAD system has been applied to the hull design of a ship in order to verify the usefulness of the interface.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.19 no.9
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• pp.59-70
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• 2020

Three-dimensional (3D) design data is used for various purposes throughout the life cycle of a plant construction project. Plant 3D CAD systems support 3D modeling based on specs-catalogs, which contain data that are used for different purposes such as design, procurement, production, and handover. Therefore, it is important to share the spec-catalog data in the 3D design model with other application systems. Sharing this data thus requires a system that extracts spec-catalog data from plant 3D CAD systems and converts them into neutral model data. In this paper, we analyze equipment spec-catalog data of plant 3D CAD systems and, based on these analyses, define the data structure for neutral spec-catalog data. We subsequently propose a procedure that translates native spec-catalog data to neutral model data and develop a prototype system that performs this operation. The proposed method is then experimentally validated for the test spec-catalog data.

• Journal of the Korean Society for Precision Engineering
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• v.31 no.12
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• pp.1085-1091
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• 2014

Recently, 3D printing has received increasing attention due to its boundless potentials. Because 3D printing starts from 3D geometry information, computer-aided design (CAD) is an essential technology to build 3D geometry data. These days, education of 3D CAD for engineering students has been changed from the theoretical lecture to practical design training using commercial CAD software. As a result, open-ended design projects have replaced the traditional theoretical examinations to evaluate students' outcomes. However, such design projects are not enough to evaluate students' outcomes because their results are expressed in two-dimensional ways. In this paper, applications of 3D printing in engineering design education are discussed by describing the procedure and outcomes of design projects. It was found that the use of 3D printing could improve students' outcomes by fabricating real physical models out of their designs.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.270-273
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• 2015

In shipbuilding and marine industry, engineering and design software solutions have upgraded from the original 2D schematic data based CAD system to a modern 3D drawing-based system. Due to the fact that the massive amount of data usage in real time and data volumes of various engineering models including graphic data have increased, several problems such as lack of server resources and improper handling of 3D drawings have been raised. Besides, increasing the number of session connections per server can cause deterioration of server performance. Recently, increasing the yard's sophisticated design capabilities highlighted the need to develop engineering and design system which would not only overcome the network performance issues, but would provide efficient collaborative design environment. This paper presents an overview of the framework for collaborative engineering design system based on the virtual application (Citrix XenApp 6.5)and acceleration hardware technology of 3D graphics (NVIDIA GRID K2 solution).

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1997.10a
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• pp.207-212
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• 1997

The purpose of this study is the development of CAM system which can cut and measure any shape by machining center and coordinate measuring machine. The overall goal of the CAM system is to achieve the CNC machining, from digitizing through to final cutting. The hardware of the system comprises PC and machining center, CMM. There are three steps in the CNC machining, (1) workpiece measuring on the CMM, (2) geometric modeling by the CAD system, (3) NC commands generation by the tool path compensated for tool nose radius. It is developed a software package, with which can conduct a micro CAM system in the PC without economical burden.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.7 no.4
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• pp.79-88
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• 1998

This study deals with the development of CAM system which can machine and measure any shape of mold and die by machining center and coordinate measureing machine . The overall goal of the CAM system is to achieve the mold and die machining , from digitizing through to final cutting. The hardware of the system comprises PC and machining center. CMM. There are three steps in the mold and die machining. (1) measuring of physical model by the CMM, (2) geometric modeling by the CAD system, (3) generation of NC code by the tool path compensated for tool radius. It is developed a software package, with which can conduct a micro CAM system in the PC without economical burden.