• 공학교육연구
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• 제21권6호
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• pp.90-98
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• 2018

This paper proposes a framework of engineering education for product development processes based on product data management (PDM) software and 3D printing. The PDM software supports the product development process-oriented educational coursework, collaborative team projects and project-based learning environment. The 3D printing supports the prototyping step in the product development process and helps participants consider physical realization of their designs during the product design and development phases. The framework was implemented in an introductory course for engineering students to product design and development, and author found that it is important to support rich communication among participants including lecturers, teaching assistants and students to enhance the quality of education and to overcome the burden of learning various computer-aided tools and 3D printing techniques needed for the framework.

• 한국기계가공학회지
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• 제11권3호
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• pp.146-153
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• 2012

RP system which is widely used to reduce the time of product development is to resolve the problem of cutting work. It is a method using laminated thin films to produce many forms. The RP equipment used for this experiment is FDM system. This can produce 3D model with using 3D CAD designed file within a relatively short time. Not only this, this system also through 3D file preparation, 3D product manufacture, removal support these 3 step operating process can easily produce goods, but product can be different from original design. This research has been conducted to minimize this error. To apply to the circular product made a circular specimen and measured several times with 3D scanner and find out average 99.622% of accuracy. This result is applied to RP system, and with this changed design produced a specimen, and found out the accuracy is increased to 99.958%. If this is applied to circular products, we can produce more precise products with less process.

• 한국정보통신학회논문지
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• 제22권11호
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• pp.1505-1510
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• 2018

그래픽스 분야의 제품모델링 제작기술은 급속하게 발전하고 있고 3차원 데이터 응용과 활용성은 계속 증가하고 있다. 제품디자인 제작에 있어 3차원 모델링 제작에는 많은 시간이 소요된다. 최근 역설계 방식은 3D 데이터의 응용과 제작시간단축으로 활용성이 크다. 본 연구는 영상데이터 기반으로 포토메트리를 이용하여 3차원 포인트 클라우드 및 메쉬 데이터를 추출하고 이를 응용하여 제품의 1차 시안을 제작한다. 디자인 수정에 중점을 두어 2차 시안이 제작되었으며 3차 시제품 제작을 위한 3D 프린팅 작업을 진행한다. 이러한 제품디자인 제작과정에서 영상데이터의 활용과 가능성 및 3D 모델링 제작시간의 단축, 효율적인 프로세스를 제시한다. 또한 제품디자인 환경변화에 대응하기 위한 신제품 개발 프로세스 시스템의 모델을 제안한다.

• 한국정밀공학회지
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• 제23권8호
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• pp.195-202
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• 2006

High-speed machining (HSM) with excellent quality and dimensional accuracy has been widely used to create 3D structures of metal and plastics. However, the high-speed machining process is not suitable for the rapid realization of 3D thin-walled product because it consumes considerably long time in fixturing process of a work piece. In this paper, an effective rapid manufacturing process is proposed to fabricate 3D thin-walled products directly using HSM, phase change filling and ultrasonic welding. The filling process is useful to hold the thin-walled product during the machining step. The ultrasonic welding process is introduced to make one piece product from two piece parts that are machined by HSM and filling process. The proposed rapid manufacturing (RM) process has been shown that the RM process enables to fabricate the 3D thin-walled products using ABS plastics and aluminum metals from 3D CAD data to functional parts.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1999년도 춘계학술대회논문집
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• pp.115-118
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• 1999

The twisting and bending extrusion process is developed by the $DEFORM^TM$-3D. Because the rectangular section of the extruded product has the symmetry line of cross-section area, the twisting and the bending of extruded product has not occurred. The product with the rectangular section is applied to the twisting and bending extrusion process through the twisted die surface and eccentricity die section. It is shown that the twisting of extruded product is caused by the twisted die surfaces and the bending of extruded product is causd by the eccentricity between the die section. The results by the analysis show that the twisting angle and the curvature of extruded products increases by the die twisting angle, the eccentricity, but decreases by the die length, and friction condition

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.26-29
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• 2003

UV laser micromachining are generally used to create microstructures for micro product through a sequence of lithography-based photopatterning steps. However, the micromachining process is not suitable for the rapid realization of complex microscale 3D product because it depends on worker experiences, excessive cost and time to make many masks. In this paper, the more effective micro rapid manufacturing process, which is developed upon the base of laser micromachining. is proposed to fabricate micro products directly using UV laser ablation and phase change filling. The filling process is useful to hold the micro product during the next ablation step. The proposed micro rapid manufacturing process is also proven experimentally that enables to fabricate the 3D microscale products of UV sensitive polymer from 3D CAD data to functional micro parts.

• 한국정밀공학회지
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• 제22권11호
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• pp.196-201
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• 2005

UV laser micromachining are generally used to create microstructures for micro product through a sequence of lithography-based photopatterning steps. However, the micromachining process is not suitable for the rapid realization of complex 3D micro product because it depends on worker experiences, excessive cost and time to make many masks. In this paper, the more effective micro rapid manufacturing process, which is developed upon the base of laser micromachining, is proposed to fabricate micro products directly using UV laser ablation and phase change filling. The filling process is useful to hold the micro product during the next ablation step. The proposed micro rapid manufacturing process is also proven experimentally that enables to fabricate the 3D micro products of UV sensitive polymer from 3D CAD data to functional micro parts.

• 한국산학기술학회논문지
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• 제18권11호
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• pp.802-809
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• 2017

3D 프린팅 제조 기술은 폴리머 및 금속 소재를 구조물 형상으로 적층하여 제품을 제작하는 성형기술로서, 설계 자유도가 높고 기능성을 요구하는 부품 제작에 유리하다. 또한 다품종 소량 생산 특성으로, 향후 철도 차량 부품 제작에 적합한 기술이다. 3D 프린팅 기술의 장점을 충분히 활용하기 위해서는 제품 설계시 공정 특성 고려가 필수이다. 이번 연구에서는 철도차량용 공기압축기의 열교환기를 대상으로, 3D 프린팅 기법 적용을 통한 제작을 위해, 성능과 공정조건을 고려한 제품의 재설계 및 제작 기술을 연구하였다. 먼저 열교환기의 성능을 높이기 위한 설계 컨셉을 정의하고 기존 열교환기의 시험을 통해 성능 분석 후, 이를 만족하기 위한 컨셉 설계 범위를 지정하였다. 또한 금속 3D 프린팅의 제작 한계 및 제작 시간, 특성 등을 고려하여, 상세 설계에 관한 수정을 진행하였다. 도출된 최종 설계안을 토대로, 알루미늄 소재를 사용하여 3D 프린팅 공정을 통해 제품을 제작하고 치수 정밀도를 만족함을 확인하였다. 최종 중량은 기존 제품 대비 41%의 중량 절감 효과를 보였다. 본 연구를 통해, 3D 프린팅 기술 활용을 위한 제품 설계 과정을 정립함으로써, 향후 3D 프린팅 기술 적용시 효율적인 설계가 가능할 것이다.

• 산업공학
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• 제24권1호
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• pp.58-70
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• 2011

As more individuals and organizations participate in the complex design process of manufacturing industry, collaborative product development and management of the global supply chain have become more popular. Although the product quality concerns once focused on the manufacturing process, they are now directed at earlier stages of the design cycle where the engineering product is created as a 3D CAD model. In this paper, we describe the current state of product data quality activities in the manufacturing industry and the yardstick to measure 3D CAD data quality. Moreover we introduce a quality assurance method through the result of statistical analysis of 3D CAD models and suggest a six sigma level of CAD data quality by analyzing 76 samples provided from three Korean automotive companies.

• Design & Manufacturing
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• 제9권1호
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• pp.18-22
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• 2015

Mold making and product manufacturing process was made by a die through a number of stages. Thereby, it takes a long period of time from the manufacture of mold until passed the products to consumers. However, it is not possible to meet the diverse desires purchasing of consumer. We made a 3D CAD Model aligned with product scan data using reverse engineering. Utilizing thereafter flow analysis to derive the optimal mold conditions, by applying the condition, and devised a mold fabrication process that is much shorter than the conventional process for fabricating a mold. In this study, the outlet cover to the product, it describes a process, as a result, it was confirmed that the number of steps can be shortened much more than the conventional process.