• 한국CDE학회논문집
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• 제7권2호
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• pp.131-139
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• 2002

Custom-tailored products always vary their sizes and shapes to satisfy the customers' tastes and requirements but they have to be fabricated as fast as possible when ordered. One way to solve this problem is to prepare several representative products in advance and each custom-tailored product is generated by machining the closest representative product. To realize this approach, it would be necessary to be able to group the products into several groups each of which has a representative product. Once the similar products are identified to be grouped, the representative shape can be generated such that all the products in the group can be made by machining the representative product. The custom-tailored products considered in this work have similar shapes but different sizes. Since these products have free surfaces, that are hard to be compared, their convex hulls are used for the grouping. Among all the products to be grouped, one product is chosen as a base shape. The shape and overall similarity values between the base shape and the remaining shapes are calculated as their convex hulls are rotated virtually. By calculating these similarity values at each rotation, the optimal alignment of the reference shape with respect to the base shape is determined. Overall similarity value at this optimal alignment is used as a measure for grouping. A prototype system based on the proposed methodology has been implemented and used to group the shoe-lasts for custom-tailored shoes.

• 한국정밀공학회지
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• 제21권1호
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• pp.159-166
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• 2004

Custom-tailored products are meant by the products having various sizes and shapes to meet the customer's different tastes or needs. Thus fabrication of custom-tailored products inherently involves inefficiency. To minimize this inefficiency, a new paradigm is proposed in this work. In this paradigm, different parts are grouped together according to their sizes and shapes. Then, representative shape of each group is derived and it will be used as the work-piece from which the parts in the group are machined. Once a new product is ordered, the optimal work-piece is selected through making similarity comparisons of new product and each representative shape. Then an effective NC tool-path is generated to machine only the different portions between the work-piece and the ordered product. The efficient machining conditions are also derived from this shape difference. By machining only the different portions between the work-piece and the ordered product, it saves time. Similarity comparison starts with the determination of the closest pose between two shapes in consideration. The closest pose is derived by comparing the ray distances while one shape is virtually rotated with respect to the other. Shape similarity value and overall similarity value calculated from ray distances are used for grouping. A prototype system based on the proposed methodology has been implemented and applied to the grouping and machining of the shoe lasts of various shapes and sizes.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.70-73
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• 2003

Custom-tailored products are meant by the products having various sizes and shapes to meet the customer's different tastes or needs. Thus fabrication of custom-tailored products inherently involves inefficiency. To minimize this inefficiency, a new paradigm is proposed in this work. In this paradigm. different paris are grouped together according to their sizes and shapes. Then, representative shape of each group is derived and it will be used as the work-piece from which the parts in the group are machined. Once a new product is ordered, the optimal work-piece is selected through making similarity comparisons of new product and each representative shape. Then an effective NC tool-path is generated to machine only the different portions between the work-piece and the ordered product. The efficient machining conditions are also derived from this shape difference. By machining only the different portions between the work-piece and the ordered product, it saves time. Similarity comparison starts with the determination of the closest pose between two shapes in consideration. The closest pose is derived by comparing the ray distances while one shape is virtually rotated with respect to the other. Shape similarity value and overall similarity value calculated from ray distances are used for grouping. A prototype system based on the proposed methodology has been implemented and applied to the grouping and machining of the shoe lasts of various shapes and sizes.

• 한국정보통신학회논문지
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• 제24권7호
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• pp.873-878
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• 2020

최근 3D 프린터의 발전으로 인하여 3D 프린팅에 대한 관심이 커지고 있다. 3D 프린팅은 사용자의 요구특성에 맞도록 제품을 설계하여 개인의 욕구와 다양한 요건들이 반영되어야 한다. 3D 프린팅 제품이 사용자의 요구특성에 따른 제품 구매 의도에 관한 활용방안 연구는 미흡하다. 따라서 본 연구는 3D 프린팅 환경에서 개인 맞춤형 컨트롤러 제품 구매 의도의 영향요인에 대하여 알아보기 위하여 설문조사 및 통계분석 하였다. 연구결과 사용자의 혁신성과 편의성 안전성이 개인 맞춤형 컨트롤러 제품의 만족과 구매 의도에 중요한 요소임을 확인하였다. 3D 프린팅을 활용한 컨트롤러 제품 제작 시 사용자의 혁신성과 편의성, 안전성을 고려한다면 개인 맞춤형 컨트롤러제작의 가치를 높일 수 있을 것으로 예상된다. 개인 맞춤형 제품의 생산방식을 초기에 성공적으로 도입하고 이를 구체적이고 체계적으로 지원하는 개인 맞춤형 제품 개발 프레임워크에 관한 연구가 필요하다.