권호 표지

Korean Journal of Computational Design and Engineering (한국CDE학회논문집)

Society for Computational Design and Engineering (SCDE)

  • Quarterly
  • /
  • 2508-4003(pISSN)
  • /
  • 2508-402X(eISSN)

Domain

  • Information/Communication ＞ Information Processing Theory

Aim & Scope

목적 이 규정은 사단법인 한국CDE학회(이하 ‘학회’라 한다) 정관 제4조 (사업) 및 학회규정 제4장 ‘학술지 편집’에 의거하여 학회에서 매년 4회 (3, 6, 9, 12 월의 1일) 발간하는 국문논문집 “한국CDE학회논문집(이하 ‘논문집’이라 한다)” 투고에 대한 사항을 규정함을 목적으로 한다. 투고내용 및 범위 ① 투고 논문은 학술적 또는 기술적인 기여도가 있어야 하며, 논문집에 투고하기 전에 타 간행물에 발표되지 않은 내용이어야 한다. ② 투고논문의 범위는 Computational Design and Engineering 전 분야에 대한 이론 및 응용연구 결과를 대상으로 한다. ③ 논문은 학술적 기여도와 독창성이 높은 학술논문과, 기술적 기여도와 실용성이 높은 응용논문으로 구분한다. Society for Computational Design and Engineering (pISSN 2508-4003 / eISSN 2508-402X) published quarterly (March, June, September, December) by Society for Computational Design and Engineering(free subscription for the members of Society for Computational Design and Engineering) since 1996 (It was launched in 1996) welcomes original papers from both industrial and academic contributors in Computational Design and Engineering areas. The areas include, but are not limited to, Architectural CAD, Bio-CAD/Nano-CAD, CAD/CAM Education, CAPP, CNC Machining, Computational Geometry, Concurrent/Collaborative Engineering, Construction IT, Digital Manufacturing, Design Methodology, Feature Technology, FEM/Optimization, Human Modeling & Engineering, Industrial Design Knowledge based Engineering, Mechanical CAD, Mesh Generation, Ontology, PDM/PLM/CPC, Plant CALS, Product Data Exchange/PDQ, Rapid Prototyping & Tooling, Scientific Visualization, Ship CAD, Solid/Assembly Modeling, Surface Modeling, User Interaction Techniques, Virtual Reality/Graphics, etc.

http://journal.cadcam.or.kr/ KSCI KCI

Volume 4 Issue 1

  1. Haeseong Jee 1
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    surface texture denotes set of tiny repetitive geometric features on an object surface. 3D Printing can readily create a surface of controlled macro-textures of high geometric complexity. Designing surface textures for 3D Printing, however, is difficult due to complex macro-structure of the tiny texture geometry since it needs to be compatible with the non-traditioal manufacturing method. In this paper we propose a visual simulation technique involving development of a virtual model-an intermediate geometric model-of the surface texture design prior to fabricating the physical model. Careful examination of the virtual model before the actual fabrication can help minimize unwanted design iterations. The proposed technique demonstrated visualization capability by comparing the virtual model with the physical model for several test cases.
  2. 채영호 12
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    A deformable non-Uniform Rational B-Spline (NURBS) based volume is programed for the force reflecting exoskeleton haptic device. In this work, a direct free form deformation (DFFD) technique is applied for the realistic manipulation. In order to implement the real-time deformation, a nodal mapping technique is used to connect points on the virtual object with the NURBS volume. This geometric modeling technique is ideally incorporated with the force reflecting haptic device as a virtual interface. The results in this work introduce details for the complete set-up for the realistic virtual clay modeling task with force feedback. The force reflecting exoskeleton haptic manipulator, coupled with a supporting PUMA 560 manipulator and the virtual clay model are integrated with the graphics display, and results show that the force feedback from the realistic physically based virtual environment can greately enhance the sense of immersion.
  3. 박삼진 19
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    One of the non-photorealistic rendering method, a drawing technique which uses only fine curves and dashed line, is widely employed in an knots and post stamps printing. Engraving of the curves and lines are traditionally performed by human engravers which leads to low productivity in printing preparation. As an effort to improve productivity and quality, a drawing automation method which can easily produce a portrait composed of vector data for laser or chemical engraving is proposed. The method shows that it is possible to draw a portrait by controling the width and length of predefined fine lines according to the gray scales a the end points of each fine lines. A gradually controled weighting factor method is proposed in addition to the author previous works to prevent undesirable boundaries in an identical texture region. User interface functions of a commercial CAD system are heavily employed to exploit the presented method.
  4. 박형준;김광수 32
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    Approximate lofting or skinning is one of practical surface modeling techniques well used in CAD and reverse engineering applications. Presented in this paper is a method for approximately lofting a given set of curves wihin a specified tolereance. It is based on refitting input curves simultaneously on a common knot vector and interpolating them to get a resultant NURBS surface. A concept of reducing the number of interior knots of the common knot vector is well adopted to acquire more compact representation for the resultant surface. Energy minimization is newly introduced in curve refitting process to stabilize the solution of the fitting problem and get more fair curve. The proposed approximate lofting provides more smooth surface models and realizes more efficient data reduction expecially when the parameterization and compatibility of input curves are not good enough. The method has been successfully implemented in a new CAD/CAM product VX Vision? of Varimetrix Corporation.
  5. 정채봉;김재정 43
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    Producing the relevant information (features) from the CAD models of CAM, called feature recognition or extraction, is the essential stage for the integration of CAD and CAM. Most feature recognition methods, however, have problems in the recognition of intersecting features because they do not handle the intersection geometry properly. In this paper, we propose a machining feature recognition algorithm, which has a solid model consisting of orthogonal primitives as input. The algorithm calculates candidate features and constitutes the Intersection Geometry Matrix which is necessary to represent the spatial relation of candidate features. Finally, it recognizes machining features from the proposed candidate features dividing and growing systems using half space and Boolean operation. The algorithm has the following characteristics: Though the geometry of part is complex due to the intersections of design primitives, it can recognize the necessary machining features. In addition, it creates the Maximal Feature Volumes independent of the machining sequences at the feature recognition stage so that it can easily accommodate the change of decision criteria of machining orders.
  6. 박상봉 52
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    The CAD/CAM System for deep drawing transfer die tin mechanical press process has been developed. The developed CAD system can generate the drawing of transfer die in mechanical press. Using thee results from CAD system, it can generate the NC data to machine die's elements on the CAD system. This system can reduce design man-hour an human errors. In order to construct the system, it is used to automated the design process and generate the NC data using concepts of the designing rule and the machining rule. The developed system is based on the knowledge base system which is involved a lot of expert's technology in the practice field. Using AutoLISP language under the AutoCAD system, CTK customer language of SmartCAM is used as the overall CAD/CAM environment. Results of this system will be provide effective aids to the designer and manufacturer in this field.
  7. 김용환;윤정호;이관행 60
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    In reverse engineering (RE) sustems, the quality of the data aquisition process is crucial to the accuracy of the reverse engineered three dimensional computer-aided design (CAD) model. However, these tasks are predominantly done manually, and little work has been done to improve the efficiency of scanning by determining the minimum number of scans and the optimal scanning directions. In this paper, new scanning and registration methods using tooling balls are developed to assist in determining the optimal parameter for these processes. When the object to scanned has no concavity, attaching path of the object and its bounding rectangle are used for optimal scanning and registration. Then minimum number of tooling balls and their positions are calculated automatically. In the case of concave parts, the scanning plan should include a complete scan of the concave area. With the surface normal vector and the scanning direction, the minimum degree of rotating the part can be calculated. But the maximum rotation should be restricted in order to prevent occlusion of the part. Finally tow sample part ar scanned based on the proposed methods and the results are discussed.
  8. 박상봉 69
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    This paper describes an expert system of progressive die. Because of the complexity for die structure and of the critical problems for press machine mechanism in the progressive press process such as, the travel length in process, the equalized press load, and the other design parameter, it has been increased the requirement of the CAD system for progressive die design more an more. So, through this study, an expert system of progressive die has been developed. The results from the system developed were suggested the possibility of applications in the practice. To develop this system, it has used c-language under the HP-UNIX system and CIS customer language of the EXCESS CAD/CAM system. An application of this system will provide effective aids to the designer in this field.