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池海成,李東烈 弘益大學校 科學技術硏究所 2003 科學技術硏究論文集 Vol.14 No.-
Direct Metal Deposition (DMD) is a new additive process producing three-dimensional metal components or tools directly from CAD data, which aims to take mold making and metalworking in an entirely new direction. It is the blending of five common technologies: lasers, CAD, CAM, sensors and materials. In the resulting process, alternatively called laser cladding, an industrial laser is used to locally heat a spot on a tool-steel work piece or platform, forming a molten pool of metal. A small stream of powdered tool-steel metal is then injected into the metal pool to increase the size of the molten pool. By moving the laser beam back and forth, under CNC control, and tracing out a pattern determined by a computerized CAD design, the solid metal part is eventually built line-by-line, one layer at a time. DMD produces improved material properties in less time and at a lower cost than is possible with traditional fabrication technologies.
신속성형기술 전용 형상 모델링 기술 개발-표면 미세돌기의 설계
池海成 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1
This paper presents a geometrical modeling technique including an energy method for defining a regular texture field made by an RP apparatus. The texture field is supposed to be made from both a parametric surface and a non-analytic STL CAD model using an energy minimization analogy based on energy constraints. Designing surface texture for rapid prototyping, however, is difficult due to complex macro-structure of the tiny texture geometry that must be compatible with the non-traditional manufacturing method of rapid prototyping. An application of geometric modeling techniques to development of a computer-aided design tool for solving the addressed problems is proposed in this paper. Manufacturing constraints are identified, formulated, and introduced into a unified design constraints framework being incorporated into the design of a texture cell. Also, an energy minimizing parametric geometry is devised and implemented to create an optimal texture geometry.
내구강도와 중량을 고려한 인 라인 스케이트 프레임의 설계 해석
池海成,李東烈 弘益大學校 科學技術硏究所 2004 科學技術硏究論文集 Vol.15 No.-
In-line skate generally consists of four major parts: boot, frame, bearing and wheel, and the most important part among those for necessary functionality is the frame. It is the most expensive, and it also makes a decisive role in practical race skating. The functional behavior of a frame is greatly affected by external dynamic forces as well as the static weight of a skater. We are proposing a new inline speed-skating frame design that has been improved in structural strength and weight for providing optimum speed in 20-40km marathon skating.
지해성 한국공학교육학회 2013 공학교육연구 Vol.16 No.3
The paper addresses an issue of industry-joint engineering education paradigm with the purpose of setting a new standard for engineering education by development and support of competitive curriculum for the interdisciplinary team-based product development, a specialized and innovative engineering education program. In the department of MSDE(Mechanical and System Design Engineering), students are educated via three major courses for targeting engineering design, Creative Engineering Design (freshman), Design Process (Senior), and Creative Product Development (Junior). All these courses are based on personal tool exercises for design software and hardware and team-project group activities of the students with other team members. This paper will briefly discuss the main focuses of these courses and case studies of the teaching results targeting the development of telecommunication device.
池海成,鄭海鎔 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-
Rapid prototyping (RP) technologies have an ability of creating a physical part directly from its computer model by adding material on a layer by layer basis. Since actual production of a physical model using traditional techniques has been quite expensive, a prototyping apparatus like Stereolithography can recently be used to get physical verification of a product design rapid and economic. In spite of this tremendous progress in fabrication, many problems remain unsolved including several geometric issues that must be resolved in coming years before these technologies are in common use. The biggest problem lies in their standard file format for CAD data exchange. Current method using the de facto industry standard STL data format have at times resulted in problems such as accuracy, redundancy, and integrity in its representing CAD models. In this paper, a general explanation about why a next generation of data exchange standard for RP technologies is needed, why it must be based on a solid model, and what its major advantages are given.
Software supports and E-manufacturing for DMT process
지해성,Jeonghun Suh 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.10
The working principle of the laser-aided direct metal tooling(DMT) process is the use of a laser to selectively clad metallic powder on the substrate material part. A high-powered laser beam is focused on a metal substrate to create a molten weld pool; as the laser passes by the deposit is quickly cooled, leaving behind a thin line of metal clad. The major advantage of the DMT process is its capability of depositing a multitude of materials. Since the material deposition relies only on the feeding of a powder, it is relatively simple to use multiple kinds of materials. In fact, recent research has shown that DMT is capable of manufacturing binary functionally graded materials as well. The study is to develop a software support tool, visual simulation technique, as one of the e-manufacturing capability established for a unique DMT process.