• Title, Summary, Keyword: 쾌속금형제작기술

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Development of Rapid Tooling Processes Based on Three-Dimensional CAD/CAM (3차원 CAD/CAM 기반 초단납기 금형제작기술 개발)

  • Ahn, J. H.;Park, K.;Kim, C. K.;Park, B. C.;Choi, S. R.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.3-6
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    • 2001
  • The present work concerns rapid tooling technology based on three-dimensional CAD/CAM. Two types of tooling processes have been introduced : the quick delivery molding(QDM) process and the rapid tooling(RT) process using a rapid prototyping system. Both processes are based on three-dimensional CAD/CAM technology and realize a paperless manufacturing system with a high efficiency. The proposed approach has been applied to the product development for various electrical parts, and the final delivery has been reduced as compared with the traditional approach.

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Analysis on the Characteristics of Micro Cutting Process for DMLS Mold Material (DMLS 금형강의 미세 절삭가공 특성 분석)

  • Yoon, Gil-Sang;Kim, Gun-Hee;Lee, Jeong-Won;Kim, Jong-Deok
    • Proceedings of the KAIS Fall Conference
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    • pp.518-520
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    • 2011
  • 금속분말 쾌속조형법의 한 종류인 DMLS 공정은 사출성형품의 균일한 냉각이 가능한 3차원 냉각시스템을 포함한 코어, 캐비티 제작이 가능하다. 그러나, 코어 및 캐비티 내 미세형상의 경우 DMLS로 제작하기에는 난해하므로 별도 미세 절삭가공을 통해 제작할 필요가 있다. 따라서, 본 연구에서는 DMLS금형강 소재의 미세 절삭가공 특성을 분석하고자 하였으며, 이를 위하여 HIP 공정 적용 전 후 DMLS금형강 소재를 대상으로 미세 절삭가공 실험을 수행하고 버 발생 및 공구마모 경향을 분석하였다. 실험 결과 HIP 적용 전 시편이 강도 및 조직측면에서 미세 절삭가공에 상대적으로 유리함을 확인할 수 있었다.

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A Study of Rapid Tooling of Porous Metal Mold (통기성 금형의 쾌속제작에 관한 연구)

  • 김경래;정성일;정해도;이석우;최헌종;박영진;박장식
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.1
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    • pp.91-98
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    • 2003
  • Removal of gas in a mold has been a big problem in pressing mold or in injection mold. Air vent has been used to solve the problem, but it has weak points such as the increased cost, the increased number of process, and vent marks on the surface of a product. In this study, the sintering method and rapid tooling method are used for making porous metal mold. Porous metal mold has many open pores, which are very small. When porous metal mold is used for pressing mold or injection mold, all process would be made short, produce cost would be down, and vent marks would be not leaved on the surface of a product. Characteristic of porous material varies from sintering conditions, which are the length of sintering time, sintering temperature and sintering atmosphere etc. This study will find optimized sintering condition for the porous metal mold.

Rapid Tooling Technology for Producing Functional Prototypes using Ceramic Shell Investment Casting and Patterns Produced Directly from ThermoJet 3D Printer (ThermoJet 3D 프린터로 직접 제작한 패턴과 세라믹쉘 주조법을 이용한 기능성 시제품의 쾌속제작)

  • Kim Ho-Chan;Lee Seok;Lee Seok-Hee
    • Journal of the Korean Society for Precision Engineering
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    • v.23 no.8
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    • pp.203-210
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    • 2006
  • This paper focuses on the development of RT technology suitable for manufacturing a small quantity of metal prototype of a precise part from an RP master. Dimensional accuracy and surface roughness are evaluated from Thermojet part of a 3D printer, and effective post-processing method is introduced. Investment casting is done using a prototype built from 3D printer as a wax pattern. Ceramic shell investment casting technique is developed to build a prototype with materials mostly wanted. Also, experimental result shows this research is very useful in manufacturing of a small quantity of functional part or a test part of a specific material.

Die Making and Product Prototype Fabrication in Investment Casting by SLA Rapid Prototyping Technique (급속조형기술을 이용한 쾌속정밀주조 금형 및 시제품 제작)

  • Park, Moon-Sun;Kim, Dae-Hwan;Kwak, Jeong-Gi;Hwang, Sang-Moon;Kang, Beom-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.11
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    • pp.74-80
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    • 1999
  • In this study, a stereolithography apparatus (SLA) prototype is used as a master model to be transformed into the silicone pattern by vacuum tool forming. The tool for the first prototype is fabricated by using this silicone pattern. Following this procedure, a temporary tool with metal powder and epoxy for wax injection is prepared for the die set of quick change type which consists of upper and lower base die나 and an insert die. The die set of quick change type appears to be very effective in casting operation by changing tools rapidly. The original wax pattern is formed through the die set, and is made of lost-was. Finally the lost-wax pattern is applied to investment casting. The final casting product is checked regarding its dimensional accuracy.

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Development of Rapid Tooling Technology for Shoe Mold and Its Applications (신발 금형의 쾌속제작기술 개발 및 그 적용에 관한 연구)

  • Chung, Sung-Il;Im, Yong-Gwan;Jeong, Hae-Do;Jeong, Du-Su;Bae, Tae-Yong;Lee, Seok-Woo;Choi, Han-Zong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.8
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    • pp.1371-1379
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    • 2003
  • RP&M (Rapid Prototyping and Manufacturing) is the most appropriate technology for the small-lot production system, because the production cycle is getting shorter owing to various needs of the consumer. In this paper, rapid tooling technology is applied to the casting process. The casting process has the ability to reflect complicated shapes in one process. But it has not been widely used to make a die and mold because of the poor surface quality caused by air bubbles on the surface of the casting product. In this study, the porous casting mold is fabricated from a mixture of plaster and water-soluble binder. The porous casting mold can improve the characteristics of casting products with the help of the vacuum sealed casting process. The vacuum sealed casting process is an advanced technology that removes the air bubbles between the porous casting mould and the liquid metal, thus making the surface of the casting product finer. The purpose of this paper is to develop a high quality shoe mold using porous casting mold and to apply the RP&M technology to the shoe industry.

Die Manufacturing and Repair Using Laser-Aided Direct Metal Manufacturing (레이저 직접금속조형(DMM)기술에 의한 금형제작 및 보수)

  • 지해성;서정훈
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.104-107
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    • 2002
  • Direct Metal Manufacturing (DMM) is a new additive process that aims to take die making and metalworking in an entirely new direction. It is the blending of five common technologies : lasers, computer-aided design (CAD), computer-aided manufacturing (CAM), sensors and powder metallurgy. The resulting process creates parts by focusing an industrial laser beam onto a tool-steel work piece or platform to create a molten pool of metal. A small stream of powdered tool-steel metal is then injected into the melt 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 built line-by-line, one layer at a time. DMM produces improved material properties in less time and at a lower cast than is possible with traditional fabrication.

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