• Title/Summary/Keyword: Micro-Die Making

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Development of Manufacturing Technology for Milli-Structure (Milli-Structure 생산기술개발)

  • 나경환;박훈재;조남선
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.05a
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    • pp.1039-1042
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    • 2000
  • This research will deal with Innovative manufacturing technology for milli-structure manufacturing technology which is located betweon the traditional manufacturing technology for macro-sized structure and the recently emerging manufacturing technology for micro-scaled structure such as MEMS. There are four fields in this research, which are micro-sheet metal forming technology, micro-bulk forming technology micro-molding technology and micro die making technology. As a project for new-technology in next generation, this research will be carried out through three terms and each term and be composed of three years.

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Micro Mold System for Functional Polymer (기능성 고분자소재 성형용 마이크로 금형 시스템)

  • Heo Y. M.;Shin K. H.;Yoon G. S.;Jung W. C.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2004.10a
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    • pp.267-270
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    • 2004
  • In Micro injection process, it is needed to the technique of making micro die, Rapid Thermal Pressing (RTP) and other techniques. Those techniques are independent. But the mutual connected system of techniques is needed. The target of this paper is the design of micro mold and the development of the entire micro injection techniques for functional polymer.

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A study on machining method about molybdenum alloy micro fixing part for TEM precision specimen. (TEM 정밀 시편 제작용 몰리브덴 합금 미세 고정 부품의 제작을 위한 절삭 가공 방법에 관한 연구)

  • Kim, Ki-Beom;Lee, Chang-Woo;Lee, Hae-Jin;Ham, Min-Ji;Kim, Gun-Hee
    • Design & Manufacturing
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    • v.11 no.3
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    • pp.19-24
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    • 2017
  • In these days, increase requirement of TEM (Transmission Electro Microscope) in not only scientific field but also industrial field. Because TEM can measure inner-structure of specimen a variety of materials like metal, bio. etc. When use TEM, specimen should be thin about 50nm. So making for thin specimen, use Ion milling device that include specimen holder. The holder generally made of Aluminium Aluminium holder is worn away easily. For this reason, using time of ion milling with aluminum holder is too short. To solve the problem, we replace aluminium holer to molybdenum alloy holder. In this paper, we design molybdenum alloy holer for CAM and modify CAD modeling for effective machining process. So we array a specimen 3 by 4 and setup orientation for one-shot machining process. Next we make a CAM program for machining. we making a decision two machining strategy that chose condition of tool-path method, step-down, step-over. etc. And then conduct machining using CNC milling machining center. To make clear difference between case.1 and case.2, we fixed machining conditions like feed-rate, main spindle rpm, etc. After machining, we confirm the condition of workpiece and analysis the problems case by case. Finally, case.2 work piece that superior than case.1 cutting with WEDM because that method can not ant mechanical effect on workpiece.

Variation of microstructures and mechanical properties of hot heading process of super heat resisting alloy Inconel 718 (초내열 합금 Inconel 718 열간 헤딩 공정에서의 조직 및 기계적 특성 변화)

  • Choi, Hong-Seok;Ko, Dae-Chul;Kim, Byung-Min
    • Proceedings of the KSME Conference
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    • 2007.05a
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    • pp.1373-1378
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    • 2007
  • Metal forming ins the process changing shapes and mechanical properties of the workpiece without initial material reduction through plastic deformation. Above all, because of hot working carried out above recrystallization temperature can be generated large deformation with one blow, it can produce with forging complicated parts or heat resisting super alloy such as Inconel 718 has the worst forgeability. In this paper, we established optimal variation of hot heading precess of the Inconel 718 used in heat resisting component and evaluated mechanical properties hot worked produce. Die material is SKD61 and initial temperature is $300^{\circ}C$. Initial billet temperature and punch velocity changed, relatively. Friction coefficient is 0.3 as lubricated condition of hot working. CAE is carried out suing DEFORM software before making the tryout part, and it is manufactured 150 ton screw press with optimal condition. It is known that forming load was decreased according to decreasing punch velocity.

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