• Title/Summary/Keyword: 5축 가공

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A study on 5-axis Milling Machine for Micro System Manufacturing (마이크로 시스템 구현을 위한 5축 가공기에 관한 연구)

  • 방영봉;이경민;오승률
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.585-588
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    • 2003
  • As the advance in technology requires micro mechanical systems, the production methods for micro parts are of a great interest of many researchers. Although MEMS is one of the most popular methods. it can only produce 2D microstructures. The micro manufacturing with micro-mill and micro-lathe has a great potential for producing arbitrary 3D shapes and are being researched. In this paper, a PC based 5-axis milling machine with high precision was developed. To evaluate the machine performance, micro ribs and micro columns were machined. The machining experiments of micro impeller and micro turbine blade confirmed the possibility of micro system manufacturing by using the developed milling machine.

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A Study on Five-Axis Roughing of Impeller with Ruled Surface (룰드 곡면으로 된 임펠러의 5축 황삭 가공에 관한 연구)

  • Jang, Dong-Kyu;Lim, Ki-Nam;Yang, Gyun-Eui
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.7 s.196
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    • pp.60-68
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    • 2007
  • This paper presents an efficient 5-axis roughing method for centrifugal impeller. The efficient roughing is minimization of cutting time through minimizing tool tilting and rotating motions. To minimized cutting time, machining area is divided into sub-cutting regions using control points on hub curves and shroud curves of blade used to design and analyze centrifugal impeller. For sub-cutting regions, diameters of cutting tools are determined as big as possible. Then, tool paths are generated with the tilting axis and rotating axis of 5-axis machine limited and fixed, which can give more efficient machining speed and machining stability than the conventional methods. Experimental results show that the proposed method is more efficient than the conventional methods to mill with the only one cutting tool without dividing area and the previous methods to mill with simultaneous 5-axis processing with dividing area.

A study on the development of rapid prototyping system using 5 axis machining (5축 가공을 이용한 쾌속조형 시스템의 개발)

  • 정태성;양민양
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.10a
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    • pp.1011-1014
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    • 2002
  • In order to reduce the lead-time and cost, many useful methods have been applied to Rapid Prototyping (RP) in recent years. But cutting process is still considered as one of the effective RP methods that have been developed and currently available in the industry. It also owen practical advantages such as precision and versatility. However, traditional 3 axis NC machining has some inherent limitations such as the restriction of tool accessibility and the complex setup. In this work, a new rapid prototyping system with high speed 5 axis machining has been developed to overcome those limitations. The architecture of developed system is described in detail and the successful application examples are presented.

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A Study on Tool Path Generation for Machining Impellers with 5-Axis Machining Center (5축 Machining Center를 이용한 임펠러 가공을 위한 공구경로 생성에 관한 연구)

  • 장동규;조환영;이희관;공영식;양균의
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.3
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    • pp.83-90
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    • 2004
  • This paper proposes a tool path generation method for machining impellers with 5-axis machining center. The shape of impeller is complex, being composed of pressure surface, suction surface and leading edge, and so on. The compound surface which is made of ruled surface such as pressure surface and suction surface and leading edge such as fillet surface, makes the tool path generation much complicated. To achieve efficient roughing, cutting area is divided into two region and then tool radius of maximum size that do not cause tool intereference is selected for shortening machining time. In finishing, accuracy is improved using side cutting for blade surface and point milling for leading edge.

A Study on the Structural Stability of Nozzle Manufactured with 5-axis Machining (5축 가공으로 제작한 노즐의 구조 안정성에 관한 연구)

  • Changwook Lee;Yongseok Park;DuckYong Jo;Seong Man Choi
    • Journal of the Korean Society of Propulsion Engineers
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    • v.26 no.5
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    • pp.44-51
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    • 2022
  • In this study, 5-axis machining was proposed as a method for manufacturing a nozzle with a curved shape, and flow analysis and structural analysis were used for structural validation of the manufactured geometry. The program used for CFD obtained the internal temperature and pressure distribution of the nozzle using STAR-CCM+ and used it as the boundary condition for structural analysis. For structural analysis, the commercial program NASTRAN was used, and stress was calculated using the von-mises technique. Based on the maximum stress value generated, the safety margin was 0.78 and the safety margin of the bearing stress was 46.8. In addition, the creep life was calculated as 9.97 x 1012 hours using the Larson-Miller parametric method and applying the maximum stress value of 187 MPa and the exhaust gas perfectly mixed temperature of 463 K.

Convergent Study of Personalized Modeling and 5-Axis Machining Technology Using Patellofemoral Bone DICOM Image (넙다리무릎뼈 의료용 디지털 영상 및 통신 표준 영상을 이용한 맞춤형 모델링과 5축 가공기술의 융합적 연구)

  • Yoon, Jae-Ho;Kim, Hyeong-Gyun
    • Journal of the Korea Convergence Society
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    • v.9 no.11
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    • pp.137-143
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    • 2018
  • DICOM images of patellofemoral bones were converted into a stereolithography file, and a Unigraphics CAD program was used to create a CAD modeling in which there exists point, line and facet information. The modeling extraction of joint facets was performed by linking two adjacent points into lines in the stereolithography file by using the Unigraphics rapid spacing function and then linking the lines into facets to complete the entire modeling. This modeling extraction was performed based on the anatomical knowledge of joint facet directions. As a result, a personalized space modeling and solid modeling were produced for the joint facets of patellofemoral bones. This was followed by a CAM control computing operation of solid modeling on graphite materials and 5-axis machining of patellofemoral bones. That is the description of a method for a personalized implant modeling by using DICOM images of patellofemoral bones.

Development of Five Axis Laser Cutting System for the Tangent Cutting Solid Freeform Fabrication System (임의형상가공시스템을 위한 레이저 5축 경사절단기 및 궤적생성 알고리즘의 개발)

  • 주영철;엄태준;이차훈;공용해;천인국;김승우;방재철
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.4 no.1
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    • pp.1-6
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    • 2003
  • A novel Solid Freeform Fabrication System, which makes prototype by cutting tapes at the boundary of object and accumulating the tapes, has been developed. In order to overcome the staircase shape at the surface of prototype, the laser beam is irradiated tangent to the surface. Five axis cutting system and the tangent cutting trajectory generation algorithm have been developed.

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