• 제목/요약/키워드: 5-axis Shape Machining

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5축가공기를 활용한 내면 형상 가공용 최적 앵글헤드의 개발 (Development of the Optimized Angle Head for Internal Shape Machining Using Five-Axis Machine Tool)

  • 황종대;김재현;조영태;정윤교;고해주
    • 한국기계가공학회지
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    • 제14권1호
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    • pp.123-129
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    • 2015
  • In general, recent critical studies of five-axis machine have tended to center on the question of effective machining to realize complex shape parts. However, the hydrostatic bearing and journal bearing, both of which are involved in the complex process of dividing the processing of internal precision-shape machining, must be optimized. Although the angle head is designed to machine the internal shape as it approaches the inner diameter of the work piece, research on the angle head in five-axis machining has received only minimal attention in domestic industries. In this study, an angle head which is optimized for effective internal shape machining is developed. In pursuit of this purpose, 3D and 2D designs of the angle head for five-axis machining are devised. Reliability is secured through static performance tests and machining accuracy evaluations of the angle head in keeping with the machining accuracy standard of 0.2mm for hydrostatic bearings.

공구 형상 및 자세에 따른 금형 자유곡면 가공품질 향상에 관한 연구 (Improvement of Mold-Sculptured Surface Quality Based on Tool Shape and Posture)

  • 윤일우;황종대;고대철
    • 한국기계가공학회지
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    • 제20권12호
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    • pp.100-106
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    • 2021
  • This paper presents a study on the improvement of the machining quality of sculptured-surfaces of molds according to the shape and posture of the tool. In the existing 3-axis machining, the methods using the ball end-mill and radius end-mill were analyzed for various cutting patterns and compared with those of the 5-axis machining. It was observed that the 5-axis machining using a ball end-mill obtained the finest surface roughness, and for the 3-axis machining, the optimal results were obtained for the one-way machining using a radius end-mill.

기하학적 형상정보와 벡터망을 이용한 임펠러의 5축가공 (5-axis Machining of Impellers using Geometric Shape Information and a Vector Net)

  • 황종대;윤일우
    • 한국기계가공학회지
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    • 제19권3호
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    • pp.63-70
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    • 2020
  • Two rotational motions of the 5-axis machine tool maximize the degree of freedom of the tool axis vector, which improves tool accessibility; however, this lowers feed speed and rigidity, which impairs machining stability. In addition, cutting efficiency is lowered when compared with a flat end mill because typically, the ball-end mill is used when machining by rotational motion. This study increased cutting efficiency by using a corner radius flat end mill during impeller roughing. Furthermore, we proposed a fixed controlled machining of the rotary motion using geometric shape information to improve the feed speed and machining stability. Finally, we proposed a finishing tool path generation method using a vector net to increase the convenience and practicality of tool path generation. To verify its effectiveness, we compared the machining time, shape accuracy, and surface quality of the proposed method and an existing dedicated module.

복합재 하니콤 코어의 형상가공 특성에 관한 실험적 연구 (Experimental Study on Shape Machining Characteristics of Composite Honeycomb Core)

  • 한승우;김해지
    • 한국기계가공학회지
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    • 제13권4호
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    • pp.28-35
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    • 2014
  • A composite honeycomb core is widely used for lightweight aircraft materials. However, the composite honeycomb core coupled with metal-cutting machining processes does not make a very good match. This paper describes an experimental study of the shape-machining characteristics of a composite honeycomb core, in which a five-axis gantry machine is used. The experimental conditions of the offset allowance, tooling condition and feed rate were applied. The shape machining characteristics of a flat surface, a vertical surface, and a concave surface are evaluated by comparing the machining shape and burr characteristics.

편심구동장치 시제품 개발을 위한 3D프린팅-5축가공 복합기술 (Hybrid Technology using 3D Printing and 5-axis Machining for Development of Prototype of the Eccentric Drive System)

  • 황종대;양준석;윤성환;정윤교
    • 한국기계가공학회지
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    • 제15권2호
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    • pp.38-45
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    • 2016
  • Since a 5-axis machine tool has two rotary axes, it offers numerous advantages, such as flexible accessibility, longer tool life, better surface finish, and more accuracy. Moreover, it can conduct whole machining by rotating the rotary feed axes while setting the fixture at once without re-fixing in contrast to conventional 3-axis machining. However, it is difficult to produce complicated products that have a hollow shape. In contrast, 3D printing can produce an object with a complicated hollow shape easily and rapidly. However, because of layer thickness and shrinkage, its surface finish and dimensional accuracy are not adequate. Therefore, this study proposes hybrid technology by integrating the advantages of these two manufacturing processes. 3D printing was used as the additive manufacturing rapidly in the whole body, and 5-axis machining was used as the subtractive manufacturing accurately in the joining and driving places. The reliability of the proposed technology was verified through a comparison with conventional technology in the aspects of processing time, surface roughness. and dimensional accuracy.

임펠러의 5축 CAM 자동화 모듈(E-ICAM)의 개발 (모듈 구성에 관한 연구) (Development of CAM Automation Module(E-ICAM) for 5-axis Machining of Impeller (A Study on Configuration of Module))

  • 정현철;황종대;정윤교
    • 한국기계가공학회지
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    • 제10권4호
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    • pp.109-114
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    • 2011
  • An impeller is difficult to machine because of severe collision due to the complex shape, overlapping and twisted shape that form impeller blades. So, most CAM software companies have developed CAM module for manufacturing impeller in addition to their CAM software. But it is not still easy for inexperienced users to machine impellers. The purpose of this paper is the development of automatic CAM module for manufacturing impeller(E-ICAM) which is based on visual basic language and it is used CATIA graphical environment in order to be easily machining impellers. Automatic CAM module for manufacturing of impellers generates tool path, and proposes recommended cutting condition according to the material of stock and tool. In addition, it has also included a post processor for 5-axis control machining. Therefore the user can easily machine impellers using this automation module.

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

  • 장동규;조환영;이희관;공영식;양균의
    • 한국정밀공학회지
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    • 제21권3호
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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.

터빈블레이드의 5축 고속가공에서 최적가공경로의 선정 (Evaluation of Cutter Orientations in 5-Axis High Speed Milling of Turbine Blade)

  • 임태순;이채문;김석원;이득우
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2002년도 금형가공 심포지엄
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    • pp.53-60
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    • 2002
  • Recently, the development of aerospace and automobile industries brought new technological challenges, related to the growing complexity of products and new geometry models. High speed machining using 5-Axis milling machine is widely used for 3D sculptured surface parts. 5-axis milling of turbine blade generates the vibration, deflection and twisting caused from thin and cantilever shape. So, the surface roughness and the waviness of workpiece are not good. In this paper, The effects of cutter orientation and lead/tilt angle in 5-Axis high speed ball end-milling of turbine blade were investigated to improve the geometric accuracy and surface integrity. The experiments were performed at lead/tilt angle $15^{\circ}$ of workpiece with four cutter directions such as horizontal outward, horizontal inward, vertical outward, and vertical inward. Workpiece deflection, surface roughness and machined surface were measured with various cutter orientations such as cutting direction, and lead/tilt angle. The results show that when 5-axis machining of turbine blade, the best cutting strategy is horizontal inward direction with tilt angle. The results show that when 5-axis machining of turbine blade, the best cutting strategy is horizontal inward direction with tilt angle.

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문형 5축 머시닝센터의 기하학적 오차해석 및 가상가공 시스템 개발 (Development of a Geometric Error Analysis and Virtual Manufacturing System for Gantry-Type 5-Axis Machining Centers)

  • 윤태선;조재완;김석일;곽병만
    • 한국정밀공학회지
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    • 제15권10호
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    • pp.172-179
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    • 1998
  • To quickly determine the effect of the substitute component on the machine's performance is very important in the design and manufacturing processes. And minimizing machine cost and maximizing machine quality mandate predictability of machine accuracy. In this study, in order to evaluate the effects of the component's geometric errors and dimensions on the machining accuracy of gantry-type 5-axis machining centers, a geometric error analysis and virtual manufacturing system are developed based on the mathematical model for the shape generation motion of machine tool considering the component's geometric errors and dimensions, the solid modeling techniques and so on.

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티타늄합금 단조 형상의 5축 가공 특성에 관한 연구 (Five-axis Machining Characteristics of Titanium Alloy Forging Shape)

  • 정홍일;공정리;김해지
    • 한국기계가공학회지
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    • 제21권3호
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    • pp.92-99
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    • 2022
  • Owing to the excellent corrosion resistance of titanium alloys, they are widely used as materials for aircraft components. However, in terms of machining, dimensional deformation methods vary significantly, such as forging, owing to their difficult-to-cut property and the uncontrollable vibration generated during machining. A method to minimize the vibration generated during machining by applying advanced tools and controlling the sequence of machining processes, which can improve the machinability and precision of titanium alloy-forged low-angle components, is proposed herein. Using the proposed tool and based on a process order experiment, the efficiency of the machining process is verified by measuring the dimensional deformation of the low-angle component.