• Title/Summary/Keyword: 형상 엔드밀

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A Study on Machining Electrode for LED Mold with Shaped End-Mill (형상 엔드밀 공구를 이용한 LED금형의 방전전극 가공에 관한 연구)

  • Kim, Hyeong-Chan;Lee, Hui-Gwan;Hwang, Geum-Jong;Gong, Yeong-Sik;Yang, Gyun-Ui
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.10
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    • pp.187-194
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    • 2002
  • A study on machining electrode for LED (Light Emitted Diode) mold with shaped end-mill is presented. The electrode machining by shaped end-mill has been used for maximizing the productivity in manufacturing semiconductor mold. However, it has not been researched systematically for many difficulties such as the making of shaped end-mill, generation of tool path due to distinctive tool geometry, and so on. Tool path is generated on geometry of the shaped end-mill and cutting force to provide accurate and efficient machining of electrode. The verification program can drive enhancement of productivity, selecting cutting conditions from experiment function of cutting force. Also, compensation of tooling and maching error can make the electrode accurately by modifying tool path. Therefore, the research on machining with shaped end-mill can contribute to enhancement of accuracy and productivity in building semiconductor mold.

Prediction of Surface Topography by Dynamic Model in High Speed End Milling (고속 엔드밀 가공시 동적 모델에 의한 표면형상 예측)

  • Lee, Gi-Yong;Ha, Geon-Ho;Gang, Myeong-Chang;Lee, Deuk-U;Kim, Jeong-Seok
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.7 s.178
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    • pp.1681-1688
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    • 2000
  • A dynamic model for the prediction of surface topography in high speed end milling process is developed. In this model the effect of tool runout, tool deflection and spindle vibration were taken in to account. An equivalent diameter of end mill is obtained by finite element method and tool deflection experiment. A modal parameter of machine tool is extracted by using frequency response function. The tool deflection, spindle vibration chip thickness and cutting force were calculated in dynamic cutting condition. The tooth pass is calculated at the current angular position for each point of contact between the tool and the workpiece. The new dynamic model for surface predition are compared with several investigated model. It is shown that new dynamic model is more effective to predict surface topography than other suggested models. In high speed end milling, the tool vibration has more effect on surface topography than the tool deflection.

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

  • Jung, Hong-Il;Kong, Jeong-Ri;Kim, Hae-Ji
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.21 no.3
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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.

Evaluation on Shape Machining of Dies and Molds in High speed Machining using Ball-End Milling (볼 엔드밀을 이용한 고속가공에서 금형제품의 형성가공 특성파악)

  • 김경균;강명창;김정석
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.143-146
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    • 1995
  • Due to the recent growth of die/mold machining industry, demands for the high-precision and the high0quality of die product are increasing rapidly. Free surfaces of die/mold are often manufactured using the ball-end milling process. It is difficult to find the cutting condition of the ball-end milling process due to the free form machining for the various tool paths on inclined surface.

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Machining Characteristics in High Speed Endmill Operation Considering Clearance Angle (엔드밀 가공 시 여유각을 고려한 가공특성)

  • 박정남;고성림
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.8
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    • pp.43-49
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    • 2004
  • The objective of this research is to investigate the effect of clearance angle on cutting performance in high speed end milling operation. The tool geometry parameters have complex relationship with cutting process parameter. In order to explain the effect of clearance angle, 2D turning operation in lathe and end milling operations are performed. Tools with different clearance angles are manufactured. Cutting forces, machining accuracy and tool life are examined according to the change of clearance angle. As clearance angle increases, cutting force decreases and machining accuracy improves. But it has been proved that there exists the optimal clearance angle according to the diameter of end mill for maximum tool life which is measured by frank wear.

The Prediction of Cutting Force and Surface Topography by Dynamic Force Model in End Milling (엔드밀 가공시 동적 절삭력 모델에 의한 절삭력 및 표면형상 예측)

  • 이기용;강명창;김정석
    • Journal of the Korean Society for Precision Engineering
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    • v.14 no.4
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    • pp.38-45
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    • 1997
  • A new dynamic model for the cutting process inb the end milling process is developed. This model, which describes the dynamic response of the end mill, the chip load geometry including tool runout, the dependence of the cutting forces on the chip load, is used to predict the dynamic cutting force during the end milling process. In order to predict accurately cutting forces and tool vibration, the model which uses instantaneous specific cutting force, inclueds both regenerative effect and penetration effect, The model is verified through comparisons of model predicted cutting force with measured cutting force obtained from machining experiments.

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Development of Design and Manufacturing Technology for Endmills (엔드밀 설계 및 제작 기술에 관한 연구)

  • 고성림;김용현
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.69-72
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    • 2002
  • The geometry parameter of tool such as rake angle and clearance angle is defined clearly to solve the difference in communication between design and measurement stage. Using the developed simulation program, wheel is properly determined and end mill can be manufactured accurately. The performance test with well defined end mill provides sufficient information to decide optimal geometry. For machining hardened steel, end mills are designed and manufactured. Optimal rake angle and clearance angle is obtained from performance test. A specific software for automatic end mill production is developed far simulation and fur generation of NC code as Cad/CAM system.

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