• Title/Summary/Keyword: 고압홀더

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An Experimental Study on Cutting Process using High Pressure Injection Holder (고압 분사 홀더를 이용한 절삭가공에 대한 실험적 연구)

  • Chung, Sang-Wan;Jeong, In-Guk;Yi, Chung-Seob;Song, Chul-Ki;Suh, Jeong-Se
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.21 no.5
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    • pp.790-796
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    • 2012
  • Chip curling occurred during cutting process for difficult-to-cut material detracts product qualities and productivity. Among of method preventing the phenomenon, high pressure injecting cutting oil is an alterative. In this study, the optimal nozzle was designed by CFD method and it was conducted to analyse on the effect of high pressure injection on chip shape generated during cutting process and wear of insert by experimental method. As the result, it could be confirmed that high pressure injection is favorable for preventing chip curling and insert from wearing.

A Study on the Development of High Pressure Holder for Machining (절삭가공용 고압분사 홀더 개발에 관한 연구)

  • Yi, Chung-Seob;Jeong, In-Guk;Suh, Jeong-Se;Chung, Sang-Wan
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.6
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    • pp.55-61
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    • 2012
  • In this study, it was grasped to the flow characteristics of injection nozzle installed in high pressure holder for improving productivity. Chip curling occurred during cutting process for difficult-to-cut material detracts product qualities and productivity. Among of method preventing the phenomenon, high pressure injecting cutting oil is an alterative. In this study, the optimal nozzle was designed by CFD method and it was conducted to analyse on the effect of high pressure injection on chip shape generated during cutting process and wear of insert by experimental method. As the result, it could be confirmed that high pressure injection is favorable for preventing chip curling and insert from wearing.

A Study on Design of High Pressure Injection Nozzle for Avoiding Chip Curling (칩 말림 방지를 위한 고압 분사 노즐 설계에 관한 연구)

  • Yi, Chung-Seob;Yun, Ji-Hun;Jeong, In-Guk;Song, Chul-Ki;Suh, Jeong-Se
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.6
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    • pp.793-798
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    • 2011
  • In this study, it was grasped to the flow characteristics of cutting fluid injected by nozzle installed in high pressure holder for avoiding chip curling occurred during machining process. And for avoiding chip curling, the possibility of elimination under various chip conditions was checked. Consequently, the highest discharging pressure and velocity was shown in 150 of nozzle inflow angle. Also as nozzle outlet diameter is small, the pressure and velocity of injected flow are high. Moreover, It could be confirmed that width and thickness of chip have no direct effect on chip elimination and it is achieved by torque generated by injected cutting fluid.

Numerical Analysis of the Flow Characteristics of High-Pressure Injection Nozzle for Machine Tools (공작기계용 HP Holder 분사노즐 유동특성에 관한 수치해석)

  • Yi, Chung-Seob;Yun, Ji-Hun;Jeong, In-Guk;Song, Chul-Ki;Suh, Jeong-Se
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.35 no.10
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    • pp.1061-1066
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    • 2011
  • In this study, the flow characteristics of an injection nozzle installed in a high-pressure holder for improving productivity were determined. The inlet velocity, nozzle inflow angle, and nozzle outlet diameter were selected as design factors having an influence on the flow characteristics, and numerical analysis was conducted for these factors. As the inlet velocity is high and the nozzle outlet diameter is small, the pressure and velocity of the injected flow are high. In the case of the nozzle inflow angle, the variation of flow characteristics according to angle was slight, but the highest pressure and velocity were found at $15^{\circ}$. In addition, the possibility of chip elimination by the injected flow was analyzed on the basis of the numerical results.

Property Prediction of Rupture Disc by Using Finite Element Analysis (유한요소해석을 이용한 파열판의 특성 예측)

  • Han, Chang-Yong;Lee, Seong-Beom;Jung, Hee-Suk;Kim, Tae-Gu
    • Journal of the Korean Institute of Gas
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    • v.13 no.3
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    • pp.1-6
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    • 2009
  • High pressure devices are used widely. Interest in rupture disc to people is the increases in protect of facilities and people. A rupture disc consists of mainly three parts: holder, plate and vacuum support. Rupture discs are rusted or destroyed by diverse environments. Rupture discs are made from STS 316L stainless steel because of its high corrosion resistance and yield strength. In this study, modeling of a rupture disc by CATIA V5 and finite element analysis by ANSYS were carried out. The finite element analysis results executed to predict properties of the rupture disc with thickness and height.

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