• Title/Summary/Keyword: 정밀 절단

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Influence of Cutting Pressure on Laser Cut Quality (Relationship between Cutting Pressure and Cut Quality) (레이저 절단품질에 미치는 절단압력의 영향(2) (절단압력과 절단품질간의 상관관계))

  • Yang, Yeong-Su;Na, Seok-Ju;Kim, Won-Bae;Kim, Tae-Gyun
    • Journal of the Korean Society for Precision Engineering
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    • v.5 no.1
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    • pp.63-70
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    • 1988

  • Laser cutting system uses a gas jet to remove the molten or varpozed material from the workpiece. The quality of the laser cut can be strongly influenced by the gas flow charac- teristics formed through the nozzle. Laser cutting experiments were carried out for SS41 and SUS 304 to investigate the relationship between cut quality and cutting pressure. The cutting speed, nozzle pressure and nozzle to workpiece distance were also considered. The cut specimens were inspected by various manners such as dross observation, surface roughness test and kerf width measurement. Based on the data of pressure measurement on workpiece and the results of cut surface inspection, the influence of the considered cutting conditions on cut quality could be evaluated. The results of this study will be valuable in planning the optimal laser cutting process and in designing the laser cutting nozzle.

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A Study on the Prediction of the Kerf Width Geometry and the Heat-affected zone in laser Cutting of the alloy Tool Steels(STD11) (합금공구강(STD11)의 레이저 절단에서 절단폭 형상 예측과 열 영향부에 관한 연구)

  • Cho, Y.M.;You, U.J.;Kim, J.D.
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.10
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    • pp.130-137
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    • 1995

  • With the rapid growth of the die and mold, the new die making method has been developed. Especially, the laser is very useful, because it has a very fast cutting speed and is possible to manufacture complicated geometry. The quality of the laser cut is to be evaluated with respect to some characteristic quality parameters such as kerf width geometry, roughness and heat affected zone. This paper describes the laser cut characteristic(heat-affected zone) of the alloy tool steels(STD11) and the prediction of the kerf width genmetry by the FEM. On using the oxidation heat and laser beam, the prediction of kerf geometry is more accurate than that only by the laser beam. After laser cutting, the heat-affected zone is generated on the cutting cross section. The magnitude of hardness on the cutting cross section was similar to that of the heat treatment. It was possible to predict heat-affected zone by using the FEM program.

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Cutting Characteristics of Quartz by Abrasive Waterjet (연마제 워터 제트에 의한 쿼츠의 절단특성)

  • Chung, Nam-Yong;Jin, Yun-Ho
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.2
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    • pp.118-126
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    • 2005

  • Abrasive waterjet (AWJ) cutting is an emerging technology for precision cutting of difficult-to-machining materials with the distinct advantages of no thermal effect, high machinability, high flexibility and small cutting forces. This paper investigated theoretical and experimental cutting characteristics associated with abrasive waterjet cutting of quartz GE214. It is shown that the proper variations of several cutting parameters such as waterjet cutting pressure, cutting speed and cutting depth improve the roughness on workpiece surfaces produced by AWJ cutting. From the experimental results by AWJ cutting of quartz GE214, the optimal cutting conditions to improve the surface roughness and precision were proposed and discussed.

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