Erratum: ‘‘Long term stability in the operation of a chemical oxygen-iodine laser for industrial use’’ [J. Appl. Phys. <b>6</b>
                  <b>6</b>, 1033 (1989)]

Fujii, Hiroo; Yoshida, S.; Iizuka, Masachiro; Atsuta, Toshio

doi:10.1063/1.344034

Cited by 5 publications

(5 citation statements)

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“…8 Long duration, high power industrial COIL operation has been addressed in several papers. [9][10][11][12][13][14] General issues associated with the industrialization of COIL were discussed by Scott and Truesdell. 15 Recently, COIL cutting data has appeared in the literature.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of cutting thick aluminum and steel with a chemical oxygen–iodine laser using an N2 or O2 gas assist

Carroll

Rothenflue

1997

Journal of Laser Applications

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A chemical oxygen-iodine laser (COIL) was used for cutting aluminum and carbon steel. Cut depths of 20 mm were obtained in aluminum and 41 mm in carbon steel using an N 2 gas assist and 5-6 kW of power on target. The same laser at the same power level produced a cut depth of 65 mm in carbon steel with an O 2 gas assist; a low quality cut to a depth of nearly 100 mm in carbon steel was demonstrated. These data are compared with existing COIL and CO 2 laser cutting data. COIL cuts carbon steel and stainless steel at approximately the same rate. For a given cut depth, power and spot size, COIL cuts steel approximately three times faster than a CO 2 laser using an inert gas assist. COIL cutting speeds in carbon steel are improved by approximately a factor of three when an O 2 assist is used in lieu of an N 2 gas assist. With an N 2 gas assist, COIL cuts aluminum at approximately the same rate as CO 2 cuts steel. To improve the agreement between data and an existing theoretical cutting model, an empirical correction factor was added to the model; this modification provides excellent agreement with data.

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Section: Introductionmentioning

confidence: 99%

Experimental study of cutting thick aluminum and steel with a chemical oxygen–iodine laser using an N2 or O2 gas assist

Carroll

Rothenflue

1997

Journal of Laser Applications

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“…This device used compact, rotating-disk, wetted-wall chemical reactors to generate large quantities of singlet delta oxygen, and then mixed the oxygen with iodine using a stacked supersonic nozzle array. 3 Fujii et al [4][5][6] at Kawasaki Heavy Industries, Ltd., in Japan demonstrated the operation of a COIL for long durations with the operation of a 1 kW subsonic gas flow COIL for 2 h. At the Phillips Laboratory, sustained high-power operation of a supersonic COIL was demonstrated with operation at 9 kW for 2 min 7 and at 430 W for 13 min on a compact COIL test stand. 8 Further details on COIL development and on the theoretical operation of COIL can be found Truesdell et al 2 and Avizonis and Truesdell, 9 respectively.…”

Section: A Coil Developmentmentioning

confidence: 99%

Effects of mode structure on three-dimensional laser heating due to single or multiple rectangular laser beams

Kantor

Scott²,

Latham³

1996

Journal of Applied Physics

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The natural shape of a typical chemical oxygen-iodine laser ͑COIL͒ beam is rectangular which means that the transverse cross section of the beam is rectangular. Such a rectangular beam can be split into two or more beams to carry out materials processing. The distance between such beams and the mode structure in the beams can affect the distribution of heat in the workpiece. This, in turn, affects the quality and efficiency of materials processing. A three-dimensional quasi-steady-state thermal model is presented in this article, and an expression for the temperature distribution during laser heating with single or multiple COIL beams having rectangular spots is obtained. Calculations are carried out for single or two rectangular COIL beams. The depth of heating is found to increase when the distance between two beams is less than a certain value.

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“…Meanwhile, research towards making COIL an industrial device began in the latter half of the 1980's [9]. Long duration, high power industrial COIL operation was addressed in several papers [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

<title>Cutting performance of a chemical oxygen-iodine laser on aerospace and industrial materials</title>

et al. 2000

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A chemical oxygen-iodine laser (COIL) was used for cutting aluminum, titanium,inconel and copper plates. The laser was operated with a stable resonator having an intracavity aperture to produce a circular COIL beam with very few transverse modes. The multimode focal spot diameter was calculated to be 0.24 mm. The new aluminum cut was of particularly high kerf edge quality. These COIL cutting data are compared with an existing theoretical laser cutting model. Using thermophysical data for aluminum, titanium, inconel and copper, this theory agrees very well with the data. To test the versatility ofthe model, the effects of different assumptions are examined; different assumptions produced very little effect on model predictions at high cutting speeds and a small difference at very slow cutting speeds. Overall, the theoretical model provides good agreement with experiments for a wide variety of metals.

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Erratum: ‘‘Long term stability in the operation of a chemical oxygen-iodine laser for industrial use’’ [J. Appl. Phys. 6 6, 1033 (1989)]

Cited by 5 publications

References 0 publications

Experimental study of cutting thick aluminum and steel with a chemical oxygen–iodine laser using an N2 or O2 gas assist

Experimental study of cutting thick aluminum and steel with a chemical oxygen–iodine laser using an N2 or O2 gas assist

Effects of mode structure on three-dimensional laser heating due to single or multiple rectangular laser beams

<title>Cutting performance of a chemical oxygen-iodine laser on aerospace and industrial materials</title>

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