Characterization of the melt removal rate in laser cutting of thick-section stainless steel

C. Wandera, Veli Kujanpää

    Research output: Contribution to journalArticleScientificpeer-review

    41 Citations (Scopus)

    Abstract

    The efficiency of the laser cutting process depends on both the rate of melting and rate of melt removal from the cut kerf. The depth of flow separation and the dross attachment on the lower cut edge relate to the efficiency of the melt removal process and can be used to characterize the rate of melt removal from the cut kerf. The melt flow velocity and melt film thickness are formulated in this study by consideration of the fundamentals of viscous incompressible fluid flow. The calculated melt flow velocity and melt film thickness are correlated with the depth of flow separation on the 10 mm stainless steel AISI 304 (EN 1.4301) laser cut edge. The effects of process parameters—including assist gas pressure, nozzle diameter, nozzle standoff, focal point position, and cutting speed—on the depth of flow separation and the dross attachment on the lower cut edge are investigated. The assist gas pressure, nozzle diameter, and focal point position are found to significantly affect the efficiency of melt removal from the cut kerf.
    Original languageEnglish
    Pages (from-to)62-70
    Number of pages9
    JournalJournal of Laser Applications
    Volume22
    Issue number2
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    laser cutting
    Stainless Steel
    flow separation
    Flow separation
    stainless steels
    Stainless steel
    nozzles
    Nozzles
    Lasers
    Flow velocity
    gas pressure
    attachment
    Film thickness
    film thickness
    flow velocity
    Gases
    incompressible fluids
    fluid flow
    Flow of fluids
    Melting

    Keywords

    • flow separation
    • laser bearn cutting
    • nozzles
    • stainless steel

    Cite this

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    title = "Characterization of the melt removal rate in laser cutting of thick-section stainless steel",
    abstract = "The efficiency of the laser cutting process depends on both the rate of melting and rate of melt removal from the cut kerf. The depth of flow separation and the dross attachment on the lower cut edge relate to the efficiency of the melt removal process and can be used to characterize the rate of melt removal from the cut kerf. The melt flow velocity and melt film thickness are formulated in this study by consideration of the fundamentals of viscous incompressible fluid flow. The calculated melt flow velocity and melt film thickness are correlated with the depth of flow separation on the 10 mm stainless steel AISI 304 (EN 1.4301) laser cut edge. The effects of process parameters—including assist gas pressure, nozzle diameter, nozzle standoff, focal point position, and cutting speed—on the depth of flow separation and the dross attachment on the lower cut edge are investigated. The assist gas pressure, nozzle diameter, and focal point position are found to significantly affect the efficiency of melt removal from the cut kerf.",
    keywords = "flow separation, laser bearn cutting, nozzles, stainless steel",
    author = "C. Wandera and Veli Kujanp{\"a}{\"a}",
    year = "2010",
    doi = "10.2351/1.3455824",
    language = "English",
    volume = "22",
    pages = "62--70",
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    number = "2",

    }

    Characterization of the melt removal rate in laser cutting of thick-section stainless steel. / Wandera, C.; Kujanpää, Veli.

    In: Journal of Laser Applications, Vol. 22, No. 2, 2010, p. 62-70.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Characterization of the melt removal rate in laser cutting of thick-section stainless steel

    AU - Wandera, C.

    AU - Kujanpää, Veli

    PY - 2010

    Y1 - 2010

    N2 - The efficiency of the laser cutting process depends on both the rate of melting and rate of melt removal from the cut kerf. The depth of flow separation and the dross attachment on the lower cut edge relate to the efficiency of the melt removal process and can be used to characterize the rate of melt removal from the cut kerf. The melt flow velocity and melt film thickness are formulated in this study by consideration of the fundamentals of viscous incompressible fluid flow. The calculated melt flow velocity and melt film thickness are correlated with the depth of flow separation on the 10 mm stainless steel AISI 304 (EN 1.4301) laser cut edge. The effects of process parameters—including assist gas pressure, nozzle diameter, nozzle standoff, focal point position, and cutting speed—on the depth of flow separation and the dross attachment on the lower cut edge are investigated. The assist gas pressure, nozzle diameter, and focal point position are found to significantly affect the efficiency of melt removal from the cut kerf.

    AB - The efficiency of the laser cutting process depends on both the rate of melting and rate of melt removal from the cut kerf. The depth of flow separation and the dross attachment on the lower cut edge relate to the efficiency of the melt removal process and can be used to characterize the rate of melt removal from the cut kerf. The melt flow velocity and melt film thickness are formulated in this study by consideration of the fundamentals of viscous incompressible fluid flow. The calculated melt flow velocity and melt film thickness are correlated with the depth of flow separation on the 10 mm stainless steel AISI 304 (EN 1.4301) laser cut edge. The effects of process parameters—including assist gas pressure, nozzle diameter, nozzle standoff, focal point position, and cutting speed—on the depth of flow separation and the dross attachment on the lower cut edge are investigated. The assist gas pressure, nozzle diameter, and focal point position are found to significantly affect the efficiency of melt removal from the cut kerf.

    KW - flow separation

    KW - laser bearn cutting

    KW - nozzles

    KW - stainless steel

    U2 - 10.2351/1.3455824

    DO - 10.2351/1.3455824

    M3 - Article

    VL - 22

    SP - 62

    EP - 70

    JO - Journal of Laser Applications

    JF - Journal of Laser Applications

    SN - 1042-346X

    IS - 2

    ER -