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}",
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}

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

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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

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JO - Journal of Laser Applications

JF - Journal of Laser Applications

SN - 1042-346X

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