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- W2170490738 abstract "Andre Schneider, Andrey Gumenyuk and Michael RethmeierThe presented apparatus enables laser beam welding of thick materials under local reduced pressure conditions, thus improving the quality of welds and re-ducing the laser beam power necessary for complete penetration welding. The vacuum cap presented in this article uses a local reduced ambient pressure environment in a tight zone around the welding area and, in contrast to a conventional vacuum chamber, it is movable in the welding direction. The mobile installation is very compact and reaches pressure values of around 200 mbar. The reduced pressure in the vacuum cap is sufficient to gener-ate 50% higher penetration depth in comparison to welding under ambi-ent pressure conditions. The low pres-sure around the keyhole reduces the vapour-plasma plume and therefore prevents a defocusing and scattering of the laser radiation. This allows to raise the amount of laser beam power enter -ing the keyhole as well as the effective power density." @default.
- W2170490738 created "2016-06-24" @default.
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- W2170490738 date "2015-09-01" @default.
- W2170490738 modified "2023-09-25" @default.
- W2170490738 title "Mobile Vacuum in Pocket Format" @default.
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- W2170490738 doi "https://doi.org/10.1002/latj.201500025" @default.
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