In this paper a device is presented, which allows the controlled use of linear polarization in all kinds of three-dimensional laser materials processing. The functioning fundamentals of the device are discussed in detail. Further on, recent results of laser welding on car body sheet steel (mild steel St 14, thickness 1 mm) are presented, which were obtained with a 5 kW CO2-laser and an articulated arm laser robot system. The data allow to compare the attainable results with linear and circular polarization. From this, the benefits offered by the employment of the new developed device can be clearly stated. The welding results obtained with a linear polarization show distinct increase of both maximum possible welding speeds and process efficiencies as compared to circular polarization. At the same time the seam width also turns out to be strongly dependent on the polarization. The possibility to alter and control the seam geometries by an inclination of the polarization plane with respect to the welding direction proofs the polarization to be an additional processing parameter in laser welding.
Controlled use of linear polarization in 3D laser welding
Gesteuerte Anwendung linearer Polarisation im dreidimensionalen Laserstrahlschweißen
1992
8 Seiten, 8 Bilder, 4 Quellen
Conference paper
English
Controlled use of linear polarization in 3D laser welding
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