Effects of reduced ambient pressure on spattering during the laser beam welding of mild steel

2019 ◽  
Vol 31 (4) ◽  
pp. 042016 ◽  
Author(s):  
Volker Rominger ◽  
Peter Berger ◽  
Helmut Hügel
Keyword(s):  
Laser Beam ◽  
Mild Steel ◽  
Ambient Pressure ◽  
Laser Beam Welding

scholarly journals Effects of Reduced Ambient Pressure and Beam Oscillation on Gap Bridging Ability during Solid-State Laser Beam Welding

2020 ◽  
Vol 4 (2) ◽  
pp. 40
Author(s):  
Markus Köhler ◽  
Tamás Tóth ◽  
Andreas Kreybohm ◽  
Jonas Hensel ◽  
Klaus Dilger
Keyword(s):  
Solid State ◽  
Laser Beam ◽  
Ambient Pressure ◽  
Laser Beam Welding ◽  
Solid State Laser ◽  
Basic Process ◽  
Solid State Lasers ◽  
Gap Bridging ◽  
Welding Processes ◽  
Beam Oscillation

In recent decades, beam welding processes have been set up as a key technology for joining applications in automotive engineering and particularly in gearbox manufacturing. Due to their high beam quality, energy efficiency, reliability as well as flexible beam guidance, modern solid-state lasers offer numerous advantages, but also pose increased requirements on the production and positional accuracy of the components for the joining process. In particular, small-focus diameters present a challenge for components with process-induced tolerances, i.e., disc carriers in automatic transitions. Furthermore, welding processes utilizing solid-state lasers show an increased spatter formation during welding at high welding speeds. Accordingly, the primary objective of the presented work consists in extending the current areas of application for solid-state laser beam welding in gearbox manufacturing through an improved process reliability regarding tolerance compensation and spatter formation. Therefore, this experimental study aimed to describe the effects of a dynamic beam oscillation in combination with a reduced ambient pressure in the process environment on both gap bridging ability and spatter formation during the laser beam welding of case hardening steel. For basic process evaluations, laser beam welding at reduced ambient pressure and laser beam welding with dynamic beam oscillation were initially studied separately. Following a basic process evaluation, samples for 2 mm full-penetration-welds with varying gap sizes were analyzed in terms of weld seam geometry and weld spatter formation.

scholarly journals Keyhole depth instability in case of CW CO2 laser beam welding of mild steel

Sadhana ◽  
2010 ◽  
Vol 35 (5) ◽  
pp. 609-618 ◽  
Author(s):  
N. Kumar ◽  
S. Dash ◽  
A. K. Tyagi ◽  
Baldev Raj
Keyword(s):  
Laser Beam ◽  
Mild Steel ◽  
Co2 Laser ◽  
Laser Beam Welding ◽  
Cw Co2 Laser
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