Developments for laser joining with high-quality seam surfaces

Vollertsen, Frank; Woizeschke, Peer; Schultz, Villads; Mittelstädt, Christoph

doi:10.1007/s41777-017-0041-1

Cited by 6 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Laser beam welding is one of the largest areas of application. It not only enables precise and reproducible joining of components, but also, through innovative approaches, the efficient production of seams with high-surface quality, which can be used in parts of the structure that later become visible to the customer [1]. The visible surface quality of a product is significantly linked to the quality perception of the customer, and hence affects their purchase decision [2].…”

Section: Introductionmentioning

confidence: 99%

High Seam Surface Quality in Keyhole Laser Welding: Buttonhole Welding

Schultz

Woizeschke

2018

JMMP

Self Cite

View full text Add to dashboard Cite

Keyhole laser welding experiments with 1.5 mm thick aluminum sheets (EN AW-6082) were carried out with transversal beam oscillation and wire feeding. A circular cavity, which was named buttonhole, formed directly behind the laser spot at certain oscillation frequencies. The welding states “no buttonhole”, “unstable buttonhole”, and “stable buttonhole” were distinguished. The melt pool dynamics were experimentally analyzed and correlated with the resulting roughness and waviness of the seam surfaces. Criteria for stable buttonhole welding were derived. On the basis of the cavity radii relations, it is shown that capillary pressure conditions can explain the movement of the buttonhole with the process.

show abstract

Section: Introductionmentioning

confidence: 99%