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Laser Components (UK) Ltd.
Goldlay House,
114 Parkway,
Chelmsford Essex CM2 7PR
United Kingdom
Phone: +44 1245 491 499
E-Mail:info@lasercomponents.co.uk

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Diffractive Optical Element for Efficient Laser Brazing

04.06.2018

Smooth Brazing Seams on Hot-dipped Surfaces


Holo/OR, industrial partner of LASER COMPONENTS, has developed a diffractive optical element (DOE) that significantly accelerates the laser brazing process for hot-dip galvanized metal sheets. It provides better melting performance and cleaner edges. The DOE made of UV fused silica has an efficiency of 90%. It splits the incoming beam into three beams with different diametres and power levels. Two smaller stripping beams ensure that the zinc coating is preheated, cleaned and preconditioned for brazing. The large centre beam performs the actual brazing process. Its homogeneous energy distribution ensures that the brazing material is melted evenly. So far, similar results could only be achieved with several lasers or complex optomechanical elements.

Laser brazing uses a laser to melt the brazing material and join two metallic components together. In contrast to the welding process, the parts themselves are only minimally heated. In the case of hot-dip galvanized sheets, this means that the zinc layer evaporates only in a very limited area and the sheets are hardly deformed during processing. Providing connections with high mechanical stability without impairing the corrosion protection, laser brazing has become an important process in the automotive industry. On the other hand, oxides and impurities in the zinc layer of the soldered seam can cause irregularities such as splashes, pores or uneven surfaces. This effect is now prevented by the new DOE.



Further product information:
Diffractive Optical Elements

Manufacturer:
Holo-OR Ltd.

Contact:

Contact Person:    Chris Varney
Company:    LASER COMPONENTS (UK) Ltd.
Address:    Goldlay House 114 Parkway
Postcode / City:    CM2 7PR Chelmsford Essex
Phone:    +44 1245 491499
Fax:    +44 1245 491801
Email:    cvarney@lasercomponents.co.uk
 

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