New Technology In Laser Welding Of Thin Filaments

Yongzeng Li; Qiu'e Zhang; Shulin Ma; Yongda Li; Fenggui Tian

doi:10.1117/12.966959

1 January 1987 New Technology In Laser Welding Of Thin Filaments

Yongzeng Li, Qiu'e Zhang, Shulin Ma, Yongda Li, Fenggui Tian

Proceedings Volume 0744, Lasers in Motion for Industrial Applications; (1987) https://doi.org/10.1117/12.966959
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

It is difficult to get a good welding spot and nearly impossible to weld a 10 micron diameter filament (e.g. NiCr) onto a foreign workpiece over 1000 times larger in size. In this paper we introduce the laser powder-covered welding technique. The first step is to laser- weld a metal powder onto a small area of interest of a larger-sized workpiece. This changes the nature of the larger-sized material. The second step is to position the thin filament in contact with the larger workpiece and to apply the pulsed laser so a round and smooth welding spot forms. This should form a good alloy combination. This welding technique has a high success rate for welding minute electrical heat source, independent of the material of the larger workpiece. This technique also solves the problems of unstable quality in tin welding, burrs in pressure welding, and eliminates the problem of welding flux corrosion. This same technique is applied to the laser-welding of a super-thin piece to a foreign workpiece, where the welding spot forms a "micro-rivet': In the paper we present specific conditions required, the analysis data of the welding quality and the specific structure of the laser-welding workstation.

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Yongzeng Li, Qiu'e Zhang, Shulin Ma, Yongda Li, and Fenggui Tian "New Technology In Laser Welding Of Thin Filaments", Proc. SPIE 0744, Lasers in Motion for Industrial Applications, (1 January 1987); https://doi.org/10.1117/12.966959

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KEYWORDS

Copper

Laser welding

Silicon

Laser applications

Laser energy

Nickel

Tin

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