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Proceedings Paper

New Technology In Laser Welding Of Thin Filaments
Author(s): Yongzeng Li; Qiu'e Zhang; Shulin Ma; Yongda Li; Fenggui Tian
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Paper 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.

Paper Details

Date Published: 1 January 1987
PDF: 6 pages
Proc. SPIE 0744, Lasers in Motion for Industrial Applications, (1 January 1987); doi: 10.1117/12.966959
Show Author Affiliations
Yongzeng Li, Changchun Institute of Optics and Fine Mechanics (China)
Qiu'e Zhang, Changchun Institute of Optics and Fine Mechanics (China)
Shulin Ma, Changchun Institute of Optics and Fine Mechanics (China)
Yongda Li, Changchun Institute of Optics and Fine Mechanics (China)
Fenggui Tian, Changchun Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 0744:
Lasers in Motion for Industrial Applications
David A. Belforte, Editor(s)

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