Study Of Laser Welding Of Copper Sheets

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Study of laser welding of copper sheets.

A spatter detection was developed to evaluate the process stability during the welding process. The total energy consumption required for welding copper has been mathematically reduced by 84 percent compared to infrared lasers and by as much as 92 percent for gold. Purpose of this research is to study laser autogeneous welding process of short seam beads and fillet welds of lap joints of oxygen free copper sheets 1 0 mm thick. The image is treated by matlab and simple code is built to calculate the keyhole and melted zone area.

Purpose of this research is to study laser autogeneous welding process of short seam beads and fillet welds of lap joints of oxygen free copper sheets 1 0 mm thick. A prototype of a pulsed green laser with a pulse power of 4000 w was used to weld 0 8 mm thick pure copper to 0 8 mm thick sheets of a copper alloy. Purpose of this research is to study laser autogenous welding process of short seam beads and filletwelds of lap joints of oxygen free copper sheets 1 0 mm thick. A single mode continuous wave cw laser source was exploited with both linear and wobbling strategies.

When welding foils considerable results have already been achieved in butt and edge welding. The present paper defines process windows for laser welding of thin copper and aluminum sheets in al cu and cu al lap joint configurations exploiting different process strategies and parameters. Non overlapping and overlapping spots were considered. Abstract continuous yb yag laser keyhole welding of the pure copper plate to steel 316l sheet is performed for different laser parameters.

This cw prototype system enables first basic process studies on continuous welding of copper with green laser radiation as well as a direct comparison to a similar infrared laser system. On the bases of results of quality assessment it was proved that high power diode laser hpdl welded lap joints of copper sheet provide mechanical properties on the level of parent material. Copper is highly reflective of laser light especially infrared lasers. The optimum hpdl autogenous welding parameters of short seam beads and fillet weldsof lap joints of oxygen free copper sheets 1 0 mm parameters makes possible to produce high quality laserautogenous welded lap joints of copper sheets 1 0 mm thick.

Laser welding copper to aluminum or steel can even be achieved with copper powder and thin copper foils. Its thermal conductivity is approximately 385 0 w m k and its melting point is 1 984 f 1 085 c. The laser generated welding keyhole and weld melted zone are observed by a high speed camera. On the bases of results of quality assessment it was proved that high power diode laser hpdl welded lap joints of copper sheet provide mechanical properties on the level of parent material.

Investigations on energy coupling the threshold for deep penetration welding and achievable weld shapes were performed for both wavelengths.