Metallurgy and Mechanics of Welding by Regis Blondeau

By Regis Blondeau

Regis Blondeau is an Engineer of the nationwide university of Electrochemistry and Electrometallurgy of Grenoble, France.

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14. 15). This technology makes welding possible at a considerable distance from the workpiece. This remote process uses the latest high quality laser sources (disk laser and fiber laser sources). 4. ), to supervise the welds being made (infrared thermography, plasma analysis) and facilitate robot operation (joint monitoring systems). 15. Six axis robot equipped with a remote laser welding system (Trumpf document) Power measurement Laser sources are equipped with an internal system of power measurement.

These systems are conceived according to the type of laser source used, the dimension of the parts to be welded and economic considerations. Contrary to the market of laser beam cutting, welding machines are often dedicated to an application. In order to reduce the costs, the manufacturers propose more and more machines by catalog or machines made up of standardized sub-assemblies. 12. Mixed three axis system (Balliu document) For the simplest components, machines with fixed optics are used. The components are moved under the focused beam.

Assemblies are made with all the preparation types already evoked but taking account of the need to allow sufficient access for the torch. This access can be facilitated by lengthening the wire electrode between the contact tube and the arc, with a resultant increase in the quantity of metal deposited in consequence of the heating by Joule effect in this length of wire and, generally, reduction in penetration. Welding can be carried out in all positions after adaptation of operational parameters.

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