Process and plant for joining aluminium parts by soldering,...

B - Operations – Transporting – 23 – K

Patent

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B23K 1/19 (2006.01)

Patent

CA 2180637

The invention relates to a process for joining overlapping aluminium parts forming a solder gap between them by soldering with a solder suitable for an A1/A1 as the filler and a flux, in which first of all a quantity of filler and flux corresponding to the solder requirement is deposited near the visible start of the solder gap and then the aluminium parts are heated for long enough for the filler to melt and creep into the solder gap, whereupon heating is stopped. The feature of the process of the invention is that a region of the visible start of the solder gap and the deposited filler and flux is continuously and contactlessly monitored during heating and the heating adjusted as soon as a control pulse triggered by the sensor has recorded the melting of the filler or the flux.

L'invention concerne un procédé servant à assembler des pièces en aluminium se recouvrant partiellement et formant entre elles un espace de soudage par soudage au moyen d'un produit de soudage convenant pour un soudage Al/Al comme métal d'apport et au moyen d'un flux, procédé selon lequel on dépose tout d'abord à proximité du début visible de l'espace de soudage, en quantités correspondant aux besoins du soudage, un métal d'apport approprié et un flux, et selon lequel on chauffe ensuite les pièces en aluminium jusqu'à ce que le métal d'apport soit fondu et s'insère dans l'espace de soudage, puis on arrête le chauffage. Le procédé objet de l'invention est caractérisé par le fait qu'une zone du début visible de l'espace de soudage et du métal d'apport déposé ainsi que du flux est contrôlée en continu et sans contact par un capteur pendant le chauffage et que ce chauffage est réglé dès qu'une impulsion de commande déclenchée par le capteur a enregistré la fusion du métal d'apport ou du flux.

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