Process for lap-bonding of two metal members having...

Details Process for lap-bonding of two metal members having... Process for lap-bonding of two metal members having...

B - Operations, Transporting

23

K

B23K 11/20 (2006.01) B23K 11/11 (2006.01) B23K 35/00 (2006.01)

Patent

CA 2232480

In an area where an Al alloy plate and a steel plate lap each other, a circular blank of steel plate is made to lap the Al alloy plate, and these three members are compressed by a pair of electrodes while a welding current is passed between the both electrodes. Thus melting of a current passing portion of the Al alloy plate and a neighborhood thereof, removal of the melted portion due to partial expanding deformation of the blank toward the Al alloy plate, abutting of the expanding deformed portion against the steel plate and resistance welding of the expanding deformed portion with the steel plate are successively carried out.

Dans une zone où une tôle en alliage d'Al et une tôle d'acier se chevauchent, un flan circulaire fait d'une tôle d'acier est disposé de manière à chevaucher ladite tôle en alliage d'Al. Ces trois éléments sont ensuite comprimés par deux électrodes entre lesquelles on renvoie un courant de soudage. On assiste ainsi à la fusion de la partie de la tôle en alliage d'Al où passe le courant, ainsi qu'à la fusion de la zone avoisinant cette partie. La partie fondue est éliminée étant donné la déformation en expansion partielle du flan vers la tôle en alliage d'Al. La partie déformée en expansion est ensuite mise en butée contre la tôle d'acier, ces dernières étant enfin soudées par résistance.

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