| 摘要 |
The present invention relates to systems for welding together pressed sheet-metal structures, particularly small subassemblies of the bodywork or mechanical parts of motor vehicles. In the automotive industry, the welding together of small subassemblies of pressed sheet-metal, such as for example, small subassemblies of the bodywork, or mechanical parts such as suspension arms or the like, is currently carried out with the use of so-called welding "presses" which have dies adapted to the specific configuration of the structure to be welded and a plurality of electrodes for simultaneously executing a series of electrical spot welds. Presses of this type can operate on different structures after the dies which are associated with the fixed and movable parts of the press have been replaced. Although a very flexible system is thus obtained, there are, on the other hand, disadvantages in the quality of the products produced as well as the high level of noise produced when the welded structures are discharged from the press. The structures are discharged simply by being dropped on to the floor and, as well as a high level of noise, this involves the risk of permanent deformation of the welded structures. The provision of a line of presses of this type also involves considerable use of manpower for the loading and discharge of the pieces. In addition, quite a long time is needed to adapt the presses to a different type of structure and it is consequently necessary to have a large number of welded pieces always available in store. structure on an auxiliary table (20) where a second robot (19) executes an additional number of spot welds, after which the second robot (19) deposits the structure in the output zone (16). <IMAGE>
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