System for assembling, in particular by welding, structures made up of elements of pressed sheet metal, such as motor-vehicle bodies or subassemblies thereof

摘要

A flexible system for welding motor-vehicle bodies or subassemblies thereof envisages a series of pairs of side frames (4A, 4E) provided with referencing and clamping devices (3) for keeping in the correct position the structures to be assembled during welding. For each different type of body to be assembled a different pair of side frames (4A-4E) is provided, equipped with referencing and clamping devices adapted to the respective type of body. Each pair of side frames (4A-4E) is associated to a basic structure (5A-5E), with which it forms a unitary referencing and clamping module (8A-8E). Said modules can be moved through the assembly station (1) to follow one another in the operative welding position, according to the type of body to be welded. The structure to be assembled, or at least part thereof, is fed to the welding station by means of a conveying line (17) that is totally independent and separate from the basic structures (5A-5E) of the modules (8A-8E).