Welding is usually performed between two workpieces, and there are usually many clamping points. Resistance welding is an efficient welding process. In order to reduce the auxiliary time of loading and unloading workers, efficient and fast devices and multi-point linkage mechanism should be adopted for clamping.
Structural characteristics of welding fixture for automobile body;
The body welding fixture is huge in volume and complex in structure. In order to facilitate the manufacture, assembly, inspection and maintenance, the fixture structure must be decomposed, otherwise the measurement cannot be carried out.
The body assembly clamp has three assembly datum: bottom plate, left side wall and right side wall, and datum grooves and coordinate lines are machined on their planes. The positioning and clamping combination units are assembled and tested according to their respective reference grooves, and the last three parts are combined into a complete fixture. ?
Positioning characteristics of body welding fixture;
The body welding fixture is mostly located by the surface appearance of stamping parts, the forming platform on the surface, the steps formed by stretching and bending, the trimming window and outer edge, the assembly hole and the process hole, which largely determines the special shape of its positioning elements, and rarely uses standard parts.
Welding workpieces should be positioned separately on the welding fixture to avoid mutual interference, and the interdependence of workpiece assembly should be fully utilized as natural positioning support when designing positioning elements.
Part of the workpiece is welded into a closed body, and the positioning bracket cannot be set. Pre-punching platform and flanging can be required as positioning control points in product design. In a word, try not to use welding fixture in the assembly with lax requirements. On the body welding fixture, there are many plate-shaped positioning plates, which are generally A3 and A5 steel plates with a thickness of 12-20mm.