What is the positioning of the welding fixture of the car body

2023-04-08


The body welding fixture has a huge volume and a complex structure. In order to facilitate manufacturing, assembly, inspection and maintenance, the fixture structure must be decomposed, otherwise it cannot be measured. The body assembly clamp has 3 assembly datums: the bottom plate, the left side wall and the right side wall, which become a complete set of fixtures.

As mentioned earlier, the body assembly clamp has 3 assembly standards: the bottom plate, the left side wall and the right side wall, which become a complete set of fixtures. Reference grooves and coordinate lines are processed on their planes, and the positioning and clamping combination units are assembled and tested according to their respective reference grooves. The positioning characteristics of the body welding fixture: most of the body welding fixtures are in the shape of the curved surface of the stamping part.

The reshaped platform, the step formed by drawing and bending on the curved surface, the trimmed window and outer edge, the assembly hole and the process hole positioning, which largely determine the special shape of the positioning element , Seldom can use standard components.

Welding fixtures should respectively position the welded workpieces so that they do not interfere with each other. When designing positioning components, make full use of the interdependence of workpiece assembly as a natural positioning support. Some workpieces are welded into a closed body, and positioning support cannot be set. The pre-punching platform and flanging can be required as positioning control points during product design. In short, for non-strict assembly, do not use welding fixtures as much as possible.