Multi-point laser beam welding installation for vehicle bodies

A multi-point laser beam welding installation for the assembly of vehicle body pieces comprises:

• positioning means for pieces including a punch and a die which are mobile in relation to one another and which are shaped to correspond to at least part of the pieces, vehicle body pieces held between said punch and said die;
• said positioning means having a cavity which opens onto the pieces;
• means for gripping said pieces being operatively associated with said positioning means;
• means for welding including at least one laser beam source for supplying a laser beam and at least one laser beam head fixed to said positioning means, said laser beam welding head comprising means for focusing the laser beam onto the cavity;
• and
• means for distributing the laser beam being provided between the laser beam source and said welding head and adpated for succesively orienting the laser beam toward the head, whereby spot welding is successively carried out when the pieces are positioned and gripped.