Robotic Headlamp Assembly Using Sonic Fastening and Lens Adhesive

The assembly process is divided into two independent sub-assemblies (first sub-assembly with metal components and second sub-assembly with plastic components), each welded separately on different tilting tables. This segmentation allows parallel processing and eliminates the need for sequential heating and cooling of the entire assembly, significantly reducing manufacturing cycle time while maintaining bond strength.

The metal components are sonically welded to the first sub-assembly in advance before final assembly with the plastic components. This preliminary welding action allows the metal sub-assembly to be prepared independently and simultaneously with the plastic sub-assembly, eliminating the time-consuming sequential heating and cooling process while ensuring strong bonds are formed beforehand.

The patent replaces the traditional thermal field (heating and cooling equipment) with a mechanical field (sonic welding system). The sonic welding robots use high-frequency mechanical vibrations to join metal and plastic components directly, eliminating the need for complex heating and cooling equipment while maintaining effective joining capability between dissimilar materials.

The invention utilizes mechanical vibration through sonic welding to join components. The sonic welding robots generate high-frequency vibrations that create friction heat locally at the welding interface, allowing rapid joining of metal and plastic components without the need for extensive external heating and cooling equipment, thus simplifying the manufacturing system.