SILL ASSY (rocker panel)
The sill assembly, also known as the rocker panel, is a key structural component of a vehicle's body-in-white (BIW) located along the lower sides of the car, between the front and rear wheel arches, just below the doors.
It serves several critical functions:
- Structural reinforcement: It contributes to the torsional and bending stiffness of the vehicle's body, especially in side-impact situations.
- Crash protection: Acts as part of the side impact crash structure and energy absorption system.
- Load transfer: Helps distribute forces from the front and rear suspension and during jacking or towing.
- Mounting point: Provides construction for the door rings or for b-pillars.
The sill assembly is typically made from high-strength steel or aluminum and is produced using stamping and welding processes, sometimes reinforced with internal reinforcements.
This component
is manufactured and assembled
using technologies such as:
Hot Stamping
Laser Cutting
Cold Stamping
Projection welding
Spot welding
Glueing application
BODY IN WHITE
Body in White (BIW) is the stage in automotive manufacturing where the vehicle’s sheet metal structure (body) is fully assembled.
BIW includes the main structural and outer body components such as:
floor pan, roof, side panels, front and rear aprons, pillars (A, B, C), door frames, hood and trunk lid (if pre-assembled).
These components made and joined using technologies such as:
hot and cold forming, spot welding, laser cutting, MIG/MAG welding, laser welding, riveting, adhesive bonding.
The BIW structure ensures vehicle stifness, crash safety, dimensional accuracy, and provides the base for further assembly and surface finishing processes.
