BIW stands for Body In White which is assemble of sheet metal after welding and before painting.
Simply we can consider it as car sheet metal welded structure (body shell).
BIW consist welding of various sub-assemblies like Under body, Body side
Left Hand Side/ Right Hand Side, Front End, Roof etc. which gets welded
together by various metal joining process like resistance spot welding, Laser
welding,MIG welding.
All the
Interior Parts(Commonly used in Automotive) e.g. Dashboard, Trim (Door Trim,
Pillar Trims, Roof liner, Seats are mounted on the BIW shell with the help of
various brackets or nuts mounted on the BIW.
Exterior
(Commonly used term in car industry) components e.g. Front Bumper, Rear Bumper,
Fender LH/RH, Side Mirrors are mounted on the BIW shell with the help of
various brackets or mounting systems.
In
car industry outer look defines the style. BIW sheet metal part shell defines
overall car style.
Material of BIW : BIW is made of different steel grade such as DD,DP,HDP and in some cases it is made of aluminium alloy such as audi A8.
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