Self-Study Program

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MIG welding in the floor structure of the A2
MIG welding is mainly used to bond the
extruded profiles in the floor assembly
(profile T-joints).
Just like on the Audi A8, MIG welding is also
used on the Audi A2.
Thanks to optimisation measures in
production and a significantly higher
precision of components due to the IHF
calibration it has been possible to increase
the level of automation.
Metal inert gas welding
MIG welding is used to join together extruded
profiles to build up the frame structure.
With this thermal bonding technique
extensive production experience is available.
On the Audi A8 approx. 70 m of welds on each
vehicle are MIG-welded.
This method has established itself as
economical and highly flexible.
However, its disadvantages are the high heat
impact and the low bonding speed.
The Audi A2 only requires about 20 m of MIG
welds.
The highly developed plant engineering is
controlled via a process monitoring system.
Large rollers are used which increase the
bonding speed, and weave pass welding is
not required.
SSP239_047
In addition, MIG welding is also used in the
construction of the front and rear ends,
where extruded profiles, cast parts and
combinations of the two are welded.
SSP239_049
Bonding techniques