Self-Study Program

57
Adhesive bonding
Adhesive bonding techniques are used on the
doors and lids of the A8. An epoxy adhesive is
used, as is typical for doors and lids in steel
constructions.
The modified epoxy adhesive is used on
joining flanges in the area of the door cut-out,
floor and suspension strut support.
An advantage of the “adhesive bonding and
punch riveting” combination is that, in
contrast to spot welding, this technique
neither produces any smoke in the adhesively
bonded area that would need extracting, nor
can the adhesive burn.
The raw body shell is completed by attaching
the ancillary parts.
In order to achieve the required strength it is
necessary to heat-treat the aluminium body.
To do this the body is heated for 30 minutes
at a temperature of 210
o
C, the so-called heat-
hardening time.
SSP239_081
SSP239_080
Areas for adhesive
bonding
(SSP160_026)
(SSP160_045)