1.15 Repair methods
Melting
The weld may melt in the event of excessive weld currents or
inadequate edge preparation
(Fig. I)
.
Application error ('I' shaped bead)
Application errors occur when the filling material runs into the
gap and when a weld is applied on top of another newly applied
bead that has not yet solidified.
The root must be perfectly welded. Slightly bevelling the inner
side of the sheet flanges improves the influx of the root.
Application errors consist of material separation cracks with a
high penetration effect, which compromise the strength of the
weld itself.
Soot deposits
In event of an excessively small torch angle or incorrect welding
torch movements (such as when welding forward), significant
soot deposits may be formed in certain conditions
(Fig. J)
.
Other causes of this phenomenon may be an insufficient
quantity of inert gas or inadequate cleaning of the welding
flanges.
When working with magnesium based aluminium alloys, small
soot deposits are practically unavoidable.
I
J
Copyright ©
2010
Summary of Contents for 458 Italia
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Page 522: ...Hook 95977564 AS 107564 for lifting the gearbox Page 5 of 5 Specific tooling and equipment ...
Page 586: ...In preparation Page 6 of 6 Engine overhaul Disassembly ...
Page 620: ...Perform the Fuel tank tightness test cycle Page 4 of 4 Fuel level sensor ...
Page 967: ...Refit the wheels D2 01 Page 10 of 10 Stabiliser bars Tie rods ...
Page 1127: ...Refit the wheels D2 01 Page 8 of 8 Wheelhouse ...
Page 1167: ...Prise out and remove the plug 4 Undo the nut 5 Undo the nut 6 Page 32 of 37 Doors ...
Page 1242: ...In the LOWEST position two movements are possible Page 8 of 12 Seats ...
Page 1243: ...In the INTERMEDIATE LOW position three movements are possible Page 9 of 12 Seats ...
Page 1244: ...In the INTERMEDIATE HIGH position three movements are possible Page 10 of 12 Seats ...
Page 1549: ...Reconnect the battery F2 01 Page 5 of 5 Starter motor ...
Page 1721: ...Charge the air conditioning system F5 12 Page 5 of 5 Condenser ...
Page 1740: ...Refit Page 13 of 13 A C unit ...
Page 1764: ...FD0001 Fuel supply distribution 0 99999 Page 10 of 56 PDF ...
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