Mercedes-Benz Body & Equipment Guideline for Metris - BM 447, Version November 27, 2015.
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Please observe the revision notes compared to 09/18/2015 ! Only print out complete sections of the current version!
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4.7 Threaded and welded connections
4 Planning of bodies
Distance from sheet edge
To avoid melting core damage, the specified distances
to the sheet edge must be maintained (L = 3e + 2 mm).
Ratio of sheet thickness to distance from sheet
edge
e Sheet thickness
L Distance from sheet edge
Gas-shielded plug welding
If overlapping sheets are only accessible from one side,
use either gas-shielded plug welding or tack welding for
the weld joint.
If the joint is produced by stamping or drilling followed
by plug welding, the drilled area must be deburred
before welding.
Ratio of sheet thickness to plug hole diameter
D = Plug hole
diameter [mm]
4.5
5
5.5
6
6.5
7
e = Sheet
thickness
[mm]
0.6
0.7
1
1.25 1.5
2
Mechanical quality can be additionally improved by the
use of "elongated holes" (l = 2b).
Ratio of width to length of elongated hole
b Width of elongated hole
I Length of elongated hole