2004 DAEWOO LACETTI Service Repair Manual

NUBIRA/LACETTIWELDING AND TOOLS 3–3
S Plate thickness and tip diameter
Plate thickness
0.6mm0.9mm1.2mm1.6mm
Minimum inter-
vals4.5Ø5.0Ø5.5Ø6.0Ø
Fig. 3
1–3. WELDING STRENGTH TEST
.Even if you perform the welding in accordance with the
conditions, the strength of the welded sections may fluc-
tuate widely with drops in the voltage and other factors.
The quality of the welding cannot be evaluated unless
the welded sections are destroyed.
.
Provide yourself with a steel plate of the same thickness
and conduct a destruction test.
.
S If holes appear in the steel plates, this means that the
welding is standard strength.
S Drive a wedge between two panels near the nugget. If
the welded parts do not come apart and the diameter of
the nugget appears more than 3 mm, the welding should
be satisfactory.
Fig. 4

3–4 WELDING AND TOOLSNUBIRA/LACETTI
Note : It is difficult to perform spot welding in the following
circumstances.
S When it is not possible to remove any rust or paint at-
tached to the welding surfaces.
S When the tip of the spot welder cannot be inserted into
the welding section.
S When the welding surfaces can be seen from the outside
and welding will impair the exterior appearance.
.
In all these cases, it is recommended that the gas weld-
ing method be employed. However, if it is not possible
to perform spot welding because of space restrictions,
plug welding based on the arc welding method may be
performed instead. Here the welding sections must be
close together.2. GAS WELDING
.
Gas welding is indispensable for body repair because of
the broad range of its applications from joining the body
panels, cutting the materials that construct the body and
applying heat to reform panels, and also because it is
easy to get hold of the tools.
However, this method requires experience.
Fig. 5

NUBIRA/LACETTIWELDING AND TOOLS 3–5
Note : Below is an example of how not to perform gas
welding, avoid operations like this.
Fig. 6
3. CARBON DIOXIDE ARC WELDER(MIG
ARC WELDING)
This welding process uses inexpensive carbon dioxide
instead of expensive inert gases as a shielding means.
Consumable metal electrodes are employed. It has a
wide range of applications, including butt welding of thin
plate, fillet welding, plug welding, and MIG spot welding.
In terms of the weld strength, it is also highly stable.
Fig. 7

3–6 WELDING AND TOOLSNUBIRA/LACETTI
4. REPAIR TOOLS
ItemWorkTools. equipment used
Protective toolsOperator
Vehicle body
Processing toolsPlug hole
drilling

NUBIRA/LACETTIWELDING AND TOOLS 3–7
Item Tools. equipment usedWork
Fixing toolsBase metal fixing
Shaping toolsSkin panel shaping
Body, frame shaping
Measuring toolsMeasuring

3–8 WELDING AND TOOLSNUBIRA/LACETTI
Item Tools. equipment usedWork
Flange toolsEdge preparation
Cutting tools.
Sanding toolsCleaning

NUBIRA/LACETTIFRONT 4–1
SECTION 4
FRONT
CONTENTS
1. FRONT PANEL 4 – 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.GENERAL DESCRIPTION4–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.REPAIR PROCEDURE4–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. FRONT WHEELHOUSE 4 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.GENERAL DESCRIPTION4–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.REPAIR PROCEDURE4–7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. FRONT LONGITUDINAL 4 – 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.GENERAL DESCRIPTION4–10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.REPAIR PROCEDURE4–11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. FRONT PILLAR 4 – 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.GENERAL DESCRIPTION4–14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.REPAIR PROCEDURE4–15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–2 FRONTNUBIRA/LACETTI
1. FRONT PANEL
1–1. GENERAL DESCRIPTION
.
The front panel is joined to the front wheelhouse and
front longitudinal. It forms the base for the headlampsand other parts and maintains the rigidity of the front
section of the body. Pay particular attention to twists
and parallelism and check mounting of related parts
when welding.
.
Fig. 1 Front Welding Assembly