Page 1241 - Foton Workshop Manual - Auman EST-M

Body - Body assembly BW - 3

e. Annealing operation IN

Purpose Restore the original tension of the extened sheet metal.
DI
1. If the area to be annealed is relatively small, the tension of the sheet metal part can be restored by

the annealing operations on one or two points around the extension center;
EG
Method, standard 2. If the area to be annealed is relatively larger, the tension should be rescored with carbon rod

annealing method from outside to inside, extending from the extension center; carefully find the
prutrution positions, and anneal them one by one, to restore the extension of the extension region. TR

Tool, material Meson machine, slide hammer, carbon rod, gasket
AX
Labor protective wearing Mitten, dust mask, goggles, hat, safety shoes

f. Residual paint film removal
FR
Purpose Remove the old paint film on tapped positions, to ensure a solid base on the repair position;

1. Remove the old paint film at a certain angle of inclination with a single action grinding machine; ST

Method, standard 2. Remove the old paint film at the small depressions with a belt grinding machine;
3. Place flattly the single action grinding machine, with P60 or P80 sandpaper. BR

Tool, material Single action grinding machine, belt grinding machine, P60 or P80 sandpaper
BW
Labor protective wearing Mitten, dust mask, goggles, hat, safety shoes

g. Bottom process (to form feathery surface)
EL
Form a smmoth transition of all paint layers of the old paint film, to inspect the flatness of the sheet
Purpose
metal.

1. Grind each paint layer to form the spacing of about 10mm2 at a certain angle of inclination
(15°) with a double action grinding machine with P60 or P800 sandpaper;

2. Remove the grinding marks with a double action grinding machine with the corresponding
Method, standard
sandpaper (P80 ~ P120);

3. Remove the old paint film (if there is no depression, but damaged paint film; this operation may be

omitted).

Single action grinding machine, belt grinding machine, double action grinding machine,
Tool, material
P80-P120 Discs, P60 belt dry grinding sandpapers

Labor protective wearing Mitten, dust mask, goggles, hat, safety shoes

h. Intermediate inspection

Purpose Inspect the repair result of the sheet metal

Inspect the repair result of the repaired position on the sheet metal with a steel ruler, with the
Method, standard
following requirements: There should be no protrution or depression points that exceed 1mm.

Tool, material Steel ruler

Labor protective wearing Cotton gloves, hats, safety shoes

BW-003