MOTOR TRUCK SERVICE MANUAL
BODIES AND CABS
WELDING PROCEDURES, INSTRUCTIONS
AND SAFETY PRECAUTIONS
aluminum equipment using the SE-2165 Linde SWM-15
With the introduction of aluminum into the
Short Arc Welder, While similar welders are available
manufacturing of truck cabs, bodies and cab under
from other manufacturers, the SE-2165 (Fig. 1) welder is
structures, it becomes necessary for the operator of
illustrated herein. NOTE The gas containers shown in
welding equipment to understand a few special
Fig. 1 are not included with the SE-2165 but are obtained
precautions in order to assure satisfactory work when it
locally.
becomes necessary to perform any welding on
aluminum.
MIG welding is a process in which a consumable
bare electrode is fed into a weld at a controlled rate while
Generally, the operator of conventional steel welding
a continuous blanket of inert gas shields the weld zone
equipment will not find it difficult to handle the welding of
from contamination by the atmosphere. (Fig. 2) MIG
aluminum, providing he becomes familiar with the metal-
welding produces high-quality welds, at high welding
arc inert gas (MIG) method of welding. This manual
speeds, without the use of flux.
covers basic principles in making repairs on
Fig. 2. Diagram Showing Details of Shorting
Arc Process and the Inert Gas Shielding
The MIG process includes two distinctive techniques
or process variations, known as shorting arc and spray
arc welding. Shorting arc welding operates on generally
lower arc voltages and amperages than spray arc,
pinpoints the arc heat and produces a small fast freezing
weld puddle.
The spray arc process provides an
intensely hot, higher voltage arc and higher deposition
Fig. 1. Typical Arc Welder
rates.
(SE-2165 Linde VI-200C Unit Shown)
104