AMT 116 AIRCRAFT WELDING Flashcards
are composed of many individual
pieces that must be securely fastened together to form a complete
structural unit. Fusion welding, non-fusion welding, hardware
fasteners, and adhesives are the principal methods used in the
construction and repair of metal aircraft joints.
Metallic aircraft structures
is the blending of compatible molten metals
into one common part or joint.
Fusion Welding
This joint can only be used where
load stresses are not significant.
Corner Joints
is uniform in width, with
even ripples that taper off smoothly into
the base metal.
Good Weld
describes the equipment and basic procedures
needed to join metals using fusion and non-fusion welding
techniques, and the methods used to repair welded aircraft
structures.
Aircraft Welding
has irregular edges and considerable variation
in depth of penetration, while a weld from excessive heat
shows pitting along its edges and long, pointed ripples.
Cold weld
are the principal methods used in the
construction and repair of metal aircraft joints.
Fusion welding, non-fusion welding, hardware
fasteners, and adhesives
is essential for the assembly and repair of a wide
range of products and structures, contributing significantly to
manufacturing, construction, and various other industrial
sectors
Welding
Before being exposed to a welding arc, you must
wear an?
arc-welding Helmet, Gloves and Proper
Clothing.
It shows good penetration, or depth of
fusion. In fact, penetration is the most
important characteristic of a ____.
Good Weld
for some time,
been the method of choice for
constructing the structural framework
of aircraft.
Fusion welding
which is com-posed of
approximately the same chemical
compo-sition as the metal to be
welded, is clamped in an electrode
holder.
Metal wire-rod
is a fabrication process that joins materials, usually
metals or thermoplastics, by using high heat to melt the parts
together and allowing them to cool, causing fusion.
Welding
To obtain the proper amount of
penetration and proper weld dimensions,
a welder must use the correct type and
size of filler rod and appropriate welding
technique for the thickness and type of
the material to be joined.
Good Weld
such as argon, helium or
carbon dioxide flows out around the
wire to protect the weld zone from
oxygen.
Inert Gas
If cracks appear adjacent to a weld, it means a part may
have cooled too quickly after being welded.
Poor weld/Cold Weld
Its ability to create strong, permanent joints is crucial for the
integrity and durability of many applications.
Welding
is the exposed surface of the weld.
Face
results in superior
strength joints because the metal
parts are melted together into a
single solid object.
Fusion Welding
also needs
appropriate protective gear. Heavy clothing or
leather aprons should be worn to cover as much
skin as practical.
Electric arc welding
The two most prominent methods of welding air-craft
structures and components are:
Fusion and Non-fusion
Where load stresses are not significant,
_____ joints may be used to join two
pieces of sheet metal.
Edge joints
It is distinct from lower temperature metal-joining techniques
such as brazing and soldering, which do not melt the base
metal.
Welding
In welding processes that use an electric arc for heat, other methods
of shielding the weld are used, including coating electrodes with flux,
or using gases to flood the area around the arc to shield the weld from oxygen.
Oxidation
is the depth that fusion penetrates into
the base metal.
Root
If a welded joint displays any of these defects, all of the
old weld must be removed and the joint rewelded.
Poor Weld
Welding thicker metals requires larger equipment; however, welding
techniques remain much the same.
OXYACETYLENE WELDING
is the joining of metals by adhesion of one
metal to another
Non-fusion Welding
Pressure is applied to hold the electrodes tightly together
while electrical current passes between the electrodes.
Spot Welding
is used primarily in large
volume production work.
Gas Metal Arc Welding
often referred to as gas welding, gets its name
from the two gases, oxygen and acetylene, that are used to produce a flame.
Oxyacetylene welding
The most prominent non-fusion welding processes used on aircraft
are:, which are covered in detail later in this
section.
Brazing and Soldering
To form an _____ joint, bend the edges
of one or both parts upward and place
the two ends parallel to each other.
Edge joint
is a primary concern to a welder. Metal oxides are formed in
the welding zone of most metallic alloys when sufficient heat is
applied.
Oxidation
Fusing of metals is accomplished by producing sufficient heat for
the metals to melt, flow together and mix.
Fusion Welding
is the distance through the center
from the root to the face.
Throat
is the form of
elec-tric arc welding that is used most in
aircraft mainte-nance.
Tungsten inert gas welding (TIG)