midterms Flashcards
What are the types of electric arc weld
SMAW
GMAW
GTAW
is a manual arc welding process that uses a consumable electrode coated in flux to lay the weld. It’s one of the most widely used welding methods due to its versatility and simplicity.
Smaw or stick welding
Simplest form of welding…
SMAW
Primarily used in large volume production work
It melts both electrode or filler wire and the work metal
GMAW
Gmaw is Formerly called as ______ welding
MIG WELDING
is a type of electric arc welding that uses a non consumable tungsten as an electrode. Filler rod is needed manually (almost in the same manner as the oxyacetylene torch) .
GTAW
2 types of electrodes
Active electrodes
Inert Electrodes
Give me the types of rods
Alternatic Current Arc welding Electrode
Light Coated electrod
Bare electrodes
Pure tungsten Electrodes
Flux Cored Electrodes
Low hydrogen welding electrodes
Smaw welding electrode
Bronze/alloy brazing rods
Carbon electrodes
Consumable electodes
copper electrodes
used extensively by the aircraft industry in both manufacture and repair of aircraft.
It can be used satisfactorily to join all weldable metals, provided that the proper processes and materials are used.
Electric arc welding
direction of welding forward or away from you
Forehand welding
Direction of welding backward or inwards from you
Backhand welding
refers to an electrical pathway that allows current to flow during the welding process. It consists of several components like;
Welding circuit
Converts energy for welding.
Power supply
Holds and conduct current
Electrode
Material being welded
Workpiece
Completes the circuit and ensures safety
Ground clamp/work clamp
Refers to the electrical arc itself, which is the intense heat source formed when electricity jumps between the electrode and the metal workpiece, melting the metal.
It is a component of the arc welding process.
Welding Arc
2 types of welding arcs
Direct current
Alternating current
Steady Current in one direction
Direct current
Current alternates direction periodically.
Alternating current
Common hazzards in welding circuits
Electric shock
Fire hazards
Radiation exposure
Gases in welding that are non reactive gases mainly argon and helium that protect the weld area from harmful elements in the air, like oxygen. This protection helps prevent oxidation and results in stronger, cleaner welds. Inert gases stabilize the welding arc and are commonly used in methods like TIG and MIG welding, making them essential for working with different metals.
Inert gas
is a conductive rod or wire that carries electrical current to create an arc between the electrode and the workpiece. This process melts the electrode and the base metal, allowing them to fuse together.
Elecrtode
are numbers and letters that indicate the type of welding rod or filler metal used in a specific welding application.
Welding electrode code
Types of welding position
Vertical position
Horizontal position
flat position
overhead position
Horizontal fixed position
inclined position
Welding position
1G 1F =
Flat position
2G 2F =
Horizontal position
3G 3F =
Vertical Position
4G 4F welding position
Overhead position
5G welding position
horizontal fixed position
6G
inclined position
parts of welding machine
work
electrode holder
work cable
work clamp
electrode
welding machine
welding electrode E means
Electrode
first 2 numbers of electrode code
tensile strength
3rd number in electrode code
Welding position
4th number in electrode code
type of coatiing or welding current
types of welding passes
Root pass
Hot pass
Fill pass
Cover pass
welding patterns
stringer
figure of eight
zigzag
crescent
