SMAW (stick) Flashcards
What does SMAW stand for?
Shielded metal arc welding
What is shielded metal arc welding?
Stick (arc welding)
What is the basic explanation of shielded metal arc welding?
Coated electrodes (sticks) are melted by an electric arc to form a weld
What is the common temperature of shielded metal arc welding?
Over 9000 degrees Fahrenheit ( 4980 degrees Celsius)
What does ac stand for in terms of power
Alternating current
What does dc stand for in terms. Of power
Direct current
What does cc stand for in terms of power ?
Constant current
What does cv stand for in terms of power?
Constant voltage
What is a power source called that can accommodate both cc and cv power?
Multi process power sources
What power source is amperage adjustable on?
Cc output (constant current)
What power source is output and voltage adjustable on?
Cv output (constant voltage)
What determines the amperage output and duty cycle in reference to smaw and where is it found?
Thickness of metal
Continuous welding time
Nameplate of the power source and in the owners manual
What is the duty cycle?
The percentage of a 10 minute period that a welding power source can be safely operated at a given output
What are the two types of electrode holders?
Alligator jaw
Short stub
How are gases used in SMAW processes?
From flux burned of the electrode
What does slag do?
Protects the weld during cooling
What is the minimum temperature a rod oven should be kept at?
120 degrees C (250F)
What should be done with electrodes that have been left exposed to air for a length of time?
Dried for 1 hour between 370-430 C (700-800F)
What electrode should NOT be put in an oven?
E6010
What type of electrodes MUST be kept dry?
Low hydrogen
What is the American welding society (AWS) ID?
Electrode code
What does the letter E mean in a AWS (American welding society) ID?
A covered arc welding electrode
What do the first 2 digits indicate in an AWS (American welding society) ID?
Minimum tensile strength
In thousands of pounds per square inch (psi)
Ex. 70=70,000psi
What does the third digit indicate in an AWS (American Welding Society) ID?
The position the electrode can be used in
How many position options are there?
4
What does the #1 in E7018 mean?
All position
What does the #2 in E7024 mean?
Flat and horizontal position
What does a #3 in the third digit of a AWS (American welding society) ID mean?
Electrode can be used in flat position only
What does a #4 in the third digit of a AWS (American welding society) ID mean?
Electrode can only be used in a flat and down position
What does the final digit indicate in a AWS (American weld Society) ID mean?
Indicates the type of coating and polarity
What does DCEN mean?
Direct current electrode negative
What does DCEP mean?
Direct Current electrode positive
What does the work clamp do?
Completes the welding circuit
How can a poor work connection be identified with SMAW ?
Checking the welding connections for warmth
If a welding connection is warm what should you do?
Up the wire size or check connections
If a welding current in SMAW is between 60-160 what colour shade should you be wearing?
8-10
If the welding current is between 250-550 what colour shade should you be wearing?
11-14
What is a magnifier in terms of welding shields?
A lens to replace wearing prescription glasses
What are the 4 types of welds used to fill a gap?
Root weld
Filler
Cover
Finish
What weld goes on the bottom of a gap?
Root weld
What weld fills the most space and gives the most strength?
A filler weld
How many welding position numbers are there?
4
I’m terms of electrode identification what numbers indicate no oven?
0 and 1 for type of coating
What do the first 2 digits on an electrode identification mean?
Tensile strength x1000
What does the 3rd digit on an electrode identification mean?
Welding positions
What number means all position on an electrode identification?
Third digit #1 only
What does fast freeze mean in terms of electrodes (SMAW)
Takes form quickly ideal for horizontal and overhead
What does fast fill mean in terms of SMAW electrodes?
An electrode with a high deposit rate
How can you tell if the amperage is too high? (SMAW)
Electrode turns red
Weld is red 3/4” after stopping arc
How large should the weld size be in comparison to the electrode?
2x the diameter of the core size
What is a keyhole in terms of SMAW?
Slight groove on the end/beginning of the weld indicating proper penetration
When is a weld too tall with not enough penetration?
If it’s 1/8” above the metal or greater
