Spray Transfer Weld Quiz
[1] Complete
the following, to reduce weld spatter when using spray transfer you typically
have to increase or decrease what parameter?
Ans._______________________________________________________________
[2] You wish to reduce
weld burn through potential when using spray transfer should you increase
or decrease the push angle?
Ans.________________________________________________________________
[3] You are using a
robot, an argon 15% CO2 mix, with an 0.035 (1mm) E70S-6 electrode. You will
be welding carbon steel parts 2.5 mm thick. You wish to use spray transfer.
As you will require a low current spray setting, you will need to know the
spray transfer wire feed start point, select one of the following.
[a] 250 in./min
[b] 350 in./min
[c] 450 in./min
[d] 550 in./min
[4] With a traditional
CV power source and wire feed control, a typical spray transfer weld current
range for an 0.035 electrode is
[a] 170 to 270 amps
[b] 220 to 370 amps
[c] 280 to 390 amps
[5] Inductance when
added to a spray transfer can,
[a] Makes the weld
more fluid.
[b] Affect the arc starts.
[c] Make the weld freeze faster
[6] You are using a
robot, an argon 10 % CO2 mix, with an 0.045 (1.2mm) E70S-6 electrode. You
will require a low current spray setting, you will need to know the spray
transfer wire feed start point, select one of the following.
[a] 260 in./min
[b] 380 in./min
[c] 420 in./min
[d] 460 in./min
[7] With a traditional
CV power source and wire feed control, plus an argon mix containing 20 % CO2,
a typical spray transfer weld current range for an 0.045 (1.2mm) electrode
is,
[a] 210 to 320 amps
[b] 230 to 390 amps
[c] 250 to 410 amps
[8] You are using a
robot, an 0.045 carbon steel wire and an argon 10% CO2 mix. At the weld start
excess weld spatter is produced. You unknowingly put globular transfer weld
data into the robot arc start weld data. Select data which will produce globular
transfer.
[a] wire feed 210 in./min,
volts 17
[b] wire feed 250 in./min, volts 19
[c] wire feed 300 in./min, volts 23
[d] wire feed 380 in./min, volts 27
[9] You are using spray
transfer and welding with a robot. You decide to increase the weld travel
rate by 20%. The resulting weld size is fine, however to stabilize the arc
you will have to make a weld parameter change? What is that change?
Ans.______________________________________________________________________
[10] Fill in the following.
You are about to robot weld a ¼ (6mm) fillet weld on clean plate. You
are using an 0.045 (1.2mm) E70S-6 electrode and a 10% CO2 gas mix. Without
reference to a text book, procedure or without playing with the weld parameters
fill in the required weld data.
[a] Wire feed rate._______in./min
or ________m/min. [b] Weld voltage._________
[c] Weld travel speed.
_______ [d]Weld start wire feed._______ [e]Weld start voltage._______
[f] Weld end wire feed
rate.______ [g] Weld end voltage.________
Weld process control comes from weld process knowledge. If you have to go
to a text book to find the answers to these practical questions you have not
mastered your craft. Ed has written welding training text books and produced a video
that provides these answers in an easy to remember format.
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