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Block 6 Mig/tig > Mig > Flashcards

Mig Flashcards

0
Q

Flat
Lap
Work angle

A

45

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1
Q

Flat
Butt
Work angle

A

90

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2
Q

Flat
T
Work angle

A

1-45
2-55
3-35

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3
Q

Horizontal
Butt
Work angle

A

80-85

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4
Q

Horizontal
Lap
Work angle

A

45

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5
Q

Horizontal
T
Work angle

A

1-45
2-55
3-35

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6
Q

Vertical down
Butt
Work angle

A

90

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7
Q

Vertical down
Lap/t
Work angle

A

45

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8
Q

Vertical up
Butt
Work angle

A

90

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9
Q

Vertical up
Lap/t
Work angle

A

45

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10
Q

Overhead
Butt
Work angle

A

90

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11
Q

Overhead
Lap
Work angle

A

45

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12
Q

Overhead
T
Work angle

A

1-45
2-55
3-35

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13
Q

Flat
Butt lap T
Travel angle

A

15-30 drag

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14
Q

Horizontal
Butt Lap T
Travel angle

A

15-30 drag

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15
Q

Vertical down
Butt Lap/T
Travel angle

A

15-30 drag

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16
Q

Vertical up
Butt lap/T
Travel angle

A

5-10 push

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17
Q

Overhead
Butt lap T
Travel angle

A

5-10 drag

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18
Q

Flat
Butt
Motion

A

Root pass-steady drag

Cover pass- weave

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19
Q

Flat
Lap/t
Motion

A

Slight weave

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20
Q

Horizontal
Butt lap t
Motion

A

Slight weave

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21
Q

Vertical down
Butt lap t
Motion

A

Drag z weave

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22
Q

Vertical up
Butt lap t
Motion

A

Push
Lap slight weave
T weave

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23
Q

Overhead
Butt
Motion

A

Drag

24
Q

Overhead
Lap T
Motion

A

Slight weave

25
Q

Stainless steel

  • small droplets of metal are sent through the arc by directional force.
  • used where gravity could be a factor
A

Spray arc transfer

26
Q

Methods of filler wire transfer… Stainless steel

A
  • spray arc transfer
  • short-circuiting transfer
  • globular transfer
27
Q

Travel an work angles are…

A

The same as you would use for mild steel

28
Q
  • Tip increases 2-3 times the electrode diameter before separating.
  • common problems: (excessive spatter, poor arc stability, poor penetration)
A

Globular transfer

29
Q

Stainless steel
-makes smaller puddles
-arc extinguishes and arcs again 20-200 times per second:
(cools the puddle, shallow penetration)

A

Short- circuiting transfer

30
Q

Welding process that uses an arc between a continuous filler metal electrode and weld pool..

A

MIG

31
Q

Mig requires a power supply unit that produces ____ or ____..

A

DCSP or DCRP

32
Q

____ is used for almost all applications of gas metal arc welding…

A

DCRP

33
Q

Mig uses ______ filler rod…

A

Continuous fed consumable

34
Q

True.. False.. Mig is the faster welding process.

A

True

35
Q

Recommended type of machine for mig welding…

A

Rectifier or motor generator

36
Q

The machine should also supply direct current with normal limits of ____-____ amps for all position welding

A

200-250

37
Q

Use ______ polarity for optimum efficiency…

A

DCRP

38
Q

_______ is generated from the current flowing through the gap between the electrode and the work..

A

Welding heat

39
Q

Machine not recommended….

A

Constant current

40
Q

Machine that is recommended…

A

Constant potential

41
Q

2 basic controls are…

A

Voltage rheostat and wire feed rheostat…

42
Q

2 types of welding guns…

A

Push and pull

43
Q

Welding gun used for soft wire aluminum and magnesium..

A

Pull gun

44
Q

Welding gun used for hard wires where currents exceed 250amps

A

Push gun

45
Q

Wire diameter best for welding thin materials

A

0.020, 0.030, 0.035

46
Q

Wire diameters most used for medium thickness are…

A

0.045” , 1/16”

47
Q

Wire diameter used on thicker metals..

A

1/8”

48
Q

Wire stick out for mig is…

A

3/8-3/4

49
Q

6 inert gases are…

A

Helium, argon, krypton, xenon, Radon, neon

50
Q

Argon + oxygen is for….

A

Welding alloyed steels, carbon steels, and stainless steels

51
Q

Argon + carbon dioxide is for….

A

Welding mild steel, low alloy steel and in some cases stainless steel

52
Q

Gas flow rate should be

A

35 cfh

53
Q

Replace v drive rollers with…

A

U shaped ones

54
Q

Minimize ______ whenever possible

A

Heat input

55
Q

______caused by pushing the wire past the leading edge of the puddle.

A

Whiskers

56
Q

Use ______ when welding up to 1”

A

Pure argon

57
Q

Use _________ when welding 1”-2”

A

90% argon 10% helium

58
Q

Produces better penetration

A

DCRP

Block 6 Mig/tig (2 decks)

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