chapter 4 Flashcards

1
Q

Spliced Joint

A

A joint in which an additional workpiece spans the joint and is welded to each joint member

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2
Q

Fillet welds info?

A

Triangle cros section

(lap, T or corner joint)

Intermittently, staggered, or chained

Edge preparation are usually not required for fillet welding

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3
Q

Stud welds

A

Used mostly with Low carbon steel, stainless steel and aluminum

Most stud welds are round

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4
Q

Back Weld

A

applied after the front side weld

weld made in the back side a joint

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5
Q

Backing weld

A

is backing in the form of a weld

deposited before welding the front side

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6
Q

Surface welds

A

Welds applied to surface

Buildup
Buttering
Cladding
Hard facing

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7
Q

Surface welds - Buildup

A

Adding material to achieve a required dimension

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8
Q

Surface welds - Buttering

A

Provide metallurgical compatible weld metal for subsequent completion of a weld

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9
Q

Surface welds - Cladding

A

Improve corrosion or heat resistance

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10
Q

Surface welds - Hard facing

A

Reduce wear

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11
Q

Fusion

A

Melting together of the filler metal and the base metal

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12
Q

Penetration

A

the distance that the weld metal has progressed into the joint

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13
Q

Theoretical throat

A

The minimum amount if the weld that the designer counts on when originally specifying the weld size

The distance from the beginning of the joint root perpendicular to the hypotenuse

minimum distance minus convexity between the weld root and the face-off the fillet weld

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14
Q

Actual Throat

A

the shortest distance between the weld root and the face of the fillet weld

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15
Q

Stringer bead

A

Little or no side to side motion weld bead

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16
Q

Weave bead

A

Electrode moved side to side along the groove

17
Q

Boxing

A

the continuation of a fillet weld around a corner of a member as an extension of the principal weld

18
Q

Backstep sequence

A

Each weld pass is deposited in the direction opposite that of the overall progression of welding

19
Q

The Block sequence

A

Combined longitudinal and cross section

some parts are welded before the intervening increments are welded

Each subsequent layer is slightly SHORTER then that of the previous one so that is created a gentle slope

20
Q

Cascade Sequence

A

Combined longitudinal and cross section in which weld passes are made in overlapping layers

Each subsequent layer is slightly LONGER then that of the previous one

21
Q
Finish Modes
C
G
H
M
R
U
A
Chipping
Grinding
Hammering
Machining 
Rolling 
Unspecified
22
Q

The melt through symbol is used only when?

A

complete root penetration plus visible root reinforcement is required

The hight requirement of root reinforcement is specified left of the melt through symbol on the reference line

23
Q

Backing

A

Material or device placed on the backside of the groove

The material and the dimensions are specified in the tail

An r is placed in side if it need to be removed later

24
Q

Consumable Insert

A

Used with GMAW
used as special composition filler
Symbol is a square on the opposite side of the reference line
The class type is in the tail of the symbol

25
Q

Plug weld symbol

Left, Right, inside, Above/below ?

A

LEFT SIDE ex. 3/8
uses diameter to measure size

RIGHT SIDE ex. 1.5
Pitch is used for plug welds
RIGHT of Pitch - Spacing

Located under/over the symbol
Angle of countersink & number of welds

located inside symbol
Depth of filling
if omitted = the hole is to be completely filled

26
Q

SLOT WELD symbol

A

Uses width to measure size
ex. 6.25

RIGHT - length dimension also used 
RIGHT of length -  Spacing
LEFT -  width 
ABOVE/BELOW - Angle of countersink 
INSIDE - Depth of filling 

The location and origination of slow welds must be show on the drawling

27
Q

Spot WELD symbol

A

RIGHT - Spacing or pitch
LEFT - weld size
TOP/BOTTOM - # of spot welds

28
Q

Seam WELD symbol

A

RIGHT - Spacing or length
LEFT - weld size (width) / or strength
TOP/BOTTOM - # of spot welds

29
Q

Groove Weld symbol

A

RIGHT - length dimension also used
of length - Spacing

LEFT - Depth of bevel (s)
- Weld size

ABOVE/BELOW - groove angle

INSIDE - Root Opening

30
Q

Flare Groove welds

A

S(E)
S = Depth of bevel (radius)
E = Flare grove weld size