Objective 02: Weld Joints and Weld Types Flashcards
What are the 5 basic joint types?
- Butt
- Lap
- Tee
- Corner
- Edge
What is this weld joint?
Butt Joint
What is this weld joint?
Lap Joint
What is this weld joint?
Edge Joint
What is this weld joint?
Tee Joint
What is this weld joint?
Corner
When are Groove Welds used?
When the surfaces being joined are butted against each other in such a way that a groove is created.
Groove Weld
Weldment created in a groove
What preparation is necessary in order to create a Groove Weld?
The joining surfaces of one or both pieces are prepared using grinding, flame cutting, or some other means.
What is this butt weld joint?
Double V
What is this butt weld joint?
Bevel
What is this butt weld joint?
J
What is this butt weld joint?
U
What is this butt weld joint?
Square
What is this butt weld joint?
Double-U
What is this butt weld joint?
Flare-Bevel
What is this butt weld joint?
Scarf
What is this butt weld joint?
Flare-V
What is this butt weld joint?
V
Describe a V-Groove
The 2 surfaces are machined flat and smooth at an angle (bevel). When the 2 surfaces are placed together, they form a single “V” shape. In some cases, the root of the “V” does not extend to the bottom surface of the material.
Describe a Double V-Groove
The edges are beveled from both sides. When placed together, the 2 pieces form a “V” on both sides. Both sides are then welded.
Describe a Bevel Groove
One edge is beveled and the other is flat
Describe Square Groove
Both edges are flat at 90 degrees. This creates a bottomless groove, formed by slight separation of the pieces
Describe U-Groove
Both edges are machined with a curvature that produces a “J” cross-section. When placed together they form a groove with a “U” contour
Describe Doube U-Groove
Each piece is machined with a “J” contour from both sides. When brought together the edges form a “U” groove on each side. Welding is done on both sides.
Describe J-Groove
One piece is machined from one side only with a “J” contour, while the other is flat at 90 degrees
Describe Scarf Groove
The joining edges are machined flat, but at an angle
Describe Flare-V Groove
2 surfaces with curved profiles are brought together to form a weld groove with curved sides
Describe Flare-Bevel Groove
One edge has a curved profile, while the other is flat at 90 degrees
What is the (numeric) term for this weld?
Single Groove
What is the (numeric) term for this weld?
Double Groove
Label this:
a. Weld Depth
b. Root Opening
Label this:
a. Reinforcement
b. Melt Through
Label this:
a. Groove Angle
b. Groove Depth
Weld Root
The bottom edge of a weld or the deepest point of a weld
Root Opening
The space intentionally left between joined surfaces before welding which is also visible when the weld does not fully penetrate the material
Weld Depth
The distance from the surface of the material to the root of the weld
Reinforcement (Welding)
The specified height of the weld above the surface of the material
Melt Through (Welding)
The thickness of weld, measured from the root of the weld to the material surface, when the root extends beyond the surface
When are Fillet Welds used?
When the configuration of the joining pieces creates 2 weld surfaces, which are 90 degrees to each other
Fillet Weld
Weld deposited into a 90 degree joint and assumes a somewhat triangular cross-section.
All-Around/Box Weld
A continuous fillet weld, used to weld a vertical post to a flat plate, that travels around corners
What kind of Fillet Weld is this?
All-Around/Box Weld
Label this:
a. Throat
b. Toe
c. Leg
When are Staggered Intermittent Fillet Welds used?
Where the strength of the joint is not crucial or where complete sealing of the joint is not necessary
What must a welder know in order to successfully produce Staggered Intermittent Fillet Welds?
The lengths of the individual welds and the pitch.
Pitch (Welding)
The distance between the mid point of adjacent welds.
Are intermittent welds always staggered?
No
Label these measuerments:
a. Pitch
b. Length
Plug and Slot Welding
The joining of 2 relatively flat pieces with a series of small welds that are deposited into drilled plugs or machined slots in 1 piece.
When Plug and Slot Welding, what characterizes the piece with the holes and the holes?
- Piece is usually thin
- Sides of the hole may be bevelled or perpendicular
How does a Welder know how deep the welds must be within the plugs and slots when Plug and Slot Welding?
Information provided on the Welding Symbol
What type of weld is this?
Plug Welds
What type of weld is this?
Slot Weld
