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Welding Skills Chapter 3

Terms in this set (50)

base metal
metal or alloy that is to be welded.
electrode
component of the welding circuit that conducts electrical current to the weld area.
weld bead
weld that results from a weld pass.
weld pass
single progression of welding along a weld joint.
ripple
shape within the deposited bead caused by the movement of the welding heat source.
crater
depression at the termination of the weld bead.
depth of fusion
distance that fusion extends into the base metal from the surface melted during welding.
joint penetration
distance the weld metal extends from the weld face into the joint.
weld reinforcement
amount of weld metal in excess of that required to fill the joint.
root reinforcement
reinforcement on the side opposite the one on which welding took place.
face reinforcement
reinforcement on the same side as the welding.
root face
portion of the groove face within the joint root.
root opening
distance between joint members at the root of the weld before welding.
weld width
distance from toe to toe across the face of the weld.
weld toe
junction of the base metal and the weld face.
weld face
exposed surface of the weld bounded by the weld toes on the side which welding was done.
weld root
area where filler metal intersects the base metal and extends the furthest into the weld joint
actual throat
shortest distance from the face of a fillet weld to the weld root after welding.
effective throat
minimum distance between the weld face and the weld root.
theoretical throat
distance from the joint, perpendicular to the hypotenuse of the largest right-angle triangle that can be inscribed within the cross section of a fillet weld.
weld leg
distance from the joint root to the toe of a fillet weld.
filler metal
metal deposited in a welded, brazed, or soldered joint during welding process.
fusion welding
melting of metal and filler metal, or filler metal only, to make a weld.
joint root
portion of a weld joint where joint members are closest to each other.
root bead
weld bead that extends into or includes part or all of the joint root.
root pass
initial weld pass that provides complete penetration through the thickness of the joint member.
weld joint
physical configuration at the juncture of the members to be welded.
butt joint
weld joint in which two members are set approximately level to each other and are positioned edge-to-edge.
T-joint
weld joint formed when two members are positioned approximately 90 degrees to one another in the form of a T.
lap joint
weld joint between two overlapping members in parallel planes.
corner joint
joint formed when two members are positioned at an approximate right angle in an L shape.
edge joint
weld joint formed when the edges of two or more parallel, or nearly parallel, members are joined.
flanged joint
edge joint in which one of the joint members has a flanged edge at the weld joint.
weld type
cross-sectional shape of the weld. Determined by the weld joint design and depends on the load requirements of the weld.
fillet weld
weld of approximately triangular cross section that joins two surfaces at approximately right angles.
groove weld
weld made in the groove between two members to be joined.
single-groove weld
groove weld made from one side of the joint only.
double-groove weld
groove weld made from both sides of the joint.
plug weld
weld made in a circular hole in one member to fuse it to the other member.
slot weld
weld made in an elongated hole in one member to fuse it to the other member.
surfacing weld
weld applied to a surface, as opposed to making a joint, to obtain the desired properties or dimensions.
stud weld
weld produced by joining a metal stud or similar part to a member.
spot weld
weld with an approximately circular cross section made between or upon overlapping members.
seam weld
continuous weld made between or upon overlapping members that produces a continuous seam or series of overlapping spot welds.
faying surface
surface of a joint member that is in contact with, or in close proximity to, the member to which it will be joined.
projection weld
resistance weld produced by the heat obtained from the resistance to the flow of welding current.
back weld
weld made in the weld root opposite the face of the weld.
tack weld
weld used to hold members in proper alignment until the welds are made.
fixture
device used to maintain the correct positional relationship between weldment components as required by print specifications.
positioner
mechanical device that supports and moves weldments for maximum loading, welding, and unloading efficiency.
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