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WELDING SYMBOLS
- · Butt Joint:
- · BEAD:
A type of weld created
by one or more string or weave beads deposited on an unbroken plane
- · FILLET:
Type of weld,
approximately triangular cross section joining two surfaces at approximately
exact angles to each other.
- · PLUG:
A circular fusion weld
through in the hole of a slotted lap or tee joint.
- · SQUARE:
A type of groove weld
with a small separation at the edges of the base metal parts.
- · V-GROOVE:
A groove weld in which
the joint edge of each member is beveled from the similar side.
- · U-GROOVE:
A groove weld in which
the joint edge of both members is equipped in the form of a J from one side,
giving a final U form to the fulfilled weld.
- · J-GROOVE:
A type of groove weld
in which one member has a joint edge in the form of a J from one part.
- FLARE V:
A type of groove weld,
generally used to join two round or curved parts.
- · FLARE BEVEL:
A type of groove weld,
generally used to join a round or curved piece to a level piece.
- · SEAM:
A type of welding,
continuous weld made between or upon overlapping metal parts.
- · BACK:
A type of weld deposited
at the back of a single groove weld.
- · SURFACING:
A type of weld which
consists of one or more stringer beads or weave beads deposited on an steady
surface in order to create desired dimensions or properties.
- · EDGE:
A weld that is
improperly positioned compared to current work piece design. Edge welds are
those welds that stroke or extend beyond the edge of the work piece.
- · CORNER:
A type of joint between
two metal parts located at exact angles to one another. It requires large
amounts of weld metal.
- · FIELD WELD:
Fillet Welded Joints are just
another terminology for corner, lap, and tee joints. Fillet Welded Joints
are the most common type of welding joint and accounts for nearly 75% of joints
made with arc welding. You do not need to prepare the edge and this type of
joint make it easy to weld piping systems. Butt welds are more expensive than
fillet welds. Fillet welds are mostly used in piping systems to join pipe to
socket joints.
- · CONCAVE:
A type of fillet weld
having a concave surface.
- · CONVEX:
A type of fillet weld
having a convex surface.
- · WELD ALL AROUND:
A type of weld in which
a specimen being weld from all its specific sides.
- · MELT-THROUGH:
A type of weld, melt-through is the penetrated weld metal that extends beyond
the base metal on the backside of a joint welded from the opposite side.
- · LAP WELD:
Lap welding joints are used most
often to joint two pieces with differing thicknesses together. Also
considered a fillet type, the weld can be made on one or both sides. A
Lap Joint is formed when 2 pieces are placed in an over lapping pattern on top
of each other.
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ReplyDeleteElectric resistance welding
ReplyDeleteThe world owes the invention of electric resistance and spot welding to Englishman Elihu Thomson. This engineer has several patents in the field of spot welding to his name.
Electric resistance welding consists in assembling by autogenous fusion the parts to be welded under the pressure of two metal parts. Who says welding says heat, with resistance welding the heat necessary for welding is provided by the Joule effect (which is the thermal manifestation of electrical resistance, this heat occurs when an electric current passes through any material conductor) of a current of high intensity and low voltage, passing through the parts to be assembled. Indeed, it takes a lot of amps and little voltage. The application of a forging force makes it possible to ensure the metallic interpenetration.
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