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Welding
Chapter 8
42
Other
12th Grade
11/11/2013

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Term

aluminum electrode wire

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Definition
classified by series according to the metals the aluminum is alloyed with, and whether the aluminum is heat treated. Does not indicate the strength of the electrode
Term
brazing
Definition
welding in which nonferrous metal with a lower melting point than the base metal is melted and spread between two base metals to form a strong bond
Term

burn mark

 

Definition
An indication of a good weld penetration found on the back of a weld. Also mark on paint from improper machine welding.
Term
burn-through
Definition
A hole through the back side of the weld, which indicates too much penetration into the lower base metal. Also an unwanted mall in paint from improper use of the buffer.
Term

carburizing flame

 

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Definition
A flame obtained by mixing slightly more acetylene than oxygen, used for welding nickel, aluminum, and other alloys; also called surplus or reduction flame.
Term

continuous weld

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Definition
welding with an uninterrupted seam in a slow, steady, ongoing movement.
Term
DC reverse polarity
Definition
When the electrode is positive and the work piece is negative; the greatest welding penetration is produced at this connection.
Term
destructive check
Definition
A way to examine whether a weld is satisfactory by working on a test piece of the same metal and thickness as the panel, then separating it to see how cleanly the weld comes apart.
Term
electronic shielding
Definition
Protection used when welding near on-board computers and sensor wirong
Term

flat welding

 

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Definition
Welding with pieces of metal parallel with the bench or shop floor; fast and easy welding with the best penetration.
Term
fusion welding
Definition
Pieces of metal are heated to the melting point, joined together with a filler rod, and allowed to cool.
Term

heat crayons

 

Definition
Thermal paint used to determine the temperature of aluminum or other metal being heated.
Term
heat effect zone
Definition
Area around the weld that becomes hot; should be kept to a minimum to prevent panels from warping or parts from being damaged.
Term
heat sink compound
Definition
A clay-like material that reduces the heat effect zone and prevents warping.
Term

horizontal welding

 

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Definition
Welding with pieces of metal turned sideways.
Term

insert

 

Definition
A piece of metal made of the same metal as the base metal that can be placed behind the weld; also called a backup strip.
Term
joint fit-up
Definition
Holding pieces in alighnment before welding.
Term

lap weld

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Definition
A weld made along the top edge of an overlapping piece.
Term

metal inert gas (MIG) welding

 

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Definition
Gas-shielded metal arc welding.
Term

neutral flame

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Definition
A standard flame achieved by mixing acetylene and oxygen in a 1 to 1 ratio by volume.
Term
nondestructive test
Definition
Procedure to confirm a spot weld after it has been made using a chisel and a hammer to confirm quality.
Term

overhead welding

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Definition
Welding with the pieces upside down or over your head, the most difficult position.
Term
oxidizing flame
Definition
A flame obtained by mixing slightly more oxygen than acetylene, used for welding brass and bronze.
Term

plasma arc cutting

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Definition
A cutting process in which metal is severed by melting a localization area with a constructed arc and removing molten material with a high velocity jet of hot, ionized gas issuing from an orifice.
Term

plug weld

 

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Definition
Adding metal into a hole and fusing all metal.
Term
pressure welding
Definition
Heating metal with electrodes and joining them by applying pressure.
Term

spot weld

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Definition
Weld in which arc is directed to penetrate both pieces of metal, while triggering a timed impulse of wire feed.
Term

stitch weld

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Definition
Intermittent welds used to join two or more parts.
Term

tack weld

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Definition
A temporary spot weld used before making a permanent weld instead of a clamp or metal screw.
Term
tungsten inert gas(TIG)
Definition
Gas-shielded tungsten electrode arc welding.
Term
undercutting
Definition
Welding the surface a level lower than the base metal, thereby creating groove.
Term

vertical welding

 

 

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Definition
Welding with the pieces of metal turned upright or in up and down position.
Term
weld face
Definition
The exposed part of the weld on the welded side.
Term
welding
Definition
Joining two metal or plastic pieces together by bringing them to their melting points, often involving the use of a welding rod to add metal or plastic to a joint.
Term
welding blankets
Definition
thick covers made of fire-resistant cloth for protecting vehicle surfaces from heat, sparks, and weld splatter.
Term
welding current
Definition
An electrical current increases, the penetration depth, melting speed, arc stability, amount of weld splatter, excess metal height, and bead width also increase.
Term
welding filter lens
Definition
A shaded glass welding helmet insert used to protect eyesight; also called a filter plate.
Term
weld legs
Definition
Width and height of a weld bead.
Term
weld penetration
Definition
Indicated by the height of the exposed surface of a weld on the back side.
Term
weld root
Definition
The part of the joint where the electrode is directed.
Term
weld throat
Definition
The depth of the triangular cross section of a weld.
Term
weld throat
Definition
The depth of the triangular cross section of a weld.
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