Gas Metal Arc Welding (GMAW) Flashcards

Joins metal by heating them with electric arc established between a continuously fed filler metal electrode and the workpiece.

<p>Volts and wire speed.</p> Signup and view all the answers

<p>Will decrease penetration (C)</p> Signup and view all the answers

<p>Cause the wire to feed unevenly (B), Change the penetration of the weld (D)</p> Signup and view all the answers

<p>Cause gas flow turbulence, resulting in porosity and poor quality welds.</p> Signup and view all the answers

<p>Inadequate gas coverage (B)</p> Signup and view all the answers

<p>Porosity (A)</p> Signup and view all the answers

<p>Damage to the liner and contact tip (B)</p> Signup and view all the answers

<p>Wire feeder drive motor or the motor gearbox (D)</p> Signup and view all the answers

<p>Wire feed speed (D)</p> Signup and view all the answers

<p>Lack of gas coverage, wet shielding gas, excessive tip to work distance, excessive gas flow.</p> Signup and view all the answers

<p>Whiskers are lengths of unmelted electrode wire welded to and protruding from the root side of an open root groove weld.</p> Signup and view all the answers

<ol> <li>De-energize the power source and feeder, 2. Cut the wire at the back end of the cable liner, 3. Remove the contact tip, pull the wire through the gun and cable assembly, 4. Clean or replace the liner and/or contact tip, 5. Relieve tension on or remove the idler rolls, 6. Remove bird nested wire, check for damage to drive roll assembly, 7. Tie off wire to spool.</li> </ol> Signup and view all the answers

<p>Every time the wire spool is changed (B)</p> Signup and view all the answers

<p>Cut the kinked portion out and rejoin using manufacturer approved fittings (B)</p> Signup and view all the answers

<p>Loose cable connections, badly worn or dirty contact tip, loose work lead connection.</p> Signup and view all the answers

<p>An unstable arc (C)</p> Signup and view all the answers

<p>Increase gas flow, use wind break, spatter buildup from nozzle, leaks, kinks, disconnected or blocked gas lines, frozen regulators.</p> Signup and view all the answers

<p>Good ventilation (A)</p> Signup and view all the answers

<p>Ozone (D)</p> Signup and view all the answers

<p>Chlorinated degreasing solvents (C)</p> Signup and view all the answers

A welding process using a continuously fed filler metal electrode and an electric arc to join metals.

Another name for Gas Metal Arc Welding (GMAW), often used interchangeably.

The distance between the contact tip and the workpiece in GMAW.

The angle at which the welding gun is held relative to the workpiece in GMAW.

The metal droplets transferred from the electrode to the workpiece during GMAW.

A common GMAW defect caused by insufficient gas coverage or wet shielding gas, resulting in holes or voids in the weld.

The small, unmelted wire protrusions sticking out from the weld groove in GMAW.

The twisted wire clump that can form inside a GMAW gun when the wire spool runs out, requiring de-energizing and cleaning.

The internal tubing in a GMAW gun that guides the welding wire to the contact tip.

The part of a GMAW gun where the welding wire contacts the arc, creating a welding circuit.

The erratic movement of the welding arc that can be a sign of problems with the wire feed motor or gearbox.

A situation where the welding arc is unstable or inconsistent, leading to a poor weld.

An essential aspect of GMAW to ensure safety and quality, as it protects the molten weld from oxidation.

The process of ensuring appropriate ventilation during GMAW to remove harmful fumes and gases.

A high-energy radiation form emitted during GMAW, which can lead to health risks if not properly shielded from.

A chemical compound produced by the interaction of ultraviolet radiation with atmospheric oxygen, posing health risks in welding environments.

Cleaning agents used to remove grease and oil, which can produce harmful fumes, highlighting the importance of safety.

The improper penetration of the welding arc into the base metal, potentially caused by excessive stickout.

A GMAW defect characterized by increased arc voltage and a reduced wire feeding rate, potentially caused by a dirty contact tip.

The adjustment in a GMAW machine that controls the speed at which the welding wire feeds, influencing the welding parameters.

The voltage setting in a GMAW machine that determines the arc intensity and melting rate, impacting the welding parameters.

The distance between the contact tip and the workpiece, impacting penetration and shielding gas coverage in GMAW.