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PowerPoint ® Presentation Chapter 19 GMAW–Equipment Gas Metal Arc Welding GMAW Current Selection GMAW Welding Power Sources GMAW Equipment GMAW Welding Wire
Chapter 19GMAW–Equipment Constant-current (CC) power sources have a steep volt-ampere (V-A) curve, while constant- voltage (CV) power sources have a slightly sloping V-A curve.
Chapter 19GMAW–Equipment CV power sources are self-correcting with respect to arc length, which means that arc length remains constant with changes in electrode extension.
Chapter 19GMAW–Equipment GMAW equipment includes a welding gun cable and gun assembly, a wire feeder, shielding gas, and a workpiece lead with a workpiece connection.
Chapter 19GMAW–Equipment Welding gun components include a handle with a conductor tube and trigger, a contact tip, a gas nozzle, a gas diffuser, and an insulator.
Chapter 19GMAW–Equipment Welding guns are available with curved or straight conductor tubes.
Chapter 19GMAW–Equipment The wire feeder may be portable, mounted on the welding machine, or mounted elsewhere to facilitate welding in a large area.
Chapter 19GMAW–Equipment Drive roll grooves can be U-shaped, V-shaped, or knurled depending on the type of welding wire.
Chapter 19GMAW–Equipment The wire outlet guide must be aligned closely with the groove in the drive rolls, without touching it.
Chapter 19GMAW–Equipment Inert gases do not react readily with other materials, making them useful as shielding gases for arc welding.
Chapter 19GMAW–Equipment Different shielding gases produce different weld bead contour and penetration characteristics.
Chapter 19GMAW–Equipment The welding area should be protected with windbreaks to prevent gas drifts.
Chapter 19GMAW–Equipment The American Welding Society (AWS) classification system for carbon steel electrodes consists of a series of letters and numbers.
Chapter 19GMAW–Equipment The American Welding Society (AWS) has developed similar classification systems for metals other than carbon steel.
Chapter 19GMAW–Equipment Welding position and the type of metal to be welded are factors that must be considered when selecting welding wire.
Chapter 16 GMAW and FCAW: Equipment Assembly and Adjustment Miller Electric Mfg. Co.
1 Gas Metal Arc Welding (GMAW). Definition GMAW: A semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode.
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Gas Metal Arc Welding (Metal Inert Gas) (MIG) GMAW FUNDAMENTALS.
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1 Copyright 2004 Lincoln Global Inc. GAS METAL ARC WELDING GMAW(MIG/MAG)
Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Unit 26 Selecting and Using Arc Welding Equipment.
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GAS METAL ARC WELDING. DEFINITION Intense heat of an electric arc is used to melt filler material and base metal while a wire electrode is continuously.
Shielded Metal Arc Welding (SMAW). What is SMAW? SMAW often referred to as “stick” or “manual” welding. Metal rod covered with flux that provides the.
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Wire speed (Top Knob) Voltage (Middle Knob) Trigger, Over Temperature, and On/Off Switch Wire speed (amperage) controls weld penetration Voltage controls.
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Work to be welded is connected to one side of an electric circuit (the ground cable). A metal electrode is connected to the other side (the electrode.
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1 GMAW Principles. 2 GMAW Definition GMAW stands for Gas Metal Arc Welding A solid metal wire is fed through a welding gun and becomes the filler material.
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SMAW (Stick Welding). 2 SMAW Unit Topics During this overview, we will discuss the following topics: Safety SMAW Basics Equipment Set-Up Welding Variables.
SHIELDED METAL ARC WELDING. PROCESS Arc melts base metal and end of electrode. Melted electrode crosses arc and is deposited in the weld pool to form.
Grade 11 Welding Simulation Lesson COURSE CODE: WELDS1002 (STSENGS873) To identify MIG welding equipment and describe the welding procedure To identify.
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