Plasma Arc Welding

2 January 2011

How does welding work?

how does a MIG Weld work?
how does a Arc or Stick weld work?
how does an Oxy Acetylene weld work?
How does the plasma cutter work?

A MIG welder (Metal – Inert Gas) passes a current through a continuously fed solid core wire which strikes an arc against the substrate. The wire feed gun head floods the wire end with an inert gas such as Argon to shield the weld area. The arc melts the wire and heats the substrate forming a welding puddle which the welder advances to build a finished weld.

Arc/Stick welding uses a fixed rod which is coated in a solid flux to strike an arc with the substrate. The heat of the arc melts the flux agent which floats on the top of the weld puddle shielding it from oxygen. The welder advances the stick and puddle to build the finished weld.

Oxy Acetylene welding uses a neutral flame formed by combusting Acetylene gas wth Oxygen. A flame of about 6000degF is formed. The heat of the flame melts the substrate and forms a puddle which fills the weld gap forming a finished weld. A welder can add a filler rod if needed to improve weld quality.

A plasma cutter forms an arc in a nozzle which heats a high speed pressurized stream of inert gas, often Nitrogen or Argon, ( occasionally non-inert Oxygen) which impinges on a workpiece. The imense heat of the plasma (15,000 degC typical) melts and oxidizes the substrate and blows the debris clear of the work.

Astrobuf


Welder's Handbook, RevisedHP1513: A Guide to Plasma Cutting, Oxyacetylene, ARC, MIG and TIG Welding


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A newly-updated, state-of-the-art guide to MIG and TIG arc welding technology. Written by a noted authority in the field, this revised edition of HP’s bestselling automotive book-for over 20 years-is a detailed, instructional manual on the theory, technique, equipment, and proper procedures of metal inert gas (MIG) and tungsten inert gas (TIG) welding….

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Now nearing its 30th year of publication, WELDING: PRINCIPLES & APPLICATIONS (WP&A), 7th Edition is the authoritative introduction to the subject of welding. It’s designed for students in a wide range of academic and workforce training programs who want to pursue careers as skilled welders and welding supervisors. The text also supports the needs of learners who need to achieve a basic level of pr…

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Antra AH6-260-0000 Solar Power Auto Darkening Welding Helmet with AntFi260 Wide Shade Range 4/5-9/9-13 with Grinding Feature Extra lens covers Good for Arc Tig Mig Plasma CSA/ANSI Certified By Colts Lab


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**This welding helmet is designed for Arc welding or cutting processes such as MIG,MAG,TIG,SMAW and Plasma Arc.****In event of electric failure, the welder remains protected against UV and IR radiation according to shade 16.** **Fully automatic power ON/OFF ** **Cheater Lens Compatible****Continuously adjustments for delay time and sensitivity control ** **Very light design for comfort, o…







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This heavy duty MIG welding cart features: 3 Shelves for easy access to supplies, 18″ x 10.5″ top deck, Holds 9 1/2″-Diameter tank, Industrial powder coating resists chips and rust, Built in cylinder rack and storage tray, Heavy duty casters; 2 fixed and two swivel, Cart measures 28″-L x 12″-W x 28″-H,100 lb. weight capacity…

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Features & Benefits
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Function 1: DC TIG 120 A

• Gas post flow time: saves the tungsten electrode against excessive wear and protects the weld from oxidation.

• HF Ignition: high-frequency contactless ignition to the metal.

Function 2: Air Plasma CUT- 30

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