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.

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Antra AH5-350-001X Solar Power Auto Darkening Welding Helmet Carbon Fibre with AF350 Large Viewing Size 3.78X2.07 Variable Shade 4/9-13 with Grinding Feature Extra lens cover Good for Arc Tig Mig Plasma CSA / ANSI Certified By Colts Lab


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The TAB Guide to DIY Welding: Hands-on Projects for Hobbyists, Handymen, and Artists


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GET STARTED WITH METAL INERT GAS (MIG) WELDING! A practical guide with step-by-step instructions and hands-on projects for newcomers to metalwork and MIG welding The TAB Guide to DIY Welding shows you how to get started with MIG welding and metalworking. Inside, you’ll find illustrated step-by-step instructions for making useful objects for around the home, as well as fun artistic projects. This e…

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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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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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Description:
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The Lotos LTP5000D Pilot Arc Plasma Cutter is a compact, portable machine that uses non-hazardous compressed air from an air compressor (sold separately) to cut through stainless steel, alloy steel, mild steel, copper and aluminum. The pilot arc torch cuts through material without making contact, which is ideal for rough, painted, and rusty surfaces. The pilot arc cuts efficiently, producing minim…







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