Cold Metal Skills Skills Needed for Cold Metal Tasks



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Cold Metal Skills


Skills Needed for Cold Metal Tasks



Identify Metal

  • Identify metal so that its characteristics will be known before trying to do other cold metal and welding tasks



Cutting Cold Metal

  • Done to make it the correct size: length and width



Thin Metal





Thick Metal

  • Cutting thick cold metal is done with a hacksaw or a metal cutting saw blade in band saws, jigsaws, or reciprocating saws











Drilling

  • The method used to make round holes in cold metal using drills and metal cutting bits



Bending Metal

  • Bending cold metal not more than 3/8” thick can be done with a ball peen hammer and machinists vise





Bending Metal



Shaping Cold Metal

  • Shaping cold metal can be done by cutting, filing, grinding, or bending or combining any of these skills



Filing



Grinding

  • Grinding is the procedure used to sharpen points or edges of cutting tools made of high carbon steel





Demonstrating Cold Metal Skills



Ferrous

  • Contain iron



Ferrous Metals

  • Will rust and have to be painted or oiled to protect



Ferrous Metals

  • Cast iron

  • Wrought iron

  • Steel



Non-ferrous

  • Do not have iron



Nonferrous Metals

  • Aluminum

  • Copper

  • Magnesium



Identify Metal

  • Identify metal so that its characteristics will be known before trying to do other cold metal and welding tasks



Metal Identification

  • Identified by color, weight, texture, use, shape, forge or cast marks, and spark test



Spark Test

  • Color, shape, quantity, length, and position of sparks are used to identify metals



Cast Iron







High Carbon Steel

  • Has yellow lines with several star bursts





Wrought Iron

  • Has long straw-colored lines without burst





Galvanized Steel

  • Should be identified because it gives off poisonous gas when heated for cutting or welding







Snips or Shears





Thick Metal

  • Should be cut with a metal cutting saw such as hacksaw, band saw, or abrasive cut-off saw (chop saw)



Drilling Metal

  • Done by securing metal in a machinist’s vise



Drilling Metal

  • Using a center punch and ball peen hammer to dent the metal to prevent the drill bit from wandering from the desired location





Drilling Metal

  • Using a drill and bit to drill the hole



Machinist’s vise

  • Should be used to secure cold metal for cutting, drilling, filling, or bending





Round File

  • The inside of a drilled hole should be smoothed with a round file



Flat File

  • Can be used to smooth the cut edges of cold metal





Grinder

  • Used to shape and sharpen the hollow-ground cutting edge of tools such as wood chisels





Alloy

  • A mixture of two or more metals



Steel



Mild Steel

  • Known as the workhorse of steels



Mild Steel

  • Used to make expanded metal



Stainless Steel

  • Will not rust



Cold Metal Skills





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