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
Ferrous Metals Will rust and have to be painted or oiled to protect
Ferrous Metals Cast iron Wrought iron Steel
Non-ferrous
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
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
Cold Metal Skills
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