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Cold Metal Skills

Cold Metal Skills. 6831.24. 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.

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Cold Metal Skills

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  1. Cold Metal Skills 6831.24

  2. Skills Needed for Cold Metal Tasks

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

  4. Cutting Cold Metal • Done to make it the correct size: length and width

  5. Thin Metal • Cutting thin cold metal is done by using snipes, shears, or a cold chisel

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

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

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

  9. Bending Metal • Metal thicker than 3/8” should be heated before bending

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

  11. Filing • The main reason to file metal is to smooth rough places, but filing is also used to sharpen some tools

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

  13. Demonstrating Cold Metal Skills

  14. Ferrous • Contain iron

  15. Ferrous Metals • Will rust and have to be painted or oiled to protect

  16. Ferrous Metals • Cast iron • Wrought iron • Steel

  17. Non-ferrous • Do not have iron

  18. Nonferrous Metals • Aluminum • Copper • Magnesium

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

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

  21. Spark Test • Color, shape, quantity, length, and position of sparks are used to identify metals

  22. Cast Iron • Has red lines in the sparks

  23. High Carbon Steel • Has yellow lines with several star bursts

  24. Wrought Iron • Has long straw-colored lines without burst

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

  26. Snips or Shears • Will not cut metal that is too thick

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

  28. Drilling Metal • Done by securing metal in a machinist’s vise

  29. 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

  30. Drilling Metal • Using a drill and bit to drill the hole

  31. Machinist’s vise • Should be used to secure cold metal for cutting, drilling, filling, or bending

  32. Round File • The inside of a drilled hole should be smoothed with a round file

  33. Flat File • Can be used to smooth the cut edges of cold metal

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