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Welding - PowerPoint PPT Presentation

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Welding. What is Welding?. Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence.

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what is welding
What is Welding?
  • Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence.
  • This is often done by melting the work pieces and adding a filler material to form a pool of molten material that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself, to produce the weld.
what is it used for
What is it used for?
  • Welding process are used to fabricate a wide variety of objects.
  • Basic welding skills will always be useful for personal projects.
uses of welding
Uses of welding
  • Advanced welding skills are very marketable.
  • Welding is a popular way to produce art.
what do you need to know
What do you need to know?
  • Operate safety equipment and use safe work habits.
  • Weld components in flat, vertical, or overhead positions.
  • Ignite torches or start power supplies and strike arcs by touching electrodes to metals being welded, completing electrical circuits.
  • Clamp, hold, tack-weld, heat-bend, grind or bolt components parts to obtain required configurations and positions for welding.
  • Detect faulty operation of equipment or defective materials and notify supervisors.
  • Operate manual or semi-automatic welding equipment to fuse metal segments, using processes such as gas tungsten arc, gas metal arc, flux-cored arc, plasma arc, shielded metal arc, resistance welding and submerged arc welding.
  • Monitor the fitting, burning, and welding processes to avoid overheating of parts or warping, shrinking, distortion, or expansion of material.
  • Examine workpieces for defects and measure workpieces with straightedges or templates to ensure conformance with specifications.
  • Lay out, position, align, and secure parts and assemblies prior to assembly, using straight edges, combination squares, calipers, and rulers.
  • According to the US department of labor, a welder must be able to:


what abilities are required
What abilities are required?
  • According to the US department of labor a welder must have:
  • Arm-hand steadiness.
  • Near vision.
  • Control precision.
  • Manual dexterity.
  • Finger dexterity.
  • Multilimb coordination.
  • Oral expression.
  • Problem sensitivity.
  • Oral comprehension.
  • Selective attention..
four components of welding
Four Components of Welding
  • Metal
  • Heat
  • Filler material
  • Shielding
  • The difference between all welding process is the differences in these four components.