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? • Welding process are used to fabricate a wide variety of objects. • Basic welding skills will always be useful for personal projects.
Uses of welding • Advanced welding skills are very marketable. • Welding is a popular way to produce art.
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: www.onetonline.org/link/summary/51-4121.06
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 • Metal • Heat • Filler material • Shielding • The difference between all welding process is the differences in these four components.