Welding 10, 20, A30, B30
WLDG14
Module 14: Shielded Metal Arc Welding Procedures and Equipment (Core)
Outcome
Demonstrate a knowledge of and expertise with electric arc welding equipment including common types of electrodes, currents, and welding positions while using the correct terminology.
Indicators
| (a) | Define and appropriately use terminology related to electric arc welding including alternating current, ampere, anode, arc, backing or backup, backhand welding, backstep welding, base metal, bead, bevel, brazing, capillary attraction, cathode, chipping, circuit, complete penetration, contraction, constant current, cover glass, crater, direct current, distortion, downhand welding, ductility, duty cycle, elasticity, electrode circuit, expansion, ferrous, finished bead, finished surface, flux, forehand welding, fusion welding, gaseous shield, generator, kerf, non-ferrous, parent metal, peening, penetration, polarity, porosity, rectifier, root opening, slag, solder, spatter, strain, stress, tensile strength, transformer, uphand welding, voltage, warping, yield point, and yield strength. |
| (b) | Describe the differences in welding electrodes such as 6011, 6013, 7014, and 7018. |
| (c) | Categorize and explain the uses of direct current with straight and reverse polarity. |
| (d) | Categorize and explain the difference between alternating current and direct current with straight and reverse polarity. |
| (e) | Demonstrate start-up and shut-down procedures as well as striking the arc, setting and adjusting amperage, correct electrode angle, and appropriate rate of travel. |
| (f) | Compile a list of specialty electrodes including those used for stainless steel, aluminium, nickel, and hard surfacing. |
| (g) | Identify situations where flat, horizontal, vertical, and overhead positions would be used. |
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