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Elements and Performance Criteria

  1. Plan and prepare to carry out advanced GMAW
  2. Weld using GMAW welder
  3. Check welds
  4. Complete work processes
  5. Plan and prepare to carry out advanced GMAW
  6. Weld using GMAW welder
  7. Check welds
  8. Complete work processes

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Welding information must include:

GMAW equipment operating procedures

national standards and codes of practice for welding

OEM or authorised agency standards

workplace procedures.

Tools and equipment must include:

PPE

GMAW standard or inverter welders

GMAW consumables and materials

approved welding helmets

welding protective screens and fume extraction system.

Safety and environmental requirements must include:

work health and safety (WHS), and occupational health and safety (OHS) requirements, including procedures for:

selecting and using PPE when working with GMAW equipment, including approved welding helmet

using specialist welding tools and equipment

using protective screens and fume extraction system

manually handling vehicle components and GMAW equipment

identifying and controlling hazards

environmental requirements, including procedures for trapping, storing and disposing of waste materials.


Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standard defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

use gas metal arc welding (GMAW) equipment to carry out the following welds:

three butt welds to 0.8 mm and 1.2 mm panel steel in the following positions:

down hand

vertical

horizontal

two lap welds to 0.8 mm and 1.2 mm panel steel in the following positions:

vertical

horizontal

three plug welds to 0.8 mm and 1.2 mm panel steel in the following positions:

down hand

vertical

horizontal

two butt welds on dissimilar material thickness 0.8 mm to 1.2 mm panel steel in the following positions:

down hand

horizontal.


Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS), and occupational health and safety (OHS) requirements relating to carrying out advanced GMAW on vehicle body sections, including procedures for:

selecting and using personal protective equipment (PPE) when working with GMAW equipment, including approved welding helmet

using specialist welding tools and equipment

using protective screens and fume extraction system

manually handling vehicle components and GMAW equipment

identifying and controlling hazards

environmental requirements, including procedures for trapping, storing and disposing of waste materials

GMAW equipment manufacturer operating procedures

original equipment manufacturer (OEM) or authorised agency welding standards

material and consumable preparation techniques, including characteristics of different metal types, including high strength steels (HSS)

procedures for setting up and operating GMAW equipment

methods and techniques for advanced GMAW, including:

GMAW silicone bronze process

weld speed

weld angle

weld distance

welding positions

welding of dissimilar metal thicknesses

distortion control techniques

GMAW testing, including:

non-destructive inspection

destructive testing

identification and rectification of weld defects, including:

porosity

lack of penetration

excessive weld build-up

excess heat

undercut

weld distortion

heat affected zone

procedures for safeguarding vehicle electronics during GMAW

post-weld inspection procedures.