AURVTW001
Carry out manual metal arc welding on components


Application

This unit describes the performance outcomes required to prepare and weld components using the manual metal arc welding (MMAW) process. It involves preparing for the task, selecting, setting up and operating MMAW equipment, identifying and selecting welding electrodes appropriate to welding requirements, selecting and using suitable personal protective equipment (PPE), performing welding to required standard and specifications, inspecting weld quality, and completing workplace processes and documentation.

It applies to those working in the automotive service and repair industry.

No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.


Elements and Performance Criteria

Elements

Elements describe the essential outcomes.

Performance Criteria

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.

1. Plan and prepare to weld component

1.1 Job requirements are determined from workplace instructions

1.2 Welding electrodes, weld size, type and sequence, and quantity of materials are identified

1.3 Hazards associated with the work are identified and risks are managed

1.4 Tools and equipment are selected and checked for serviceability

1.5 Work is planned to minimise waste and use time efficiently

2. Weld materials using MMAW

2.1 Welding equipment is set up and used according to workplace procedures and safety and environmental requirements

2.2 Distortion prevention measures are identified and adjusted as required

2.3 Test runs are conducted according to workplace instructions and quality requirements

2.4 Materials are welded using MMAW process to required specifications

3. Check welds

3.1 Weld quality and specifications are confirmed by non-destructive inspection

3.2 Weld defects are identified, prepared for re-welding as required, and appropriate personnel are notified

4. Complete work processes

4.1 Final inspection is made to ensure work meets workplace expectations and component is presented ready for use

4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected and stored

4.3 Tools and equipment are checked, reported if faulty, and stored according to workplace procedures

4.4 Workplace documentation is processed according to workplace procedures

Evidence of Performance

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:

carry out manual metal arc welding (MMAW), including:

three bead runs, 150 mm long

three pad welds, 150 mm long

three butt welds, 150 mm long

three lap welds, 150 mm long.


Evidence of Knowledge

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS), and occupational health and safety (OHS) requirements relating to carrying out manual metal arc welding on components, including procedures for:

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

using specialist welding tools and equipment

using protective screens and fume extraction system

manually handling components and MMAW equipment

identifying and controlling hazards

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

hazards associated with MMAW, including:

arc eye and exposure to ultraviolet light

metal vapours, welding electrodes and welded components

molten metal spatter and fire danger

distortion control techniques, including:

bracing

pre-setting

tacking

bolting

clamping

jigs and fixtures

material preparation techniques, including characteristics of different metal types

procedures for setting up and operating MMAW equipment

methods and techniques for MMAW, including:

weld specifications

basic welding symbols

types of welding electrodes and their application

protection of vehicle electronics

weld inspection

identification and rectification of weld defects

procedures for final inspection and testing of welded components.


Assessment Conditions

Assessors must satisfy NVR/AQTF assessor requirements.

Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.

Assessment must include direct observation of tasks.

Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the MMAW that they have carried out, e.g. work orders.

Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.

The following resources must be made available:

automotive repair workplace or simulated workplace

workplace instructions

PPE required for MMAW

components to be welded as specified in the performance evidence

welding materials and consumables

MMAW equipment and operating instructions

tools, equipment and materials appropriate for carrying out MMAW.


Foundation Skills

This section describes those language, literacy, numeracy and employment skills that are essential to performance and are not explicit in the performance criteria.

Skills

Description

Learning skills to:

locate appropriate sources of information efficiently.

Writing skills to:

legibly and accurately fill out workplace documentation.

Oral communication skills to:

clarify instructions and procedures

clearly report quality issues and job outcomes.

Numeracy skills to:

identify and set welding machine settings

identify welding rod specifications.

Planning and organising skills to:

plan own work requirements and prioritise actions to achieve required outcomes and ensure tasks are completed within workplace timeframes.

Problem solving skills to:

identify weld defects, quality issues and potential problems associated with MMAW process and refer problems to appropriate person.

Technology skills to:

use specialist MMAW equipment.


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.

Tools and equipment must include:

PPE

MMAW equipment

MMAW electrodes and materials

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 MMAW equipment, including approved welding helmet

using specialist welding tools and equipment

using protective screens and fume extraction system

manually handling components and MMAW equipment

identifying and controlling hazards

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


Sectors

Technical - Welding, Grinding, Machining and Soldering


Competency Field

Vehicle Body