NZQA Expiring unit standard
3884 version 9
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Title
Demonstrate knowledge of and use a MIG welding plant in the motor
body industry
Level
2
Credits
4
Purpose
This unit standard is for people who are at pre-employment
level or who have recently started work in the motor body
industry. People credited with this unit standard are able to
demonstrate knowledge of the MIG welding process in the
motor body industry, and MIG weld two pieces of metal at least
20 cm long under supervision.
Classification
Motor Industry > Vehicle Bodywork
Available grade
Achieved
Explanatory notes
Version 5 of this unit standard was published in July 1999 following a correction to
outcome 2 (insertion of the word ‘metal’).
1
The following legislation (and subsequent amendments) are applicable to this unit
standard and must be followed where applicable:
– Health and Safety in Employment Act 1992.
2
Company policy includes workplace standards, practices, and procedures, which
must comply with current legislation requirements. It is assumed the policy also
meets product manufacturers' specifications, recommendations, and standards.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of the MIG welding process in the motor body industry.
Evidence requirements
1.1
Purpose and advantages of MIG welding are identified.
Range
range of metals, penetration, versatility of use, visible arc, weld
appearance, welding speed, operator ease of use, heat effect
zone.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
1.2
Principle of how a MIG welder works is identified according to manufacturer‘s
specifications.
Range
1.3
power source, welding gun, wire feed unit, controls and leads,
shielding gas and associated system, electrode wire.
Welding procedure is identified according to manufacturer‘s specifications and
company policy.
Range
1.5
producing heat for welding, the wire drive system operation,
transferring the current from the power source and producing the
arc, gas shielding.
The equipment required for MIG welding is identified according to
manufacturer’s specifications.
Range
1.4
3884 version 9
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stick-out length, travel speed, nozzle angle.
Welding faults and causes are identified according to company policy.
Range
undercutting, lack of penetration, lack of fusion, porosity,
excessive splatter, irregular weld shape.
1.6
Effect of MIG welding on vehicle electronics is identified according to
manufacturer’s specifications.
1.7
Manufacturer‘s instructions are identified to establish manufacturer’s
specifications for use.
1.8
Safety precautions required for MIG welders are identified and explained
according to the manufacturer‘s specifications and company policy.
Outcome 2
MIG weld metal pieces of under supervision.
Range
butt weld, fillet, lap, plug;
two pieces of metal at least 20 cm long.
Evidence requirements
2.1
MIG welder is set up according to manufacturer’s specifications and company
policy.
2.2
Metal is prepared for welding according to manufacturer‘s specifications and
company policy.
Range
no contaminants on the surface to be welded, abutting ends
square, suitable gap between joint edges, metal positioned
securely.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3884 version 9
Page 3 of 4
2.3
Heat shielding of adjacent vehicles, tools and machine components is carried
out to prevent any damage and risk of fire and explosion.
2.4
The metal is welded in position according to the manufacturer’s specifications
and company policy.
Range
2.5
no undercutting, no sign of porosity, full penetration, consistent
width and height, neat appearance, minimum of 3.00 mm
distortion.
Safe working practices are carried out throughout the task.
Range
2.6
personal safety, safety to others, tools and equipment safety.
Welding equipment is shut down after use and put away according to
manufacturer‘s instructions and company policy, with no damage to equipment
or injury to people.
Range
gas shut off, power leads disconnected, stored in a safe place.
Replacement information
This unit standard has been replaced by unit standard
21683 and unit standard 21684.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
18 June 1995
31 December 2016
Revision
2
30 October 1997
31 December 2016
Revision
3
28 May 1998
31 December 2016
Review
4
10 February 1999
31 December 2016
Revision
5
29 July 1999
31 December 2016
Revision
6
13 March 2001
31 December 2016
Rollover
7
25 July 2006
31 December 2016
Rollover
8
19 November 2010
31 December 2016
Rollover
9
18 February 2016
31 December 2020
Consent and Moderation Requirements (CMR) reference
0014
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3884 version 9
Page 4 of 4
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, or
an inter-institutional body with delegated authority for quality assurance, before they can
report credits from assessment against unit standards or deliver courses of study leading
to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Consent requirements and an outline of the moderation system that applies to this
standard are outlined in the Conesnt and Moderation Requirements (CMR). The CMR
also includes useful information about special requirements for organisations wishing to
develop education and training programmes, such as minimum qualifications for tutors and
assessors, and special resource requirements.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016