This unit applies to complex spinning operations which require preparation of form chucks, oval spinning, thread spinning, or jobs requiring higher precision or quality using mainly brass and brass alloys. This unit also requires the use of a wide range of spinning accessories and processes, including the use of annealing.

Where there is a requirement to join spun materials or products in addition to, or instead of, (the spinning operation of) swaging, the following units may also be required: Unit MEM05003B (Perform soft soldering), Unit MEM05006B (Perform brazing and/or silver soldering), or Unit MEM05004C (Perform routine oxy acetylene welding [fuel gas welding]), or Unit MEM05012C (Perform routine manual metal arc welding)

Band: A

Unit Weight: 4

Path 1

MEM07030C

Perform metal spinning lathe operations (basic)

MEM07032B

Use workshop machines for basic operations

MEM09002B

Interpret technical drawing

MEM12023A

Perform engineering measurements

MEM18001C

Use hand tools

MEM18002B

Use power tools/hand held operations

ELEMENT

PERFORMANCE CRITERIA

1. Observe safety precautions

1.1. Correct safety procedures are observed and protective clothing and safety glasses are worn.

2. Determine job requirements

2.1. Drawings are interpreted and sequence of operation is determined.

2.2. Tools are selected to produce components to specifications.

2.3. Disc size is determined according to relevant procedures.

2.4. Disc is cut to the correct size and tolerance.

3. Prepare form chucks for spinning

3.1. Metal turning lathe is set up for machining form chucks according to standard operating procedures and standards.

3.2. Form chuck is prepared for general spinning as per drawings and specifications.

3.3. Form chuck is prepared for seaming/swaging joints as per drawings and specifications.

4. Perform complex spinning operations

4.1. Spinning speeds are calculated for various metals and metal thicknesses using appropriate mathematical techniques and reference materials.

4.2. Correct back centre and form chucks are selected and mounted according to procedures and specifications.

4.3. Prepared disc is mounted for forming.

4.4. A full range of spinning accessories is used including: back centre, holding and sectional chucks, tee-rest, compound and additional slides, recessed and cranked followers, rollers and knurling wheels.

4.5. Spinning, beading, recessing, oval spinning, screw forming, (thread spinning) seaming, swaging, trimming finishing, annealing and pickling operations are performed to specification.

5. Check components for conformance to specifications

5.1. Components are checked for conformance to specifications using appropriate techniques, tools and equipment.

6. Remove and store components

6.1. Components are removed from the spinning lathe without marking or any deformation.

6.2. Components are correctly stored and packaged to avoid oxidation and damage.

Required skills

Look for evidence that confirms skills in:

reading and interpreting information on written job instructions, specifications and standard operating procedures. May include drawings

entering information onto proformas and standard workplace forms

following oral instruction

using all types of metal spinning tools and accessories

calculating disc size and lathe speed including angles and radius

manual handling related to spinning products

coordinating use of multi-slides and tools, feeds and speeds

producing complex spinning shapes using a variety of processes and techniques

Required knowledge

Look for evidence that confirms knowledge of:

complex spinning operations, processes and techniques

requirements for maintaining tools and manufacturing form chucks

types of damage and defects e.g. tool marks, cracking, stress marks, thinning and incorrect finish

function and operation of accessories

methods used for each process

methods for stacking and protecting finished product

use and application of personal protective equipment

safe work practices and procedures

hazards and control measures associated with metal spinning lathe operations (complex)

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to perform complex spinning operations using a range of metal spinning lathes, accessories and measuring equipment. Competency in this unit cannot be claimed until all prerequisites have been satisfied.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.

Context of and specific resources for assessment

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.

This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with performing complex metal spinning lathe operations or other units requiring the exercise of the skills and knowledge covered by this unit.

Method of assessment

Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning should not require language, literacy and numeracy skills beyond those required in this unit. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.

Guidance information for assessment

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Tools

Spinning tools, planishing tools, backstick, trimming, beading tools, back centre, holding and sectional chucks, tee-rest, compound and additional slides, recessed and cranked followers, rollers and knurling wheels etc.

Complex spinning operations

Spinning, beading, recessing, oval spinning, screw forming, (thread spinning) seaming, swaging, trimming finishing, annealing, pickling, combined angles and multi-radii

Metals

Steels, aluminium, monel, copper, brass, brass alloys, zinc, pewter, silver, gold, tin, etc., of varying thicknesses

Unit sector

Machine and process operations

This unit contains employability skills.