Marking out pattern, corebox or model components
Overview
This standard identifies the competencies you need to prepare for and mark out materials and components used in the production of pattern, corebox or model parts, in accordance with approved procedures. You will need to interpret correctly the information contained in the drawings, instructions and specifications, which will relate to the production of set-outs, or to the marking out of component parts or the full pattern/model.
You will be required to select the appropriate marking-out equipment to be used, based on the features to be marked out and the accuracy required, and this will include the use of precision instruments. You will need to use these instruments to mark out datums, allowances and cutting lines that will be used in the production of the required components or full patterns/models. Materials to be marked out will include ferrous, non-ferrous, non- metallic and composites, which may be in sheet form, sections (such as square/rectangular, round, hexagonal), part-machined components or sub-assemblies.
Your responsibilities will require you to comply with organisational policy and procedures for the marking out activities undertaken, and to report any problems with the marking-out equipment, materials or activities that you cannot personally resolve, or are outside your permitted authority, to the relevant people. You will be expected to work with minimum supervision, taking personal responsibility for your own actions and for the quality and accuracy of the work that you carry out.
Your underpinning knowledge will provide a good understanding of your work, and will provide an informed approach to applying marking out methods and procedures to patterns, coreboxes or model components. Your knowledge will be sufficient to enable you to identify incomplete, conflicting or inadequate information, and to undertake the marking-out activities to the required specification. You will know why different tools are required to mark out different materials, and why it is important to mark out accurately. You will understand why measuring instruments are calibrated and the reasons why calibration records need to be maintained as part of the quality control programme.
You will understand the safety precautions required when working with marking out mediums, tools and equipment. You will be required to demonstrate safe working practices throughout, and will understand the responsibility you owe to yourself and others in the workplace.
Performance criteria
You must be able to:
- work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
- obtain and use the correct information for marking out
- obtain the appropriate marking out equipment and check that it is in a usable condition
- prepare suitable datums and marking-out surfaces
- mark out using appropriate methods
check that the marking out complies with the specification
complete relevant data and documentation
deal promptly and effectively with problems within your control and report those that cannot be resolved
Knowledge and Understanding
You need to know and understand:
- the specific safety precautions to be taken when marking out pattern, corebox or model components, and with the tools, equipment and marking mediums that are used
- hazards associated with the marking-out activities (such as marking-out mediums, equipment used, lifting and handling sheet material, long lengths of materials, splinters from wood), and how they can be minimised
- the protective equipment (PPE) that you need to use for both personal protection and the protection of other people in the near vicinity
- the process to be adopted for obtaining the required drawings and job instructions
- how to extract information from engineering drawings and related specifications (to include symbols and conventions in relation to work undertaken, first and third angle projections)
- principles of marking out and the type of equipment used (to include hand and precision instruments)
- the range of operations that the various marking-out equipment is capable of performing
- how to prepare the materials for the marking out activities, in order to enhance clarity, accuracy and safety (such as visually checking for defects, preparing the materials, removing sharp corners and edges, applying a marking- out medium where applicable)
- how to select and establish suitable datums
- the importance of ensuring that marking out is undertaken from the selected datums, and the possible effects of working from different datums
- methods of holding and supporting workpieces during the marking out activities, and the equipment that can be used
- use of marking-out conventions when marking out the workpiece (including datums; cutting guidelines; tapers; coreprints and sets; square and rectangular profiles; circular and radial profiles; angles; holes which are linearly positioned, boxed and on pitch circles)
- the use of scales when marking out models and model parts
- the use of contraction rules when marking out pattern and corebox components
- ways of laying out the marking-out shapes or patterns to maximise the use of materials
- setting and adjusting tools (such as squares, marking gauges, protractors and verniers)
- the importance of using tools only for the purpose intended; the care that is required when using the equipment and tools; the proper way of storing tools and equipment between operations
- the need for clear lines and dimensional accuracy in marking out to specification and drawing requirements
- what can go wrong with the marking-out activities, and how these can be avoided
- standards to be attained and company quality control procedures
- the extent of your own responsibility and whom you should report to if you have problems that you cannot resolv
Scope/range
Scope Performance
Scope Knowledge
Values
Behaviours
You will be able to apply the appropriate behaviours required in the workplace to meet the job profile and overall company objectives, such as:
- strong work ethic
- positive attitude
- team player
- dependability
- responsibility
- honesty
- integrity
- motivation
- commitment